Ericdm

iTrader: (1)

I have a jasper crate motor rebuilt stock for the most part i am upgrading to a ported intake manifold with smoothed runners, and a 54mm bore i was wondering what kind of horse power increase i could expect with the ported intake and 54 mm throotle body? My car also has headers and intake. thx for your help

19mike84

well you might not get too much if your running stock un ported heads still. by the way if you dont mind me asking how much did the engine cost? im looking to get a stock rebuilt long block in the future

StealthFormula

iTrader: (35)

Next to nothing since your running stock untouched heads and a stock cam.

Ericdm

iTrader: (1)

the jasper motor the owner before me had installed the motor was 3000. It is not my block rebuilt it is a jasper crate motor i dont know the specs on it but it goes pretty good. I have intake exhaust, 373 gear. msd everything. underdrive pulley bbk headers no cat. tb bypass and airfoil. if i dont gain much hp will i atleast get a sweet sucking noise from the 54mm tb and ported intake? The tb is supposed to flow 880 cfm with airfoil ported to match and the stock 48 mm only flows 620 cfm.

Formula350

iTrader: (3)

Stock intake TB bore is already 54mm (some say 52, but I'm pretty sure it's 54 in actuality). Unless you mean you're getting a 54mm TB.

Stock TB is good till 450~ HP, which you won't be making unless you're tossing on a supercharger.

(No, my 58mm in my sig isn't installed)

93z28_6spd

iTrader: (1)

ya i agree with stealth... until you get those heads and intake breathing(at least gasket matching) you wont see a real big gain.. but you have to start somewhere

Ericdm

iTrader: (1)

the intake manifold is gasket matched and the rest of the intake is ported and polished all the way through i guess he means the runners by all the way through? i thought stock bore is 52mm?

Formula350

iTrader: (3)

Well, like I said, it's a bit of a debate. Some say 52, some say 54, but we all agree that a 52mm fits on a stock intake w/o any porting needed to be done.