its about that time for my opti. i need a new one but which one is better vented or unvented
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Sorry officer, im not speeding... Im qualifying
Daily Driver:1990 ford probe 5 speed with like 13 horsepower at the crank.
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what is an opti?...something to do with the ign??
i know im slow lol
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Re: vented opti vs. unvented
Generally the vented is looked on as being better.Originally posted by lt1maro
its about that time for my opti. i need a new one but which one is better vented or unvented
However, it's not just a one for one swap. If you're a 93-94 and have a non-vented, you'll need the following for a vented swap:
95+ timing cover
95+ timing set or aftermarket equvilant
Vented Opti
Vented Opti electrical wiring harness (some minor fab to the plug is necessary but not hard)
Vented Opti Vaccuum harness
Lengthened dowel pin on the camshaft to drive the opti.
I want to say that's it, but I could be missing something. The nice thing about the conversion is that you will subsequently have the ability to run an LT4 Extreme Duty or Cloyes true roller timing set.Comment
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Optispark is the front-mounted distributor on the Gen 2 SBC LT1 engine, driven off the nose of the cam. In addition to the usual "cap & rotor", it includes an optical cam position sensor. The sensor is obviously critical to the sequential fuel injection timing, in addition to the normal spark timing.Originally posted by Mike71
what is an opti?...something to do with the ign?? i know im slow lol
While the optical sensor provides an extremely accurate, low scatter spark timing, the entire distributor is susceptible to moisture buildup and corrosion caused by the ozone generated by the high voltage discharge. And it has a very low quality shaft bearing that can wear prematurely. Often, the moisture comes from the weep holes in the water pump, which is right above the distributor on the front of the engine.Fred
381ci all-forged stroker - 10.8:1 - CNC LT4 heads/intake - CC solid roller - MoTeC engine management - 8 LS1 coils - 58mm TB - 78# injectors - 300-shot dry nitrous - TH400 - Gear Vendor O/D - Strange 12-bolt - 4.11's - AS&M headers - duals - Corbeau seat - AutoMeter gauges - roll bar - Spohn suspension - QA1 shocks - a few other odds 'n ends. 800HP/800lb-ft at the flywheel, on a 300-shot. 11.5 @ 117MPH straight motorComment
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Re: vented opti vs. unvented
You have a 95. It's vented. That's what you want. Simple.Originally posted by lt1maro
its about that time for my opti. i need a new one but which one is better vented or unventedRob B 95Z A4 Tech Page (Part numbers / locations, how to's, schematics, DTC's...) Home Page - shbox.comComment
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Guess I could have saved some finger wear if I looked at his sig huh???
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ahh hey thanks for the great explination...im take it my 71 wont have that lolComment
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is there a way to visually tell the difference between the two
Sorry officer, im not speeding... Im qualifying
Daily Driver:1990 ford probe 5 speed with like 13 horsepower at the crank.Comment
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