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voitureltd voitureltd is offline
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Join Date: Feb 2008
Location: Bayside Wi
Posts: 2,553
Originally Posted by 911st View Post
People keep saying the SC give more low end and the C2 more top end.

I suspect this has more to do with how people are timing them when they set up there motors.

SC can be timed to make peak HP at any where from 5500 (most do this) to 6000rpm or so.

The C2 cams having more lift I am guessing can not be advanced as much with out worrying about clearance. The C2's make peak at about 6100rpm I understand of timed to stock N/A specs.

I think the SC dose have a bit higher effective compression so that might be part of it.


Also, as to the Group B cam, I thought is was more of a high rpm cam. I suspect is can be timed that way but it seems the Group cams made peak HP at 5500 unless that was miss leading info.

They also said they made about 360hp at 1 - 1.3 bar.

.9 bar on a prepped 930 motor of such a build can make 390-400hp.

Take it to 1.3 bar and 450+ hp could be possible with fire rings, inter-cooler, cams, zork, and 1.3 bar if they could use a larger turbo and or open up the intake ports a bit.

If anyone has more info on the actual Group B builds I would love to see it. Might be fun to build a vintage/DE car along the same specs. Especially if it has a boost knob between the seats.
This car has group B cams

I have heard from others the motors were tested open exhaust at what boost level I do not know but maxium set up overall I would assume. . So now after the US restrictions, who knows. We just had the turbo out for oil seals to Bob @ Durabilt turbo rebuilders Chicago. They usually have a 1 day turn around however he said the turbo rebuild parts took a week to get as the Turbo was a race hybred and was similar to the much later KKK 7200s inside. Anyway I do not know what that has to do with the HP output other than he said it was well suited for the motor spec, by it's internal condition.img][/img]
Anthony @ Voitureltd Bayside WI.

Last edited by voitureltd; 01-30-2010 at 02:59 PM..
Old 01-30-2010, 02:44 PM
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