71 L48 engine mods
Thread Starter
Instructor
Joined: Mar 2007
Posts: 118
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71 L48 engine mods
I have a '71 matching numbers coupe with the base 350/270 engine.
This is a sunny day driver and will never be a NCRS car as long as I own it.
What engine mods could I do that would not devalue the numbers matching engine.
I know about carb, headers, intake and such as long as I have the original parts that can go with the car. My concern is what happens with the addition of cams, pistons and such.
thanks
This is a sunny day driver and will never be a NCRS car as long as I own it.
What engine mods could I do that would not devalue the numbers matching engine.
I know about carb, headers, intake and such as long as I have the original parts that can go with the car. My concern is what happens with the addition of cams, pistons and such.
thanks
Team Owner
Joined: Jan 2006
Posts: 37,637
Likes: 3,116
From: Crossville TN
If your car is basically "stock", anything you do to it that departs from a stock assembly will cost you money when you sell it. The best money you can spend to improve engine performance is to rebuild the carb and distributor, recurve the distributor per Lars Grimsrud's papers, and keep it well maintained. {Just my .02.....}
Senior Member
Joined: Jan 2008
Posts: 12,146
Likes: 2,038
From: Easton, PA
St. Jude Donor '10
I have a '71 matching numbers coupe with the base 350/270 engine.
This is a sunny day driver and will never be a NCRS car as long as I own it.
What engine mods could I do that would not devalue the numbers matching engine.
I know about carb, headers, intake and such as long as I have the original parts that can go with the car. My concern is what happens with the addition of cams, pistons and such.
thanks
This is a sunny day driver and will never be a NCRS car as long as I own it.
What engine mods could I do that would not devalue the numbers matching engine.
I know about carb, headers, intake and such as long as I have the original parts that can go with the car. My concern is what happens with the addition of cams, pistons and such.
thanks
Bump for you. I am anxious to hear the answers to this one myself. I'll sit and listen. Thanks. David
Race Director
Joined: Apr 1999
Posts: 11,520
Likes: 13
From: CORVETTE 77 385 C.I. TEXAS
The hp gain for the 350hp is mainly cam, heads w/ larger valves & higher C/R.
When an engine is overhauled it is common to bore & replace pistons.
So you would use pistons that give a higher C/R.
68-72 standard hoods have limited clearance. One should consider the entire flow path.
The previous 2101 Performer & Chevy's bow tie intake are similar. Chevy has said it was as good as the high rise (LT-1). Chevy's bow tie logo & Edelbrock logo are behind the thermostat housing & not on the passenger side runner.
Cam- You should state trans.
When an engine is overhauled it is common to bore & replace pistons.
So you would use pistons that give a higher C/R.
68-72 standard hoods have limited clearance. One should consider the entire flow path.
The previous 2101 Performer & Chevy's bow tie intake are similar. Chevy has said it was as good as the high rise (LT-1). Chevy's bow tie logo & Edelbrock logo are behind the thermostat housing & not on the passenger side runner.
Cam- You should state trans.
Burning Brakes
Joined: May 2009
Posts: 850
Likes: 36
From: Providence RI
I've got the same car and same engine, and the same dilemma.
At rebuild-time, I would recommend going to a 383 stroker kit, and porting the heads to complement a more modern-profile camshaft.
It would appear completely stock from the outside, but roughly double the hp of the stock engine.
At rebuild-time, I would recommend going to a 383 stroker kit, and porting the heads to complement a more modern-profile camshaft.
It would appear completely stock from the outside, but roughly double the hp of the stock engine.
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