[terribleonexx88]

why do you lose power when switch to carb? will a tall runner manifold give the low end torque like an efi manifold? or even tall runned with 2 four barrels?

[Mr_Evil]

You wont lose power if you get the parts to make more HP. You can gain power by getting less restrictive parts that are more tunable. Cant tune with stock EFI, and throttle bodies are small.

[TENGRAM]

Originally Posted by terribleonexx88 why do you lose power when switch to carb? will a tall runner manifold give the low end torque like an efi manifold? or even tall runned with 2 four barrels?

i've heard that before, but in my own experience it wasn't true. my 85 with weiand intake and holley 600cfm carb had more torque than my current 89 stang.

[TENGRAM]

Originally Posted by Mr_Evil You wont lose power if you get the parts to make more HP. You can gain power by getting less restrictive parts that are more tunable. Cant tune with stock EFI, and throttle bodies are small.

sure you can tune a stock efi. timing is as simple to change as a carbed car's timing, and, with o2 sensors disconnected, fuel pressure changes (ok you need an adjustable fuel pressure regulator...$40) actually make a difference. i also disagree about the TBs. the 60mm TB is enough for a pretty good amount of power. IIRC, some have gotten 300hp or more with them...now the 55mm MAF, thats a different story. but carbs are alot cheaper to upgrade. compare efi intake ($300), TB ($150+$50 egr spacer), and MAF ($150) to carb and intake package from summit for about $300. $650 vs $300, carbs rule. plus they're easier to maintain. all the sensors, actuators, and extra wiring of an efi car will sap you dry in maintenance costs.

[terribleonexx88]

well hopefully ill be gettin a reman long block from ford and im considering carb but alotta people on here say carb will lose power. my ultimate goal is to have a clean, simple, engine compartant(like the idea of carb sitting on a tall manifold) but i only wanna gain power not loose any


reman long block + carb and manifold = hp,tq?

[TENGRAM]

Originally Posted by terribleonexx88 well hopefully ill be gettin a reman long block from ford and im considering carb but alotta people on here say carb will lose power. my ultimate goal is to have a clean, simple, engine compartant(like the idea of carb sitting on a tall manifold) but i only wanna gain power not loose any reman long block + carb and manifold = hp,tq?

if you don't have emissions testing then definitely go with a carb. as for hp/tq, ballpark figure, 250hp max.

[terribleonexx88]

is 250hp max because of stock heads

[1slo5.0]

Typically on a stock or mild engine EFI will make more torque and power across the rpm range. Peak horsepower might be a bit higher with a carb but over all you will see a loss.....on a dyno anyway. On stuff that is more heavily modified it is easier to go faster with a carb. There are guys making big numbers with aftermarket EFI systems but you have to find someone that can tune them. On a car that is mostly a street car I'd never take the EFI off. Been there, done that, won't ever do it again.

[Mr_Evil]

If the heads were that restrictive there would be no need for small exhaust, catalytic converters, & a small throttle body.

[TENGRAM]

Originally Posted by Darrell Typically on a stock or mild engine EFI will make more torque and power across the rpm range. Peak horsepower might be a bit higher with a carb but over all you will see a loss.....on a dyno anyway. On stuff that is more heavily modified it is easier to go faster with a carb. There are guys making big numbers with aftermarket EFI systems but you have to find someone that can tune them. On a car that is mostly a street car I'd never take the EFI off. Been there, done that, won't ever do it again.

it seems like everybody has different opinions of carbs on street stangs...alot of people i suspect go too large for the carb, everyone wants to say "i have a holley double pumper", but with mine i went smallish. box stock, no tune at all 600cfm 4160 series (IIRC) and weiand action plus. maybe the high altitude is alot of the problem others seem to have but here in TX it was perfect right from summit. the part-throttle performance was leaps and bounds ahead of my efi setup. maybe you're right about the tq on a dyno but part-throttle was amazing, hence my perception that tq was better

[TENGRAM]

Originally Posted by Mr_Evil If the heads were that restrictive there would be no need for small exhaust, catalytic converters, & a small throttle body.

??? not sure what you're trying to say here . FYI, the heads are very restrictive, but the air silencer, MAF, and lower intake are the most restrictive, followed closely by the stock 4-cat h-pipe. without changing heads 250 is likely the most you'll get out of it. with ported "thumper" E7s (ported stock heads) the most i've ever heard of anyone getting is 285hp (obviously without power adder)

[1slo5.0]

Originally Posted by Mr_Evil If the heads were that restrictive there would be no need for small exhaust, catalytic converters, & a small throttle body.

WTF are you talking about?