Anyone run Stage 2 for a while then switch to 2.8"??
08-03-2006, 03:59 PM
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Anyone run Stage 2 for a while then switch to 2.8"??
Has anyone actually run with the GMPP Stage 2 for a little while, then switched up to a 2.8" pulley?? Was the difference noticeable? Dyno sheets?
08-03-2006, 04:03 PM
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Originally Posted by 1stbluSS
hp difference is nill. You will gain slightly more TQ.
I wouldn't say nill, Your adding more boost, and that is equating to more hp, for every lb of boost more you add, you can expect 8-10hp give or take.
08-03-2006, 04:04 PM
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Originally Posted by 1stbluSS
hp difference is nill. You will gain slightly more TQ.
08-03-2006, 04:32 PM
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actually guys i talked to intense about this and they said dont do it because the 42.5 lb injectors dont flow enough to compensate for the 2.8's ability to make more boost, so you wont see hardly any more boost
08-03-2006, 04:33 PM
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Originally Posted by hatrickstu
actually guys i talked to intense about this and they said dont do it because the 42.5 lb injectors dont flow enough to compensate for the 2.8's ability to make more boost, so you wont see hardly any more boost
How could that be true when iam running 42.5s with a 2.7, And iam seeing 19lbs.
08-03-2006, 04:34 PM
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Well on the dyno the hp numbers might be higher but in the car driving tells me the major difference is in tq.
I drove in a stg II car and then one with a 2.8. Felt nearly Identical. I don't go by dyno's because not all of that number is what is going to be transferred to the pavement regardless if it says whp or not. You will feel more bottom at the low end and little more push at the top. At WOT the STG II and the 2.8 STG II were neck and neck. You have to take into consideration that more heat is generated with a smaller pulley. Also the timing is for a 3 inch.
I drove in a stg II car and then one with a 2.8. Felt nearly Identical. I don't go by dyno's because not all of that number is what is going to be transferred to the pavement regardless if it says whp or not. You will feel more bottom at the low end and little more push at the top. At WOT the STG II and the 2.8 STG II were neck and neck. You have to take into consideration that more heat is generated with a smaller pulley. Also the timing is for a 3 inch.
08-03-2006, 04:36 PM
#14
42.5 lb will support down to a 2.8" safely from what I've seen, but no more. I do know that a 2.6" pulley is too much for 42.5lb injectors. If you drop to a 2.8" pulley on your stage 2, you'll love it. You will gain noticeable horsepower, but the instant torque is what you'll love the most!
08-03-2006, 04:39 PM
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^ i disagree with the HP by butt dyno but agree with the TQ
The easiest way to figure this out is to have a meet. I found that there is at least one of every setup at the meets i go to and hold. I have been able to hear all the exhausts available for this car inside the cabin and out and been to ride in cars with intense stg 5 , GM STG II, Intense STG 3, hp tuned vehicles.
One thing I have noticed. The intense stg 5 car wasn't blowing the doors off of anyone. It was faster than my car and the stg II but not by much. Perhaps it was the driver , just stating an observation I had. I think a lot of power is being stolen by heat.
The easiest way to figure this out is to have a meet. I found that there is at least one of every setup at the meets i go to and hold. I have been able to hear all the exhausts available for this car inside the cabin and out and been to ride in cars with intense stg 5 , GM STG II, Intense STG 3, hp tuned vehicles.
One thing I have noticed. The intense stg 5 car wasn't blowing the doors off of anyone. It was faster than my car and the stg II but not by much. Perhaps it was the driver , just stating an observation I had. I think a lot of power is being stolen by heat.
08-03-2006, 04:40 PM
#18
Originally Posted by 1stbluSS
Well on the dyno the hp numbers might be higher but in the car driving tells me the major difference is in tq.
I drove in a stg II car and then one with a 2.8. Felt nearly Identical. I don't go by dyno's because not all of that number is what is going to be transferred to the pavement regardless if it says whp or not. You will feel more bottom at the low end and little more push at the top. At WOT the STG II and the 2.8 STG II were neck and neck. You have to take into consideration that more heat is generated with a smaller pulley. Also the timing is for a 3 inch.
I drove in a stg II car and then one with a 2.8. Felt nearly Identical. I don't go by dyno's because not all of that number is what is going to be transferred to the pavement regardless if it says whp or not. You will feel more bottom at the low end and little more push at the top. At WOT the STG II and the 2.8 STG II were neck and neck. You have to take into consideration that more heat is generated with a smaller pulley. Also the timing is for a 3 inch.
Yeah, but that's not really a fair comparison. Two cars will respond differently to mods, every car is different. Perfect example: I went to IDD with Rob, and him and I had the same mods. We were identical except I had the GMPP manifold. He trapped 2mph higher the whole day, and et'd quicker with the same 60'. There will be horsepower gains, but you're right about it not being a whole lot. I would say the 2.8" is worth ~5-8whp, ~15+wtq.
08-03-2006, 04:41 PM
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Originally Posted by OniMirage
but wait how could numbers be different on the same car but the higher one is no better than the lower one?
I have seen 400 hp cars rip apart 500 hp cars of the same model. I can't explain it other than driver, gear changing or other misc. factors. All's I am saying is from a stock GM STG II and one with 2.8 you are not missing much. Now it will be a little faster but I bet if you raced someone with STG II and you had STG II + out of 9 races it would probably be 5-4 or 6-3 in favor of the 2.8
08-03-2006, 05:27 PM
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YIP!
You can feel the increase but she hesitates and feels like she is being held back and is inconsistent. Need a tune badly, if you're doing this make sure you get a tune shortly after!
You can feel the increase but she hesitates and feels like she is being held back and is inconsistent. Need a tune badly, if you're doing this make sure you get a tune shortly after!
08-03-2006, 08:10 PM
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start talking to local shops and see who has hp tuners, if no one has it ull have to wait til they do or pay it yourself. The 2.8 requires tuning, for me neways.
Last edited by p7x; 08-03-2006 at 10:28 PM.