need help picking some heads
Thread Starter
Intermediate
Joined: Dec 2014
Posts: 40
Likes: 0
need help picking some heads
85 corvette slp ported runners and lower intake cold air filter cut air box modded maf and denso 24 lbs injectors my ? Is what heads with good price and keep compression ratios the same headsI was looking at was 76cc dart iron heads 75 cc afr heads and world products heads could I run a 64cc head with.out making the compression way higher
Melting Slicks
Joined: Jun 2013
Posts: 3,065
Likes: 39
I run 65 cc AFR 195 Eliminator heads on 93 octane. 1985 has pretty low compression at 9:1. Mine is 10:1 now on my 1985 so if it were me I would be looking to increase the compression ratio if I'm changing the heads. I also have a 0.028" thick head gasket and 0.052" quench. My total timing at 35 degrees and I have no detectable spark knock on 93 octane.
I think people have had good results using AFR 180 Eliminator heads with TPI intakes so you may want to do some research on that if it's within your budget.
I think people have had good results using AFR 180 Eliminator heads with TPI intakes so you may want to do some research on that if it's within your budget.
Thread Starter
Intermediate
Joined: Dec 2014
Posts: 40
Likes: 0
I run 65 cc AFR 195 Eliminator heads on 93 octane. 1985 has pretty low compression at 9:1. Mine is 10:1 now on my 1985 so if it were me I would be looking to increase the compression ratio if I'm changing the heads. I also have a 0.028" thick head gasket and 0.052" quench. My total
timing at 35 degrees and I have no detectable spark knock on 93 octane.
I think people have had good results using AFR 180 Eliminator heads with TPI intakes so you may want to do some research on that if it's within your budget.
timing at 35 degrees and I have no detectable spark knock on 93 octane.
I think people have had good results using AFR 180 Eliminator heads with TPI intakes so you may want to do some research on that if it's within your budget.
Melting Slicks
Joined: Jun 2013
Posts: 3,065
Likes: 39
Mine is set at 6*. I changed the timing in the tune. How ever all I did was increase every number at WOT by the same amount so at WOT it would be equivalent to setting base timing at 11*.
I gotta warn you, this does get expensive. If you wanna go fast with a nice bit of torque you can copy my set up. If you want a lot of torque but be a little slower than you can build with your TPI intake.
Here's a link to my dyno results and my combo should be posted somewhere in the replies.
https://www.corvetteforum.com/forums/c4-tech-performance/3564716-surprise.html
That comes out to about 405 hp and 405 tq at the crank with a 15% drive train loss.
I gotta warn you, this does get expensive. If you wanna go fast with a nice bit of torque you can copy my set up. If you want a lot of torque but be a little slower than you can build with your TPI intake.
Here's a link to my dyno results and my combo should be posted somewhere in the replies.
https://www.corvetteforum.com/forums/c4-tech-performance/3564716-surprise.html
That comes out to about 405 hp and 405 tq at the crank with a 15% drive train loss.
Melting Slicks
Joined: Jun 2013
Posts: 3,065
Likes: 39
Not really hard to tune. It's just there's not many people who know what they're doing. I tuned mine just fine. After I had a lot of advice from people on the forum. If you copy my set up I can just email you my tune and you can burn it to a chip and install it in your ECM.
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Drifting
Joined: Jul 2014
Posts: 1,426
Likes: 46
From: Lynchburg, VA
Yeah afr is only 1325 for the pair so.its not that bad I wanted to do a cam swap too and lifter set something give me that nice throw back in the seat its a stock block but rebuilt at 118'000 miles has 143'000 now but trans is good it was redone at the same time but i wanna stay ecu.friendly too just wanna little more bang for.the buck what head gaskets did u use brand wise
Melting Slicks
Joined: Jun 2013
Posts: 3,065
Likes: 39
Melting Slicks
Joined: Jun 2013
Posts: 3,065
Likes: 39