I just wanted to know why we can't use the gear drives (for the cam) on the TPI engines?

 

The big reason I've heard of is that the gear sends vibrations through the engine. The knock sensor picks this up as detonation and retards timing. I don't know that the vibrations are constant, if they were the computer would back off timing as much as allowed. Your car will run like shlt.



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Joshua Johnston
1991 Z-28
Flowmaster
K&N
305 / 5spd. (Temporary)

 

You CAN use the Pete Jackson Quiet Gear Drive. Three years and going strong!!

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Willie

Supercharged 1987 305 IROC-Z, Daily-Driver, Emissions-Legal.
Former Paxton (6-psig): 12.57 @ 111 mph.
Former Paxton (6-psig) & former 50-hp nitrous: 12.04 @ 114 mph.
Current ATI D1SC (Initially 10-psig): Projecting high 11's.
Future ATI D1SC (15-psig): Gotta catch them pesky 26-psig boosted TTA's!!

http://willie.camaro-firebird.org/

1987 "20th Anniversary Commemorative Edition" Z28 Convertible -- Super Chevy Show Class Winner, 1998.

 

Ive got Willie beat, mines been on since 95

Gear Drive + Knock Sensor = Timing retard = MYTH

 

isn't the noise the whole reason for getthing them?

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-Tas
'89 Formula WS-6

305, TBI, auto, 14x3 chrome flat based open element with K&N, Milodon 160* thermo, functional Formula hood, cross-flow Flowmaster, '99z28 rear pipes and tips....

Soon to be installed:
Hooker 1-5/8" 50 state legal headers, Dynomax 3" I pipe (PN 44063 and 43248), Catco 3" cat, and injector spacer.

Super GRK_Taz World
F-Body Dual Exaust
EFI & Intake Options
AOL IM: superGRtaz

 

You betcha!

 

hey what is the part # for the noisy gear drive for mt 91 z28 305 TPI????

 

I stand corrected. You can use them. Pulling into a parking lot full of people, with a slight lump in the cam, and a gear whine is the best feeling in the world!!

------------------
Joshua Johnston
1991 Z-28
Flowmaster
K&N
305 / 5spd. (Temporary)

 

I have had my quiet gear drive on since '97... No problems yet...

You probably (might) will have problems with the noisey one though on a computer controlled car.... But I don't even think they make one for a roller cam... Could be wrong though....

 

I have yet to see a noisy drive for the roller cammed engines. No big deal, I think the quiet one is noisy enough.

 

yeah as far as i know there isn't a noisy drive for a roller cam....

------------------
Originating member of the SJNEP Crew
Member of the Jersey Fbody Crew(JFA)
Check out MyGTA Nicknamed:The Big Red Machine
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"What does not kill us only makes us stronger"

Tony

 

Thanks for all the input guys. Ive also heard the rumors that its has something to do with the knock sensor. Now here's another question, is there a way around the knock sensor? And would it be safe to bypass the sensor? Thanks again in advance.

 

ah damn, i wanted to run the noisy gear drive. damnit, now i have to go with the quiet one. Whats the quiet one sound like? i want to be able to hear this thing. Good thing i read this thread though, wouldnt have even thought of the knock sensor.

 

http://home.earthlink.net/~wtomfoster/gp.wav