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Brando
 
quattrorunner's Avatar
 
Join Date: May 2006
Location: St. George Utah
Posts: 6,518
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What the heck

I just picked up a 77 with 2.7 this weekend. Here is what I know:
It requires premium gas. It has updated tensioners and fan + 183000miles so we know it's been rebuilt. It has similar power to my sc that ran well. It never got over 210 degrees in some really spirited driving 100mph for 10 mins.
Thats it. Thats all I know as the previous owner had no papers. What gas did the original need? I used regular in the sc but this clearly needs higher octane. Would it be safe to say it's got higher compression pistons? It still has cis so not too high I guess.
Anyone want to venture what I might have?

Old 01-19-2011, 08:50 AM
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You have an unknown engine that burns premium gas......enjoy!

-Andy
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72 Carrera RS replica, Spec 911 racer
Old 01-19-2011, 02:33 PM
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Less brakes, more gas!
 
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Join Date: Jul 2005
Location: Stuart, FL
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hrmnn... sounds like you have a running engine
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Michael
'82 Euro SC 'Track Rat' 22/29 Hollows, 22/22 Tarrets, Full ERPB F/R, Rennline Tri Brace, Glass bumpers, Pro 2000's, 5 pts, blah blah blah
'13 Cayenne GTS
Old 01-19-2011, 07:11 PM
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Who told you it needed premium gas? IMO all these cars need premium gas.

If you think you need it due to detonation, that could be a function of the timing? Have you checked the timing? Plug Gap? Altitude where you are driving? Intake system? Was it a recurved Dizzy? Have you had compression test, leak down? Not enough information to get a coherent response.

If you drop the engine and show us what you have, Im sure some experts can chime in...


Quote:
Originally Posted by quattrorunner View Post
I just picked up a 77 with 2.7 this weekend. Here is what I know:
It requires premium gas. It has updated tensioners and fan + 183000miles so we know it's been rebuilt. It has similar power to my sc that ran well. It never got over 210 degrees in some really spirited driving 100mph for 10 mins.
Thats it. Thats all I know as the previous owner had no papers. What gas did the original need? I used regular in the sc but this clearly needs higher octane. Would it be safe to say it's got higher compression pistons? It still has cis so not too high I guess.
Anyone want to venture what I might have?
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83 SC Targa -- 3.2SS, GT2-108 Dougherty Cams, 9.5:1 JE Pistons, Supertec Studs, PMO ITB's, MS2 EFI, SSI's, Recurved Dizzy, MSD, Backdated Dansk Sport Stainless 2 in 1 out, Elephant Polybronze, Turbo Tie Rods, Bilstein HD's, Hollow 21-27 TBs, Optima Redtop 34R, Griffiths-ZIMS AC, Seine Shifter, Elephant Racing Oil Cooling.
Old 01-20-2011, 04:25 AM
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Brando
 
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Join Date: May 2006
Location: St. George Utah
Posts: 6,518
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Ok, it's definatly a 77 2.7 case. I'll check ignition timing and see if that's off. Case #6270937

Old 01-20-2011, 05:36 AM
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