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Summer Schedule, DYNO UPDATE

still working on the air refridge system, est fireup for cold intake air is 7/15.

6/30-7/6 pro snoX race engine development, cams off

7/8 Glenn Hall Z1 finalizing cam timing/ tuning early AM to beat the heat.

7/9 Jess Pych Cat grassdragracer tuning for Syracuse.

7/10 YammieGod Tony tuning a Yammie triple for Outlaw drags

7/11 Tony Buczack Imp Stock carbureted F7 built by Jason Owens, Jaws high rpm pipes

7/24 Tony Buczak back again, discovered he had his flywheel keyed to stock keyway instead of the 5 degree offset keyway, now 186hp with stock airbox and airhorn, Cowie modded boots.

7/25 Tripod Dan dialing in a PS1000 for Sysracuse. 178hp

7/29 Quad dirt dragracer w/ Mach Z twin and Boondocker N2O, tuned both to perfection.

7/29 Full Power Justin trying Tripod Dan's CS PS1000 pipes on a Yamaha PS1000 (made out of a SRX700) picked up 25 HP, is now welding/ hacking to get the pipes fit before Syracuse drags....

7/29 long day, tweaked on a Yamaha Nytro stocker and a 700 improver--the 700 IS is just matching the 700 Cat improved stock good HP and spotting them 70 lb....

RIPPED DOWN THE SF901 WIRING AND CONTROL CONSOLE, INSTALLING NEW 902 STUFF TO MODERNIZE, SUPERFLOW TECH GUY IS COMING NEXT TUESDAY TO TRAIN THIS OLD DOG ON THE NEW TECHNOLOGY. ALSO WAITING FOR THREE HUGE OVERSIZE CONDENSERS TO COOL MY WINTER AIR SYSTEM--THE ONES I HAD WERE REQUIRING LONG RECOVERY TIME. HOPING TO BE UP AND OPERATING WITH 902 AND DRY WINTER AIR ON 8/19.

Summer happenings---

Slow season is here--waiting for new models to be shipped. We were scheduled to test a new 600 Fusion in June, but Rich Daly from DynoPort snatched it first, ostensibly to create better exhaust etc before it comes to DynoTech (now July).

I dyno tune maybe one asphalt sled a week now, and maybe one bike on our CycleDyn eddy current chassis dyno. So Sean Ray and I have taken this slow time to upgrade both the CycleDyn and the SF901 sled dyno to the newest Windyne doftware. There are many advantages to the new software, but primarily that accomodates O2 sensors in exhaust to give us A/F ratio, and with the new software continuing to use our accurate Airflow meters, we get airflow CFM, fuel flow lb/hr and BSFC lb/ hp /hr. We'll aslo be able to map EFI, measuring TPS, baro sensors (both one and two bar).

While I'm waiting for the new SuperFlow software and comuter upgrade, Carl McQuillen shamed me into finding places for miscellaneous but important stuff that only rests as piles of clutter on the two dyno tables. So I have installed many new Home Depot cupboards in the control room and dyno room to hold and hide everythng relating to hooking up whatever, to our two dynos.

Next I'm having installed dirt/ grease colored ceramic tiles in the control room to replace the impossible-to-keep-clean asphalt tiles.

Finally, I'm in the midst of engineering snowmobile dyno drive shafts for his new breed of too powerful hand built multis. The last straw is a guy who wants to bring a Union Bay 16xx triple that might break my 1.25 standard rubber dampened drive shaft. When shafts break, violence occurs and I was wise to have oriented the sled engine table 90 degrees from the viewing window--hence during a dozen shaft explosions nothing has pierced the walls protecting the operator and spectators. It's comforting to know that I have bulletproof glass in front of my face, but disconcerting knowing that testicles are protected by two sheets of 1/2" drywall.

Now that people regularly want to tune 300+ HP gonzo torque mountain motors and turbos I am in the process of designing an 1.75" diameter, fully torsionally dampened dyno drive shaft. I'll have that done by the time my new software packages are installed. Bring 'em on!

subscribers who can dial in chassis' for others

I would like to make a listing of DTR subscribers who can, for a fee, do clutch/ chassis tuning for individuals. Dialing in engine HP on the dyno and finding engine RPM HP peaks at various pipe center section temps is half the battle. To get that HP to the ground engine alignment, clutching, suspension, track prep etc is critical.

If you are a subscriber who does this full or part time, please email me what you provide (ie: individual name or company name, brands you dial in, if you have clutch components on the shelf, have a test track (or a mountain nearby), track dyno, cost per hour (optional), hours or days of operation, address and day phone number/ email address.

I will try to create a listing by Zip codes/ postal codes/ country codes and post a listing somewhere on my website. Maybe we can help complete the performance tuning package for DTR subscribers.

Stock sleds needed for drive belt testing

I'm in the process of putting together a dyno test program for aftermarket snowmobile drive belt performance comparison.

The concept is to take a stock sled, dyno at crankshaft like we usually do, then install drive clutch and driven clutch, slide the sled forward on my dyno table, connect dyno drive shaft to custom sled jackshaft that will allow jackshaft to drive SuperFlow dyno driveshaft instead of chain to driveaxle. This will allow us to measure horsepower delivered to jackshaft/ drive axle at various engine/ vehicle speed with various drive belts.

I need to "rent" stock engine sleds to do this testing if possible.

In exchange for one or two days of of drive belt/ clutch testing, the sled owner will get a day of whatever dyno testing he would like to do, value 8 hrs x $125 = $1000. Or we can work out less dyno time and cash to boot. And there will be drive belts (the ones that work better than OEM) to go to the sled owner. Engine/ sled safety will be gauranteed by DTR/ belt manufacturer.

The first sled I need for this is a bone stock (other than timing/ fuel tuning that we can temporarily put back to stock) 03/ 04 Firecat F7. Then I need to line up a dozen other performance sleds for similar testing, I will post a detailed list next week. If you are nearby, have a F7 EFI stocker we can use, please Email me at info@dynotechresearch.com.

Spring/Summer/ Fall dyno schedule

Every year the sled dyno seems to get slower, and here it is (along with MC SuperFlow CycleDyn eddy current roller dyno schedule) for Spring-Fall 2013:

3/16 Jeremy Higgens (MC) Yam YZ450F flattracker (RLJ-Ron Jewell engine)

4/7 Sean Ray (MC) H-D FLH

4/16 David Wells (MC) Suzuki RMZ450 flattracker (RLJ)

4/18 Cory Van Ameron (MC) Honda CR85 flatracker

4/18 Jeremy Van Ameron (MC) Kaw KLX125 flattracker

4/22 David Wells (MC) Suz RMZ450 flattracker back for more HP

4/23 Sean Ray (MC) H-D FXS EFI turbo (he custom builds those)

4/28 Scott Barrett (MC) Honda CRF450 flattracker another high HP RLJ engine, tuning for max HP

4/29 Sean Ray (MC) anther H-D turbo for boost/ fuel/ timing tuning

5/1 Kenny Coolbeth (CT MC Nat'l number 2) Kaw KX450 flattracker RLJ looking for still more HP

5/4 Sean Ray (MC) H-D turbo FLH testing different exhaust config

5/5 Jerry Wells (MC) Honda CRF 450 flattracker RLJ engine

5/5 Dave Waters (MC) KTM 950 flattracker tuning

5/14 Al Rowcliffe (MC) Honda CRF250

5/22 Tristen Avery (VA, MC) Honda CRF450 RLJ engine

5/23 Cody Johncox (MC) H-D 750 flattracker tuning carbs for restrictors

5/23 Jim Davis (MC) Yam YZ125 flatteracker

5/23 Mike Luczak (MC) Honda CRF250 flattracker

5/24 "Angus" (MC) Honda CRF450 flattracker trying to find missing HP

5/25 Tim Nurton, Hentges mod 600 Polaris twin

5/25 Sean Ray (MC) H-D FLH turbo trying one more exhaust system

5/25 Unknown (MC) Kaw Z1000 street bike PCV tuning

5/27 Hank Holden (MC) Kaw ZX10R streetbike, header, no EXUP, PCV tune

5/29 Sean Ray (MC) that same FLH turbo, one more exhaust mod (trying to find elusive boosted HP on the bagger)

5/30 Me (MC) tuning my turbo Victory V92C (serial number 0038) with PC3

6/8 Derek Dicastro (MC) H-D FatBob 96" PCV tune

6/9 Tristen Avery (VA MC) Honda CRF450 flattracker back for more RLJ HP

6/9 Brian Neuman (MC) Honda CRF450 flattracker RLJ engine, carbureted

6/12 Mike Luczak (MC) Honda CRF250 flattracker once more

6/12 Mike Luczak (MC) Yam YZ125 flattracker

6/17 Angus (MC) Honda CRF450 flattracker, 20 HP is still missing!

6/19 Clark Angarano (MC) ZX10R stocker with Guhl Motors reflashed ECU that holds the throttle blades open to the rev limiter 180+ HP!

6/19 Danny Angarano (MC) stock Triumph 675 speed triple

6/20 Greedy Kenny Coolbeth (MC CT) back with another Kaw KX450 RLJ engine

6/20 Gene Hurin, HTG Polaris 1000 triple Imp Stock pipe testing

6/21 Frankie Amalphie, Yam SX700 asphalt racer with Race Logic template porting (worked great)

6/27 Cody Johncox (MC) H-D 750 flattracker, RLJ engine mods

6/28 Mike Zacher (MC) Honda CRF450 RLJ flattracker

6/30 Sean Ray (MC) testing the same FLH this time with no turbo to make sure engine was fine, and it was almost a powerful as it was with 10psi boost???

6/30 Tim & Brian Tyler, Pol 800 twin PS

6/30 Jason Owen, Arctic Cat 800 twin carbureted PS (over 200 HP)

7/4 Dave Waters (MC) KTM 990 flattracker

7/14 Mike Luczak (MC) Honda CRF450 flattracker

7/14 Mike Luczak (MC) Yam YZ125 flattracker

7/27-29 Pro private engine testing DynoCams off

7/29 Justin FPP Fuller, SkiDoo 4tek turbo with H2O/ methanol injection and pump gas

8/1 Chris Wells (MC) RD400 Cafe Racer for carb/ timing tuning (doubled his HP)--Chris also has a TZ750 in parts in his garage...I made him promise to bring it here for tuning!

8/1 Joe Iannello (MC) Suzuki 1400 Intruder for carb tuning--some dealer had butchered the carburetion and I spent 5 hours changing pilot and main jets (stock it has one Mikuni and one Keihin carb!). Now it's perfect. I gotta quit bragging--I dislike working on carbs.

8/2 power hungry Gene Hurin back again with HTG Pol 1000 Imp Stock

8/7 Tim & Brian Tyler, Hentges mod 600 for PS grass drags

8/8 Paul Moore, Quad dragster with 1200 PWC mod engine/ methanol fuel for carb/ timing tuning

8/10 Can't remember his name, (MC) H-D 117" twin cam PCV tune

8/22 Justin Jones (MC) Honda CRF450 flattracker engine newly modded by RLJ,

8/23 Andy Stiles, Hentges 600 mod IQR sled for improved stock grass drags

8/25 Chris Metz (MC) Aprillia 1000 streetbike, mod exhaust, PCV tune

8/26 Cody Johncox (MC) H-D XR750 flattracker one more time

8/28 Tripod Dan Cross, HTG 1130 outlaw drag sled, maxing out HP with timing/ fuel tweaking

9/7 Jess Hellwig, Cat 800 stroker PS from Pro Stock, Inc

9/13 Jeff Stinson, Cat 700 Imp/ PS with Jaws High RPM pipes, water in one hole

9/13 Ken Aldrich, Cat 800 stock drag sled

9/19 Jason Owen, PS800 Cat twin

9/20 Tripod Dan, XCR800 improved stock

9/24 John DeAngelo Cat XF1200 Boondocker turbo

9/24 Dave Wells MC, Ron Jewell modded Honda CRF450 flattracker

9/25 FullPowerPerf Justin, VMax4 800 prostock

9/28 Bill Tranter RKTek SkiDoo 827 tune deto-free on 87octane

9/29 Jim Sigg (pal of Jay Owen) MC--HD 103 bagger

10/10 Pete Beasely MC--Victory 106ci bagger

10/16 Don Zuzze 03 F7 stocker, fuel pressure tune for grass drags

10/17 Paul "sponge" Spry, F8 improver Boondocker tune for grass drags

10/17 James Chittenden ZRT600 hotrod

spring/ summer dyno schedule

4/2 Pat Kitchen, Joe DiSpirito Cat 1500 triple asphalt sled

4/6 Jim Sigg 103ci H-D PCV tune (CycleDyn)

4/7 Don Puleo 107ci H-D PCV tune (CycleDyn)

4/12 Randy Crouse, Cat 1200 twin, tuning N2O

4/13 Heath Lynk Pol 1080 triple trail sled

4/13 Harry Jones Honda CRF450 flattrack bike (CycleDyn)

4/22 Ron Jewell Kenny Coolbeth KX450 (CycleDyn)

4/25-5/6 Todd Hogan testing Boyesen Rad Valves on Etec 800, compare early ecu flash to 2013 flash-- results posted

5/6 Troy Butts Yam YZ450 (CycleDyn)

5/6 Mike Luczak Honda CRF450 flattracker (CycleDyn)

5/11 Ron Jewell/ Kenny Coolbeth Kaw KX450 one more time (CycleDyn)

5/12 Cody Fowler Hayabusa PCV tune (CycleDyn)

5/20 Dave Wells Honda CRF450 flattracker (CycleDyn)

5/23 Don Ohlson Hayabusa PCV tune (CycleDyn) we tuned this bike a year ago, ran perfectly until this spring then began losing power and finally broke a connecting rod. New engine was installed and it ran perfectly while cruising but at high revs WOT would lose HP. So back to the dyno A/F was perfect until WOT high RPM then it would go lean (instead of the proper 12/1 it would show 16 or 17/1!). PCV adjustment made no difference. So we checked fuel pressure and as expected the fuel pressure dropped as revs climbed meaning plugged fuel filter/ defective fuel pump. Don tried a new filter and fuel pressure still dropped at high revs, then he sprung for a new in-tank fuel pump and all is perfect now. So that tired $350 fuel pump cost him a $5000 engine repair. Moral of this story--if your EFI engine begins to lose power at high revs CHECK THE FUEL PRESSURE.

5/24 Mike Zacher CRF450 and CRF100 Flattrackers (CycleDyn)

5/24 Brian Neuman CRF450 Flattracker (CycleDyn)

5/24 Wade Blood Kawasaki Vulcan PCV tune (CycleDyn)

5/27 Neil Jacobs tuning 107 cubic inch 280hp Kaw Pro Stock dragbike on the 902 shaft dyno

5/28 Frank Burns H-D VRod big bore PCV tune (CycleDyn)

6/1 Dave Wells tuning CRF450 with Ron Jewell mod (CycleDyn)

6/9 Al Rowcliff CRF450 with Ron Jewell head (CycleDyn)

6/9 Frankie Amalfi and Yammigod Tony Yam SRX700 asphalt racer

6/13 Bill Woodley TC88 PCIII tune (CycleDyn)

6/23 AJ Frank using 902 shaft dyno to tune his trail mod Banshee 350 quad

6/24 Aaron Mucher Yamaha FZ1 PCV tune (CycleDyn)

6/25 Jerry Jankowski Honda Blackbird Turbo carb tune (CycleDyn)

7/1 Brad Crocker setting up his Bender Pol 600 mod engine for H2Ocross racing

7/21 Keith Crowell Yamaha R6S streetbike PCV tune (CycleDyn)

7/28 Jake Lehnen searching for power with his SkiDoo RS600 hilldrag sled

8/2 Pat Kitchen again with 1500 triple Joe D engine

8/3-8/30 intermittent private testing cameras off

8/31 Tim Tyler Polaris 800 twin drag engine

Spring- summer 2011 schedule etc

4/20 Chukaroo Hamrah/ Steve Petshke very powerful PS1000 asphalt drag engine.

4/21 PAer Marty Walborn, full mod Banshee drag quad w/ billet 850cc engine.

4/21 pm Dave Weisner/ Steve Mazolla 936cc Storm asphalt drag engine

4/22 Ron Cooper SkiDoo 600 mod water racer

4/22pm Ryan Muehlig Polaris 600 mod water racer

5/7 TR McGinnis Yamaha YFZ450 making more power with Wood drag exhaust. Photo shows how we dyno tune quads, with measured fuel flow gravity fed from a Holley float bowl to the carbs.

5/16 anonymous racer tuning a crankshop SkiDoo 800 twin full mod

5/25 Gene Hurin w/ HTG 1000 triple improver, testing the new Lectron 50 mm carbs. Gene was the victim of stale C14--the worst of the worst when it comes to losing it's light ends--he bought it from a supplier in Albany NY out of a re-sealed 50 gallon drum, came here and on the first pass four-corner seized it at a "safe" 12/1 and 80 degree F coolant. So now we know that it was net lean-to-death 16/1 in the combustion chamber, then the globules of unvaporized fuel were vaporized by heat and burned in the pipes, fooling the wideband measuring A/F ratio at the pipe outlet. So piston was fixed, and Sunoco Maximal from a full new drum was used, no change in carb settings, ran 20 passes with even leaner power jet settings down to 13/1 and no problem. I like those new 50mm carbs too!

5/27 Chad Andolina w/ SkiDoo 800 triple asphalt sled

6/3 Mark Cross Banshee 350 mod field drag quad, added 12 hp with maxed out jetting/ timing!

6/3pm Tripod Dan Cross dyno tuning his HTG1250 triple--added 20 hp by removing bad race pipes and installing pipes from his PS1000 engine.

6/4 Dave Waters, KTM950 flat tracker w/ intake restrictors, featured in last month's Cycle World

6/6 Matt Wise, Yamaha SRX600 imp stock

6/7 Kevin Hazel Harley XR750 flat tracker w/ intake restrictors

6/12 Ken Coolbeth (AMA #2) from CT, 2011 Kaw KXF450 flat track modified engine--were slower on the track than the 57hp dyno sheet the engine builder gave him, made 50 HP here, local bike engine modifier is redoing the engine, expect 60 real HP next time.

6/13-16 Glenn Hall w/ D&D Z1 Magic Turbo system, turbo engine testing different tubochargers and throttle bodies. 506 HP at 41-42psi boost--will post the actual dyno test results...

6/17 Frankie Amalfie Vmax SX 700 stock engine w/ Hauck Husher pipes

6/17 Jim Chittenden ZRT600 light mod asphalt racer w/ Aaen pipes

6/18 Chad Andolina back again with new Jaws race pipes for his SkiDoo 800 triple mod asphalt racer

6/24 anonymous racer with Crankshop 800 twin race engine

6/25 John Dandrea w/ D&D SS 900 Firecat, winter tune with cold dry air system 80 degrees and humid today, used cold air system to feed 30 degree dry air to the intake, Boondocker "internet map" was too safe 171hp at .75 lb/hphr, we tuned John's F9 EFI to pump gas safe 174hp at .70 and also a lakerace map 179hp at .60

6/26 Alex Izzo with Triumph Daytona 675 w/ home-built Rotrex supercharger system--tuned PCV to 155 RWHP at 11.8/1 (took about three hours to create a boost-friendly map).

6/27 Jesse Calvert F7 stock dragracer

7/5-8 gone fishing with my 12 yr old son Marty.

7/10-7/13 AMA #2 Ken Coolbeth Kawasaki 450 flattrack racer Ken had this engine modified, got a 57hp dyno sheet from the builder, bike was slow at the track, brought it here with local bike engine modifier Ron Jewell (RLJ Racing), dyno tested here at 49hp (less hp than stock)...Ron tweaked the ports, lowered compression, modified the exhaust and on 7/13 made 59hp. Now the bike is fast.

7/16 Sean Ray new FatBoy 96" getting normally aspirated baseline fuel numbers on his new stock H-D Fatboy 96 cu in engine with much larger Delphi injectors. This was to prepare for installing one of his Garrett ball bearing turbo systems with new Power Commander V with new boost/ intake temp sensor. Planning to display the bike at Sturgis w/ DynoJet. Expecting 200 RWHP with 96 cubic inches, hence the need for larger injectors.

7/16 Make Hatcher RLJ Honda CRF250

7/19 James Ristoli/ engine builder/ tuner Floridian Ryan Kelly two Suzuki 600 roadrace bikes, tuning for max power with Yoshimura EFI ECU/ software.

7/30 Tripod Dan testing an unhappy PS1000 engine

8/5 Sean Ray using CycleDyn to Power Commander/ power Vison tune his new all black FatBoy stock 96" engine (turbo cams and heads) with an all-black turbosystem he manufactures (SeanRayTurbosystems). He was planning to display/ demo the bike with the DynoJet guys at Sturgis, took him 30 minutes to create a perfect tune, made well over 200hp here, then 214hp out at Sturgis without breaking a sweat. fatboy ran 10.4 and 132mph at NYIRP

8/9 Brad Crocker tuning Pol 600 twin Flannery mod, DynoPort pipes

8/10 Justin FPP tuning on an Etec 800 turbo

8/18 Sean Ray tweaking on a PS800 polaris twin, cams off.

8/25 Billy Howard's bad-ass 2012 Cat ProCross 800 (incredible results posted now)

8/28 Sean Ray tweaking more on the PS800 polaris

8/29 John Diangelo dialing in a new MSD/ new bigger FPP turbo on his SkiDoo 1000 triple

8/31 Barry Taggart, PS1000 Yamaha triple FPP

8/31 Barry Taggart IS700 Yamaha triple FPP

8/31 Jim Chittenden Cat ZRT600 mod

Some new data

I checked al my 3.5" floppies at home--my Boss Noss data is on another computer either at work or on a newer (seriously used but cheap) computer being reconfigured by Jimmy Cooper. So I opted to do a graph of Darrell Gaglianese' 05 F7 carbed sled. We dyno'd it stock (way better than 03-04 no 5 degree offset keyway needed) it has a much better airbox carb inlet, check out Bikeman modded stock single pipe vs D&D F7 monster single. Which one do you like? Do you seek max peak HP with minimal midrange torque/ HP or max midrange torque/ HP with a bit less peak HP? Test and data will follow shortly.

SnowWeekShootoutCertificationDone!

We started out "freeview" testing our live streaming audio/video Sunday while testing consumer MachZ. By mid test the website suffered from viewer overload, and it shut itself down.

Then Monday, when we were dyno certifying the Doos and Pols the same thing happened. So to reduce viewer load, our webguy shifted the DynoCams to subscriber only access. So as I understand everyone had uninterupted viewing of the certification today. As viewer load increases the webpeople will upgrade equipment to provide uninterrupted viewing.

SnowWeek has requested exclusive use of certification dyno test numbers for their publication. Since we have partnered with them for the Adirondack Shootout we will wait until they publish the dyno numbers in SW later this month before we put those numbers online here.

I've got some very tentative dyno tuning scheduled for Thursday AM, some aftermarket Trail Mod guys may tune here before SnowWeek Shootout at Woodgate, NY on Friday.

After that I'll be dyno tuning an F7 Sunday 12/12 beginning 10 AM, the F7 owner may not know he will be on dynocam but we will be there, everyone can see his tuneup. If he doesn't want his pals to know what he's up to, we won't mention his name, and he may have to wear an Al Qaeda-like scarf on his head.

Before I leave for Shootout, I will try to post some meaningful recent dyno stuff.

SnowWeek/ DynoTech/Adirondack Shootout, current and upcoming projects etc

Last week I had an F6 travel 1300 miles (one way) from New Brunswick to tune a Firecat, probably a new distance record. The owner requested anonymity, so all you NE Canada guys can do is look for an extra pair of hose clamps on the hose from the fuel pump to the injector rail on a newly extra-quick F6.

Next week, we're dynoing a 600 SkiDoo twin with a 732 Big Bore. Hoping that this will be positive, information that we can share.

Also next week we're doing a popular XCR800 tuneup--DynoPort triple pipes, cylinder shim to increase port timing, various combustion chambers, reeds, etc.

I'm surrounded by Polaris Fusions sitting in dealers' warehouses--no one is knocking at the door here yet but if no one shows up I will try to borrow one from Cooper Sales/ Service next week. I had heard that Polaris was going to allow their dealers tuning access to Fusion ECU's, but are now understandably rethinking that. The Fusions have deto protection so there's seemingly no need for Polaris to tune fatly, but if they are we will try to figure a way to override the fatness and get big HP like we do with the Firecats.

No 1000cc SkiDoo twins available just yet. I'm hoping that we will have an independant sample prior to the SnowWeek/ DynoTech/ Adirondack Shootout in Woodgate on Dec 10. Also where AmSnow required aftermarket trail mod particpants to be display advertisers in their mag, Snowweek/ Snowgoer will not require that. Anyone who has REAL trail mod packages to sell/ show off, you are welcome. Thi year it is really trail mod, no pro stock dragracers, stock tracks, trail carbides, (our) pump gas, engines teched (bere/ stroke/ compression etc). Maybe an organized trail ride for the trail mods before putting them on the track at half-time?

One contentious issue is aftermarket sale of fuel pressure dropping devices for Firecats. Because of the WIDE variation in stock F7 fuel flow these things must be dialed in on instrumented dynos to be safe.I have dyno tuned many dozens of Firecats--stock fuel flow varies more than 10%!! So if you take one of the [lucky like Ziggy] properly tuned stockers and lean it out by blindly reducing fuel pressure it will probably be toast, just like Ziggy would have been on the dyno if observant dyno people hadn't caught it.

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