Shelby GT350 R heads done by Valley head service

General engine tech -- Drag Racing to Circle Track

Moderator: Team

cjperformance
Guru
Guru
Posts: 3186
Joined: Tue Aug 19, 2008 7:20 am
Location: South Australia

Re: Shelby GT350 R heads done by Valley head service

Post by cjperformance » Tue Jul 10, 2018 2:20 am

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.

KnightEngines
Guru
Guru
Posts: 1955
Joined: Fri Jan 09, 2009 8:51 pm
Location: Australia

Re: Shelby GT350 R heads done by Valley head service

Post by KnightEngines » 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.

cjperformance
Guru
Guru
Posts: 3186
Joined: Tue Aug 19, 2008 7:20 am
Location: South Australia

Re: Shelby GT350 R heads done by Valley head service

Post by cjperformance » Tue Jul 10, 2018 7:30 pm

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.

KnightEngines
Guru
Guru
Posts: 1955
Joined: Fri Jan 09, 2009 8:51 pm
Location: Australia

Re: Shelby GT350 R heads done by Valley head service

Post by KnightEngines » Tue Jul 10, 2018 7:32 pm

Likely at least till lunch (1 or so), maybe later!

cjperformance
Guru
Guru
Posts: 3186
Joined: Tue Aug 19, 2008 7:20 am
Location: South Australia

Re: Shelby GT350 R heads done by Valley head service

Post by cjperformance » Tue Jul 10, 2018 8:12 pm

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.

piston guy
Expert
Expert
Posts: 832
Joined: Mon Sep 10, 2012 1:55 pm
Location: Anaheim, CA

Re: Shelby GT350 R heads done by Valley head service

Post by piston guy » Thu Jul 12, 2018 1:51 pm

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 .

KnightEngines
Guru
Guru
Posts: 1955
Joined: Fri Jan 09, 2009 8:51 pm
Location: Australia

Re: Shelby GT350 R heads done by Valley head service

Post by KnightEngines » Fri Jul 13, 2018 11:43 pm

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

Carnut1
Guru
Guru
Posts: 3916
Joined: Tue Jun 11, 2013 6:32 pm
Location: Melbourne fl.

Re: Shelby GT350 R heads done by Valley head service

Post by Carnut1 » 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
Servedio Cylinder Head Development
631-816-4911
9:00am - 9:00pm EST

FuelieNova
Member
Member
Posts: 195
Joined: Sat Jul 10, 2010 3:48 pm

Re: Shelby GT350 R heads done by Valley head service

Post by FuelieNova » Sat Jul 14, 2018 10:15 am

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

cjperformance
Guru
Guru
Posts: 3186
Joined: Tue Aug 19, 2008 7:20 am
Location: South Australia

Re: Shelby GT350 R heads done by Valley head service

Post by cjperformance » Sat Jul 14, 2018 7:13 pm

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
Craig.

piston guy
Expert
Expert
Posts: 832
Joined: Mon Sep 10, 2012 1:55 pm
Location: Anaheim, CA

Re: Shelby GT350 R heads done by Valley head service

Post by piston guy » Tue Jul 17, 2018 12:18 pm

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.

KnightEngines
Guru
Guru
Posts: 1955
Joined: Fri Jan 09, 2009 8:51 pm
Location: Australia

Re: Shelby GT350 R heads done by Valley head service

Post by KnightEngines » Tue Jul 17, 2018 7:04 pm

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.

Carnut1
Guru
Guru
Posts: 3916
Joined: Tue Jun 11, 2013 6:32 pm
Location: Melbourne fl.

Re: Shelby GT350 R heads done by Valley head service

Post by Carnut1 » Wed Jul 18, 2018 8:17 am

I can see dropping the divider to pull from all four barrels. Thanks, Charlie
Servedio Cylinder Head Development
631-816-4911
9:00am - 9:00pm EST

piston guy
Expert
Expert
Posts: 832
Joined: Mon Sep 10, 2012 1:55 pm
Location: Anaheim, CA

Re: Shelby GT350 R heads done by Valley head service

Post by piston guy » Wed Jul 18, 2018 10:52 am

"Back in the day" , I just added an open hole spacer. Less work same result.

cjperformance
Guru
Guru
Posts: 3186
Joined: Tue Aug 19, 2008 7:20 am
Location: South Australia

Re: Shelby GT350 R heads done by Valley head service

Post by cjperformance » Wed Jul 18, 2018 5:15 pm

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.

Post Reply