A few Procharged L92/LS3 questions...
Thread Starter
Joined: Jan 2008
Posts: 8,184
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From: Orange County, CA
A few Procharged L92/LS3 questions... I made a deal with a buddy for a 6.2 long block. I have a few questions concerning my boost build options.
I already have a Holley 90mm TB, Kooks 1 7/8x2" header with 3.5" collectors, 3.5" to 4" merge, and a 4" cutout.
1) What boost specific cam should I go with? I know LS3/L92 heads are picky when it comes to cams...
2) The heads have the solid valves, I will be using Patriot .660 Extremes dual springs. I don't plan to rev past 7k. Depending on the cam selection, should I be worried about valve float with the heavy valves?
3) I know the L92/LS3 heads don't have the optimum deck thickness for boost, but I am only planning on running 9-10psi of boost. Will the stock LS3 4.065" MLS head gaskets and ARP head studs work for my build? Anyone know the ARP part number off hand?
4) I am torn between getting a LS3 intake manifold or getting an Edelbrock L92 EFI Victor JR intake. I know I am not boosting a lot, but what would you guys recommend?
All help is greatly appreciated, thanks.
I already have a Holley 90mm TB, Kooks 1 7/8x2" header with 3.5" collectors, 3.5" to 4" merge, and a 4" cutout.
1) What boost specific cam should I go with? I know LS3/L92 heads are picky when it comes to cams...
2) The heads have the solid valves, I will be using Patriot .660 Extremes dual springs. I don't plan to rev past 7k. Depending on the cam selection, should I be worried about valve float with the heavy valves?
3) I know the L92/LS3 heads don't have the optimum deck thickness for boost, but I am only planning on running 9-10psi of boost. Will the stock LS3 4.065" MLS head gaskets and ARP head studs work for my build? Anyone know the ARP part number off hand?
4) I am torn between getting a LS3 intake manifold or getting an Edelbrock L92 EFI Victor JR intake. I know I am not boosting a lot, but what would you guys recommend?
All help is greatly appreciated, thanks.
http://www.exoticperformanceplus.com...Car.php?car=59
Take a look at the power we made with this LS3 with our blower camshaft.
I don't see a problem with your valves to 7k.
The heads will be just fine, we're pushing much more boost out of this LS3 Hummer. http://www.exoticperformanceplus.com...Car.php?car=56
ARP head studs http://www.exoticperformanceplus.com....html?item=721
With the power increases we have seen with the newer FAST intakes, you might want to consider one. http://www.exoticperformanceplus.com...html?item=1703 Bob
Take a look at the power we made with this LS3 with our blower camshaft.
I don't see a problem with your valves to 7k.
The heads will be just fine, we're pushing much more boost out of this LS3 Hummer. http://www.exoticperformanceplus.com...Car.php?car=56
ARP head studs http://www.exoticperformanceplus.com....html?item=721
With the power increases we have seen with the newer FAST intakes, you might want to consider one. http://www.exoticperformanceplus.com...html?item=1703 Bob
Thread Starter
Joined: Jan 2008
Posts: 8,184
Likes: 28
From: Orange County, CA
http://www.exoticperformanceplus.com...Car.php?car=59
Take a look at the power we made with this LS3 with our blower camshaft.
I don't see a problem with your valves to 7k.
The heads will be just fine, we're pushing much more boost out of this LS3 Hummer. http://www.exoticperformanceplus.com...Car.php?car=56
ARP head studs http://www.exoticperformanceplus.com....html?item=721
With the power increases we have seen with the newer FAST intakes, you might want to consider one. http://www.exoticperformanceplus.com...html?item=1703 Bob
Take a look at the power we made with this LS3 with our blower camshaft.
I don't see a problem with your valves to 7k.
The heads will be just fine, we're pushing much more boost out of this LS3 Hummer. http://www.exoticperformanceplus.com...Car.php?car=56
ARP head studs http://www.exoticperformanceplus.com....html?item=721
With the power increases we have seen with the newer FAST intakes, you might want to consider one. http://www.exoticperformanceplus.com...html?item=1703 Bob
Also what length pushrods did you end up using?
I have been looking into the FAST 102, but it sure is pricey.
EDIT: I would be happy with anything over 600rwhp for this build to start. I feel that is a safe number for a stock 6.2 bottom end. It seems in your thread that the car peaked at 671rwhp with maxed timing is that correct? Would you have a guess as to what psi would help me achieve my goal?
EDIT2: I forgot to ask what belt system did you go with 6/8/cog/flit drive and did you have any belt slippage issues? I have the standard Fbody J-bracket with the Chevy Chad mod (extra pulley machined onto one of the standoffs for increased belt wrap) but I only have 6 rib pulleys as of now.
Last edited by ss.slp.ls1; Mar 18, 2010 at 11:48 AM.
I have a 3.70 6 rib blower pulley if your interested. Procharger sent it to me on accident instead of the 8 rib. I suggest switching to an 8rib setup. The 6rib might be fine for a little bit but start piecing out a 8rib setup. The difference in cubes and flow you might try a 3.70 blower and a 7.65 crank pulley. Also, which dampner are you going with?
Thread Starter
Joined: Jan 2008
Posts: 8,184
Likes: 28
From: Orange County, CA
I have a 3.70 6 rib blower pulley if your interested. Procharger sent it to me on accident instead of the 8 rib. I suggest switching to an 8rib setup. The 6rib might be fine for a little bit but start piecing out a 8rib setup. The difference in cubes and flow you might try a 3.70 blower and a 7.65 crank pulley. Also, which dampner are you going with?
Which J bracket are you using? The stock procharger one should be fine for your goals. Whos going to do the tune? Ryne from CMS does all mine and my car runs pretty well. Let me know if you need the pulley because another member is interested in it.
Thread Starter
Joined: Jan 2008
Posts: 8,184
Likes: 28
From: Orange County, CA
I have the stock J-bracket but one of the stand offs has been machined down to include another pulley for increase belt wrap around the supercharger pulley.
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I was thinking about using a 3.55 pulley, but I am not sure how to calculate estimated boost levels by pulley size.
Its still going on a stock bottom end 6.2. His goals are over 600 to the wheels, but as reliable as possible. Your right, blower rpm wont be an issue though. I'm just mentioning you dont want to make to much boost lol
Thread Starter
Joined: Jan 2008
Posts: 8,184
Likes: 28
From: Orange County, CA
Well I'm still new to superchargers, I don't know what pulley I should go with.
