HELP!!! HP needed!
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Joined: Apr 2006
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From: Madison IN
HELP!!! HP needed!
HI there all you performance gurus....I need some input. I have a '75 that I bought from the original owner a few years ago. It has 57k original miles and is all numbers matching, which I want to keep that way, BUT...the problem is that it is the wennie L-48 version. What can I do to up my HP w/o making perminent changes to the engine or having to take it out of the car....if possible? Heads, itake manifold, headers....I wouldn't mind 350-400 hp if I can. What are my options?
A very big THANK YOU in advance for your valuable input.
Tom
A very big THANK YOU in advance for your valuable input.
Tom
Melting Slicks
Joined: Jul 2006
Posts: 2,282
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From: Salmon Arm, BC
Vortec heads,or other heads that will have a modern combustion chamber to promote swirl and around 64 cc in size to boost compression, performer RPM intake, hydraulic roller cam ( in the range of 218-225 intake duration @.050 ) headers, and a dual 2 1/2" exhaust system.
This will get you into the range you want, and will be a blast to drive!!
This will get you into the range you want, and will be a blast to drive!!
Team Owner
Joined: Jun 2000
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From: Southbound
Cruise-In II Veteran
You are not likely to get the horsepower you want without permanent changes.
Drifting
Joined: May 2011
Posts: 1,526
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From: Atlanta Ga
HI there all you performance gurus....I need some input. I have a '75 that I bought from the original owner a few years ago. It has 57k original miles and is all numbers matching, which I want to keep that way, BUT...the problem is that it is the wennie L-48 version. What can I do to up my HP w/o making perminent changes to the engine or having to take it out of the car....if possible? Heads, itake manifold, headers....I wouldn't mind 350-400 hp if I can. What are my options?
A very big THANK YOU in advance for your valuable input.
Tom
A very big THANK YOU in advance for your valuable input.
Tom
But it sounds like you don't truly want to mess with your car at all...or at least the original parts... So why don't you just pull the engine and throw in another one that you can have fun with...
Team Owner
Joined: Jun 2000
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From: Southbound
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Joined: Apr 2006
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From: Madison IN
You're right....I am undecided at this point....
I don't have the budget to get a second "toy" and while my '75 convertible is not ever going to be like a mid-year or even an early C3 I am hesitant to make any lasting alterations.
If I put in a different engine for a while then reinstall the original, wouldn't the fact that the miles on the engine and the miles on the car itself and tranny don't match "devalue" the car quite a bit?
If I put in a different engine for a while then reinstall the original, wouldn't the fact that the miles on the engine and the miles on the car itself and tranny don't match "devalue" the car quite a bit?
Instructor
Joined: Mar 2010
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From: Livingston TN
I don't have the budget to get a second "toy" and while my '75 convertible is not ever going to be like a mid-year or even an early C3 I am hesitant to make any lasting alterations. If I put in a different engine for a while then reinstall the original, wouldn't the fact that the miles on the engine and the miles on the car itself and tranny don't match "devalue" the car quite a bit?
If I put in a different engine for a while then reinstall the original, wouldn't the fact that the miles on the engine and the miles on the car itself and tranny don't match "devalue" the car quite a bit?Corvette Stories
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Melting Slicks
Joined: Dec 2009
Posts: 3,224
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From: Thunder Bay
I really hate to see you molest a 57K all original car, even if its only a '75. That's still a pretty sweet ride. If its not what you want, why not sell it for something you can play with without feeling guilty? I have a '66 that is all original, and it would be criminal to modify it, so I bought a '79 with a gazillion miles on it that no one is going to lose any sleep over. I realize not everyone is crazy enough to have two, so why not sell it and get what you really want?
Le Mans Master
Joined: Oct 2010
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From: melbourne florida
2023 C3 of the Year Finalist - Modified
o.k here we go, put a cam in it then have the heads milled some port work a good valve job and a good exhaust. see look my engine is stock. and go have fun. that way you can keep the purists happy.every one wants 350 - 400 horsepower but I'll bet you'd be happy with less
Race Director
Joined: Dec 1999
Posts: 19,610
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From: Forked River NJ
Your not going to devalue the 75 much by installing a different engine. There is not a tremendous value in a 75 even if it is a low mile car. I'm not a numbers matching type guy never have been. Most of the numbers cars are just parts people found with the correct numbers for their car. As long as you don't go wild it can always be returned back to stock. I'd like to know how many of these cars with original engines sitting under the bench actually have had the engines put back in. I'll bet it is very low. A Corvette is not a wise investment for return on your dollar. Have fun with it, the car is a hobby. How many golfers or boaters have a return on their investment?
Race Director
Joined: Sep 2002
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From: San Diego - Deep Within The State of CONFUSION!
