December 2008

Wednesday, December 24, 2008

DynoTech : Dragon 800 midrange PCIII mapping II

Here's Casey Mulkins' PCIII midrange tuning. These numbers have seemed to eliminate the part throttle surging he's had riding his sled with stock pipe and the 154hp WOT map.

He tried the big numbers I punched in intuitively, and they were way too fat. He gradually brought those numbers down and here's where he improved the drivability of his sled. His High RPM map is still the way we programmed it, with negative numbers.

5000 0 0 2 2 2 2 2 2 0
5250 0 0 5 5 5 5 5 5 0
5500 0 0 5 7 7 7 7 7 0
5750 0 0 5 9 9 9 9 9 0
6000 0 0 5 5 7 7 7 5 0
6250 0 0 5 4 4 4 4 4 0
6500 0 0 4 4 3 3 4 4 0
6750 0 0 3 3 3 3 3 4 0

Next Dragon 800 on the dyno will get this map installed, and we'll see what it does for midrange A/F ratio and BSFC. We're planning to create new maps for the production DynoPort and Bikeman single pipes when we get them.

This midrange D8 PCIII map came from Chad Okeson, of Okeson Off trail Sales in Detroit Lakes MN, who tweaked one of his customers' PCIII to improve Casey's first map even further. As you can see he has added fuel at lower RPM than Casey's first midrange map. If you're using Casey's midrange numbers on your PCIII and still have light hesitation or surginess at the lower RPM try punching these numbers into your PCIII.

1/2/09 Here's another map with more fuel added at lower revs. This one is from Chad okeson of Okenson's Off Trail Sales in Detroit Lakes MN. Try this if you still feel lower RPM leanness of hesitation. Thanks Casey and Chad. 

2    5   10  20  40  60  80 100

0    0    0    0    0    0    0    0   500
0    0    0    0    0    0    0    0   750
0    0    0    0    0    0    0    0  1000
0    0    0    0    0    0    0    0   etc
0    0    0    0    0    0    0    0
0    0    0    0    0    0    0    0
0    0    0    0    0    0    0    0
0    0    0    0    0    0    0    0
0    0    0    0    0    0    0    0
0    0    0    0    0    0    0    0
0    0    0    0    0    0    0    0
0    0    0    0    0    0    0    0
0    0    0    0    0    0    0    0
0    0    0    0    0    0    0    0
0    0    0    0    0    0    0    0
0    0    0    0    0    0    0    0
0    0    0    0    0    0    0    0
0    0    0    0    0    0    0    0
3    7    5    5    5    5    5    0  5000
3    6    9    9    9    9    9    0  5250
0    5    9    9    9    9    9    0  5500
0    5    9    9    9    9    9    0  etc
0    5    5    7    7    7    5    0
0    5    4    4    4    4    4    0
0    4    4    3    3    3    4    0
0    4    4    3    3    3    4    0


Sunday, December 21, 2008

DynoTech : January 2009 dyno schedule

1/1 Bill Rogers stock Dragon 700 with reflash stock testing plus SLP and Dynoport pipes for PCIII mapping top end fuel is very safely overrich, see full report
1/2 private session, cams off
1/4 518ers Alan w/ Yamaha 700 Viper triple N2O made 159 na with Bender triple pipes, amazingly added 50 with a battery powered n2o box that feeds fuel from the stock mechanical fuel pump, looking for even more in a week or so,  Dave w/Vmax4 bigbore, ...the 945cc Justin Fuller ported big bore with 4 44 Megatron carbs, Power Inc pipes made 250 which is the highest power na Vmax 4 tested here, was going for more with offset key but a loose flywheel cover dowel ate the stator before more HP could be created...Justin Full Power 4Tek header testing..another 3-1 stainless header, this one easier to make than the previous prototype header that made significant HP, but this one disappointed us with HP about equal to stock. All 3-1 SS headers are not creating equal HP...
1/5 Joe Martin Firecat Boondocker tune bone stock 04 with 2 deg key, VForce, D&D Ypipe, BMP stealth pipe fitted with stock pipe heat shield, stock muffler of course, Boondocker tuned perfectly to 153 HP at .60plus 11.5/1
1/6 Bill Swoyer, CS HO800 hillclimber, CS twins on CS mod makes very big but private HP  late PM Jeff Sherlock, F1000 with new whisper-quiet Jaws twin pipes new Jaws twins with incredible whisper-quiet muffler can easily pass for stock dB but also make big tq and HP...155 lb/ft 220 HP on this one...   and a F7/860 Lakeracer stroker Rich and RJ's na Oneida Lakracer cranks out 194 HP after tweaking fuel and D&D Monster twin pipe header length to optimum...
1/9 kyle cook, HTG 1200 triple, 990 twin Kyle's 1200 lakeracer made 278hp, lower than most HTG big 1200 race gas triples--Rob thinks it needs timing and compression to bring it up another 20hp. Kyle's 990 twin ProX lakeracer has been giving him fits of hard to understand deto. Turns out the lectron carbs are buzzing and foaming the fuel, causing fuel flow to surge wildly and leaning the engine out...this can be cured with a combo of softer engine mounts and carb boots, larger needle and seats, higher fuel pressure, and added carb weight to dampen the vibration. Remember Jim Cooper cured his foaming megatron carbs with about 7 lb of steel that served as a rack to tie the carbs together.  Will hopefully Kyle be back with both sleds.
1/10 or 11 SledWerx Spenc stock Dragon 800 w/ DynoPort single, BMP single and other stuff for PCIII mapping Spenc couldn't get his clutch off so Wayne Stoutner subbed with his D8--created great maps for DynoPort and BMP pipes, and also found a pile of nasty richness at 3/4 throttle in the midrange that had been causing annoying bog letting off the throttle from 90mph. It took a large block of negatives, removing nearly 20% of the fuel flow there and the misfire is gone. Many PCIII users have adopted this version of the CC (Casey Chad) midrange map that we call CCW (Casey Chad Wayne). 
1/12 Mark Burns Xfire1000 Boondocker tune, TCat Hooper big bore 1230 triple Mark's XFire with 2.5 deg key, BMP Ypipe and single pipe/ stock muffler tuned safely to 183chp. The big triple is a dandy, with a broad HP plateau that even I could clutch to, but I think Mark doesn't want his pals to know his HP.
1/13 going to JD Powersports in Rochester NY for SuperFlow 902 training. JD has new 902 and are having SF Brett Williamson coming to fine tune/ train them at their Cat turbo tuning facility. SF is warming me up to upgrade my 22 year old but dandy 901 console to 902 for $18,000 and I need to see how it works before I go into debt again.
1/14 Chuckaroo noonish trying to up his PS1000 DTR highest HP record some more. Chuck's latest iteration has buzzing carbs similar to Kyle Cook's, often plaguing solid mount strokers, just as it was leaning out at 9200 from foaming fuel it made 280 plus observed before tightening up. I should have had the copper tube bolted to this one, although it may have just lean-squeeked which we couldn't hear on the detophones.
1/15 BMP race ported F6 with stock pipe modded and fitted with stock heat shields, and stock muffler this made a dandy 146hp with Boondocker tuning.
1/16 All cancelled
1/17 Justin Full Power w/ three hopefully 400 HP Yamahas (cancelled)
1/18 Carl Therieult, Cat M8 w/ D&D shim kit, then Ypipe, then single pipe. This was dandy enough to post on DTR as a tech article. Great bang-for-the-buck at $250 for the shim kit and head mod (drops the combustion chambers into each hole to maintain squish/ compression with raised cylinders).
1/21 Jeff Palermo SkiDoo "500" 120 safe hp w/ modded muffler
1/22 Justin Fuller three or four more Yamaha turbos Todd's RX1 hillclimber made 466, Johnny's Apex lakeracer ran out of fuel pump capacity at 322 and Joes Apex trail sled made 300 plus.
1/23 Rick Kubecka, dragon 800 with twin pipes for PCIII tuning IQ race chassis w/ bone stock Dragon 800 EFI engine set up for hill drags, a set of custom twin pipes, tuned PCIII on race gas touched 170chp with a flat plateau. A bump in timing/ compression should add lots to this one...

1/24 HTG session Cams off, 11AM Mike Brisbane F7/8 twin pipe Mike had a hand-modified stock muffler silencing the D&D monster twins last time, but that stock muffler was way to tight for the high flowing F8, creating deto causing our copper tube to crackle and snap...went home, bought a D&D can that is made for the twins. Loud but free-breathing, made 170 at nearly .70 lb/hphr on his tug hill map with no hint of click.
1/25 Ed Derby's repair four sled marathon..Carl's 660 Pol twin, Blade 91 HTG twin, F1000 trail sled w/ n2o, Edge RMK 860 Engine Tech...Ed came solo with a trailerload of sleds to tune for himself and his customers. Started Sunday, finished Monday. One highlight was tuning a Boondocker carb N2O system. Ed was here a few years ago with one of those and we had an awful time trying to create proper and quick additional fuel flow to match the N2O delivery. This time we got it right, and I need to post some details on the tech pages.
1//26 Private test, cams off.
1/27 open
1/28 Private test, cams off
1/30 H Kirsch and MKoz Big Cat Lakeracers cancelled due to snow and lack of parts
1/31 Scott Brownlee and his pal Nelson Cadieux of Carlson Sports RV center in North Bay Ont, 4 big Cats to tune make that 5 big cats to tune! Scott and Nelson made their fourth trip to DTR to tune. This time five Carlson's and customers' sleds prepped for dyno tuning (clutches, hoods off, etc). Got them all tuned on Sunday, including the shop's Z1 with HiJacker and several higher flowing aftermarket mufflers maxed out on 91 octane and on straight fresh C12. This one deserves a tech article. Stay tuned. 

Monday, December 15, 2008

DynoTech : One Cheater caught after the Shootout

 I have a difficult situation with the Arctic Cat Crossfire 1000 "stocker" brought in by Big Moose Arctic Cat at the 19th annual Adirondack Shootout. After reviewing the Shootout acceleration ET MPH data, I have to conclude that it was way too fast. It had to be a cheater. I am suggesting to AmSnow Sr Editor Mark Boncher who was at the Shootout, that he eliminate the results of the Crossfire 1000 from the Shootout, and leave the Z1 results as the Unlimited Class sole participant.

During the Shootout we make on-site real-time comparison of stock vs trail mod difficult since we public address and listen to 1320' results of stockers and 1000' results of aftermarket trail mod sleds. But after getting back home and assessing 1000' results of stockers I can see clearly the supposedly stock 166hp Xfire1000 was much more powerful than that. In 1000' it was as fast as D&D's 195hp 901cc piped Xfire800 clutched and driven by Scooter, and faster than Bikeman's stock Xfire 1000 with BM pipe, reeds, and dyno tuned at my place at 193hp.

I should have been diligent enough to realize that when the stock Crossfire 1000 was much faster than the Z1 in 1/4 mile something must have been amiss, and we should have teched the Crossfire 1000 immediately on-site.

Once again, mia f'ing culpa.

But even though the Unlimited Class results are tainted by this, the 600 class and 800 class results are as they should be. 

When we decided at the last minute to have an unlimited stock class to differentiate from the 800's we included the two big Arctic Cats-- Z1 turbo and the Crossfire 1000. And because it was an all-Cat class, George Taylor and I unwisely assumed that the dealer Big Moose Yam/ Arctic Cat would leave things alone and let the sleds run stock. They were already bringing a trailer-full of Cats and Yamahas to dyno certify, and a second trailer was a lot to ask. There should be no incentive for them to cheat one over one another since they were the same brand. So we allowed Big Moose to keep the sleds, no dyno certification and lock-up, let them run in the Unlimited Stock class amongst themselves. AC lobbied for some miles on the Z1 for breakin and we concurred that that was acceptable, and Big Moose was allowed to run the sled on the trail for the breakin miles AC requested with no supervision.

The Z1 was surely left stock--the timed performance was commensurate with power to weight ratio. It's reasonable to let those Z1 results be included in the Shootout.

But for now, in the interest of fairness to everyone including the very important aftermarket participants, the Crossfire 1000 results should be deleted.

After The Shootout banquet at the Trail's End Restaurant in Old Forge, Big Moose Cat tech Vince was overheard bragging that he had fooled us by cheating with modifications that I won't disclose here. That explains the too-fast performance of the Big Moose Crossfire 1000 that closely matched the 190 plus HP Crossfires brought by D&D and Bikeman.

Today I called Big Moose co-owner Phil Martin to explain this discovery. He indicated no knowledge of this cheating by Vince. I can accept that, because I'm sure that Phil and Jon Martin both have IQ's high enough to realize the negative results of this buffoonery--make the Z1 look slow so no one will want to buy them? Make the aftermarket trail mod Crossfires from D&D and Bikeman look like a poor investment? Make their Crossfire 800 sleds look slow?

I'm awaiting a response from Mark Boncher, Sr Editor of Am Snow who covered the Shootout. George Taylor and I had stressed to all dealers the need for a flawless Shootout and this is what we got. It was Mark who sold the AmSnow owners on partnering once more with us for Shootout 19, and I'm hoping this doesn't create a problem for Shootout XX.

Saturday, December 06, 2008

DynoTech : Amsnow Shootout mod sleds 12/12

As has been their requirement since including aftermarket demos years ago, AmSnow requires aftermarket participants to be display advertisers. The minimum is 1/6th page in the February issue, on the stands in January. Closing for add space commitment is 11/25. Plus $500 per sled to Shootout Committee.
In solid:
D&D Z1turbo pump gas, one with race gas, Xfire 800 with mods maybe 901 big bore, Lakeracer Tony Koz' Big Cat turbo

Boondocker: Crossfire turbo 

CJ Motorsports/ Full Power [stage 1 turbo 4Tek, stage 2 turbo 4Tek], lake racer Full Power apex turbo Mark Tangas

DynoPort Dragon 800 w/ DP single pipe, XP800 with DP single pipe, BJ XP860 with DP single pipe, lakeracers: HTG 4 cylinder 400hp al motor, Rich's 1000 triple very lightweight lakeracer  

Bikeman Xfire 1000 with bolt-ons, Dragon 800 with BMP single pipe, SkiDoo800R/880, SkiDooTNT posible

Boyesen Reeds: RK Tek XP860 with Jaws twin pipes

SLP cancelled
Ulmer Racing havent heard anything