will i get more HP
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Instructor
Joined: Apr 2005
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will i get more HP
i have a 76 completely stock engine. i was wondering if i change out the intake & carb, if i would get any hp change. i would like to remove the EGR system. and is this a very hard job. the reason i'm asking is the edelbrock performance intake has a nice price. do you have any idea on what intake & carb would work, also i don't want to buy a new hood. height of new pieces need to be close. and one other thing do i have a electic choke. thanks for any help you can give
Melting Slicks
Joined: Dec 1999
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From: Mid West
Cruise-In III Veteran
On a 76 the most restrictive thing is probably the exhaust. I'd first change out the old catiletic (spelling??) converter and single exhuast system for a true dual pipe system with either high flow cats or no cats at all. Second I'd rebuild the carb, recurve the distributer, get a new coil, and a good set of spark plugs and wires. Its amazing what tuning can do for an engine. I've dropped 0.4 seconds in the 1/4 with just tuning before.
I tried the carb/intake swap years ago when I first got my 76 with little success. The engine just can't breath with that exhaust system on there.
I tried the carb/intake swap years ago when I first got my 76 with little success. The engine just can't breath with that exhaust system on there.
Race Director
Joined: Sep 2002
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From: San Diego - Deep Within The State of CONFUSION!
Jason's advice is right on
The very LAST thing you wanna do is admit even MORE air to the engine that already cannot eliminate the air it's getting currently.
RE: defeating EGR - why? you will get absolutlely no performance gain at all. It is a penalty-free emission system, just like a PCV valve.
Melting Slicks
Joined: Apr 2002
Posts: 2,337
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From: Norfolk VA
None of the above is difficult. The Edelbrock performer series intakes are good intakes. If you have a Q-jet carb stick with it
and have it rebuilt. If you feel you really have to change the carb, Im a fan of Demon carbs. The exhaust and ignition systems are also important. You can free up a few ponies
by modifying the exhaust, but dont expect much. The biggest culprit are those 76cc boat anchor cylinder heads. It is all a matter of how much you have to spend and/or willing to spend to go fast.
and have it rebuilt. If you feel you really have to change the carb, Im a fan of Demon carbs. The exhaust and ignition systems are also important. You can free up a few ponies
by modifying the exhaust, but dont expect much. The biggest culprit are those 76cc boat anchor cylinder heads. It is all a matter of how much you have to spend and/or willing to spend to go fast.
Melting Slicks
Joined: Jul 2004
Posts: 2,577
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From: Long Island New York
Originally Posted by Jason Staley
On a 76 the most restrictive thing is probably the exhaust. I'd first change out the old catiletic (spelling??) converter and single exhuast system for a true dual pipe system with either high flow cats or no cats at all. Second I'd rebuild the carb, recurve the distributer, get a new coil, and a good set of spark plugs and wires. Its amazing what tuning can do for an engine. I've dropped 0.4 seconds in the 1/4 with just tuning before.
I tried the carb/intake swap years ago when I first got my 76 with little success. The engine just can't breath with that exhaust system on there.
I tried the carb/intake swap years ago when I first got my 76 with little success. The engine just can't breath with that exhaust system on there.
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ok you guys talked me out out of changing the egr. but i have to start some where. you see if i change out the manifold & carb and it still isn't right, then my wife will let me change out the exhaust. if i say i need a new exhaust so i can install a new carb & manifold, just doesn't cut it. this kind of logic works really good on my wife. i was looking at getting edelbrock performer eps intake & thunder series 800 cfm or do you think the 650 cfm, would be more reasonable. by the way thanks for your input russ
Safety Car
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From: Jersey Shore Exit 98
Originally Posted by rodesmg
ok you guys talked me out out of changing the egr. but i have to start some where. you see if i change out the manifold & carb and it still isn't right, then my wife will let me change out the exhaust. if i say i need a new exhaust so i can install a new carb & manifold, just doesn't cut it. this kind of logic works really good on my wife. i was looking at getting edelbrock performer eps intake & thunder series 800 cfm or do you think the 650 cfm, would be more reasonable. by the way thanks for your input russ
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From: Arlington Va Current ride 04 vert, previous vettes: 69 vert, 77 resto mod
i think the original chevy intakes are pretty good, although they are heavy...you will loose weight by swapping it but i don't see you gaining alot more performance....i would go with the real improvements like the others guys said like getting headers and a free flow exhaust. secondly i would get new heads next .....this is where the improvements will come from..... i also believe that Qjet will give you all the performance you need for the short term.
Last edited by bobs77vet; Jan 2, 2006 at 10:33 PM.
Pro
Joined: Jan 2005
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From: Twin Cities Minnesota
Originally Posted by rodesmg
you see if i change out the manifold & carb and it still isn't right, then my wife will let me change out the exhaust. if i say i need a new exhaust so i can install a new carb & manifold, just doesn't cut it. this kind of logic works really good on my wife.
Melting Slicks
Joined: Mar 2004
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From: Lake Ozark, MO
You can find most of the parts your talking about on Ebay for way less than new prices...keep looking. You can always sell the leftover parts on Ebay to help offset the new/used costs. This is a good selling point for convincing the wife to let you spend the additional money.
Melting Slicks
Joined: Dec 1999
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From: Mid West
Cruise-In III Veteran
Originally Posted by rodesmg
.... if i say i need a new exhaust so i can install a new carb & manifold, just doesn't cut it. this kind of logic works really good on my wife. ....russ
.... oh honey, I wouldn't want you to breath those terrible fumes 
.
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i got a show quality edelbrock preformer off my stroker ill sell ya ! did you ever try vaccuming the carpet with the bag so full ,,the craps coming out?and your wondering why the dirt is not being picked up by the vaccume cleaner??cuz theres no vaccume its clogged ..well thats what your doing by not letting the engine breathe. thats why these guys telling you not to put the top end stuff in,, if it cant breathe it may run worse. those ponies arnt even be that much as if you would put the heads on ..the exhaust..then the intake and right carb..your gonna be foulin plugs in less than 500 mileswith a intake and a 850 holly and that exhaust you got... get it compressing more fuel / air(64 cc heads)which is gonna bump your compression up..and flowing intake and get it out fast ,,non restrictive exhaust and the ponies will then be noticed a nice cam wont hurt with some lift...i had a 750 double pumper on a 327 /350 hp 64 vette mtr when i was a 21 yr old kid and the plugs didnt last 500.. thats when i got the vaccume cleaner speech.put in a cam lifters intake smaller carb and shot my pants when i floored it!!!!!!!!!!!
Last edited by carl a; Jan 3, 2006 at 08:57 PM.
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Originally Posted by jetvette
Carl, I like your down-to-earth responses which generally parallel my own experiences. In case no one has told you yet today, you have a beautiful car.
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carl a
thanks for the offer, but the guys talked me into putting on true dual exaust,on first. i'm leaning towards mid america ss dual. i like to do as much work as possible on my own, thanks to everyone for the feedback
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thats what i meant fix your restrictive exhaust first,,to get the thing breathin ,,dont dump a bunch of fuel in first run worse like that 64 327/350 i had ,,, now that i think of it it was a 850 double pumper, stock intake,ect and the plugs were soaked and fouled in 500 miles i pulled the radiator out ,,and put in a cam,, crower anti pump up racing hydro lifters,,new intake smaller carb..headers.. adjusted the lifters 3/4 turn and ran totally different....i wish i still had that motor ,,, friend of mime has a 60's ,327, w/ a blown rod but its not thru the block he's giving me... i gotta get it and put tog one day when i get my new house and some room (a garage)
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carla tried a post yesterday,guess it didn't post. no thanks on intake, the guys on the fourm talked me out of it. i will be installing headers & true dual exhaust first. mid america has a nice price on exhaust and it bolts on a plus for me, i enjoy working on the cars.
again thanks to all who replied
again thanks to all who replied
