I visited my local auto machine shop (West Bay in Bremerton, Washington) and talked to Martin the machine shop manager. He offered to find a pair of heads with my casting number, 14102193 deck them to raise the compression to 10-1 and, for common sense reasons, perform a valve job before handing them to me for gooving. He would then take my stock heads as cores.
This way I can get the job done over a weekend and not be without the truck and not have to purchase a set of heads for the project.
I've also fitted the Helix tower under the throttle body but cannot yet tell if that alone has improved the fuel milage as it is claimed it will do.
TH
Hi all,
I've just purchased a 1988 GMC Jimmy with a Chevy 350 V8 motor. I need such a large vehicle as my hobbies require the towing of large trailers.
Therefore I need to get the very best mile-per-gallon figure I can.
Currently with a stock engine, K&N air filter and 3" bore exhaust i'm getting 15 mpg per US gallon (not towing).
I'm currently sourcing a rebuilt set of heads specifically to deck and groove them per the thinking and specifications of Mr Singh.
I also intend to install a shift kit in the transmission to hold the vehicle in 4th gear (again not towing)
Other ideas are water injection and a Helix throttle body spacer (which I have but have not yet fitted).
I'll keep you posted on the progress.
If anyone else is working on a similar path with a Chevy 350 I'd be pleased to hear fronm you.
Regards,
Trevor Heath Port Orchard, Washington USA
Post edited by: trevor, at: 2005/11/24 17:12
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