Any S/Cgers with more than 6 psi of boost for a GA

[WOLF]

Just a question. Or can you take that one that you can buy from RSM and tune it to produce around 8-9psi. Why? A 75 hp increase is rather piddley concidering a stock motor puts out 175hp so your only getting around a 40% or less increase in hp.

Man the supercharger you can put in LS-1's can produce over 60-70% more hp.

Plus, say if I add a bunch of aftermarket stuff and get around *just picks a random #* 240hp compared to the stock 175, wouldn't that increase the amount of extra hp you'll get from a supercharger from 75 to maybe 90 or so?

[WOLF]

yeah, um, just noticed I posted in the wrong area.

This was suppose to go to the "all go" area and it ended up here instead.

[qwik99gt]

From what I have seen, all the superchargers availible for the 99+ 3.4L are factory rated at 6psi of boost. You can change this by using a smaller pulley. I have heard murmurs of 9 pounds on this site. The problem with a large amount of boost is the relatively high compression ratio of our engines(9.5:1?). We also have cast iron engine blocks, which hold more heat than newer aluminum blocks. Plus you would need a new FMU (Fuel Management Unit) to deliver the extra gas.
Question #2: Yes, more mods means more power gain with a SC. The biggest gain can be had from headers, as our manifolds are very restrictive. A 3" exhaust, ported heads, ported TB, and ported intake complete the package, and add more hp than they would on a N/A car.

PS- comparing our engine to an LS1 is like comparing a... well... a Grand Am to a Corvette. 10x the technology of our meager sixes.

[MetaGTP1]

Originally posted by qwik99gt
From what I have seen, all the superchargers availible for the 99+ 3.4L are factory rated at 6psi of boost. You can change this by using a smaller pulley. I have heard murmurs of 9 pounds on this site. The problem with a large amount of boost is the relatively high compression ratio of our engines(9.5:1?). We also have cast iron engine blocks, which hold more heat than newer aluminum blocks. Plus you would need a new FMU (Fuel Management Unit) to deliver the extra gas.
Question #2: Yes, more mods means more power gain with a SC. The biggest gain can be had from headers, as our manifolds are very restrictive. A 3" exhaust, ported heads, ported TB, and ported intake complete the package, and add more hp than they would on a N/A car.

PS- comparing our engine to an LS1 is like comparing a... well... a Grand Am to a Corvette. 10x the technology of our meager sixes. The Magnuson SC kit comes with 5 psi boost. I installed a 2.5" pulley and seeing 7-8 psi of boost. As the weather cools down, I will probably see close to 10 psi. There is a noticeable difference in power. I estimate a 10-15 hp improvement with the new pulley. That would put my hp at about 265.
In answer to question #2, the biggest gain for the SC would be ported/polished heads, bigger fuel injectors and PCM tuning. The LS1 has more displacement and better breathing, which yields considerably higher gains with forced induction. :cool:

[jaketuff]

I am slinging about 9psi-10psi of boost with my smaller pulley.
Lean conditions arise with this psi though, and my fuel system will be upgraded soon.

JOUT