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RD911T RD911T is offline
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Join Date: Jul 2010
Location: Cape Girardeau, MO
Posts: 1,087
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Should I go CIS?

I'm slowly going through my 71 coupe to get it road worthy. As I've documented in another thread, I'm an hour or 2 from finishing the suspension and brakes. I bought a 3.0L motor without an induction system for it a while back. This motor has good leak down numbers and should be ready to go. Due to moving my business and other stuff, funds are a little scarce right now. I keep looking at different options for induction as it's my single largest expense left. I do need an oil cooler and lines, but that's another story.

PMO's are about $4400. I could buy some Weber's in the $1500-2000 range, but knowledgeable people on the board say I'm asking for trouble if I don't rebuild them and that would turn them into $3500 pretty quick. EFI is very appealing, but unless I cobble something together myself, it's approaching $4-5K. I don't have any machining equipment or experience to do something like that, so I'd need a turn key system on the mechanical side. I can handle the programming with my skill set and the help of a friend that's a programming whiz.

I've been watching the for sale board and recently saw a complete (supposedly) CIS system off a running 82 3.0L. This is the same year as my motor. I know I could get it cheaper, like under $500. Is this a rabbit hole I'm headed down? I've read enough about CIS to know when it's in good condition and running right it starts easy and provides good economy. The motor should have plenty of power to push my coupe very quickly no matter what induction system I use. It's a totally stock motor with the top end redone about 30,000 miles ago by a reputable guy on this board. I have had my dizzy recurved already by Barry.

Looking for input for the collective. If CIS is a decent way to go, how do I make sure I'm getting everything I need when I purchase a system?

TIA!
Tom
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1971 Light Ivory 911T - Gretchen - sold

Looking for Engine # 6114097

2010 Cayman
Old 09-22-2014, 06:47 AM
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