HP Rating for a L48 - 1975
08-31-2005, 09:17 AM
#1
Racer
Thread Starter
HP Rating for a L48 - 1975
Question: I was looking in my repair manual and it stated there was (2) Horsepower rating for the L48 350 in 1975, nothing special but 195 and 250HP; this may be a stupid question but what is the engine difference in these ratings? I assume I can find what I have by looking on the right head? I did a search but found nothing. Any thoughts? Thanks!
08-31-2005, 09:23 AM
#2
Race Director
look at the VIN and decode it from there. if your #'s match, you have the lower Hp model. if memory serves right, the only major difference is in valve springs and cam.
08-31-2005, 09:29 AM
#3
Racer
Thread Starter
Originally Posted by Aflac
look at the VIN and decode it from there. if your #'s match, you have the lower Hp model. if memory serves right, the only major difference is in valve springs and cam.
08-31-2005, 09:35 AM
#4
Le Mans Master
Originally Posted by Aflac
look at the VIN and decode it from there. if your #'s match, you have the lower Hp model. if memory serves right, the only major difference is in valve springs and cam.
08-31-2005, 09:35 AM
#5
Le Mans Master
Originally Posted by Aflac
look at the VIN and decode it from there. if your #'s match, you have the lower Hp model. if memory serves right, the only major difference is in valve springs and cam.
08-31-2005, 09:46 AM
#6
Racer
Thread Starter
Originally Posted by big_G
There are many differences...Crank, pistons, cam, 4 bolt mains, valve size, screw- in studs and guide-plates, carb, etc....
08-31-2005, 09:49 AM
#7
Race Director
l48's came with the lower HP..i'm not fully awake yet... forgot about the 4bolt block difference
08-31-2005, 10:20 AM
#8
Team Owner
Actually here is the 75's numbers
Two engine variations were offered.
L48 - 165hp
L82 -205hp
This site has a great breakdown for you.
http://www.idavette.net/facts/75.htm
Two engine variations were offered.
L48 - 165hp
L82 -205hp
This site has a great breakdown for you.
http://www.idavette.net/facts/75.htm
08-31-2005, 10:34 AM
#9
Le Mans Master
Originally Posted by theandies
Actually here is the 75's numbers
Two engine variations were offered.
L48 - 165hp
L82 -205hp
This site has a great breakdown for you.
http://www.idavette.net/facts/75.htm
Two engine variations were offered.
L48 - 165hp
L82 -205hp
This site has a great breakdown for you.
http://www.idavette.net/facts/75.htm
Those are the numbers.
08-31-2005, 11:08 AM
#10
Racer
Thread Starter
Damn, 165HP! Crazy that is a 350! My GTP has 260 and it's a V6; I may have to start modding this car! I hope the Dual exhaust and Turbo mufflers will help. What else would help and would not affect the originality of the car?
Last edited by 1975Stingray; 08-31-2005 at 11:13 AM.
08-31-2005, 11:38 AM
#12
Racer
Thread Starter
Originally Posted by kdf1986
What was the Corvette year with the lowest HP rating? Was it 1975 when they first went to the single catalytic converter back to a dual exhaust?
kdf
kdf
08-31-2005, 12:58 PM
#13
Team Owner
Actually 1953 '54 and '55 with the 6 cylinder were the lowest - 150 and 155hp. But 1975 was the lowest with a V8. 1955 was the first year for the V8 as an option and it was 195hp I think.
08-31-2005, 02:07 PM
#14
Melting Slicks
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Recurve and set timing as per Lars paper, add true duals and you'll jump way up in hp. Before I changed engines, I did only what I've mentioned to my stock (and tired) L-48 and ended up just over 200 rwhp on stock manifolds.
08-31-2005, 02:37 PM
#15
Racer
Thread Starter
Originally Posted by 75Rag
Recurve and set timing as per Lars paper, add true duals and you'll jump way up in hp. Before I changed engines, I did only what I've mentioned to my stock (and tired) L-48 and ended up just over 200 rwhp on stock manifolds.
08-31-2005, 02:52 PM
#18
Racer
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St. Jude Donor '05-'07
Originally Posted by 1975Stingray
Damn, 165HP! Crazy that is a 350! My GTP has 260 and it's a V6; I may have to start modding this car! I hope the Dual exhaust and Turbo mufflers will help. What else would help and would not affect the originality of the car?
Stroke it, new cam, heads, intake, carb, headers, exhaust....should make it a little more fun...
08-31-2005, 03:00 PM
#20
Racer
Thread Starter
Originally Posted by 25th silverbullet
Stroke it, new cam, heads, intake, carb, headers, exhaust....should make it a little more fun...
Last edited by 1975Stingray; 08-31-2005 at 03:05 PM.