stock hp vs crank 180degree

[DA YAMMIE]

hey all just a few questions on the 92 vmax4 #1 what is the stock h.p and #2 what is the increase in h.p with the crank 180 degreed and how much work is involved to have the engine set up for 180 ?

[fastmax]

Stock HP on a stock 92 is about 132 hp. The 93-94s were about 140 hp. No HP gains to changing your crank to 180.

[rj21]

You will feel alot more bottom end at 180 because it will then be a big twin.

[vmax4rules]

It will also be even harder to start on a cold winter day.

[JG4 my 4]

All of the above is right,its really cool to have all the bottom end power to play with:)
I dont know exactly what is done to make it work but I do beleive you have to change out the cdi box to fire the cylinders in this order the guys on here will help you will finding more out about that.

[VMAX535]

Unless you are running 10,000+ rpm no need to index crank to 180*. It is done for harmonic reasons. It will require a RPC, Pony Pac (Hauck), Bender or MSD cdi to fire at 180* at a minimum cost of $300 - $400, if you can find someone to give one up. I paid $450 for my RPC from a fellow member.

[Jabber800]

VMAX535 is right on but I'll add one thing.. For trail riding the sound of a quad at 90 is unbeatable!! Don't do it for a trail sled.. These sleds can run very hard at 90 degrees for a trail runner...

[Lakeshadow]

I like the idea of an MSD cdi for my 92. Since my sled has a faulty box now I don't know what it runs at. And the tach is broke. The previous owner never knew the r.p.m.'s of this sled before the cdi went bad. It is a mystery if it is ported. I do know it has a 180 crank, and Aaen quads. I suppose I can get an idea of r.p.m.'s by what spring and weights are in the Comet clutch on the sled.
I do know the previous owner was getting a reputation at White Lake because of winning races.
I think I should put a box on this thing and see what I got for sure.
Could I get some opinion on cdi choice if you all will? That would be great. Thanks...

[VMAX535]

I do know it has a 180 crank, and Aaen quads.

If you are runninig a 180* crank you will need a RPC or other as I have mentioned. Suggest if you are running Aaens put the crank back to 90* and run the stock 800 box.

[opsled]

VMAX535 is right on but I'll add one thing.. For trail riding the sound of a quad at 90 is unbeatable!! Don't do it for a trail sled.. These sleds can run very hard at 90 degrees for a trail runner...



OOOOOHHHHH, YEAAAAAAAAA

A blind man would want to ride a 90 fire 4 over all others!!!



opsled