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TPI Tuned Port Injection discussion and questions. LB9 and L98 tech, porting, tuning, and bolt-on aftermarket products.

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Old 02-03-2001, 11:17 PM   #1
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Anyone running L98 aluminum heads?

I am considering purchasing a set of these heads for a very good price, but am a little wary of the high compression that will be produced. Any experience with such. Maybe increase the chamber volume 6cc to 64 cc to lower the compression?
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Old 02-05-2001, 12:52 AM   #2
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Quote:
Originally posted by TPIi:
I am considering purchasing a set of these heads for a very good price, but am a little wary of the high compression that will be produced. Any experience with such. Maybe increase the chamber volume 6cc to 64 cc to lower the compression?
Been running them for years, great head, IMO. As of right now, polishing the chambers on them. They are a low timing head, and with the polishing might even get em better. ie they like 28-32 total advance which is a good thing. I'm at 9.7 and wish it was more.
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Old 02-05-2001, 02:07 AM   #3
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I'm running them on my engine. My computed compression ratio is 10.3:1. I use 92 octane on the street and 100 octane at the track. Check my mods list in my sig.

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Old 02-05-2001, 02:07 AM
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