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Hi all. Got my 2001 Trans Am tuned today at RPM in Garner, NC and I'd like to start off by saying the guys were very knowledgable and nice. The shop was filled with GM products making great power.
My set up is a 383 with TSP crank, TSP 6.125 rods, Wiseco -3cc pistons, our Stage 1 LS6 heads milled .030. (60cc). Compression is at 11.74:1.The cam specs are 244/248 .612/.615 on a 112° LSA. With Racetronix 42lb injectors, stock LS6 manifold and tb. QTP long tubes, cats and magnaflow exhaust. 6speed car with the 10 bolt.
The car made 449rwhp on the base tsp tune. After tweaking, Chris brought it up to 460 and vastly improved the cars driveability. I know I'm leaving power on the table in the manifold, but I don't know if 15hp is worth $1,500 at this point.
A fast 102 should net closer to 25-30rwhp over the ls6. Don't forget, you can recoup an easy 400+ for your current intake setup. Are you running a 1 7/8 header?
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Rpm did my tune also where do u live at maybe close enough to meet at a track one day
I am in Wilmington, NC. Closet track here is Coastal Planes.
Originally Posted by Sales2@Texas-speed
A fast 102 should net closer to 25-30rwhp over the ls6. Don't forget, you can recoup an easy 400+ for your current intake setup. Are you running a 1 7/8 header?
I think I'm going to do the intake upgrade with a Nick Williams TB soon. I was expecting mid 400 numbers but 470-480 is a decent pickup. My only thought is that my heads may not be able to take full advantage of a 102. I was thinking maybe a ported 92. That also allows me to keep my rails.
A fast 102 should net closer to 25-30rwhp over the ls6. Don't forget, you can recoup an easy 400+ for your current intake setup. Are you running a 1 7/8 header?
I am running 1 7/8 but I have cats and I'm running through a magnaflow. I have an electric cutout, just haven't had it installed yet.
Nice to see similar setups. You definitely have lots of potential for more power. What I notice in the graph is how early the tq gets up there & how it starts to drop at about 4750rpm. That cam, with 22* of overlap, should carry further IMO. How high did you spin it or plan to spin it?
What I feel the restrictions would be: First, of coarse, the intake manifold. Your exhaust. I'm also thinking from the header back. Not really the headers themselves. If you have cats & the magnaflow cat back, with no cutout, that thing is choking.
I'm about to get my 92 back from Mamo & we'll see how much a 383 likes it.
OP, your dyno graph is very similar to mine. Once I added the larger headers, I made a lot more lower RPM power and torque, but power dropped off at a lower RPM than it did before with the smaller headers, and pretty much nosed over past 6,000 rpm's. Over-scavenging is what Brian Tooley and Martin Smallwood think it is.
Nice to see similar setups. You definitely have lots of potential for more power. What I notice in the graph is how early the tq gets up there & how it starts to drop at about 4750rpm. That cam, with 22* of overlap, should carry further IMO. How high did you spin it or plan to spin it?
What I feel the restrictions would be: First, of coarse, the intake manifold. Your exhaust. I'm also thinking from the header back. Not really the headers themselves. If you have cats & the magnaflow cat back, with no cutout, that thing is choking.
I'm about to get my 92 back from Mamo & we'll see how much a 383 likes it.
What heads and cam setup are you running. I was debating a 92 over a 102 as well.
08-02-2016, 09:58 PM
TSP 383 dynoed today at RPM in NC 
