Pro charger suggestions

**z28misfit** · 07-19-2006, 01:00 PM

I have a 99 z28 and would like to run a pro charger
Current mods G5x4 cam
FAST90mm intake and throttle body
slp 85mm maf
slp underdrive(pretty sure this will have to go)
pacesetter race headers and y pipe
loudmouth
4.10 gears
Rebuilt tranny rated to 600 or so hp
spec stage 3 clutch
Current hp is 412rwhp.

I would like to put heads on this car and possibly rebuild my bottom end.
Which pro charger kit should i consider(this is not a daily driver)

***Ed Blown Vert*** · 07-19-2006, 01:52 PM

The D1 should be fine

**Packy** · 07-19-2006, 02:16 PM

Definitely the D1-SC!!!

**Killer_bluebird** · 07-20-2006, 07:15 AM

Ok as far as the charger the D1-SC is a good choice. However you'll need to keep in mind that besides loosing the slp underdrive you will probably need to also loose G5x4 cam. Now if you go back to a stock cam you'll make only about 450-475hp so it doesn't sound like a huge improvement over what you have now. However with a nice FI friendly cam you'll be putting between 500-550hp. Just things to keep in mind as you plan your upgrades.

lt4ever · 07-20-2006, 07:51 AM

What's the max psi boost the D1 can handle? I've heard its in the neighborhood of 12 psi. Is that correct?

**Killer_bluebird** · 07-20-2006, 11:26 AM

If I remmember correctly EPP's camaro was running 15# on their stock motor demo car, although no one will recomend that you do the same. They where trying to run the engine until it blew then go with forged internals. It dynoed 540hp on a mustang dyno. Here is the link to the build although I think the car has gone throuhg some changes since then: http://www.exoticperformanceplus.com...Car.php?car=12

May be Bob can chime in!

**Packy** · 07-20-2006, 04:42 PM

Yeah, 15 lbs. is about the max you can push on the D-1sc. I have heard of some overspinning it a bit for more but you would be better off running more timing and race gas instead of overspinning the blower IMO.

**z28misfit** · 07-21-2006, 10:40 AM

I heard some people say I can keep my G5x4. I dont want to loose the aggressive idle the car has now. If I absolutely have to change cams, can I still get one that lopes like my cam does now?

**Killer_bluebird** · 07-22-2006, 12:27 AM

Originally Posted by z28misfit

I heard some people say I can keep my G5x4. I dont want to loose the aggressive idle the car has now. If I absolutely have to change cams, can I still get one that lopes like my cam does now?

It depends on the LSA and the duration of the cam. I imagine the duration may be a bit bigger than what would be optimal for an FI car but it may still be ok. Now you really want something with 114 or more LSA, so if your cam is 110 or 112 you would probably endup bleeding good amount of the boost due to the overlap. Again I don't think Lou publishes the specs on that cam so it is hard to be sure.

If anything we can trade cams.

**z28misfit** · 07-31-2006, 11:19 AM

what cam do you have?

**GA Country Boy** · 08-03-2006, 11:27 AM

My cam has 114 LSA and I have also reduced my compression ratio to 8.4 by changing the heads. My completely stock motor had no problem putting down 455 rwhp with a P1SC at 7 lbs boost. Believe it or not P-1SC's are rated up to 2300 hp, but I would imagine you would have to be spinning them pretty good to get there. When I went to a forged motor I chose to upgrade my P-1SC to a D-1SC which Procharger says is good to 20psi which is more than I intend to produce. Anyway, a D-1SC at 11-12 lbs of boost with an eight-rib belt, lower compression heads and a good tune should put down around 640rwhp and 609lb-ft of torque. I'm going to install a smaller pulley tomorrow because I'm not producing enough boost to attain the aforementioned numbers and will probably get on the dyno on Saturday.

**z28misfit** · 08-17-2006, 12:00 PM

Even if I decided to get rid of my g5x4, could someone still custom grind me a cam that works well with the supercharger and idle like my g5x4 does?

**FasstChevys** · 08-17-2006, 01:30 PM

Originally Posted by z28misfit

Even if I decided to get rid of my g5x4, could someone still custom grind me a cam that works well with the supercharger and idle like my g5x4 does?

Bob with EPP recommended the Lingenfelter GT23 camshaft for my WS6, 8 psi ProCharged car. I trust him.

He also said I'd put down approximately 500 hp to the wheels with the 8 psi set up with that camshaft.

**GA Country Boy** · 08-17-2006, 01:51 PM

Originally Posted by z28misfit

Even if I decided to get rid of my g5x4, could someone still custom grind me a cam that works well with the supercharger and idle like my g5x4 does?

I don't know what a g5x4 cam is or who makes it, but there are a bunch of reputable companies that make cams like Crane, Lunati, Comp, Isky etc.
You have to decide what level of performance you want and if you want
something like what you have don't bother changing cams or get something with numbers close to what you have.

If you want to run mid-teens boost, you'll have to have less than 9:1CR. ATI suggests 8.5:1 to 9:1 for up to 10psi http://www.procharger.com/bebs.shtml. That suggests for 12-14psi boost you'd be closer to 8.5:1, or lets say maybe...8.65:1CR....hmmm?.... just so you're not at the absolute bottom CR. ATI also suggests a split duration cam of 112-116 LSA. Gee, a 114LSA cam is right in the middle. Of course a cam like that deserves a set of blower heads with hogged out exhaust ports.

**GA Country Boy** · 08-17-2006, 02:45 PM

Originally Posted by FasstChevys

Bob with EPP recommended the Lingenfelter GT23 camshaft for my WS6, 8 psi ProCharged car. I trust him.

He also said I'd put down approximately 500 hp to the wheels with the 8 psi set up with that camshaft.

Which model Procharger are you running and how much are you putting down?

Taken from WWW.Lingenfelter.com:

"Lingenfelter GT2-3 LS1 Camshaft & Spring Kit Lingenfelter offers one of the best STREET camshafts available for the LS1 engine. The Lingenfelter GT2-3 camshaft will produce excellent power and still have a smooth idle for automatic or six speed manual transmission equipped vehicles. Tests have shown 25-30 HP improvements over factory LS1 camshafts.
Suggested in 350-427 CID applications
Camshaft specifications: 207/220 573/.580 w 1.7 rocker 118.5 CL. Kit includes GM LS6 valve springs #12586484 which use the stock factory LS1 valve spring retainer. Camshafts ground by Competition Cams for Lingenfelter."

BUT I think Lingenfelter's GT1 Cam would be better for a BLOWER CAR. Here are the specs: LS1-GT1-1 229 / 242 .631" / .631" 114 CL
Again it depends on whether you want performance or a mildly modded car.

**FasstChevys** · 08-17-2006, 03:21 PM

Originally Posted by GA Country Boy

Which model Procharger are you running and how much are you putting down?

Taken from WWW.Lingenfelter.com:

"Lingenfelter GT2-3 LS1 Camshaft & Spring Kit Lingenfelter offers one of the best STREET camshafts available for the LS1 engine. The Lingenfelter GT2-3 camshaft will produce excellent power and still have a smooth idle for automatic or six speed manual transmission equipped vehicles. Tests have shown 25-30 HP improvements over factory LS1 camshafts.
Suggested in 350-427 CID applications
Camshaft specifications: 207/220 573/.580 w 1.7 rocker 118.5 CL. Kit includes GM LS6 valve springs #12586484 which use the stock factory LS1 valve spring retainer. Camshafts ground by Competition Cams for Lingenfelter."

BUT I think Lingenfelter's GT1 Cam would be better for a BLOWER CAR. Here are the specs: LS1-GT1-1 229 / 242 .631" / .631" 114 CL
Again it depends on whether you want performance or a mildly modded car.

D1........and it's never been dynoed. Bob with EPP said I should use the Lingenfelter GT2-3 cam. Define a "performance" car, or "mildly" modded. Mine runs in 11's now without the cam upgrade. You tell me?

msb184 · 08-17-2006, 06:12 PM

Originally Posted by z28misfit

I have a 99 z28 and would like to run a pro charger
Current mods G5x4 cam
FAST90mm intake and throttle body
slp 85mm maf
slp underdrive(pretty sure this will have to go)
pacesetter race headers and y pipe
loudmouth
4.10 gears
Rebuilt tranny rated to 600 or so hp
spec stage 3 clutch
Current hp is 412rwhp.

I would like to put heads on this car and possibly rebuild my bottom end.
Which pro charger kit should i consider(this is not a daily driver)

The D1SC would be good. Save some$$ & just buy the head unit from ATI. The rest of their kit is poor.1) The rubber hose is very hard,replace with silicone 2) the clamps are cheap rad. hose type,get T-BOLT clamps 3)the mount is just bad,weak with alignment probs.etc. I use an ECS10 RIB on a very well made kit from ECS. You don't need a 10 RIB but an 8 RIB would be a big step up from the 6 RIB in the std. kit. They are very nice people & very helpful. Best machine work I have ever seen. ON the heads ,you might look at ET . The deck is .800 thick vs. .350 stock. I use the 265 cc runners but they make them fron 215 cc up. I did not see cu. in. you have but 225 is popular with lots of people. The size of the motor is the most important consideration(along with intended use) for everything. The parts I mentioned are on a 427 that is fairly stout with 18 psi boost etc. Vendors are helpful(most) but ECS has been the best for the 3 LS motors I've had. GOOD LUCK !! p. s. CAM MOTION does nothing but custom cams & they are highly regarded by hard core racers & st. guys alike. also- real nice folks.

**GA Country Boy** · 08-17-2006, 06:49 PM

Originally Posted by FasstChevys

D1........and it's never been dynoed. Bob with EPP said I should use the Lingenfelter GT2-3 cam. Define a "performance" car, or "mildly" modded. Mine runs in 11's now without the cam upgrade. You tell me?

Sorry didn't mean for anybody to get their nose out of joint. You're doing good running 11's. You should get it on the dyno and see what you're putting down,
because ET's alone don't tell the whole story. I have a friend who's putting down
425rwhp (175rwhp less than me), but ran the 1/4 faster at 10:58/125.45.

As to the cam, compare the specs of the two, and read what Procharger recommends. If you're not going to believe the people who make your blower,
who are you going to believe?

**z28misfit** · 09-12-2006, 10:30 AM

If I have the money this coming summer, I'll probably buy the D1sc. I know my cam is not optimal for it but I want more power than I have. I also want to see how much boost my stock bottom end can take before it decides to blow.