76 vette engine upgrade
Thread Starter
Cruising
Joined: Apr 2014
Posts: 10
Likes: 0
From: Big Stone Gap Virginia
76 vette engine upgrade
Thinking of bumping up my hp with a few upgrades:
1.)I have a set of double hump heads from a late 60s chevelle or corvette(according to the casting # it is from a 67) that I plan to have rebuilt. Springs, "trued up", ported and polished. Guy at the machine shop says these heads STOCK were good for 375hp, but I could easily get 425hp out of them?
2.)Hooker Competition Series Headers
3.)Edelbrock Torquer II Intake
Any thoughts on this? Would there be any issues in doing this?
Help is very much appreciated.
1.)I have a set of double hump heads from a late 60s chevelle or corvette(according to the casting # it is from a 67) that I plan to have rebuilt. Springs, "trued up", ported and polished. Guy at the machine shop says these heads STOCK were good for 375hp, but I could easily get 425hp out of them?
2.)Hooker Competition Series Headers
3.)Edelbrock Torquer II Intake
Any thoughts on this? Would there be any issues in doing this?
Help is very much appreciated.
Drifting
Joined: Dec 2004
Posts: 1,714
Likes: 42
From: Austin Texas
With stock transmission and rear end gearing, and a factory style cam, you may not be happy with that rpm range of that intake on the street.
Is this a drag car or street car and what other mods to the cam and gearing have been done if any? Is this going on the factory block or a rebuilt block? Just curious.
Is this a drag car or street car and what other mods to the cam and gearing have been done if any? Is this going on the factory block or a rebuilt block? Just curious.
Melting Slicks
Joined: Jul 2010
Posts: 2,503
Likes: 33
From: McGrady NC
St. Jude Donor '15-'16
You'll need a decent cam and stiffer gears with that combination. Are you running a four speed? If not, the cam you'll need will require a higher stall converter.
Big Stone Gap? I have business in Duffield pretty often. Nice place.
Big Stone Gap? I have business in Duffield pretty often. Nice place.
Le Mans Master
Joined: Mar 2008
Posts: 5,948
Likes: 72
From: Oxford MA-----You just lost the game!!!!
Those old camel hump heads were pretty good, back in the day, but that was almost 50 years ago. Cylinder heads have come a looooong way since then. You can get far superior aluminum heads for less than a grand. It just doesn't make financial sense to sink money into those old heads.
Torker II intake=single plane. Not usually recommended for a street car, go with a dual plane, like an Edelbrock Performer or something similar.
Beware of people trying to pass off their junk as "just what you need to go fast!"
Scott
Torker II intake=single plane. Not usually recommended for a street car, go with a dual plane, like an Edelbrock Performer or something similar.
Beware of people trying to pass off their junk as "just what you need to go fast!"
Scott
Thread Starter
Cruising
Joined: Apr 2014
Posts: 10
Likes: 0
From: Big Stone Gap Virginia
With stock transmission and rear end gearing, and a factory style cam, you may not be happy with that rpm range of that intake on the street.
Is this a drag car or street car and what other mods to the cam and gearing have been done if any? Is this going on the factory block or a rebuilt block? Just curious.
Is this a drag car or street car and what other mods to the cam and gearing have been done if any? Is this going on the factory block or a rebuilt block? Just curious.
Drifting
Joined: Mar 2006
Posts: 1,263
Likes: 188
From: Wabasha Mn
Better make sure those heads have mounting holes for your brackets. You will need a cam upgrade unless you have an L82 . Use your qjet carb with some mods by Lars , recurve your dist using Lars mods. Keep your stock intake. 300 hp would wake your 76 up nicely. Lots of modern heads out there that are better than spending big $$$$ on some old heads. How much did he quote you for all the head work???
Thread Starter
Cruising
Joined: Apr 2014
Posts: 10
Likes: 0
From: Big Stone Gap Virginia
Better make sure those heads have mounting holes for your brackets. You will need a cam upgrade unless you have an L82 . Use your qjet carb with some mods by Lars , recurve your dist using Lars mods. Keep your stock intake. 300 hp would wake your 76 up nicely. Lots of modern heads out there that are better than spending big $$$$ on some old heads. How much did he quote you for all the head work???
Thread Starter
Cruising
Joined: Apr 2014
Posts: 10
Likes: 0
From: Big Stone Gap Virginia
It's the stock turbo 350 tranny. It is a nice place huh? next time your up this way give me a holler
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Melting Slicks
Joined: Jul 2010
Posts: 2,503
Likes: 33
From: McGrady NC
St. Jude Donor '15-'16
A Performer or Performer RPM would be better for you than a Torker series intake. A rear gear change to 3.73 or something would really wake up the car stoplight to stoplight. The mild stock cam is limiting your engine's potential. Big valve heads will probably hurt more than help at this point.
Thread Starter
Cruising
Joined: Apr 2014
Posts: 10
Likes: 0
From: Big Stone Gap Virginia
A Performer or Performer RPM would be better for you than a Torker series intake. A rear gear change to 3.73 or something would really wake up the car stoplight to stoplight. The mild stock cam is limiting your engine's potential. Big valve heads will probably hurt more than help at this point.
Melting Slicks
Joined: Jul 2010
Posts: 2,503
Likes: 33
From: McGrady NC
St. Jude Donor '15-'16
I'm coming up either late next week or early the following week. I visit the data center at the OnePartner medical building. If the weather is nice I like to drive the Vette.
Le Mans Master
Joined: Feb 2011
Posts: 5,943
Likes: 61
From: Southern NH
Putting double hump heads and headers on a 175hp engine is not going to give you 400 hp. that's just not how it works.
Le Mans Master
Joined: Mar 2008
Posts: 5,948
Likes: 72
From: Oxford MA-----You just lost the game!!!!
Scott
Le Mans Master
Joined: Oct 2010
Posts: 6,930
Likes: 845
From: melbourne florida
2023 C3 of the Year Finalist - Modified
the boost in compression will help out a bit, but still not 400 horses. an R.P.M air gap and a better cam will get you much closer.
and
very nice part of the commonwealth.
and
very nice part of the commonwealth.