Re: 300hp doable out of a Z22SE?? ,use less fuel then 450HP
winstar said:
ara_ara_ara said:
just wondering is it possible to get 300HP out of a Z22SE and use less fuel then a GM 450HP LS1 V8????
the thing is i have a holden commodore SS tuned up to 450Hp...
even thou it's fast..IT'S HEAVY and and rides like a bloody truck....puke..
i like the feel of the Vec on the road...
lot more manageable and has good feed back when driving hard.....
and the big question is how much will it cost to get 300HP out of it??
if it can get about 300HP out of it then it will be faster then the commodore..
vec= about 1.4 tone
SS= about 1.6 tone
The current Courtenay stg 2 SC conversion produces upto 250bhp, but is rev limited to the same as standard engine, due to not over stressing the con rods.
If you look at the torque curve it isn't begining to drop off so even by just increasing the rev limit more should be possible.
However Courtenay's are working on a stage 3 version with steel rods and higher boost that should produce in the region of 300 bhp.
sorry bout bringing up an old post but i had to clear this up.
the reason Courtenay is keeping the stock rev limiter is because of the s/c. The Eaton m62 cannot be reliably taken past 7000 rpm because the rotors cannot handle it (they will blow just like the connecting rods in an engine would). the rotors of the s/c are spinning at double the speed of the engine, which would take that 7000rpm figure to 14,000 rpms(which is already getting close to F-1 rpm's). Also to take the Z22se engine up to 300hp or so all you need to do is replace the connecting rods. in addition to this the reason you're not seeing the torque curve drop off is because of the way the roots blower works. as long as the engine is spinning faster the s/c will keep making more power, once either the engine or the s/c fail (or you take the foot off the gas) then the torque curve will decrease.
the way to make more power on the s/c is to decrease the pulley size, this makes more boost at the same rpm's since all you're basically doing is re-gearing the s/c. the problems that arise with smaller pulley are numerous and more devastating. i.e. knock, s/c getting hotter, compressed air being made piping hot, possible detonation in the intake manifold from super-hot air+gas fumes ect. all of these have solutions. many of which focus primarily on keeping the s/c and intake cold. thats why in drag cars and bonneville salt-flats race cars you see ice/dry ice being put into a tank that covers the intake to keep air intake temp as close to freezing as possible (ice is typically used in cars with extreme psi numbers and even more extreme engines). so yea long story short: smaller s/c pulley along with cooling mods makes z22se's go past 300hp.
