Mild heads 91 l98
Thread Starter
Racer
Joined: Aug 2021
Posts: 409
Likes: 82
From: NW Arkansas
Mild heads 91 l98
I need to replace a head gasket on my l98 and was hoping to get a little more performance out of the heads while I was doing so. In the future I plan to put in a larger cam, large tube runners, exhaust headers, etc. and I want the heads to be able to keep up.
I'm planning on a 383 stroker build but want to retain the TPI style intake, although I do intend on buying larger tubes and porting the intake base and plenum. I want a little more power out of the car but am not going for a max build. Don't really care about horsepower or quarter times just want the car to be a thrill to drive/ride in.
I've looked into porting the stock heads and vortec heads.
I'm willing to spend around $1k for a complete set of heads and everything I would need to bolt them on to the engine. Lower is better but I'm willing to pay for quality (just not 2k lol)
Thanks!
I'm planning on a 383 stroker build but want to retain the TPI style intake, although I do intend on buying larger tubes and porting the intake base and plenum. I want a little more power out of the car but am not going for a max build. Don't really care about horsepower or quarter times just want the car to be a thrill to drive/ride in.
I've looked into porting the stock heads and vortec heads.
I'm willing to spend around $1k for a complete set of heads and everything I would need to bolt them on to the engine. Lower is better but I'm willing to pay for quality (just not 2k lol)
Thanks!
Pro
Joined: Mar 2006
Posts: 517
Likes: 142
From: Caribbean/Florida
Hello, you can have the stock 113 heads fully ported and install bigger valves and have a 5 angle valve job. Using Quality light weight valves and beehive valve spring with titanium retainers. Also upgrade the Rocker arms to 1.6:1 Roller Rockers. You can even use thinner head gaskets to bump up compression a bit. I would do a mild aftermarket cam the combination of heads and cam will make a nice up grade. This is what I did to my car. I would port your current plenum and intake base but buy aftermarket runners. I got 108Mph in the 1/4 with stock exhaust headers, just the manifolds, everything else was open exhaust, including the full TPIS Big Tube Flowmaster Mufflers and hi-flo front Y and Free flow catalytic converter. The heads are not going to be the restriction it will be the TPI. I make power up to about 5,600 rpms and shift at 6,000. A good head shop will do the work, mine did cost me about $1,200 which was about $800 less than my dream AFR heads. Good luck, please post your results...
Racer
Joined: Apr 2023
Posts: 274
Likes: 60
From: Texas
Mine has older Edelbrock 6085's (I think that is the PN). I consider them mild as they have 165cc runners, but do have 2.02/1.60 valves and a fast burn chamber which are nice traits. The original owner of mine cannot recall why they were replaced, probably the car overheated and warped/cracked the original heads.
You might be able to find a set used as people tend to upgrade often to bigger and badder stuff. Swap meets, ebay, maybe Camaro/Firebird pages even!
You might be able to find a set used as people tend to upgrade often to bigger and badder stuff. Swap meets, ebay, maybe Camaro/Firebird pages even!
Dr. Detroit
Joined: Mar 2012
Posts: 10,091
Likes: 4,016
From: New Braunfels Texas
The 113 heads will pickup fairly well if you do the standard blending but I wouldn't waste the time on a full port for these.......the mentioned 5 angle valave job is great too but you can get into 2K easily with these heads and still be behind an out of the box Dart 180.....
The Vortec isn't a good option as you are buying a $500 intake base right off the bat to make it work.......
Jebby
The Vortec isn't a good option as you are buying a $500 intake base right off the bat to make it work.......
Jebby
