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1. Performance drawbacks (score: 1): Author: Eric <eric@erickson.on.net>; Date: Wed, 02 May 2001 20:32:24 +0000; A simple question or two ;-) Is it damn inevitable that flat-top pistons and a ported/polished head will lead to run-on (dieseling)? Or pinging/pinking under load unless high octane fuel is used? Wit; /html/mgs/2001-05/msg00040.html (8,324 bytes)
2. Re: Performance drawbacks (score: 1): Author: Martin Frankford <martin@virtual-motors.com>; Date: Wed, 2 May 2001 07:47:39 -0500 (CDT); High compression causes preignition. Was your head shaved or your deck blocked? Either would have raised compression. Porting would have redeuced compression as it would have made the combustion cham; /html/mgs/2001-05/msg00042.html (8,097 bytes)
3. Re: Performance drawbacks (score: 1): Author: Eric <eric@erickson.on.net>; Date: Wed, 02 May 2001 23:58:17 +0000; Nahhh, no stroking, shaving or anything. Overbored just 40 thou and big valves. For any fellow sprinters out there... still just a standard engine :-) High compression pistons? I think I gained some; /html/mgs/2001-05/msg00051.html (8,218 bytes)
4. Re: Performance drawbacks (score: 1): Author: "Richard Spurling" <hobbes@senet.com.au>; Date: Thu, 3 May 2001 00:35:49 +0930; It's all part of the polluted water they sell as petrol here Eric. My beast is even less modified than yours and she now runs on Premium Unleaded - the so called Lead Free Super they sell now is muc; /html/mgs/2001-05/msg00053.html (8,619 bytes)
5. Re: Performance drawbacks (score: 1): Author: Stuart MacMillan <macmillan@home.com>; Date: Wed, 02 May 2001 09:43:48 -0700; Make sure your carburation is set for the proper mixture and then set the timing "by ear" for the gas you are using. By this I mean retard it to minimal (or no) pinging when you go up a moderate hill; /html/mgs/2001-05/msg00060.html (9,600 bytes)
6. Re: Performance drawbacks (score: 1): Author: Max Heim <mvheim@studiolimage.com>; Date: Wed, 02 May 2001 10:11:17 -0700; You could also try retarding the timing a bit. Maybe only for street use, and advancing it again on race weekends. It's easy enough to try, anyway... -- Max Heim '66 MGB GHN3L76149 If you're near Mou; /html/mgs/2001-05/msg00062.html (8,897 bytes)
7. Re: Performance drawbacks (score: 1): Author: "Brent Schwartz" <brentschwartz@qwest.net>; Date: Wed, 02 May 2001 12:45:32 -0500; Also running the engine a tad on the rich side might help the pinging and run-on but probably will sacrifice some economy and emissions. Brent /// /// mgs@autox.team.net mailing list /// (If they are; /html/mgs/2001-05/msg00065.html (7,511 bytes)
8. Re: Performance drawbacks (score: 1): Author: WSpohn4@aol.com; Date: Wed, 2 May 2001 17:59:23 EDT; No - proper chamber work can minimise this. Or pinging/pinking under load unless No solution for this other than good fuel or less ignition advance, although if you have hot spots (as your first ques; /html/mgs/2001-05/msg00076.html (7,587 bytes)
9. RE: Performance drawbacks (score: 1): Author: Joe Short <buster_balz@operamail.com>; Date: Thu, 3 May 2001 12:00:15 -0400; run-on but probably will sacrifice some economy and emissions. Be carefule about how rich you get. You don't want to wash down the cylinders. The DPO had done this on my car, the end result was pisto; /html/mgs/2001-05/msg00095.html (7,651 bytes)
10. RE: Performance drawbacks (score: 1): Author: Barney Gaylord <barneymg@ntsource.com>; Date: Thu, 03 May 2001 13:37:09 -0500; run-on but probably will sacrifice some economy and emissions. cylinders. The DPO had done this on my car, the end result was piston slap so bad it sounded like a rod knock. The only fix was to rebui; /html/mgs/2001-05/msg00105.html (8,848 bytes)

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