Question about 1989 Toyota Supra

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Can I use a non turbo head on a turbo?

I have 1989 Toyota Supra Turbo 7m engine. would like to know if a non turbo head is interchangable?

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  • Toyota Ed May 11, 2010

    No. The non-turbo head has a higher compression aspect. If you were to install the NT head on a turbo car, you would have detonation problems really bad. Additionally, the valve length will impact the piston tops.

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Yes! all 7M engine are compatible. I used 7M head from a non turbo. it works they are the same head.

Posted on Jan 20, 2010

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Yes the heads are interchangable. Best way to find out if stuff is interchangable is to go to Toyota dealer and compare part #'s

Posted on Aug 18, 2009

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