You will bend the rods before you lift the head. Doo head studs are 1mm bigger in diameter than Yamaha's and use more threads for holding power. The quickest Turbo XR1200 on ice & grass isn't running studs or rods (its stock). Just trying to save you some work.
tapex_07
TY 4 Stroke Master
- Joined
- Feb 15, 2009
- Messages
- 1,160
- Country
- USA
- Snowmobile
- '10 Nytro MTX SE IMPULSE 174x3
'14 Viper XTX SE MPI 159x14x1.25
'07 Apex RTX SC2 MPI 128x1
Not to bash or anything, but the fact that the AC is running 30+psi and the other 2 are very close with much less boost isnt really impressing me... I think its more impressive that your Dads sled, on 15-17psi, is right there in all the runs you explained. I know too that there are alot of variables there, but anything over 22-25 is A TON of boost. Its just my own opinion....
millstreet
Lifetime Member
- Joined
- Dec 6, 2005
- Messages
- 448
- Location
- doylestown, pa and old forge, ny
- Country
- USA
- Snowmobile
- current - 2018 Sidewinder ltx-le 50th
tapex_07 said:
go to dynotechresearch.com, join up, and check out the test results for A/C, Ski-doo, Yamaha, pretty much everything. 30 psi in the A/C motor is not the same as 30 psi in the Yamaha or Ski-doo. All the dyno results for Full Power, D&D, everyone. Lots of interesting insights from some of the best minds in the snowmobile world.
Here are some results taken from different tests on dynotech's site;
Full Power Ski-doo 1200 @ 11psi -- 250 HP
D&D A/C Z1 @ 22psi -- 267 HP
CPR Apex @ 11 psi -- 246 HP
Cool stuff in there, well worth the join up fee.
Those Apex #s look familiar AJ ?
.
.
tapex_07 said:
The cat is onkly a 2 cylinder.Pushing that kind of power is amazing.You can run 300hp out oof a stock engine and stock turbo.A yamaha you need a lot more work.
