CRG Discussion Forum

Camaro Research Group Discussion => Originality => Topic started by: canadair on August 02, 2012, 10:18:49 AM

Title: 69 z28 carb.insulater
Post by: canadair on August 02, 2012, 10:18:49 AM

Did the holley carb use a heat insulater between the carb and manifold on the 302 engine.   

Title: Re: 69 z28 carb.insulater
Post by: william on August 02, 2012, 01:04:35 PM

Depends on how "heat insulator" is defined.

Holley carbs used a gasket between the carb and manifold as shown in the assembly manual. They did not use a metal plate as some Quadrajets did.

Title: Re: 69 z28 carb.insulater
Post by: canadair on August 02, 2012, 03:57:09 PM

this insulater was a gasket and metal shield seperating heat from the intake maifold from the split gas lines.

Title: Re: 69 z28 carb.insulater
Post by: bertfam on August 02, 2012, 04:11:48 PM

If you mean THIS (http://www.ebay.com/itm/110926714783?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649) (P/N 3969835 for the Holley and 3969837 for the Q-Jet), it wasn't used in 1969. They started using these in 1970.

Ed

Title: Re: 69 z28 carb.insulater
Post by: william on August 02, 2012, 04:50:23 PM

I do not believe that was ever used in production.

Title: Re: 69 z28 carb.insulater
Post by: JohnZ on August 02, 2012, 04:58:16 PM

I remember an insulator/shield llike that being installed on an IROC Z/28 I had at the dealer as part of a TSB on fuel percolation/rough idle.

Title: Re: 69 z28 carb.insulater
Post by: 69Z28-RS on August 03, 2012, 05:21:07 AM

they do have a GM part number, and I recall seeing them around that time frame, but not on '69's..

Gary

Title: Re: 69 z28 carb.insulater
Post by: william on August 03, 2012, 02:06:02 PM

Holley carbs were phased out of production after '71; maybe the few '72 Z/28s built still used them. There are plenty of vintage magazine photos of those cars and none of them used it.