Usdm 96 hla dohc heads on 2.2 t gasket and other questions.

Heads, valves, pistons, rods, crankshaft, etc...

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oldbugeye
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Usdm 96 hla dohc heads on 2.2 t gasket and other questions.

Post by oldbugeye » Tue Jun 20, 2017 12:31 am

I have searched quite a bit on here and haven't found exactly what I am looking for . Will I have head gasket issues with the big combustion chamber of the 96 hla head ? Can I use a thinner gasket to help compression? Some one built these heads and tapped them for turbo lines and I am building my motor and thinking about useing them . Anyone with experience and knows advantages or disadvantages of these heads would be appreciated. The more I read it seems like these are the wrong choice. But I have them and they are ready to bolt on .

zeke
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Re: Usdm 96 hla dohc heads on 2.2 t gasket and other questio

Post by zeke » Tue Jun 20, 2017 2:14 am

Ok I did this exact head swap on my ss a couple of months ago and I do not have any issues with the lower compression with the gaskets I used this is a link to the gasket set I went with https://m.summitracing.com/parts/cgt-c4 ... oCCOrw_wcB

I have a write up on here on how to adapt the Ej22t fuel rails onto the Ej25d manifold if you are running the stock injectors. I'm running the Ej25d camshafts still until I can get turbo cams but they run just fine. The car pulls way harder than it ever did with the sohc heads and I am very pleased with the daily drivableity of it. I'm running a Td04 and a sti Slanty intercooler. Do you have any mods done to your car or is it all stock still?

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91 ss Ej22t dohc td04 sti Slanty haltech elite 1500

oldbugeye
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Re: Usdm 96 hla dohc heads on 2.2 t gasket and other questio

Post by oldbugeye » Tue Jun 20, 2017 2:48 am

My car has turbo back exhaust td04 at 15 or so psi and a forester intercooler . Also a ton of suspension and brake mods . It just scares me the the 2.2 head gasket is slightly smaller bore than the combustion chamber on the heads . Do you know anyone else who has done this with the 96 heads ? Thank you for your info I have the 96 intake manifold and I also have a 20g intake manifold that looks like it will fit also so we will see which one I use .

oldbugeye
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Re: Usdm 96 hla dohc heads on 2.2 t gasket and other questio

Post by oldbugeye » Tue Jun 20, 2017 2:53 am

Also what cams work I have a set of 20g cams it was not the closed deck 20g . I don't remember if the heads were shim over buckets I would use those heads but the cam journals were bad .

zeke
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Re: Usdm 96 hla dohc heads on 2.2 t gasket and other questio

Post by zeke » Tue Jun 20, 2017 3:57 am

Its a 2mm difference which ends up to be a 1mm of open area which is tiny so I gave it a shot and so far so good. As far as the cams I'm not sure how to identify what cams you actually have maybe someone else on here knows. If I had an ej20g intake I would probably go with that one.

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91 ss Ej22t dohc td04 sti Slanty haltech elite 1500

oldbugeye
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Re: Usdm 96 hla dohc heads on 2.2 t gasket and other questio

Post by oldbugeye » Wed Jun 28, 2017 1:06 am

Has anyone else made these heads work ? I read on another thread on here to use the phase 2 2.5 head gaskets ? It would be great to get some more input before I bolt the heads on . Thanks

zeke
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Re: Usdm 96 hla dohc heads on 2.2 t gasket and other questio

Post by zeke » Wed Jun 28, 2017 2:46 am

You want the head gasket to match the bore I've read that the phase 2 2.2 might be an option but it may be too thin. From all the research I've done I couldn't find anyone but myself using this head and block combo. The only build I saw that was close to what I did was a guy over on nosiac that did it with a Ej22e short block and he said that he has no issues with it. I run my own car pretty hard with no issues either like I said I'm using the
.051 cometic mls gaskets and its going great still. Sorry I don't have longer time on this engine around 5000 miles so far. I would be curious to see if anyone else has tried this I really doubt I'm the first.

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91 ss Ej22t dohc td04 sti Slanty haltech elite 1500

oldbugeye
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Re: Usdm 96 hla dohc heads on 2.2 t gasket and other questio

Post by oldbugeye » Wed Jun 28, 2017 7:00 am

Well I got the gaskets that you used in the mail today my bearings and rings come on Friday . So we will see , I am skeptical about the longevity of the gaskets with the bigger combustion chamber . Thank you for all your help . It is cool to hear that you can feel a bit more power .

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