Thread: Big Block guys... step in...

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  1. #21 Re: Big Block guys... step in... 
    GTP Level Member BlownBigBlock's Avatar
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    My vette with the 468 and 4.11's and a 4 speed would do about 3250 at 60-65 mph, due to the motor being an LS7 it liked the RPM's and was "a lil sloppy" down low but then I didn't mind it, that was also with a 26 inch tire. The Camaro with the blown 447 I was running 31x18's with a 4.56 spool. You never stated (unless I missed it what tire diameter your running) will directly effect your true ratio. Sounds like it will be a fun toy when ya decide which direction you're going to go...
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  2. #22 Re: Big Block guys... step in... 
    Donating Users gtpsleeper's Avatar
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    did not state it as Im not sure yet on the wheel/tire setup that im gonna use (obviously slicks will NOT be it)...

    gonna have to do some research to figure out exactly how I want it...
    "My car is a racecar like Planet Fitness is a gym...."

    proud mark VIII victim!!! suck it...
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  3. #23 Re: Big Block guys... step in... 
    Donating Users alkygto's Avatar
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    Just drove the GTO yesterday for the first time this year. Saw this thread and thought I'd post. .040 over 427 Chevy w/671 on meth so it inhales fuel like a teenager on freon. 4 mpg I figure so I plan my trips carefully even with a 45 gallon fuel cell. That all said I used to run a 4 speed with 3:55's and 28" tire but now it's a Tremec TKO and 4:11's w/29.5" ET streets and on the highway, where the motor is "happy" around 2500 rpm I'm running about 75 mph and getting almost 6 mpg which is huge for me. I try to keep it under 70 on the highway though so I can aviod trouble. Bright Orange with a huffer sticking out of the engine compartment you are gauranteed to get noticed.

    Op if you are truly considering a manual tranny I would highly recommend the TKO, it strong and reliable, shifts like butter and wieghs 100 pounds less than the six speed as well as being less bulky. In my car I had to do a little modding to the tranny tunnel but nothing major. Automatics (especially glides) are great for bracket cars but for a fun street car there is nothing like shifting for yourself. My car was a factory 4 speed and I wanted to keep that "stock" vibe to the interior but with a radical motor. My car made 750 to the tire with the old setup and I've yet to hurt the TKO and it's a heavy car. Clutch choice is huge and I went with a Mcloed setup which I recommend calling them and telling them exactly what you are running for them to make a recommendation on what to run.

    1997 Pontiac Grand Prix GTP
    1969 Pontiac GTO
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  4. #24 Re: Big Block guys... step in... 
    Donating Users gtpsleeper's Avatar
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    Alky, where did you get your setup from?
    "My car is a racecar like Planet Fitness is a gym...."

    proud mark VIII victim!!! suck it...
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