Three inch exhaust for this? Sounds funny...

[RioRed94vert]

I know someone who just got an 88 lx notch and he doesnt really know much about cars. He has a short throw shifter, king cobra clutch, cold air, cobra intake, udpullies, longtube headers into 3 inch exhaust and dumped. My qeustion is that the 3 inch exhaust sounds like to much for a 5 liter with no internal mods like cam, heads and what not. I have a stock 96 gt 5 speed and we raced from a stop . He let off at about 25-30 and said that the "clutch slipped" I think he might be full of ****. Cause he definitly floored it and I pulled away in my stocker on 18'' rims. Is it possible that he is losing a ton of low end torque with that exhaust? He says it needs 3 inch exhaust, and i beg to differ. Sorry so long any input would be helpful.....

 

[poneypower89]

3 inch is overkill on that stock type motor.

I wouldnt think he would lost ALOT of power... but he definitely didnt gain any.

 

[srothfuss]

The only area where he gained any power was in the 6,000+ range with a stock style setup and 3" plumbing...

Maybe if it was supercharged it wouldn't be so bad but I bet that car is a dog off the line.

 

[5spd GT]

He probably doesn't have 3in exhaust and is judging that off his tips.

3 in. exhaust is definetly not needed until you get some big horsepower numbers.

I doubt his clutch is slipping. That King Cobra (assuming he has one) will hold up just fine for quite some time even under abuse with that power level.

 

[Euphoric306]

dang he must have 3" exhaust or be the worst driver ever, because his gt40 intaked 5.0 shoulda stomped your 4.6 sorry to say,

advise this guy to step down a notch on the exhaust, or just swap a 460 to match it

 

[KDK1988GT]

sounds a bit big if its all 3inch....

 

[BlackSaleenS281]

Hell the 3 inch on the fox body looks like **** to me anyways. Wayyyyyy to big, 2.5 is perfect.

 

[Mavrick]

The only area where he gained any power was in the 6,000+ range with a stock style setup and 3" plumbing...

Maybe if it was supercharged it wouldn't be so bad but I bet that car is a dog off the line.

:Word:

The heads would be a huge restriction at that RPM, so 3" exhaust would be useless in that sense anyhow..

 

[srothfuss]

:Word:

The heads would be a huge restriction at that RPM, so 3" exhaust would be useless in that sense anyhow..

Ah, good point! :Word:

 

[STANGateURlilSS]

3" exhaust is way way too big for a stock 5 liter.. hell i just finished doing exhaust for a customers 63 falcon.. w a blown 331 making 620hp at the wheels and its running 2.5" exhaust.. 3" exhaust is way too much for a stock 5 liter..

 

[85_SS_302_Coupe]

On a typical bolt-on engine, if you run 1 5/8 headers into a 2.5 inch mid pipe (X/H) and THEN into 3 inch exhaust, you'll pick up top end without sacrificing torque. Three inch from the headers back is overkill, but will still help top end, but you'll suffer loss of torque.

 

[Michael Yount]

" Is it possible that he is losing a ton of low end torque with that exhaust?"

Not only is it possible, it's entirely probable.

 

[Euphoric306]

oh man... blown 331 falcon

good thing i wasn't working on that or else he'd complain about a dried oil/coolant mix all over his car that couldn't be explained

 

[Michael Yount]

There, there Euphoric -- keep both hands on the keyboard, please....or go get some tissue for crying out loud.

 

[Euphoric306]

hehe my bad

my dad's first car was a 63 falcon, the pictures and stories made it kind of a love affair to the fox

 

[90mustangGT]

3" exaust? What is his total setup? It wouldn't make a big difference, maby a few lbs of torque down low would be lost but I doubt just an oversized catback would really effect anything to the point of getting smoked or winning.