What Head gaskets to use?
Thread Starter
Melting Slicks
Joined: May 2007
Posts: 3,246
Likes: 4
From: Bay Area CA
What Head gaskets to use?
I'm thinking of going with a set of these Brodix IK-180 Aluminum heads on a stock lower end, L48 350 in a '73. What head gaskets would be best to use, and what is the bore size that i need to look for? up to $70, or more if needed.
http://store.summitracing.com/partde...5&autoview=sku
Also, a second question, can i use a EGR I-manifold with these heads, or will they not support EGR, i need to know for the intake manifold choice. thanks.
http://store.summitracing.com/partde...?part=EDL-3701
Or
http://store.summitracing.com/partde...1&autoview=sku
http://store.summitracing.com/partde...5&autoview=sku
Also, a second question, can i use a EGR I-manifold with these heads, or will they not support EGR, i need to know for the intake manifold choice. thanks.
http://store.summitracing.com/partde...?part=EDL-3701
Or
http://store.summitracing.com/partde...1&autoview=sku
Last edited by RunningMan373; May 11, 2009 at 06:44 AM.
Le Mans Master
Joined: Apr 2005
Posts: 6,359
Likes: 428
From: Seattle Area WA
I'd use the GM .028" head gaskets.
http://store.summitracing.com/partde...7&autoview=sku
The IKs do not have crossovers and if you have a Q-jet, you may need to convert it to an electric choke.
http://store.summitracing.com/partde...7&autoview=sku
The IKs do not have crossovers and if you have a Q-jet, you may need to convert it to an electric choke.
Thread Starter
Melting Slicks
Joined: May 2007
Posts: 3,246
Likes: 4
From: Bay Area CA
http://store.summitracing.com/partde...art=PRO-66926C
or
http://store.summitracing.com/partde...5&autoview=sku
Also need to know what length of push rods to get???
Edit:
All right, talked to Brodix,, fel-pro 1003 head gasket, fel-pro 1404 exhaust, any stock GM intake gasket, have to change the studs for non roller rockers, Brodixes are tapered. What length push rods to use, is my only question.
Last edited by RunningMan373; May 11, 2009 at 03:36 PM.
Le Mans Master
Joined: Apr 2005
Posts: 6,359
Likes: 428
From: Seattle Area WA
IMHO, the 1003 is way to thick for your application. I would bet that Brodix is assuming you have "0" deck height in which case the 1003 would be a good choice. Stock L-48, the pistons are .025" in the hole, add on .041" for a 1003 gasket and your quench is too high at .066" and your compression is reduced. I would at least use the GM .028" gasket or even consider the Fel Pro 1094 as it is rated for aluminum heads and only .015" thick.
I would start with your stock pushrods and take a swipe pattern.
I would start with your stock pushrods and take a swipe pattern.
Safety Car
Joined: Dec 2005
Posts: 4,270
Likes: 20
From: Central Michigan
These heads have guideplates for the pushrods so you can't use self-aligning rockers. I am using the Summit aluminum roller rocker arms, believe they're made by Crane
Try what Scott recommends on the pushrods, if that doesn't work I have a push rod length checker you can use
Try what Scott recommends on the pushrods, if that doesn't work I have a push rod length checker you can use
Thread Starter
Melting Slicks
Joined: May 2007
Posts: 3,246
Likes: 4
From: Bay Area CA
These heads have guideplates for the pushrods so you can't use self-aligning rockers. I am using the Summit aluminum roller rocker arms, believe they're made by Crane
Try what Scott recommends on the pushrods, if that doesn't work I have a push rod length checker you can use
Try what Scott recommends on the pushrods, if that doesn't work I have a push rod length checker you can use
http://store.summitracing.com/partde...8&autoview=sku
IMHO, the 1003 is way to thick for your application. I would bet that Brodix is assuming you have "0" deck height in which case the 1003 would be a good choice. Stock L-48, the pistons are .025" in the hole, add on .041" for a 1003 gasket and your quench is too high at .066" and your compression is reduced. I would at least use the GM .028" gasket or even consider the Fel Pro 1094 as it is rated for aluminum heads and only .015" thick.
I would start with your stock pushrods and take a swipe pattern.
I would start with your stock pushrods and take a swipe pattern.
Thanks all. C.
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Le Mans Master
Joined: Apr 2005
Posts: 6,359
Likes: 428
From: Seattle Area WA
Pushrods are straightforward, just use the stock ones and order a plastic pushrod checker while you are at it. Even the Fel Pro 1010's are .039" thick. I'd still use a head gasket in the .015"-.028" maximum thickness for your application.
I think you will really like the performance of your selection as long as you pay attention to the details. One of them keeping a tight quench.
I helped a guy do a L48 top end last year. We used the IK180s, the Engle 1018H cam and Performer intake with the stock Q-jet and a recurved HEI distributor. You should have seen the smile on that guys face when he hit the pedal, its whole new ride now.
I think you will really like the performance of your selection as long as you pay attention to the details. One of them keeping a tight quench.
I helped a guy do a L48 top end last year. We used the IK180s, the Engle 1018H cam and Performer intake with the stock Q-jet and a recurved HEI distributor. You should have seen the smile on that guys face when he hit the pedal, its whole new ride now.
Last edited by Scott Marzahl; May 12, 2009 at 02:00 PM.
