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  #1  
Old 06-01-2018, 01:34 AM
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Default Old Project Revitalized - 56 Track Car

I've been missing in action for a couple of years tracking an ACR and a Focus - got that out of my system. I'm not getting any younger so I decided I better get serious about finishing my old 56 Corvette track car that I have been "modifying" since 1975. I sold a couple of my old Corvettes for operating capital and I am devoting it all to finish the 56. So here's where I am. The car is caged, widened, and with a completed high travel/low roll front suspension. The rear suspension was a much modified C4-based system, but I was afraid it wouldn't be strong enough, so I just purchased a complete DecaLink from DSE with a hammerhead differential and 1200 HP axles. I am adapting the DecaLink to the C1 rear frame rails - should be fun. A couple of months ago I commissioned Larry's Engine and Marine (Tuscon AZ - renowned for their BBC offshore race boat motors) to build an all aluminum (Brodix) 515 CI big bore/short stroke (4.6 bore/3.875 stroke) motor with Calles crank/rods, 13:1 JE pistons, Comp Cams solid roller, TD shaft rockers, Dailey signature dry sump system, Hogan fabricated sequential injection intake system, and a Motec ECU. I just received my new Tilton bellhousing, rear mounted starter, and triple disk 7.25 inch carbon clutch. The transmission is a TKO 600 extreme built by American Powertrain that I have had for a while. I will post photos as things progress.

Pappy

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Old 06-01-2018, 12:50 PM
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Great, looking forward to the updates.
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Old 06-01-2018, 02:45 PM
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Didn't you have a watts link trailing link on your rear suspension? Always thought that was interesting.
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Old 06-01-2018, 04:45 PM
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Great to have you back and looking forward to your updates. :-)
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Old 06-02-2018, 01:45 AM
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Sounds like some serious hardware! Looking forward to the updates
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Old 06-02-2018, 05:31 PM
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Default Parts Photos

A couple of photos of some shiny new parts...

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Old 06-02-2018, 09:06 PM
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Is that Tilton piece considered a scattershield? Or do you run a blanket around it? Whats the front suspension consist of?
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Old 06-02-2018, 10:07 PM
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Is that Tilton piece considered a scattershield? Or do you run a blanket around it? Whats the front suspension consist of?
The Tilton bell housing is legal for NASA and SCCA road racing with the carbon clutch. It is the same set-up that was used on the NASCAR COT - not sure about the drag racing sanctioning bodies. It also serves as the mid-plate with a Competition Engineering motor plate up front. The front suspension is a custom fabricated, high-travel/low-roll design with long fabricated chrome-moly control arms, JRI triple adjustable shocks/coilovers, and a Speedway Engineering sway bar. All pick-up points are on slugs for adjustability and it uses a Sweet front steer power rack with a Woodward steering column. The uprights are ATS with ZR1 hubs, Howe NASCAR-spec zero friction ball joints, and big StopTech brakes.
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Old 06-02-2018, 10:33 PM
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Is that Tilton piece considered a scattershield? Or do you run a blanket around it? Whats the front suspension consist of?
The Tilton bell housing is legal for NASA and SCCA road racing with the carbon clutch. It is the same set-up that was used on the NASCAR COT - not sure about the drag racing sanctioning bodies. It also serves as the mid-plate with a Competition Engineering motor plate up front. The front suspension is a custom fabricated, high-travel/low-roll design with long fabricated chrome-moly control arms, JRI triple adjustable shocks/coilovers, and a Speedway Engineering sway bar. All pick-up points are on slugs for adjustability and it uses a Sweet front steer power rack with a Woodward steering column. The uprights are ATS with ZR1 hubs, Howe NASCAR-spec zero friction ball joints, and big StopTech brakes.
Very cool... wasnt aware that there are different specs for bellhousing/scattershields. Post some pictures of the front when you get a chance... Correct me if Im wrong but with that partsllist it sounds like youre drinking some of the Ron Sutton Kool-Aid too?
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Old 06-02-2018, 11:08 PM
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Is that Tilton piece considered a scattershield? Or do you run a blanket around it? Whats the front suspension consist of?
The Tilton bell housing is legal for NASA and SCCA road racing with the carbon clutch. It is the same set-up that was used on the NASCAR COT - not sure about the drag racing sanctioning bodies. It also serves as the mid-plate with a Competition Engineering motor plate up front. The front suspension is a custom fabricated, high-travel/low-roll design with long fabricated chrome-moly control arms, JRI triple adjustable shocks/coilovers, and a Speedway Engineering sway bar. All pick-up points are on slugs for adjustability and it uses a Sweet front steer power rack with a Woodward steering column. The uprights are ATS with ZR1 hubs, Howe NASCAR-spec zero friction ball joints, and big StopTech brakes.
Very cool... wasnt aware that there are different specs for bellhousing/scattershields. Post some pictures of the front when you get a chance... Correct me if Im wrong but with that partsllist it sounds like youre drinking some of the Ron Sutton Kool-Aid too?
Yeah, Ron is a friend of mine and we have had many discussions about suspension design philosophy. We agree on most things, except perhaps the IRS. He prefers an offset three link. I buy parts from him, and I was going to use one of his Race Warrior LS motors, but I built the car for a BBC a long time ago and I had collected a ton of good big block parts - plus I just like the brute power of a BBC - so that's what I stuck with.

I have a couple of earlier threads here (56 Corvette and Adjustable Front Suspension) where I uploaded photos of the front suspension under construction. I tried, but was unable to reload those photos - guess that's not allowed.

Pappy
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Old 06-03-2018, 03:46 PM
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exciting....we got new meat to throw in the cage.

keep us fed with pictures....looks cool, bob
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Old 06-05-2018, 12:21 AM
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Yeah, Ron is a friend of mine and we have had many discussions about suspension design philosophy. We agree on most things, except perhaps the IRS. He prefers an offset three link. I buy parts from him, and I was going to use one of his Race Warrior LS motors, but I built the car for a BBC a long time ago and I had collected a ton of good big block parts - plus I just like the brute power of a BBC - so that's what I stuck with.

I have a couple of earlier threads here (56 Corvette and Adjustable Front Suspension) where I uploaded photos of the front suspension under construction. I tried, but was unable to reload those photos - guess that's not allowed.

Pappy
Ill have to check out your earlier threads... Everytime I talk with Ron I learn something new. Hes been a great resource for info and parts as well. Keep us posted with your project!
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Old 06-22-2018, 02:51 AM
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Shiny new parts - yahoo

Pappy

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Old 06-25-2018, 10:47 PM
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Shiny new parts - yahoo

Pappy

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Talk about jewelry... Drysump stuff is ARE?
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Old 06-25-2018, 11:41 PM
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Shiny new parts - yahoo

Pappy

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Talk about jewelry... Drysump stuff is ARE?
Dry Sump is Dailey Engineering Signature Series. The pump bolts directly to the pan and eliminates the suction lines. The pump pulls directly from the sump.

Pappy
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Old 06-26-2018, 02:43 AM
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Wow, some nice pieces. Looking forward to hearing it run.

Hey, didnít you post a teaser picture a while ago of some carbon fiber air ducting for this car? How did they turn out? I might be confusing it with someone elseís project. If so, sorry.
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Old 08-02-2018, 04:05 PM
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Wow, some nice pieces. Looking forward to hearing it run.

Hey, didn’t you post a teaser picture a while ago of some carbon fiber air ducting for this car? How did they turn out? I might be confusing it with someone else’s project. If so, sorry.
Yes, I built carbon fiber ductwork for the front brakes. It worked out quite well. I will post some photos. In the meantime, here are some rather poor cell phone photos of the new motor in its current state. Hogan is doing some modes to the intake and the harness for the Motec ECU is in work. should have it on the dyno in the next month.

Pappy

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Old 10-06-2018, 04:13 PM
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Just got my Forgeline GA3Rs - 18X12 front and 18X`12.5 rear. I trial fit the fronts and the barrel cleared the control arms, tie rod, and sway bar up to 30 degrees of wheel turn throughout full suspension travel. I will mount the tires next week (335 front/345 rear) and verify the tire clearances. I don't expect any problems.

Pappy

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Old 10-06-2018, 09:21 PM
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Should be fun with that much rubber!
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Old 10-09-2018, 04:43 PM
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for some reason clicking your links gets me nothing but a wait icon....
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Old 10-09-2018, 06:45 PM
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for some reason clicking your links gets me nothing but a wait icon....
Which links? The pictures are showing up (on my computer) as thumbnail photos, but not as links to pictures.

Pappy
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Old 10-09-2018, 09:53 PM
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What backspacing is that? Im hoping I can get a similar amount of "lip" on my front wheels but an 18x12 with ~9.5" backspacing doesnt sound promising

Great wheel choice BTW!
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Old 10-09-2018, 10:49 PM
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What backspacing is that? Im hoping I can get a similar amount of "lip" on my front wheels but an 18x12 with ~9.5" backspacing doesnt sound promising

Great wheel choice BTW!
The fronts are 8.5 inch backspace which gives me a .375 inch scrub radius. I wanted to keep just a little positive scrub to account for tire deflection under heavy side load. The rears are 5.75 inch backspace to fit the Detroit Speed Decalink rear suspension.

Pappy
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Old 10-09-2018, 11:51 PM
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Here are the Tilton 900-series pedals that I just received. They have master cylinders that pivot at the front to keep the push rod in perfect alignment.

Pappy

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Old 10-10-2018, 08:22 PM
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335 and 345 Hoosier R-7s mounted on 12 and 12.5 inch Forgelines.

Pappy

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Old 10-10-2018, 08:59 PM
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Drool...

That is seriously bad ass
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Old 10-10-2018, 11:12 PM
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Pappy -

Good to see you on this one (again?) I had to do some track damage repairs on the SR this past week, and was reminded; How satisfying Body Work is/can be.

Post Michael (hurricane) and a race at Sebring - I think I'll get back on "Elvira" too. I've been inspired by your lead. Just took 2 years to get the axles done!

Your work is looking good! "Two's In!"

Cheers Jim
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Old 10-20-2018, 03:26 AM
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Motor update......jewelry

Pappy

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Old 10-20-2018, 03:21 PM
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It will be interesting to see what it weighs, a C1 race car with an alum block BB chev.
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Old 11-24-2018, 12:49 AM
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Decided it was time to get on with installing the Detroit Speed Decalink rear suspension. It was made for a C-2/C-3, so some modification was required. Luckily, I had already built the adjustable front link pick-up points when I installed the C-4 suspension, and they turned out to be in the exact correct position. That will save a lot of work.

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Old 11-24-2018, 01:37 AM
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A couple more photos. The differential is a Detroit Speed Hammerhead with 3:73 gears. The last photo is the C-4 stuff I took out - 4:11 posi, Driveshaft Shop axles, Tom's Differential stub axles and bearings. I was afraid it was not going to be strong enough for the new motor, and I wanted to get the axle shafts out of the suspension business.

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Old 11-24-2018, 10:28 AM
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Pappy -

Is that Detroit Hammerhead set up for the Porsche CV axle mounts? That will make it easier if so. But, you already know that. What uprights/bearings are you going to use?

After several years, Ive finally gotten my cut-down, cryo-treated, reassembled C5/6 CV axles in the garage.

It was a struggle, but spending 6 months a year away didn't lead to an effective timeline, or oversight.

Cheers - Jim
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Old 11-24-2018, 03:19 PM
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Pappy -

Is that Detroit Hammerhead set up for the Porsche CV axle mounts? That will make it easier if so. But, you already know that. What uprights/bearings are you going to use?

After several years, Ive finally gotten my cut-down, cryo-treated, reassembled C5/6 CV axles in the garage.

It was a struggle, but spending 6 months a year away didn't lead to an effective timeline, or oversight.

Cheers - Jim
Hey Jim,

Look at post 6 of this thread - there is a picture of the uprights and axles. The uprights are made by Detroit Speed using C7 bearings and the axles/CVs are their 1250 hp versions. Here is a photo of what the Decalink consists of - designed for the C-2/C-3. The Hammerhead is sold separately and is a pretty stout unit based on a Chevy 12-bolt.

Edit: I will check the bolt spacing on the stub axles - they are probably the same as the Porsche. Also, I believe DSE makes a conversion kit with stub axles set up for CVs and bigger side gears for increased spline axles that fit the C-3 differential.

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Old 11-24-2018, 04:11 PM
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Thumbs up Nice.

But YEOW! Not Cheap - but looks real quality.
Strong, Quality, Cheap - pick 2.

I let my Giovanni go for 25 cents on that dollar! Oh well, She Who Must Be Obeyed got a win!

Cheers - Jim
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Old 01-02-2019, 12:23 AM
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A short update. The DSE Decalink (5-link plus axle shaft) rear suspension is almost complete - cross member modified and welded in and differential front mount and forward link mounts finished. I will have Mark Williams build new forward links out of 1.25/.095 wall chrome moly tubing for the proper length and better strength with bigger Aurora heims. The 345 tires on the Forgelines fit perfectly. Motor is finished - just waiting to get it on the dyno.

Pappy

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