Exactly what the title says. I bought a 1g head a while back, and that was back when I never thought to ask if it was a 6 or 7 bolt. It supposedly came off of a 1993 tsi awd manual trans. I havent been able to find anywhere how to tell the difference...
I bought a 1g head, how can I tell if it's a 6 bolt or not?
maximuspaynimus
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No, thats correct. 90-94 turbo heads have the same cam specs unless it's in an automatic car. NON turbo 4G63 cams are also obviously different.gay_for_miatas said:
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oh...ooops my bad, i guess i did know my dsm head flow stuff....i guess he was talking something different then what i was thinking...:wall:JaxTalonTurbo said:
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It says the m/t non-turbo car s have the same cams as the m/t turbo,JaxTalonTurbo said:
and the a/t n/a share cams with the a/t turbo.
With exceptions for the 1.8.
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168 Posts
Hmmm, it says the manual NT cars have same cams as turbo manual cars? Thats crazy, that differs than the service manuals used at our local shop, we went over this a couple of times, and I've had tons of heads taken over there. Thats crazy, I guess the only way to find out for sure would be to measure the lift or duration somhow and compare the two. I've always just swapped in the turbo cams when rebuilding an NA head anyways just for good measure.gay_for_miatas said:
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JaxTalonTurbo said:
Well, I'm gonna check with a local shop here that works on these and see what they have to say. I swear I'll burn this book. Theres bluntly some things wrong it sometimes.
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2,197 Posts
seefour said:
Haha thats pretty funny, post count doesn't indicate knowledge. I was wrong on the headstuds. But lets clear this up. The 1g 6bolt and 7bolt do have the same head. The 7bolt does have 11mm headstuds and the 6bolt does have 12mm headstuds, but the heads themselves are identical.
http://www.dsmtuners.com/forums/showpost.php?p=50429466&postcount=6
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230 Posts
So judging by that you could upgrade from a 7 bolt 2g head to a larger intake valve 7 bolt 1g head with no issues?punisher said:
Still confused on the cams.
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2,197 Posts
Yes. Well, the install will be the same as installing a 6bolt head except you don't have to re-drill the headstuds to 12mm.gay_for_miatas said:
http://www.roadraceengineering.com/1g2gheadswaptechtip.htm
Here's a breakdown of 1g cams. Its kinda long and there are a few worthless posts but there is good info.gay_for_miatas said:
http://www.dsmtuners.com/forums/showthread.php?t=17110&highlight=protractor
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