Stock LS3 boost limit? best pulley for Magnuson?

[T-r3x]

Originally Posted by Chris82xx

Power is just a number determined by a machine. Every machine differs, as does every blower setup. I'm going for more power now, but it has no bearing on how fast I can get the car up to. A car making less power on a Maggie can out perform my car with a centri depending on the run. So, really the question is, what goals are you trying to accomplish?

580 rwhp would be great with my mods. But which pulley size should I use?

[Aqua_Blue_SS]

Originally Posted by T-r3x

580 rwhp would be great with my mods. But which pulley size should I use?

I'm at 580 with a 3.4 pulley, long tubes, no cats, livernois fuel pump. 9.5#'s. Will need bigger injectors if i want to go higher.

[T-r3x]

Originally Posted by KRIS10's $ponsor

I'm at 580 with a 3.4 pulley, long tubes, no cats, livernois fuel pump. 9.5#'s. Will need bigger injectors if i want to go higher.

So do you think I can make 580 HP with my mods?
Magnuson fuel injectors, ZL1 fuel pump, Long tube headers, no cats

[UNRIVALED SS]

You're going to be close on injectors. I was only able to get 570 out of the ZR1 injectors. It`s pretty close, it`s possible you could do it with what you have. Give it a try and if the duty cycle on in the injectors is manageable you can save some cash.

[T-r3x]

Originally Posted by UNRIVALED SS

You're going to be close on injectors. I was only able to get 570 out of the ZR1 injectors. It`s pretty close, it`s possible you could do it with what you have. Give it a try and if the duty cycle on in the injectors is manageable you can save some cash.

I'll check!
Did you install any thing else with the injectors and the headers? a cam for example ?

[newagemuscle]

Originally Posted by T-r3x

Hey guys
I've finally bought a supercharger for my 2010 Camaro M6 :headband:
Long tube header + 2.5" cat-back + ZL1 feul pump + wideband installed
I bought the Magnuson kit which comes with 3.8 pulley (6 psi)
This supercharger will make about 125 HP with this pulley compared to 150+ HP with the SLP supercharger!

My question is (How far should I go with the boost to gain 150-160 HP? What's the best choice for the pulley?)

waiting for your replies
Thanks all

First of all, I realize every dyno can produce different numbers and it should be used as a measuring tool. I had similar mods as you do prior to installing my blower (Kooks 1 7/8 catted LT's, SLP LMII axle back, roto-fab CAI, and custom tune). I picked up the SLP TVS 2300 (Jackshft style) last year which is basically the same as the maggy. I am also running the stock 3.8 pulley. I did not use SLP's out of the box hand held tune due to my other mods. I did a before and after dyno run. Before the blower I put down 410 to the wheels. After the install I did 547 to the wheels. All in all I picked up close to 140 rwhp. I am also interested in going to a 3.6 pulley, but realize I would probably need other supporting mods, such as the ZL1 fuel pump you mentioned. I would assume that would put me close to 580 rwhp on my tuners dyno. Most of all I am concerned with remaining safe with a stock bottom end.

[jessrayo]

Originally Posted by T-r3x

Did you make that number with stock ZL1 fuel pump?

No, as soon as the build started I went to a dual pump set-up. The ZL1 pump is only good to about 600 whp. The AFR's were great, was running 110 octane race gas. Car was amazing but the 4 bolt head couldn't contain the combustion pressure with continuous pushing of the engine. That is why the high horsepower LSX block is a 6 bolt head. The engineers understood that if you push the horsepower limit the pressure may lift the head enough to blow out the gasket so they designed the block with extra head bolts.

[UNRIVALED SS]

If I recall corectly at the time the car was at that power level (570 WHP). It was running a fairly conservative cam shaft, in addition to headers, CAI, fully 3" ARH exhaust in fact. It was dynoed with a 3K stall converter in the georgia heat on 91 octane gas from the Quick Trip station around the corner. Stock fuel pump as well but I wouldn't recommend or advise you try that stunt. I've been fortunate and I only ran the car on the 1/8th mile for the most part. Don`t remember the boost numbers at all honestly.

[Bo White]

Originally Posted by KRIS10's $ponsor

I'm at 580 with a 3.4 pulley, long tubes, no cats, livernois fuel pump. 9.5#'s. Will need bigger injectors if i want to go higher.

I'm in the same boat. Same power level and pushing 97% duty cycle. I'll have to buy more than just valvetrain parts on my next round of mods.

[Stingr69]

Originally Posted by jessrayo

My opinion but based on over 10 grand worth of experience.

"10 grand worth of experience" That is just so perfect.

[1LESSPROBLEM]

Go with the 8 rib setup and dont try to pulley down too far with the 6 rib. The belt will just slip and you wont make the boost you should. I know this from experience. You can run just about as much boost as a 2300 can push on a stock bottom end as long as the tune is good.

[2010SSRSM6]

Without the ADM FPCM I would keep the boost under 8 psi (3.6" pulley) even with the ZL1 pump. Without the updated programing in the FPCM the pump will not ramp up in the higher rpm range and is not much better than the factory SS pump. Depending on what octane you get where you are, header size and the dyno, I doubt that you will see much more than 520rwhp.

With a mild cam, 1.5" LT's, Vmax TB, CAI inc cai for the maggie, 3.6" pulley and OD cogs I was very close to the limits of the ZL1 pump @ 9 pounds of boost. I'm running 1000cc injectors (850's would have been fine, but I had issues with FIC's 850's and they were no where near maxed out), I was at 590rwhp on crap 91 "winter blend" california gas in 108* heat.

I changed out the TB to BBK's new 95mm and jumped up to 620rwhp. I need to get my tune checked to make sure that everything is still ok, but this is as far as I am willing to go until I can make the motor bullet proof(ish). I'm going to wait and see how the new squash returnless system works out for others before I make a fuel system/motor build change.

Good luck!

[T-r3x]

Originally Posted by 1LESSPROBLEM

Go with the 8 rib setup and dont try to pulley down too far with the 6 rib. The belt will just slip and you wont make the boost you should. I know this from experience. You can run just about as much boost as a 2300 can push on a stock bottom end as long as the tune is good.

Do you think I need to upgrade the fuel injectors or upgrade to 8 rib if I will use a 3.6" pulley?

[T-r3x]

Originally Posted by 2010SSRSM6

Without the ADM FPCM I would keep the boost under 8 psi (3.6" pulley) even with the ZL1 pump. Without the updated programing in the FPCM the pump will not ramp up in the higher rpm range and is not much better than the factory SS pump. Depending on what octane you get where you are, header size and the dyno, I doubt that you will see much more than 520rwhp.

With a mild cam, 1.5" LT's, Vmax TB, CAI inc cai for the maggie, 3.6" pulley and OD cogs I was very close to the limits of the ZL1 pump @ 9 pounds of boost. I'm running 1000cc injectors (850's would have been fine, but I had issues with FIC's 850's and they were no where near maxed out), I was at 590rwhp on crap 91 "winter blend" california gas in 108* heat.

I changed out the TB to BBK's new 95mm and jumped up to 620rwhp. I need to get my tune checked to make sure that everything is still ok, but this is as far as I am willing to go until I can make the motor bullet proof(ish). I'm going to wait and see how the new squash returnless system works out for others before I make a fuel system/motor build change.

Good luck!

I use 95 fuel, do you think I can push the boost 8 psi with the ZL1 pump ?