How much hp?
Thread Starter
Instructor
Joined: Nov 2005
Posts: 198
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From: Lake Charles LA
How much hp?
I have a 98 coupe, I'm adding 243 heads, mti x1 cam, ls6 intake, underdrive pulley, long tubes, high flow cats, exhaust, varaam, and having mti tune it. How much can I expect at the wheels?
Le Mans Master
Joined: Aug 2003
Posts: 9,298
Likes: 4
From: American Canyon Lethal Injection
I'm at 376 RWHP with a A4 tranny, 224/224 .567/.567 LSA 114 stock 243 heads, LS6 intake, LT headers, UD pulley, Blackwing with a Halltech airbridge. Gonna be installing Patriot's 243 heads milled to 62cc. Goal is 400RWHP.
Melting Slicks
Joined: Nov 2002
Posts: 2,884
Likes: 260
From: Jamison Pa
St. Jude Donor '11-'25
MTI R1 Cam =420RWHP
I had a similar setup.
243 heads that were lightly ported and milled .006
GM MLS Head Gaskets
LS6 intake
U/D Pulley Dynamaxx headers
MTI R1 cam (232/236)
Comp 918's and 875-16 lifters.
Vararam
M6 with 4:10's
I got 420 RWHP. The 4:10's made the readings a little lower that if I had left the 3:42's in, but that's only on paper!
ECS did the tune.
Bob K.
243 heads that were lightly ported and milled .006
GM MLS Head Gaskets
LS6 intake
U/D Pulley Dynamaxx headers
MTI R1 cam (232/236)
Comp 918's and 875-16 lifters.
Vararam
M6 with 4:10's
I got 420 RWHP. The 4:10's made the readings a little lower that if I had left the 3:42's in, but that's only on paper!
ECS did the tune.
Bob K.
Pro
Joined: Jan 2005
Posts: 559
Likes: 1
From: Lenexa Kansas
I recently added all the goodies you mentioned with a 224/224 .581/.581 on a 112 with Stage 2.5 5.3 Liter heads. Needless to say, a bit smaller cam, and probably heads that flow a little less than yours. I hit 410whp/390 torque. I would think you should hit a good 420 or maybe a bit more? I think the 4.10's should knock a bit off, as I have heard the lower rear ends lose a bit more... Ok, put me down for 425 at the wheel, if you are MN6. Maybe 415 with an auto. Did you do a baseline? I jumped 93whp from only a Vararam to the setup above. Good luck, man! You are going to love 400+ at the wheel!!! 
Pro
Joined: Jan 2005
Posts: 559
Likes: 1
From: Lenexa Kansas
Le Mans Master
Joined: Aug 2003
Posts: 9,298
Likes: 4
From: American Canyon Lethal Injection
That's my goal also. I'm close to 380 now and with the install of the 243 milled heads to 62cc, so my tuner said 400+ for me after the install. Good luck to you
