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Registered
Join Date: Aug 2007
Location: Ojai, CA
Posts: 508
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Ignition upgrades?
For an 8.5-1 comp ratio carbureted 2.7 rs motor, what is the ignition upgrade of choice? I like the electromotive hpv1 (obsolete) but still effective, or an MSD 6al box ?
Your thoughts please. Car is set up aggressively, but will not see track time, just canyon bonsai runs. Thanks for advice, Kevin |
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06-06-2011, 07:04 AM
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Max Sluiter
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I would just stick with the stock Bosch CDI and points. You could try an optical trigger or a magnetic pickup but it seems like they inevitably have problems. The points need maintainance/replacement at intervals but seem to just keep on working.
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1971 911S, 2.7RS spec MFI engine, suspension mods, lightened Suspension by Rebel Racing, Serviced by TLG Auto, Brakes by PMB Performance |
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06-06-2011, 09:10 AM
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Stock seems to work pretty damn well and I can't believe I have the org. CD unit in my car-that just amazes me. But I do have a crane fireball coil which I only installed when the org. coil gave up the ghost over 10 years ago.
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72 911 Although it is done at the moment, it will never be finished. |
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06-06-2011, 09:30 AM
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Registered
Join Date: Oct 2009
Location: Montmorenci, SC
Posts: 557
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You'll get about as many "thoughts" as there are Pelicans.. I run a 6AL unit on my car.. I have it mounted under the driver's seat.. I noticed an immediate idle qualiity improvement.. If you choose that set up, make sure you use the proper coil, depending on where you mount it.. If you have a point distributor, I'd use a Pertonix unit, I've had very good results with these units over the years.. If you are concerned about failure, put your points in the glove box; it's easy to change back. If your 6AL fails (rare) you can get one at about any local parts chain store.. Also, I would search the forum for previous threads and read up other's experiences..
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70 911T Sold  81 911SC Coupe84 Mustang Turbo GT 66 Galaxy 500 Ragtop (my Mother bought it new) 88 Thunderbird Turbo Coupe 69 Torino Cobra (R) Code |
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06-06-2011, 02:29 PM
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Banned
Join Date: May 2005
Location: Earth
Posts: 31,744
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I have a msd6al, with a new JBracing distributor. It's a pretty slick unit. It's just like the one for a twin plug, but it is for 6 plugs.
It is entirely adjustable for the advance curve and has a magnetic pick up. Works good. |
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06-06-2011, 02:53 PM
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Registered
Join Date: May 2001
Location: Peoples Republic of Long Beach, NY
Posts: 21,140
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carbs and an early S cam should have a distributor recurve from CIS curve imho
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Ronin LB '77 911s 2.7 PMO E 8.5 SSI Monty MSD JPI w x6 |
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06-06-2011, 07:06 PM
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1971 Porsche 911S
Tobluforu
