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Messages - gt350bp

Pages: [1] 2 3 ... 21
1
1968 Shelby GT350/500/500KR / Re: KR shocks
« on: May 07, 2022, 10:44:22 AM »
Just wanted to thank everyone for the input on the KR shocks. I think I'm going with the Gabriel shocks that NPD recommends. They have a rear shock that is longer and HD so I will use those and the recommended fronts. They are out of the rear AMK installation hardware at this time, so that will have to wait. The shocks have fine threads, so I'm not sure if that is appropriate for a late 68 KR? (July 26 th build) Anyone have any experience with the Gabriel shocks and how well they work?

Don
gt350bp

2
1968 Shelby GT350/500/500KR / Re: KR shocks
« on: May 06, 2022, 07:57:12 PM »
Looks like the Gabriel Classic shocks are made in straight and bulged tubes. The straight tube looks similar to the original pictured. Need to verify length for a KR with staggered shocks and the tube diameters. Might be a close replacement for a car that will be driven?

Don
gt350bp

3
1968 Shelby GT350/500/500KR / Re: KR shocks
« on: May 06, 2022, 06:07:27 PM »
Checked the Gabriel website and found a Classic shock that is 17.67 (extended) length and 10.56 (compressed) length rear shock for a Mustang. Would that be appropriate for a staggered shock KR. They also look like a straight tube. Checking the site for an appropriate front shock that might be able to add the discs to look like an original Autolite.

Don
gt350bp

4
1968 Shelby GT350/500/500KR / Re: KR shocks
« on: May 06, 2022, 02:17:01 PM »
My thought was to make them in two pieces and weld from the underside with shock extended?

Don
gt350bp

5
1968 Shelby GT350/500/500KR / Re: KR shocks
« on: May 06, 2022, 09:46:43 AM »
Thanks for the info! What is the diameter and thickness of the disc below the top bushing? Might punch out some two piece discs to replicate the front shocks. Looks like there are also holes in the disc. What is the size and location. Would anyone be interested in the discs if I decide to have them made?

NPD advertises Gabriel Shock that best replicate the original Autolites. It appears that they are noted as shorter than original fo the rears. I guess that is what Special Ed is referencing. Is there a correct shock to use for the fronts and rears?

If someone is already making the discs for the front shocks, I would rather not reinvent the wheel and will purchase a set.

Thanks you.

Don
gt350bp

6
1968 Shelby GT350/500/500KR / KR shocks
« on: May 05, 2022, 08:01:12 AM »
Can anyone recommend a set of shocks for a 68 KR that look somewhat original and are good for a car that will be frequently driven? It's time to remove the Koni's I installed 40+ years ago.

In addition, I think the front shocks get painted Ford Corporate Blue and the rears are supposed to be semi-gloss black with an orange paint marking for identification. The orange is on the build sheets I have for my car (#04412) Any detailing photos of the front and rear shocks would be great.

Thank you.

Don
gt350bp   

7
1968 Shelby GT350/500/500KR / Re: 68 KR tuning issue
« on: April 04, 2022, 06:30:23 PM »
Put the recommended #78 jets in the primary metering block as well as changed the power valve to a 5.5. Increased the primary accelerator pump nozzle to a #37. Set timing at 36 degrees total and 13 degrees initial in the mechanical advance MSD Pro Billet distributor. (Green spacer) Can finally pull out of the driveway without upsetting the neighbors! Still have a slight bog and surge just above idle at 25 to 30 mph.

Ordered a #40 accelerator nozzle for the next change.

Thanks for the recommendations and help, as I'm going in the right direction on the changes.

Don
gt350bp

8
1968 Shelby GT350/500/500KR / Re: 68 KR tuning issue
« on: March 31, 2022, 01:11:23 PM »
Want to be sure that the initial suggested is 12 degrees and then 26 degrees of advance for total 38 degrees? Factory setting is 6 degrees BTDC.

Thank you.

Don

9
1968 Shelby GT350/500/500KR / Re: 68 KR tuning issue
« on: March 31, 2022, 07:53:49 AM »
Engine builder got back in contact and confirmed 10.5 compression ratio and suggested 38 degrees on the timing. Initial is at 6 BTC.

Made the carburetor changes yesterday but was unable to take for a test drive. The changes were that I installed a 5.5 power valve and changed primary jets to #78's. Increased primary nozzle to #37 and secondary nozzle to #35. Not sure if the weather is going to cooperate today as we are bracing for some bad thunderstorms moving into Central Florida.

Don
gt350bp

10
1968 Shelby GT350/500/500KR / Re: 68 KR tuning issue
« on: March 28, 2022, 08:42:44 PM »
What jets, power valve and carburetor are you using in your 482 Side Oiler? Looks like we are chasing the same issue. Tomorrow, I intend to change the primary jets to #78's and I think the power valve to a 5.5.

Today with the increased nozzle size to a #35 and green accelerator pump cam in the #2 position, the car was at least somewhat drivable leaving the neighborhood. Once it is rolling, hold on!

I believe it is about 10.5 compression with the Edelbrock aluminum heads with a KCR stage II matching and porting. I'm using a fuel mix at about 96 calculated octane with the additive. I requested the additional information on the engine build and tuning today from the builder. The balancer is marked at 6 BTC, 34 degrees and 40 degrees. Have not touched or moved the timing as the engine was a custom stroker, pan to carburetor / water pump to aluminum flywheel.

Don
gt350bp

11
1968 Shelby GT350/500/500KR / Re: 68 KR tuning issue
« on: March 28, 2022, 01:59:49 PM »
Checked the dyno sheets and it indicates 40 degrees timing. I have not changed the timing from when the engine was built and dyno'd. The change to a #35 nozzle and green accelerator pump cam helped, as the sputter is gone but still have a bog. I'm going to try the #78 primary jet but I'm still wondering if I should change to a 5.5 power valve?

Thank you.

Don
gt350bp

12
1968 Shelby GT350/500/500KR / Re: 68 KR tuning issue
« on: March 28, 2022, 08:06:05 AM »
Now I'm totally confused with my tuning issue. Maybe the backfire description is incorrect, as I'm getting a bog with a sputter / pop and need to feather th throttle to keep the car running. I felt that the car at low vacuum under initial load was running out of fuel and needing to feather the throttle was indicating the need for additional fuel from the accelerator pump?

The car runs fine under no load and has a good idle as well as crisp throttle response. When letting out the clutch in first gear, if you don't dump it and be at about 1,500 to 1,800 rpm it sputters and can feel an actual shutter through the power steering.   

13
1968 Shelby GT350/500/500KR / 68 KR tuning issue
« on: March 27, 2022, 09:30:43 AM »
Need help / advise on issue with a 482 custom stroker crate engine tune. I'm still getting a serious bog under load. I'm using a Quick Fuels Q-Series 750 with the following current settings. They are as follows:

Primary jet #74
Secondary jet#84 with jet extensions
Primary power valve #45
Secondary power valve: plugged
Primary nozzle: #31
Secondary nozzle: #31
Accelerator pump: 30 cc primary & secondary
Pump cam: Pink #2 position

Cam is a Comp Cams solid roller
Intake: .691
Exhaust: .702
Lobe separation 112 degrees

Idle set at 950 rpm with 9" vacuum. Vacuum increases to approximately 14" at 2,000 rpm (checked with no load).

When trying to get the car moving, I'm getting a terrible bog and a slight lean backfire, so I know I need to get more initial fuel with the accelerator pump and cam as well as increasing the primary nozzle. I'm think I need to go to the green cam #2 position and increase to a #35 primary nozzle. My question is do I need to change the power valve also or? I'm lost on how to best size the power valve. The idle vacuum seems like the #45 is OK, but I don't know if I should change to a #55 or #65.

The engine dyno #'s are very good, but it was dyno'd from 4,600 rpm to 6,600 rpm, so no info on low end.

Any help or advise is greatly appreciate. The neighbor are starting to get angry with the holeshots to get the car moving.

Thank you.

Don
gt350bp 
 

14
1965 GT350/R-Model / Re: R-Model Aviaid Oil Pan
« on: March 23, 2022, 12:30:25 PM »
Does it have the old Van Nuys Aviaid address on the sticker? 

Don
gt350bp

15
1965 GT350/R-Model / Re: R-Model Aviaid Oil Pan
« on: March 23, 2022, 12:10:53 PM »
Probably 002 with the non-operable side windows. It also had a L.H. lower radiator hose location that required a pipe to work with the R.H water pump!

Don
gt350bp 

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