I remember doing some reading that said if you reduced pulley size by X then HP increased by Y. I was currious to what that was? I searched but could not find this specific answer.

Thanks.

 

.10 for 10hp I think

For every pound of boost added, it's usally 10hp added.

 

on average it's about 7-10hp gained from every lb of boost you add.

 

I see, so the stage 2 kit goes from a

3.35

to the

3.067 stage 2 pulley

thats good for

19-28.3 hp gain?

Are we talking wheel or crank HP here?

IM also assuming that 1.0 in the size = 1.0 lbs of boost?



also what is the added torque? average?

so the 2.8 would be a

33-48 hp gain?

 

I think the 3" gives about 20 whp over stock. A 2.8 may yield 30 but definately not 48. This is wheel horspower.

However, if you use a 2.8, you will need tuning so that will make it a bit more than 30.

 

I C, so about 20 HP where 2.8 would be 30. Makes sense.

I was at the track with a person who had the Intense Stage 3 kit. He had the 2.8 inch pulley and I was faster then him. He said he installed it the night before and tried to tune it himself with the MAF box he had. It had a few switches in it and 2 turn things and he said thats how you tuned it. IM assuming the reason he was slower then me was because of not getting it tuned? Is he supose to tune it through that box?

 

Yeah he definately didn't have it tuned correctly. Also, that kit does not work on the 2004 saturn ion redlines either. You need to have a scan gauge of some sort to tune it. I was going to go with the kit but it's just too much tuning. It comes pre tuned when you get it but if you have like an intake or exhaust or both you will have to retune it. That's the only downside.

I should have my 3 inch pulley on by next weekend. I will also be dynoing my car on the 29th. I'll have an intake/exhaust/pulley. I'm hoping for around 240 whp the least.

Oh yeah, you are supposed to tune it through the Maf T. It tricks the computer into dumpnig more fuel into the engine.

 

I C

he had intake/exaust and Stage 3, so I guess that was his problem. I was in shock when I beat him for the night with the best 1/4 mile time I even ran at the same time as him (both crappy runs for both of us) and pulled and pulled and pulled.

 

Also, with stage 2, is it kool to stick with the stock plugs, or should I look into 1-2 step colder plugs?

 

everyone gave these redneck calculations for hp from boost levels.... it's impossible to say 1psi = 10hp cause the first psi might give you 10hp, 2psi might give you 14hp and 3psi might give you 18hp.

everytime you add boost on a blower like ours it also increases the amount of energy required to turn the blower at those levels, so the gains will fluctuate

 

Absolutely, that's why the numbers above are all estimates... from car to car it differs, and the higher you boost the more inefficent that boost becomes because of heat.

In my expirence with turbo and supercharged cars, 7-10hp is a nice average.

 

Also you must have the supporting fuel to go with the extra PSI of boost. Plus the fact that for every higher PSI in the manifold it equals one differential PSI less passing through the injectors ...

 

Well a 3 inch pulley is alright on stock injectors, stock engine, etc. People have done 2.9 but I wouldn't. Someone did a calculation of the boost in one thread a LONG TIME ago. If the boost was consistant, 1 psi for our car would be like 8.33 hp. I'll try and find that thread but it was like 3-4 months ago....

 

I hear this works too...

 

I heard the same thing about reading

 

what logging software is out there? im prety handy with a MAFT

 

If his best 1/4 time was greater than a 14.2 with those mods, he has some issues. Did you murder him off the line or what?

 

I heard it was approximately 10hp according SFPH. I bought the NGK BKR7E and my car runs smooth now. I gapped them to .045 they came gapped with .035 but I was reading and everyone said to gap them between .040 and .045. The stock plugs i'm sure will be fine for stock applications but when adding higher boost they say to go colder

 

Thats what I recall.