i own an 89 gta. i am building a new 355 for it. i was wondering if anyone with a similar setup could let me know what to expect 1/4 mile wise. it is 10.5:1 compression, .458/.472 212/218 duration @ .050, vortec heads, mini ram or lt1 conversion(can not decide which yet), hooker super comp headers, crane stamped steel roller rockers, bbk 52mm throttle body, 24# injectors, underdrive pulleys, msd 6al, 2 1/2 y-pipe to a single 3 inch pipe super 40 flowmaster, 2200 stall, 3.73 gears. i know that exact info can not be given and i am sure that someone will tell me to get it done and take it to the track but i know someone has a similar setup and i just want to know if i will be happy or do i need to change somethings around.

 

mid 12s would be my guess.... I would almost say low 12s are there....

-Terry-

 

needs more converter. id go with about 3000 stall.

 

See my signature. I'm not a fan of the Flowmaster muffler for performance. With a little more tweaking I expect to get into the 12.5's by the end of the year. Allen

 

i think you could use abit more converter.... like 2800rpm stall or even 3000.

also think that a slightly bigger cam could work better with the miniram/Lt1 intake style but not sure the vortecs would fit well with that. miniram likes to breath. flows well up over 5500rpms and that cam is about 5000-5500rpms so it will work nicely but you could go bigger... depends on what your looking for, how street friendly you want it to be, and how much gas you want to save, etc...

vortec heads have been proven to flow well enough to get 12's but they dont like lifts higher than .450 inches. that cam will be nice on the street tho, very friendly and be good for a daily driver.

the setup you got now sounds fine tho for a mid higher 12 second car with the right suspension setup. should be very streetable and run very respectable times. it all comes down to your tune.... that could mean the difference of a 13.0-13.1 second car and a 12.8 second car... dont be upset that it only goes bottom 13's tho, thats very good for that combo, but i think that it should be high 12's, as long as your not at higher altitude

 

Thanks guys, I was hoping for the mid 12's and that is as fast as I will go in this car. Then I will build me a monster.