new 383
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Joined: Dec 2010
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From: South Carolina
new 383 Ok, after almost a year of collecting parts to build a new engine for my completely stock 01 Trans Am, I finally saw the fruits of my labor today. I put together a 383 LS6 stroker with LS6 heads (2.5 port), Fast 90/90 (intake ported and matched), 234/239 598/605 114 +1 cam, QTP headers and Kooks true duals (worked like a charm with the QTPs with minimal mods). Started it last night and took it to get tuned today. On a Mustang dyno, the 1st pull was 442, second was 453 with more timing, and the third was 485 with more timing. I was pleased since he had the exact same combo in a vette earlier in the week that came in at 420.
The Kooks exhaust sounds awesome although they are a bit loud for my taste. I might add some cats or resonators at some point but it looks great and apparently performs based on the numbers. I took the car for a spin after the tune and it has some serious get you sideways in a hurry power. I like it. :-)
The Kooks exhaust sounds awesome although they are a bit loud for my taste. I might add some cats or resonators at some point but it looks great and apparently performs based on the numbers. I took the car for a spin after the tune and it has some serious get you sideways in a hurry power. I like it. :-)
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Joined: Aug 2010
Posts: 462
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From: houston, texas
oh yeah. get a set of gears in it.....totally different animal. if i did it all over again i would probably go with 3.9x's rear gears. already turning 121mph with junk sumitumo's. oh well though. nice numbers. any vids of the kooks exhaust?
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my compression is right around there to. i have stock 243s and a fast 90/90, 1 7/8 lts but my cam is ginormous. 240/256 .647/.647 111lsa eps lobes. im hoping to be putting down similar numbers
471/467 with my 383 AFR 205 heads, LS6 intake, stock TB, 238/240 cam through a 10 bolt. plan on losing some through a new 9 inch, but also look to bring the numbers back up with a 90/90 combo. enjoy the car
And this is why I think the 383 fwiw is the ultimate budget/STREET/strip motor. With a cam that is in the high 230's low 240's duration and .610-.630 lift with a good set of aftermarket heads or cnc'd 243's you can make almost 500rwhp or 500rwhp with 470+rwtq. Now that my friends makes for one fun ride that will idle, cruise with the a/c on and then go run a 10.x 1/4 time after bolting the D/R's on and then drive back home with the a/c and tunes on.
Very true. I do wish that my cam was a bit bigger and more aggressive. Driveability was a concern @ the time and unfortunately now it is money. Down the road I may decide to change the cam and get some better heads to obtain my goal of 500/480 N/A.
For now the Nitrous is being readied and should make it more of an animal than it already is.
For now the Nitrous is being readied and should make it more of an animal than it already is.
Stroked 383 here, trickflow 215's Kooks 1 7/8's Fast 102 with 96mm TB, and a tiny baby cam because I have a stock converter with an RPM level 5! I put down 453 and 456 on a dynojet. I ran a 12.08 on street tires with a 1.9 60' spinning most of the way. I also balloned the converter and broke the flexplate, Car is currently at vengeance doing a 6 speed conversion and putting at least a VRX5 cam in now!!