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batchman · 09-28-2011

I keep thinking of these but am having a kind of classical year - you know, "baroque". OTOH I did skip buying tires this season so as to be able to address some things on the car.

Can you tell me what the change is from the porting to the head on a 91? By race class rules I can only go 1 inch into the head, and I worry that an aggressively ported IH/Plenum might make too big a step to take up in an inch.

Not to mention how would you go about making the shape to take up the step - a conical hone type of thing??

Has anyone ever bolted the likes of these on a virgin head? What kind of gains can be expected with the stock heads?

I would love to make these work; what the heck the rules allow it.... They'd even save a few pounds up high!

Thanks,
- Jeff

09-28-2011	#4
batchman Join Date: Jun 2009 Location: I live at Devens, one run at a time Posts: 454	Re: Ported Intake I keep thinking of these but am having a kind of classical year - you know, "baroque". OTOH I did skip buying tires this season so as to be able to address some things on the car. Can you tell me what the change is from the porting to the head on a 91? By race class rules I can only go 1 inch into the head, and I worry that an aggressively ported IH/Plenum might make too big a step to take up in an inch. Not to mention how would you go about making the shape to take up the step - a conical hone type of thing?? Has anyone ever bolted the likes of these on a virgin head? What kind of gains can be expected with the stock heads? I would love to make these work; what the heck the rules allow it.... They'd even save a few pounds up high! Thanks, - Jeff