fresh rebuild
lg4 .30 over
mellings 204 214 cam
heads cleaned 3 angle valve job
jegs hei dizzy
non cc q-jet
open element air cleaner
all smog delete and ac delete
stock alum intake

exhaust, right now (stock manifolds with the emisson tubes blocked off small exhaust cherry bomb muffler dumps below pass seat)

 

Really there aren't any performance add ons, except that mild cam. Maybe 160hp up from 145hp. Exhaust is desperately needed.

 

how much would long tubes add?

 

depends but i would guess 20-30 HP it isn't going to be a miracle cure...you should get a new intake and gears... then you will be cooking with gas...

 

Put on an exhaust and ditch those crappy cherry bombs, they're restrictive. You'll pick up some torque with a good set of headers, a 3" headpipe, & 2 1/2" tailpipes on a 305ci. Look up Chevy High Performance's 305 Camaro build-up...They did it a few years ago. I think they got about 300hp and 345 lbs TQ outta it. I'm just gonna go with more cubes ala SBC 400ci, he,he,he!

 

right now the car has 3.23 non posi in it. i would like to get a diff intake and carb one day but right now im looking at exhaust

 

I got a little more pep outta mine with the Edel 3701. I'm running my smog stuff. Pulling it won't give me any noticable power difference, just worse gas mileage. I gotta pass Mass smog too. I barely passed with only 79k miles and a few mods. Roller Dyno smog checks are a PITA. CHP's 305 was also smog legal with the CCC Q-Jet, (rebuilt w/ better rods).

 

Exhaust is the single biggest improvement you can make.
headers and full 3", and a dynomax or some good flowing muffler can gain 40HP. Yep, stock manifolds and dinky exhaust is THAT bad.

The intake and carb aren't much of a restriction.

Since we have no idea what car you have, we can't take a guess at what gears are in it. Why don't you go ahead and make use of the sidebar to put in some car info?

 

I think the 3" all the way might be too much for a 305, you might gain a little HP @ high RPMs but its a 305. Torque would be better with a little back pressure from the 2 1/2's..JMO

 

my car is a 83 trans am with a 700r4 and i know that it has 3.23 non posi(pulled the code of the rear end.

 

I disagree. You won't "gain" anything from additional backpressure.

 

what would be better to get long tubes or shorties

 

Shorties are easier to fit in, usually cheaper, and easier to do single exhaust with

 

i would like to hear how a cherry bomb is restrictive... i mean a real cherry bomb... it is a straight through glasspack... no baffles... a 5in. exhaust with a massive muffler will be more restrictive than 2 cherry bombs off of a set of longtubes... might not be the quitest but it will sure scare the living **** out of any import

 

most cherry bombs that are... lets say 2.5" neck down to 2" inside. So you've got a 2" restriction. If you use a 3" cherry bomb (lets say it necks down to 2.5") on an otherwise 2.5" exhaust, you're fine.

 

i just got a set of cherry bombs... $19.25 with the 3-bolt flange... they didnt plan on anyone running just these off a set of headers did they...

i didnt notice any decrease in ID ah i bought the 4in body which has a 3in ID the 3in body has a 2 1/4 ID

cherrybomb also has thier header mufflers those look kinda small only 2 1/4 id out... seems kinda point less but it might not be that bad