Modded '76 Vette, how much HP?
Thread Starter
Intermediate
Joined: Mar 2002
Posts: 26
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From: B.C.
Modded '76 Vette, how much HP?
Hi guys I recently purchased a rebuilt L48 vette with headers, true dual exhaust 260h cam or xe262,not sure... edelbrock intake, stock rochester 750 cfm carb and Th-350 Auto. I hope to get a B&M Stage 2 shifter but thats another story so any ideas on what my HP is? ive been told about 300hp It was stock 180 i believe. thanx :reddevil :rolleyes: :reddevil
Drifting
Joined: Nov 2000
Posts: 1,428
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Re: Modded '76 Vette, how much HP? (Stinger76)
300 HP should be pretty close.....mine (260H cam and chambered pipes, but no headers) desk dynoes at 275......If I go any farther, it'll be heads and headers for me.....your biggest bottleneck now are the stock '76 "smog heads". Welcome to the Forum...theres a wealth of info here...just hang around and You'll see.......... :lol: :lol: :lol:
Instructor
Joined: Jan 2002
Posts: 211
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From: Vancouver BC CANADA
Re: Modded '76 Vette, how much HP? (Stinger76)
Hey Stinger, welcome to the board. Like you, I'm kinda new around here - I'm still searching for the perfect C3 to buy. I don't have an answer to your post, it's just good to see another British Columbian on the forum :cool: . Take care and good luck.
Burning Brakes
Joined: Jan 2002
Posts: 1,007
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From: many sticks land of mountains
Re: Modded '76 Vette, how much HP? (Ganey)
I'm in the same situation that you are with my '76 L-48 auto. (Factor dog heads, I mean smog heads) When you / if you change them out and find something good, let me know.
From the similarities I would say that you are running about where I'm at,
approx. 260-270.
Welcome and Drive On,
TJ :cheers:
From the similarities I would say that you are running about where I'm at,
approx. 260-270.
Welcome and Drive On,
TJ :cheers:
Thread Starter
Intermediate
Joined: Mar 2002
Posts: 26
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From: B.C.
Re: Modded '76 Vette, how much HP? (Alwyn678)
Actually im not too sure which heads im running, I guess ill have to find some time and take it apart and see, how will I know what to look for?
P.S. Only 17 but eager to learn
-I love the vettes-
P.S. Only 17 but eager to learn
-I love the vettes-
Thread Starter
Intermediate
Joined: Mar 2002
Posts: 26
Likes: 0
From: B.C.
Re: Modded '76 Vette, how much HP? (Stinger76)
Oh, i forgot to add, If i am running smog heads, how much would it be for a good pair? and how much would it enhance my performance? hp wise... thanx
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Pro
Joined: Apr 2001
Posts: 591
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From: Morinville Alberta
Re: Modded '76 Vette, how much HP? (Stinger76)
I have heard the the 1.96 heads help out the torque #'s although at high rpm( where HP comes in to play) they run out of flow.
I t is the same idea as 4 hole or open bore spacer if the opening is smaller the velocity of the fuel/air mix will speed up.
I t is the same idea as 4 hole or open bore spacer if the opening is smaller the velocity of the fuel/air mix will speed up.
Thread Starter
Intermediate
Joined: Mar 2002
Posts: 26
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From: B.C.
Re: Modded '76 Vette, how much HP? (Stinger76)
I did a little looking around the engine compartment and I believe they are the stock smog heads. They were painted yellow just as the engine block.... What are an ideal pair of heads for the l48 that would be effective and at a low cost?thanx :cool:
Race Director
Joined: Jun 2000
Posts: 10,046
Likes: 675
From: FL
Re: Modded '76 Vette, how much HP? (Stinger76)
Vortec heads are very good, BUT you need a new intake manifold (different bolt pattern) and must convert the carb to electric choke (no crossover). Also, stock Vortecs can only handle about .450 lift (not sure what the 260H is) is if going for a better cam, the heads must be machined for bigger springs. Figure $800 US total and you can get a set of Edelbrock or Trick Flow aluminum's for same price if you shop around.
BTW: Welcome to the forum. How is the skiing this year? I lived on Whidbey for 9 years and am heading back this summer.
BTW: Welcome to the forum. How is the skiing this year? I lived on Whidbey for 9 years and am heading back this summer.
Thread Starter
Intermediate
Joined: Mar 2002
Posts: 26
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From: B.C.
Re: Modded '76 Vette, how much HP? (SteveG75)
Thanx for all the info Steve, I don't think I will be getting new heads any time in the near future... Still a student hehe, I hope to get all of the little things fixed up first.. The mountains around here are supposed to be really good this winter, but unfortunately I seperated my shoulder in the last football game of the season so i've been missin out, oh well :nopity
-PS- Im sure ill have more questions to ask your guys later, this is a great Forum! I just wish i found out about it sooner! :yesnod:
-PS- Im sure ill have more questions to ask your guys later, this is a great Forum! I just wish i found out about it sooner! :yesnod: