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1982 3.0L questions
I've got a stock 3.0 that I'm putting in my 71T. The dizzy has been recurved and I have SSI's. I'm set to buy PMO's and they suggested I port my intakes from 34 to 38. I was told this can be done safely on an engine stand with the intake valve closed and a rag stuffed in. Then turn the engine upside down and take the port out to 38 and vacuum out the chips. No sanding as this would require the engine to be disassembled and cleaned. Then move to the next port. I would have a machine shop do this. Supposed to be worth about 10 HP. Has anyone done this?
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1971 Light Ivory 911T - Gretchen - sold Looking for Engine # 6114097 2010 Cayman |
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11-26-2015, 06:56 AM
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Join Date: Oct 2014
Posts: 614
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No, Richard suggests this and I honestly don't know one person who can do this. I searched in my area for quite a while and found nothing. It's going to be very difficult to to find someone to do this, IMHO.
That said, I have the same motor and bought the smaller intake manifolds with 46pmos. Car runs brilliantly. Unless your gonna pull the heads and do cams or a full rebuild, I suggest just getting the smaller manifolds for now. |
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11-26-2015, 07:37 AM
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Interesting that you went 46, not 40. I always thought that a stock 3.0l would do best with 40's. I'm not an expert, but I've read stuff on the internet��
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1971 Light Ivory 911T - Gretchen - sold Looking for Engine # 6114097 2010 Cayman |
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11-26-2015, 07:46 AM
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Posts: 614
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i went with 46's because i bought them used on the forums here from a member (pu911), (i thought i got a good deal) who ultimately screwed me over with a set of cracked carb botties, which i never received a refund from the seller.
anyways my plans are to go with a 3.2ss and i felt 46's may be better for that. |
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12-01-2015, 07:22 AM
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Join Date: Apr 2007
Location: I live on the road, I just stay here sometimes...
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I am VERY happy with my 46s on my ported 3.0!
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73 RSR replica (soon for sale) SOLD - 928 5 speed with phone dials and Pasha seats SOLD - 914 wide body hot rod My 73RSR build http://forums.pelicanparts.com/porsche-911-technical-forum/893954-saving-73-crusher-again.html |
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12-01-2015, 08:18 AM
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Air Medal or two
Join Date: Jul 2003
Location: cross roads
Posts: 14,079
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Porting - a religion and science mixed-
I have done a few different kinds of heads including my 911 A stock 2.7 C/R stock induction, home made exhaust . Boat tail mains, polished pistons , polished valves. It pulled 165 HP / TQ @ Rears on about a 50 OAT, about sea level ..Not too shabby if I may say so. My point to make - some of the most crucial points are the valve ridges, the protrusion between seats and heads are often standing proud . None of this you will get at with the heads attached .
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D troop 3/5 Air Cav,( Bastard CAV) and 162 Assult Helicopter Co- (Vultures) South of Saigon, U Minh Forest, Delta, and all parts in between |
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12-01-2015, 08:22 AM
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