Shelby GT350 R heads done by Valley head service

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cjperformance
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Re: Shelby GT350 R heads done by Valley head service

Post by cjperformance »

KnightEngines wrote: Sun Jul 08, 2018 6:53 pm I don't know to be honest, owner says it's a unique balancer & must be retained, guy rebuilding it has never seen one before.
I usually just turf the old junk & fit new aftermarket ones, never paid much attention in the past!
Hey mate send me a pic of the balancer when you get it back if you dont mind. Im interested to see which one it is.
Cheers,
Craig.
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Re: Shelby GT350 R heads done by Valley head service

Post by KnightEngines »

Will do, or if you've got nothing to do sat morning shoot down & have a look for yourself - assembling it on fri/sat.
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Re: Shelby GT350 R heads done by Valley head service

Post by cjperformance »

KnightEngines wrote: Tue Jul 10, 2018 7:06 pm Will do, or if you've got nothing to do sat morning shoot down & have a look for yourself - assembling it on fri/sat.
Sounds good, what time are you there till on sat morning?
Craig.
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Re: Shelby GT350 R heads done by Valley head service

Post by KnightEngines »

Likely at least till lunch (1 or so), maybe later!
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Re: Shelby GT350 R heads done by Valley head service

Post by cjperformance »

KnightEngines wrote: Tue Jul 10, 2018 7:32 pm Likely at least till lunch (1 or so), maybe later!
Cool I'll try getting there before 1. Cheers
Craig.
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Re: Shelby GT350 R heads done by Valley head service

Post by piston guy »

The original GT350 balancers were simply the HiPo 289 ( thick with a bevel on the back side. The R model used the same dampmer but they were sent to Traco to get 360* marking added to them. The casting number in the center should say C50E .
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Re: Shelby GT350 R heads done by Valley head service

Post by KnightEngines »

Almost done, just have to fit up ancillaries next week & fix up a small crank in a rocker cover that opened up when I pulled them down.

Blower should be here in a week and a half, on the dyno in 2-3 weeks roughly.


ImageDSC00950 by tony knight, on Flickr

ImageDSC00951 by tony knight, on Flickr

ImageDSC00958 by tony knight, on Flickr

ImageDSC00966 by tony knight, on Flickr
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Re: Shelby GT350 R heads done by Valley head service

Post by Carnut1 »

Looks great as always Tony. I am interested in the plenum mods and any advantages of them. Thanks, Charlie
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Re: Shelby GT350 R heads done by Valley head service

Post by FuelieNova »

Great job... can't wait to see it on the dyno.
Something about this thread takes me straight back to the 70's, I had Ed Pink do a set of small block ford heads for me on a similar project. I went out to my garage and found the letter he sent me as a quote for the work. Amazed I still have it after all these years...
Keep the updates coming.
Tom
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Re: Shelby GT350 R heads done by Valley head service

Post by cjperformance »

Looks great in the flesh too.
Yes its a beveled back 289 hi-po balancer.
This thing will be a hoot to drive. A great mix of originality and a practical streeter. One happy owner coming up! :D
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Re: Shelby GT350 R heads done by Valley head service

Post by piston guy »

Carnut1 wrote: Sat Jul 14, 2018 9:17 am Looks great as always Tony. I am interested in the plenum mods and any advantages of them. Thanks, Charlie
The engine guys at Shelby's milled a 1/4" oval joining the left and right sides. They were the only ones that did it. I made a 1/4" spacer that was cut like that and didn't see any improvement.
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Re: Shelby GT350 R heads done by Valley head service

Post by KnightEngines »

Yeah, all I did was drop the divider between banks about 3/8" so each plane can draw from both sides of the carb, will help a little up top, but not a huge difference.
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Re: Shelby GT350 R heads done by Valley head service

Post by Carnut1 »

I can see dropping the divider to pull from all four barrels. Thanks, Charlie
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Re: Shelby GT350 R heads done by Valley head service

Post by piston guy »

"Back in the day" , I just added an open hole spacer. Less work same result.
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Re: Shelby GT350 R heads done by Valley head service

Post by cjperformance »

piston guy wrote: Wed Jul 18, 2018 10:52 am "Back in the day" , I just added an open hole spacer. Less work same result.
There could be another reason for modding the manifold rather than using a spacer such as height or looks etc.
Craig.
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