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Old 05-26-2008, 07:25 PM
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question for you guys
on those heads I have posted in the post above here.
they have 2 sets of heads exactly the same except for one thing.
lock style is 10 degrees on one and 7 degrees on the other
here are the 2 listings:
http://store.summitracing.com/partde...5&autoview=sku
http://store.summitracing.com/partde...5&autoview=sku


whats the difference?
and
Do you guys think this head is a good choice for my application?

Thanks
Stuccoman

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  #32 (permalink)  
Old 05-26-2008, 07:45 PM
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I am reading on some other posts that if I use 210cc heads it will make the engine a "dog" in a heavy car.
should I be looking at 185 - 195 cc heads instead?
I am running in a 80 firebird and its plenty heavy.
thanks
Stuccoman
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Old 05-27-2008, 07:27 AM
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10 degree locks are better, however the springs look stronger on the 10 degree lock head. Could be springs for a roller cam and that could flatten your flat tappet cam. 7 degree locks are enough for your combo. Check the seat and at 0.500" lift spring force.

yes, 210 will be a little less responsive at low rpm compared to the smaller port heads, but with a 3.90 gear, 2800 stall, and 400 cid, it should not be a problem
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