Mild L48 Build
Le Mans Master
Joined: Feb 1999
Posts: 8,351
Likes: 75
From: Tampa Bay FL
For a true $1,000 budget:
Rebuild both qjet and distributor for performance
K&N filter
1.6 roller rocker arms will increase lift and duration of your stock 300hp cam
Coated headers - Hedmann Jet-Hot #68301 emissions compatible
True dual exhaust and super turbo mufflers
I am assuming your cylinder heads are in decent condition. For this budget, you can't afford cylinder heads; it would be your entire budget.
Rebuild both qjet and distributor for performance
K&N filter
1.6 roller rocker arms will increase lift and duration of your stock 300hp cam
Coated headers - Hedmann Jet-Hot #68301 emissions compatible
True dual exhaust and super turbo mufflers
I am assuming your cylinder heads are in decent condition. For this budget, you can't afford cylinder heads; it would be your entire budget.
Burning Brakes
Joined: Nov 2012
Posts: 788
Likes: 100
From: Indianapolis IN
if your going that far change the cam and timing set. The stock cam timing gear has nylon coated teeth. 90% of the chevrolet cams i have replaced with stock timing sets had nylon teeth either missing, broken or cracked and/or excessive chain play. These would run over 100,000 miles when new if it was in the first 10 years. The nylon breaks down with age. Heat, exposure to oil. These are all 30-40+ yeas old now. Timing chain failure can take out your engine.
http://forums.corvetteforum.com/c3-t...ming-gear.html
http://forums.corvetteforum.com/c3-t...ming-gear.html
Thread Starter
Burning Brakes
Joined: Aug 2001
Posts: 1,160
Likes: 3
From: Greensboro NC
For a true $1,000 budget:
Rebuild both qjet and distributor for performance
K&N filter
1.6 roller rocker arms will increase lift and duration of your stock 300hp cam
Coated headers - Hedmann Jet-Hot #68301 emissions compatible
True dual exhaust and super turbo mufflers
I am assuming your cylinder heads are in decent condition. For this budget, you can't afford cylinder heads; it would be your entire budget.
Rebuild both qjet and distributor for performance
K&N filter
1.6 roller rocker arms will increase lift and duration of your stock 300hp cam
Coated headers - Hedmann Jet-Hot #68301 emissions compatible
True dual exhaust and super turbo mufflers
I am assuming your cylinder heads are in decent condition. For this budget, you can't afford cylinder heads; it would be your entire budget.
Pro
Joined: May 2001
Posts: 571
Likes: 5
From: usa
For a true $1,000 budget:
Rebuild both qjet and distributor for performance
K&N filter
1.6 roller rocker arms will increase lift and duration of your stock 300hp cam
Coated headers - Hedmann Jet-Hot #68301 emissions compatible
True dual exhaust and super turbo mufflers
I am assuming your cylinder heads are in decent condition. For this budget, you can't afford cylinder heads; it would be your entire budget.
Rebuild both qjet and distributor for performance
K&N filter
1.6 roller rocker arms will increase lift and duration of your stock 300hp cam
Coated headers - Hedmann Jet-Hot #68301 emissions compatible
True dual exhaust and super turbo mufflers
I am assuming your cylinder heads are in decent condition. For this budget, you can't afford cylinder heads; it would be your entire budget.
isn't the L48 under 200 hp ?,
just checking because I am doing a similar build.
Le Mans Master
Joined: Mar 2008
Posts: 5,948
Likes: 72
From: Oxford MA-----You just lost the game!!!!
Scott
Safety Car
Joined: Jan 2009
Posts: 3,736
Likes: 56
From: anchorage ak
I didnt dyno my l48 stock or with just the head change, but i did manage to get it to 260 rwhp with heads, cam, aluminum intake 1.6 roller tip rockers, long tubes, duals and a holley. Probably 40 rwhp in the camshaft alone. If id went roller cam and afr heads I'd probably hit 300 at rear wheel.
Le Mans Master
Joined: Apr 2011
Posts: 6,284
Likes: 1,170
From: Hermosa
I didnt dyno my l48 stock or with just the head change, but i did manage to get it to 260 rwhp with heads, cam, aluminum intake 1.6 roller tip rockers, long tubes, duals and a holley. Probably 40 rwhp in the camshaft alone. If id went roller cam and afr heads I'd probably hit 300 at rear wheel.
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Thread Starter
Burning Brakes
Joined: Aug 2001
Posts: 1,160
Likes: 3
From: Greensboro NC
I didnt dyno my l48 stock or with just the head change, but i did manage to get it to 260 rwhp with heads, cam, aluminum intake 1.6 roller tip rockers, long tubes, duals and a holley. Probably 40 rwhp in the camshaft alone. If id went roller cam and afr heads I'd probably hit 300 at rear wheel.
Safety Car
Joined: Jan 2009
Posts: 3,736
Likes: 56
From: anchorage ak
On the l48 I was using edelbrock rpms, the cheaper ones, 185cc runners and 64cc chambers, only flowed 239 @ .500, with the xe262h it worked ok, but I think that vortecs actually out flow that series of rpm head. if I were going to do it again I'd definitely go with afr 180cc and a roller cam, I used afr 195's on the 400 I got in the vette now, the quality of the head alone is enough to know you get what you pay for.
I'd figure an honest 30 to 40 horse from the cam, with the heads, intake, headers and carb versus just the heads intake and carb, it adds time in which the valve is open and how much the valve opens plus the valve timing events that make it all come together to build power. If I'd gone roller the gain would have been more. It's more than adjusting were the power comes in.
I'd figure an honest 30 to 40 horse from the cam, with the heads, intake, headers and carb versus just the heads intake and carb, it adds time in which the valve is open and how much the valve opens plus the valve timing events that make it all come together to build power. If I'd gone roller the gain would have been more. It's more than adjusting were the power comes in.
Last edited by bluedawg; Oct 30, 2013 at 07:39 PM. Reason: Shittty spellin and 3rd grade puntuation.
Le Mans Master
Joined: Mar 2008
Posts: 5,948
Likes: 72
From: Oxford MA-----You just lost the game!!!!
Scott
Last edited by scottyp99; Oct 30, 2013 at 07:42 PM.
Le Mans Master
Joined: Apr 2011
Posts: 6,284
Likes: 1,170
From: Hermosa
On the l48 I was using edelbrock rpms, the cheaper ones, 185cc runners and 64cc chambers, only flowed 239 @ .500, with the xe262h it worked ok, but I think that vortecs actually out flow that series of rpm head. if I were going to do it again I'd definitely go with afr 180cc and a roller cam, I used afr 195's on the 400 I got in the vette now, the quality of the head alone is enough to know you get what you pay for.
I've barely got this 350 done and installed and I'm already making plans for the 400 block I have in the garage. I was thinking 195 AFR's as well. You got a dyno on your current combo?
Sorry, off topic.
Last edited by REELAV8R; Oct 30, 2013 at 08:19 PM.
Safety Car
Joined: Jan 2009
Posts: 3,736
Likes: 56
From: anchorage ak
I dont. My friend that had the dyno sold it and it would cost me twice as much to dyno it now. On the l48 my timing was spot on and we picked up 9 horse through jet changes, it was a fun experience for sure, but if you have your timing dialed in and use an air fuel exhaust gas anilyzer for starting and the quarter mile jetting for the best mph then all the dyno does is give you numbers, dont get me wrong, if i could do it reqsonably price wise and i could run the petal i might do it again, but for now ill wait untill the track opens next spring. If money comes through it might be with the blower. 260 was actually 258 rwhp and it was through a 350 turbo. It was fun, but nothing like the 400.
Last edited by bluedawg; Oct 30, 2013 at 10:46 PM.
Thread Starter
Burning Brakes
Joined: Aug 2001
Posts: 1,160
Likes: 3
From: Greensboro NC
Edelbrock performer 2116 i think. If it doesnt fit, so what, I'll make it fit. I'm so way past it has to be "stock".
Been there, done that, won't go back, nothing but a money pit and if you use repro "is it really matching, stock?"
I'm actually looking forward to cutting a hole in a corvette hood LOL if I have to!
Le Mans Master
Joined: May 2002
Posts: 5,084
Likes: 786
From: Lebanon Township New Jersey
I had an Edelbrock Performer manifold, with Vortec heads, with a Qjet and a stock, single snorkel air cleaner under the stock hood of my 77 for a while.
Racer
Joined: Feb 2010
Posts: 425
Likes: 2
Le Mans Master
Joined: Mar 2008
Posts: 5,948
Likes: 72
From: Oxford MA-----You just lost the game!!!!
If Mick is willing to run an aftermarket dropped base air cleaner, which it sounds like he is, he will be able to run a Performer EPS with no problems.....probably.......
Scott
Scott