408 build questions
Thread Starter
Teching In
Joined: Aug 2013
Posts: 10
Likes: 0
From: Decatur il
408 build questions hey guys im getting ready to start a build on my 01 trans am a4. i talked to derek at tsp about the build, i want to go with, 408 lq9 with prc 247 heads and texas giant cam. i already have the fast 92/92 and tsp lt 1 7/8. its going to get bolted up with a th400 and custom stall i havent had a chance to talk to anyone about yet. i would like to put a 200-250 shot on the car as well it wont be a dd its only for drag and to shut up some ppl in my town on the street. it will also be gutted and 9 inch put in with slicks. can i get anyone that knows about what kind of numbers ill be expecting or 1/4 et times. i would really want to be able to hit 9s? thanks for the responses guys.
Custom grind cam or no cam at all. You have an excellent short block with an excellent set of heads, and you're going to stuff an old as dirt shelf cam in it?.
Do yourself a favor and call Geoff@eps, patg, Martin@tick...whoever, and get a custom cam.
Do yourself a favor and call Geoff@eps, patg, Martin@tick...whoever, and get a custom cam.
On The Tree
Joined: Sep 2011
Posts: 161
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From: Georgetown TX.
My 408 with TFS 225s and a turbo 350 in a 3500 pound car ran 10.7s on motor and 9.80s with a 150 shot through a nitrous outlet plate. So I'd say that combo will reach your goals, and then some.
TECH Addict
Joined: Sep 2009
Posts: 2,481
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From: PA/MD
I ended up going with 12.5:1 static compression on my 408 with a 255/271 .624/.624 115 lsa cam which gave me a very pump gas friendly 8.22:1 dcr. Did have a 4l60e behind it with a 4, 000 stall and it sounded great and pulled hard as hell all the way to my 8, 000 rpm fuel cutoff.
If that helps.
If that helps.
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Verdad Gallardo TECH Addict
Joined: Sep 2009
Posts: 2,481
Likes: 5
From: PA/MD
I jave my fuel cut set to 8, 000 rpms right now...if I ever get the car on a dyno I might raise the the fuel cut to 8, 500 or even 9, 000 rpms if it is still making power.
Its not the engine size, but it's the parts you use inside it that determines the max rpms
Its not the engine size, but it's the parts you use inside it that determines the max rpms
On The Tree
Joined: Sep 2011
Posts: 161
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From: Georgetown TX.
I've run the times posted above with a 3.73, and a 4.10 gear. If you are going to be spraying a lot, the 3.73 is the better gear. Not sure of the rpm on the 150 shot, but I upped the shot to 250 for a while. It was running 9.60s @ 140. I believe it was turning about 7000 rpm through the trap's.
Thread Starter
Teching In
Joined: Aug 2013
Posts: 10
Likes: 0
From: Decatur il
I've run the times posted above with a 3.73, and a 4.10 gear. If you are going to be spraying a lot, the 3.73 is the better gear. Not sure of the rpm on the 150 shot, but I upped the shot to 250 for a while. It was running 9.60s @ 140. I believe it was turning about 7000 rpm through the trap's.
On The Tree
Joined: Sep 2011
Posts: 161
Likes: 0
From: Georgetown TX.
Moser 12 bolt. Like stated earlier, 3.73, and 4.10s. It had the Detroit Locker True Trac when I put it in, and I switched over to a spool later on. If your car is going to be track only, I suggest going with a spool from the get. They are cheaper, and lighter.