I have an LO3 Motor and am thinking about putting in Comp Cams Computer Compatible Camshaft for the 305 TBI. The new cam is not a roller so I was thinking about putting in a PJ Gear Drive (the noisy) to accomodate it. I have heard though that the noise makes the knock sensor think its knocking and advances the timing. Have any of you had experience with this?

 

theres been conflicting reports on this. I believe (not certain) Tim Burgess runs a gear drive on his 91 Z28 TPI that runs low 12s so obviously he doesnt have problems with false knock but you might want to ask him about it he moderates the electronics board

 

Hello

There are conflicting reports.
Tim and Willie both have a PJ nosiey gear drive and run the knock sensor without any problems.
I have the PJ noisey gear drive on my 85 Iroc and I had to disconnect my knock sensor because it was retarding my timing, I will be hooking up my autoX when I get a chance to see how much of a timing retard it is doing.
I have no driviablity problems with the knock sensor discounected either.



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Jamieson
85 Blue Super Charged Iroc-Z28 Camaro
79 TransAm
1991 RS
1999 Oklahoma Gathering
2000 SWMG

 

I'm running a Pete Jackson gear drive (noisy also) on my 327 with a knock sensor and it hasn't affected it any. The timing never changed at all.

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1992 RS
327, Modded TBI, Rebuilt WC T-5 5-speed, PRO 4 15" rims, Nitto's, 3.73's, SLP 1 5/8" headers, and a few other things.

 

they say not to use this on roller cams. Is that because of the roller cam or because most roller cams have computers and the computer(timing/knock sensor) is the thing that gets messsed upand not the cam?


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-Tas
'89 Formula WS6

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

Super GRK_Taz World
EFI & Intake Options
AOL IM: superGRtaz
ICQ 82881207

 

Here is my 2 cents. Run a roller cam otherwise you'll be buying pushrods and lifters. Run a true roller timing set ($61 Cloyes). Much less expensive than the gear drive ($138 Pete Jackson). Prices from Summit.

Why run the gear drive on a mostly stock engine? I'm not sure of the benfits.

[This message has been edited by Brent (edited November 03, 2000).]

 

I dont know about anybody else, but I almost got one for the noise alone. Glad I didnt now, since I might or might not have had problems with the knock sensor. I dont like guesswork.