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DOOTalk Forums > Ski-Doo Snowmobiles > REV-XR Chassis - 4 Stroke Performance and Trail Models > 4-TEC Turbo Talk
bowser
I was wondering if any one has tried to race a apex that had a stage 3 turbo and $15,000 in up grades in the motor when they line up with a 1200cc (any info on the ski-doos would be nice and the out come of the race) I'm not brand loyal (I don't think so any ways).I'm just looking for a good race, I know I don't even have a 1200cc but it might change soon.
SKIDOOCHRIS
don't you think the nyto would be a better comparison?
http://www.powderlites.com/skidoo.html
here is what a yami turbo builder says
powderlites
We are going to start pushing boost up and run some bigger turbos and see how far we can go.
Drag racing this 1200 at Fernie, BC snow drags and everyone was surprised how fast it was at only 13 psi boost. I have rode this for a few rides at 15 psi and torque is what makes track speed fast.
2900 RPM engagement and one of the quickest out of the hole with no lag at all.
We have run against RX1 with 125 HP shot of NOS and setup just as a drag sled with over 20 psi boost, meth injection etc. Finger track 151"and I know we can Doo the screaming 4 cyl in.
Let us know if you really want to beatup a few of your buddies on a Doo.
Don't look at HP as much as Torque we got out of this engine. 14 psi boost =210 fts lbs Torque!
Remember cyl pressure pushing down on 91mm pistons is the trick here when boosted. checkeredflagg.gif
TURBO KITS 250-836-4422
bowser
I was just wondering how much does it cost to do one of these ski-doos up because one guy in another town payed $15,000 for someone to buy all the stuff and payed him xtra
Adrenaline Addiction
How are the belts and secondary clutch holding up ?
SKIDOOCHRIS
QUOTE (Adrenaline Addiction @ May 14 2009, 10:09 PM) *
How are the belts and secondary clutch holding up ?


the 1200 primary looks like it was made in china, so
if you got the money for a turbo kit just add in the extra cost of a good clutch like a STM
steveo10
Dave, how high of boost until internal engine work is needed?
powderlites
We have been riding at 15 psi boost which is well over 300 HP without any problems at all.
I have been around motorcycle engines since Z1 Kawaski bike etc in 1975.
It doesn't matter how well built a engine is, detnonation will kill them all.
lots of talk about cast pistons or rods but so far I don't see a need to changed them out untill we go real big and find out.
I am very conservative when starting a new project and don't beleive in blowing up motors and then finding out something else is wrong like to high compression or lack of fuel etc.
I take the attitude that the smartest guy will win races and ride the longest instead of throwing thousands of $$$$$$ in parts or prototype parts.
japaneese build there engines with computers that are made for so many millions of cycles and so much hp before they even cast a single part.
What RPM, How much HP,How much torque, Weight, Fuel mileage, etc etc. Yes they even fail at certain things but do we really know how much power we can get from this engine without hurting it?
Only time will prove who know's what there doing and who is taking a guess.
I am going to say that with my years of experance in Motorcycles and my older brother who is 70 building dragsters and other go fast toys I listen, have open mind, and a way of seeing things in my head before trying it out first.
Where is the real over 400 HP 1200 motor? Will it live for a few runs on a dyno or pull down the lake?
I will build a monster with the help and support of friends with a passion to go fast.
We don't want our customers to be rats blowing up motors!
I think 20 psi boost will be quick with a very well designed and complete package.
I have seen apex's with 20 psi boost get smoked by a 12 psi boost same sled but different turbo system or setup.
Boost is not boost! Efficency and balance of every thing makes power.
PowderLites
longsled
I tested it many times. at same boost, blower or turbo, the 1200 is FAR FAR in front of an apex. I tried it against 4 different stage 2 apex last spring at a drag event.

look this video, i' in the middle. The apex in the right track was the fastest of the 4 present at that race...

Tpex again T1200
Turk
Thompson Manitoba drag races march 21.
Dealers 1200 turboed doo vs 03 RX-1 with powderlites turbo clutched by me.
Doo was running about 2 pounds more boost & was dialed in with supreme tool primary. was not pretty for the doo.
Here is the video. That race is about 1:47 into the video.
Thanx

http://www.youtube.com/watch?v=2etyUP1rqL4
cryoman51
could have sworn i read "doo vs apex", but i have been wrong before.lol laugh.gif
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