pulley change...what type of gains can be expected? - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

newagemuscle · 12-25-2014, 10:38 AM

I have an SLP jackshaft style supercharger on my car right now. It is an LS3. Currently I am running the stock 3.8 pulley. I picked up the 3.6 pulley. What type of rear wheel horsepower gains can be expected from making a pulley change like that?

Bo White · 12-25-2014, 11:06 AM

20-25hp for every lbs of boost.

newagemuscle · 12-25-2014, 11:15 AM

Quote:

Originally Posted by Bo White

20-25hp for every lbs of boost.

if that is the case, I guess my next question would be how many pounds of boost will I pick up going from a 3.8 pulley to a 3.6 pulley? Does anyone know this?

old motorhead · 12-25-2014, 11:28 AM

Roughly 2psi and 35ish hp added. Some get more. A few get less. Lots of variables come into play. Can't guarantee the numbers. I can guarantee that you'll like it though

newagemuscle · 12-25-2014, 11:36 AM

Quote:

Originally Posted by old motorhead

Roughly 2psi and 35ish hp added. Some get more. A few get less. Lots of variables come into play. Can't guarantee the numbers. I can guarantee that you'll like it though

That sounds promising. Here is my dilemma if you want to call it that. I currently have the TSW Nurburgring wheels which are a fairly light weight wheel for their size. I decided yesterday to order some new shoes for my car and it turns out I could be picking up 4 lbs at each corner. Granted they are an inch wider front and rear, but they are also cast instead of forged. Do you guys think doing a pulley change from the 3.8 to the 3.6 will make up for the weight I am adding at all four corners and still give me gains? I am wondering if I should just go to the 3.4 pulley instead. I just don't want looks to totally kill my performance.

RBL · 12-25-2014, 12:29 PM

Quote:

Originally Posted by newagemuscle

That sounds promising. Here is my dilemma if you want to call it that. I currently have the TSW Nurburgring wheels which are a fairly light weight wheel for their size. I decided yesterday to order some new shoes for my car and it turns out I could be picking up 4 lbs at each corner. Granted they are an inch wider front and rear, but they are also cast instead of forged. Do you guys think doing a pulley change from the 3.8 to the 3.6 will make up for the weight I am adding at all four corners and still give me gains? I am wondering if I should just go to the 3.4 pulley instead. I just don't want looks to totally kill my performance.

If your motor can handle the boost then why the hell not go to the 3.6?

newagemuscle · 12-25-2014, 12:39 PM

Quote:

Originally Posted by RBL

If your motor can handle the boost then why the hell not go to the 3.6?

I already have the 3.6 and was planning on installing it. I am now considering going with the 3.4 to negate any horsepower loss I may have by going with a heavier wheel. If you read my above post I explained my dilemma.

smokum · 12-25-2014, 12:50 PM

Just do a 3.4 it made 10lbs on my maggified 417.

swiftkart · 12-25-2014, 01:14 PM

On a LS3, do the 3.4 retune and enjoy!

old motorhead · 12-25-2014, 06:59 PM

You won't feel the extra 16 lbs you added. Your imagination is running wild if you think you can feel that little bit of added weight. That's about what 2.5 gallons of gasoline weighs. Can you tell when you have 3/8 of a tank vs 1/2 of a tank of fuel without looking at your fuel gauge?

newagemuscle · 12-25-2014, 07:05 PM

Quote:

Originally Posted by old motorhead

You won't feel the extra 16 lbs you added. Your imagination is running wild if you think you can feel that little bit of added weight. That's about what 2.5 gallons of gasoline weighs. Can you tell when you have 3/8 of a tank vs 1/2 of a tank of fuel without looking at your fuel gauge?

You sound like my brother. That's what he keeps telling me. I guess I'm probably looking into things too much.

12-25-2014, 10:38 AM	#1
newagemuscle Philippians 4:13 Drives: SLP Supercharged LS3 Join Date: Aug 2009 Location: The Motor City - Michigan Posts: 2,902 View My Garage	pulley change...what type of gains can be expected? I have an SLP jackshaft style supercharger on my car right now. It is an LS3. Currently I am running the stock 3.8 pulley. I picked up the 3.6 pulley. What type of rear wheel horsepower gains can be expected from making a pulley change like that? __________________

12-25-2014, 11:06 AM	#2
Bo White Drives: 2015 Summit White 2SS 1LE Join Date: Feb 2012 Location: Vance Alabama Posts: 8,019	20-25hp for every lbs of boost. __________________ Retired wanna be cylinder head porter 2015 2SS 1LE Clutch reservoir, Vararam DRX, ported TB, TSP 2" headers, MGW shifter Totalled: 2010 1SS Wilkes Performance/Eagle 416 shortblock, TSP custom valvetrain, PRC 260 heads, Edelbrock Pro Flo 102, th400 swap, 8" PTC 5500 stall= 535/435 at the wheels tuned Gen 3 Performance and Dyno 10.97 @ 124 full weight in 3100 DA CamaroFest X

12-25-2014, 11:28 AM	#4
old motorhead Drives: Maggie blown LS3 vette Join Date: Aug 2009 Location: SE TX Posts: 1,490	Roughly 2psi and 35ish hp added. Some get more. A few get less. Lots of variables come into play. Can't guarantee the numbers. I can guarantee that you'll like it though

12-25-2014, 12:50 PM	#8
smokum Drives: 2010 2ssrs Join Date: May 2013 Location: DFW Posts: 827 View My Garage	Just do a 3.4 it made 10lbs on my maggified 417.

12-25-2014, 01:14 PM	#9
swiftkart Drives: 2010 SS/RS LS3 M6 Join Date: Apr 2011 Location: Kansas Posts: 693	On a LS3, do the 3.4 retune and enjoy!

12-25-2014, 06:59 PM	#10
old motorhead Drives: Maggie blown LS3 vette Join Date: Aug 2009 Location: SE TX Posts: 1,490	You won't feel the extra 16 lbs you added. Your imagination is running wild if you think you can feel that little bit of added weight. That's about what 2.5 gallons of gasoline weighs. Can you tell when you have 3/8 of a tank vs 1/2 of a tank of fuel without looking at your fuel gauge?