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Santa Clarita, Ca.
Join Date: Nov 2007
Location: Bakersfield, Ca.
Posts: 222
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CDI's; Permatune vs. Bosch
I've read threads where people prefer the Bosch CDI (3 pim) to the Permatune. Does anybody have some hard data on why the Bosch is better?
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03-12-2010, 09:29 PM
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Burn the fire.
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I've seen waaaaay more permatune units fail compared to OEM Bosch units.
Although, an upgrade to an MSD unit is better than the Bosch CDI.
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[x] Working | [_] Broken: 2017 Victory Octane [x] Working | [_] Broken: 2005 Ram 1500 SLT w/5.7L Hemi "Drive it like you stole it." |
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03-12-2010, 09:56 PM
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Registered
Join Date: Jul 2007
Location: S.F. Bay Area
Posts: 534
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Quote:
Permatune units do fail a lot more often! I've had one fail on me already and a friend of mine just had his fail on him a couple of months ago. Go with a Bosch unit! |
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03-12-2010, 10:31 PM
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Registered
Join Date: Oct 2005
Location: Capistrano Beach, Ca.
Posts: 7,235
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I don't think you'll get any "hard data", as in records of units failing or comparisons of length of time before failure--you'll get lots of anecdotal information however (like the above posts) which has led to the consensus that Bosch is the unit to choose.
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L.J. Recovering Porsche-holic Gave up trying to stay clean Stabilized on a Pelican I.V. drip |
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03-13-2010, 06:38 AM
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Somatic Negative Optimist
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No contest.
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1980 Carrerarized SC with SS 3.2, LSD & Extras. SOLD! 1995 seafoam-green 993 C2, LSD, Sport seats.  Abstract Darwin Ipso Facto: "Life is evolutionary random and has no meaning as evidenced by 7 Billion paranoid talking monkeys with super-inflated egos and matching vanity worshipping illusionary Gods and Saviors ". 
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03-13-2010, 06:49 AM
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Make My Day
Join Date: May 2003
Location: Northern NY
Posts: 1,305
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no hard data, but if you go permatune make sure it's the blue and not the silver box
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74 911S Targa ROW Building Designer/Business Owner |
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03-13-2010, 07:18 AM
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1987 Targa,
Join Date: Feb 2010
Posts: 2
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The blue Perma-Tunes are 25+ years old. Most still work if you can find them.
The new ones are black from about 2004 on. The black ones are the latest ignition technology tailored for the Porsche. My buddy in Dallas dynoed an SC and got 9 HP over the MSD. He switched from the MSD because he was tired of replacing caps, rotors and spark plug resistors. No problems since then. |
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03-13-2010, 12:23 PM
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Registered
Join Date: Jan 2008
Location: Spring, Texas
Posts: 201
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I have PermaTune, not by choice, installed by the PO in 1992. When it went bad last year went back with PT...the 1st one out of the box was bad. 2nd one doing fine. If you go with PT rember to get a PT coil, Bosch is not compatable.
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Dan - schnell fahren, leben hart 83 RoW 911 SC Cab SCWDP Conspirator C.R.A.P Gruppe Registry #27 |
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03-13-2010, 01:47 PM
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Permatunes will fail intermitently, just cutting off/out while driving. Inquires to the Permatune folks kept resulting in statements that it must be my grounding. Replaced with bosch and have never had another problem.
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Robert Williams 70' 911T |
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03-16-2010, 09:37 AM
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Registered
Join Date: Oct 2006
Location: MYR S.C.
Posts: 17,321
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permatune is a reliabilty thing.
i dont think MSD is an upgrade to a stock engine except that the bosch units are old and the capacitors are going bad in them more and more. they can be repaired though. i have an MSD, but it was a cost issue for me, plus i like the fact that i can buy an MSD just about anywhere. on the down side, i can fix the bosch units. i had a permadoom in my car that went bad.
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86 930 94kmiles [_  _] RUNNING:[__] NOT RUNNING: ____77 911S widebody: SOLD88 BMW 325is 200K+ SOLD 03 BMW 330CI 220K:: [_ _] RUNNING: [__] NOT RUNNING:01 suburban 330K:: [_ _] RUNNING: [__] NOT RUNNING:RACE CAR:: sold |
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03-16-2010, 10:33 AM
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2017 Victory Octane
2005 Dodge Ram 1500 SLT
ME 262 (SOLD)
Colibri
Gas Mizer
Mileage King
Dog Bus
1970 Porsche 911T
