Vortec setup?
Thread Starter
Pro
Joined: Sep 2004
Posts: 611
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From: Minnesota
Vortec setup?
I am thinking about changing my stock heads and intake for some vortec heads and intake.
What is your opinion on this setup for a stock 77' L82?
If you are running a vortec setup please post your setup and the spec's and casting numbers of the heads.
What is your opinion on this setup for a stock 77' L82?
If you are running a vortec setup please post your setup and the spec's and casting numbers of the heads.
Melting Slicks
Joined: Dec 2000
Posts: 2,198
Likes: 2
From: Eastern Connecticut
I am going to get one of Scoggin-Dickie's vortec kits for my 73. The smaller heads will bump compression to a reasonable number. For $730 for heads, manifold, rocker arms, gaskets and bolts, I think it's the best bang for the buck out there. Go for it. Joe
Race Director
Joined: Sep 2004
Posts: 11,874
Likes: 263
From: Arlington Va Current ride 04 vert, previous vettes: 69 vert, 77 resto mod
i have a set in my garage....i did not use them because for some larger cams you have to do something to the area that the valve springs set in....not sure what it entails but i passed on using them this time....you should figure out exactly what this modification entails...so there are no hidden costs...
Team Owner
Joined: Sep 2003
Posts: 88,393
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From: eville in
Originally Posted by bobs77vet
i have a set in my garage....i did not use them because for some larger cams you have to do something to the area that the valve springs set in....not sure what it entails but i passed on using them this time....you should figure out exactly what this modification entails...so there are no hidden costs...
Thread Starter
Pro
Joined: Sep 2004
Posts: 611
Likes: 0
From: Minnesota
Originally Posted by bobs77vet
i have a set in my garage....i did not use them because for some larger cams you have to do something to the area that the valve springs set in....not sure what it entails but i passed on using them this time....you should figure out exactly what this modification entails...so there are no hidden costs...
I am interested in buying them.
Let me know.
Thanks
Race Director
Joined: Sep 2004
Posts: 11,874
Likes: 263
From: Arlington Va Current ride 04 vert, previous vettes: 69 vert, 77 resto mod
Originally Posted by captainmorgan
Do you want to sell them?
I am interested in buying them.
Let me know.
Thanks
I am interested in buying them.
Let me know.
Thanks
sorry not at this time....its the top half of a 4 bolt roller cam engine that will become a 383....at some time in the future....
Instructor
Joined: May 2004
Posts: 183
Likes: 0
From: Lower Burrell PA
I have a set of vortecs in my garage and am thinking about putting them on my 77 this winter. The vortec heads are 64cc's as opposed to the 76cc's that are on your motor. This will increase the compression to about 9.5 to 1 or slightly more. The stock vortec heads cannot handle anymore lift than about .480 or the valve seats need to be cut down. This is not an expensive deal, ( I think it was about $50 while having the valve job done. Also the studs are pressed in, these can be tapped for 3/8" studs for about $100 additional. If you put in a decent cam basically you are building a 350/330HP crate moter. You have 210 HP now, I think you should notice a increase in HP by 50%. 
I think you will be very happy with this combo. Also there are alot of cams at the .480 or less lift range, but if I do this project I think I will have all the work done, so it is done. Just my 2cents...........
I think you will be very happy with this combo. Also there are alot of cams at the .480 or less lift range, but if I do this project I think I will have all the work done, so it is done. Just my 2cents...........
Race Director
Joined: Sep 2004
Posts: 11,874
Likes: 263
From: Arlington Va Current ride 04 vert, previous vettes: 69 vert, 77 resto mod
i think this is a great way to go....i didn't do it ...but not because it was a bad idea....i had a better deal on an "old school" motor and the guy building it wanted to use stuff he had which included an edelbrock performer manifold....so i went with the better deal which was a total package.....
remember also you will need a different intake manifold..
remember also you will need a different intake manifold..
Last edited by bobs77vet; Dec 26, 2004 at 07:14 PM.
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i need a set to pocket port for my 383 i'm putting in my P/U 
Safety Car
Joined: Oct 2004
Posts: 3,725
Likes: 5
From: Minnesota
Originally Posted by finallygot1
I have a set of vortecs in my garage and am thinking about putting them on my 77 this winter. The vortec heads are 64cc's as opposed to the 76cc's that are on your motor. This will increase the compression to about 9.5 to 1 or slightly more. The stock vortec heads cannot handle anymore lift than about .480 or the valve seats need to be cut down. This is not an expensive deal, ( I think it was about $50 while having the valve job done. Also the studs are pressed in, these can be tapped for 3/8" studs for about $100 additional. If you put in a decent cam basically you are building a 350/330HP crate moter. You have 210 HP now, I think you should notice a increase in HP by 50%. I think you will be very happy with this combo. Also there are alot of cams at the .480 or less lift range, but if I do this project I think I will have all the work done, so it is done. Just my 2cents...........
I think you will be very happy with this combo. Also there are alot of cams at the .480 or less lift range, but if I do this project I think I will have all the work done, so it is done. Just my 2cents...........http://www.jegs.com/cgi-bin/ncommerc...27&prmenbr=361
Race Director
Joined: Sep 2004
Posts: 11,874
Likes: 263
From: Arlington Va Current ride 04 vert, previous vettes: 69 vert, 77 resto mod
Originally Posted by captainmorgan
Do you have to use different headers for a vortec head?
?????? not sure ....but i don't think so on regular headers .......but the exhaust ports may be a different shape???? this may make a diference on some exotic headers....
Racer
Joined: Apr 2001
Posts: 309
Likes: 5
From: La Crosse,WI,USA
Originally Posted by bobs77vet
?????? not sure ....but i don't think so on regular headers .......but the exhaust ports may be a different shape???? this may make a diference on some exotic headers....
Melting Slicks
Joined: Dec 2000
Posts: 2,198
Likes: 2
From: Eastern Connecticut
Originally Posted by captainmorgan
Do you have to use different headers for a vortec head?
Instructor
Joined: May 2004
Posts: 183
Likes: 0
From: Lower Burrell PA
[QUOTE=jdmick]What kind of octane do you need to use with the 9.5/1 compression. I'm asking because I'm considering the GM crate HO. It advertises 9.1/1.
I put this exact same motor in my 72 Nova SS http://www.pittsburghlive.com/x/search/s_71284.html
i have the manual at home, I will check the octane requirements. I don't drive it much so I usually put 93 in it.
PS: you will LOVE this motor, let me know if I can be of any help
I put this exact same motor in my 72 Nova SS http://www.pittsburghlive.com/x/search/s_71284.html
i have the manual at home, I will check the octane requirements. I don't drive it much so I usually put 93 in it.
PS: you will LOVE this motor, let me know if I can be of any help
Race Director
Joined: Sep 2004
Posts: 11,874
Likes: 263
From: Arlington Va Current ride 04 vert, previous vettes: 69 vert, 77 resto mod
just saw and edlebrock fuel injection set up for the vortec heads...like $2300....i bet that would be sweet on top of a 4 bolt main, 383 roller cam engine......you see, thats why i didn't build the 383 of my dreams ....i couldn't afford it..............
Intermediate
Joined: Sep 2003
Posts: 49
Likes: 0
From: Denton TX
Vortec heads
I just installed the standard vortec heads on my 77 L-48 engine. It had the standard heads with Edelbrock Performer intake, Comp Camps 268H cam, true dual exhaust with no cats. Previous 0-60 run (using G-Tech meter) was 6.25 seconds, which equates to about 260 hp. With change to vortec heads with new Performer intake 0-60 dropped to 5.7 seconds, which should be about 300 hp. That is all running 87 octane gas. Torque is much better all the way from start to finish, and much better throttle response. Conversion was relatively easy.
