Old Project Revitalized - 56 Track Car

[mfain]

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.

 

[phantomjock]

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

 

[mfain]

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.

 

[phantomjock]

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

 

[mfain]

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

 

[phantomjock]

Pappy -

Sweet! That meat is gonna' tear some pavement!
Very nice restart on this projo.
I hope I may be worthy to follow on mine.

Cheers & Happy New Year! Jim

 

[mfain]

Thanks Jim, and Happy New Year to you!

Pappy

 

[mfain]

Finally got the motor on the dyno. 852.71 peak HP @ 7100 rpm, 685 peak torque @ 5900 rpm. Should be enough. 515 CI BBC, short stroke (3.875"), big bore (4.6").

Pappy

 

[SuperBuickGuy]

stout

 

[69427]

Finally got the motor on the dyno. 852.71 peak HP @ 7100 rpm, 685 peak torque @ 5900 rpm. Should be enough. 515 CI BBC, short stroke (3.875"), big bore (4.6").

Pappy

View attachment 2247

Sweet!

 

[rtj]

Nice, need a video when it is running.

 

[vette427sbc]

Awesome! Nothing like hearing a BBC at 7k+

Do you have any more photos of your C4 knuckles? It looks like in one of the pictures you had some bracing on the forward links?

 

[mfain]

Awesome! Nothing like hearing a BBC at 7k+

Do you have any more photos of your C4 knuckles? It looks like in one of the pictures you had some bracing on the forward links?

I'll go by the storage shed and take some pictures of the knuckles. I added an inner plate/brace that put the forward link bolts in double sheer, rather than just screwing into the upright in single sheer.

Pappy

 

[mfain]

Awesome! Nothing like hearing a BBC at 7k+

Do you have any more photos of your C4 knuckles? It looks like in one of the pictures you had some bracing on the forward links?

Here are the photos of the extra bracing on the rear knuckle. I added a coil-over pick-up and a plate to put the forward link bolts in double sheer. The other addition is a sway bar mount pick-up.

 

[vette427sbc]

Here are the photos of the extra bracing on the rear knuckle. I added a coil-over pick-up and a plate to put the forward link bolts in double sheer. The other addition is a sway bar mount pick-up.

Great idea! I really like the coilover pick-up. Thanks for the pictures

 

[mfain]

Still working on the Corvette, but in the meantime I was offered a beautiful trailer at a price I could not turn down. Almost new and very well equipped. A little bigger than I need (28' box), but oh well. My buddy who sold me the trailer is having a longer one built (34") so he can both Viper track cars in it!

 

[SuperBuickGuy]

wow, totally jealous, that's a beautiful trailer.

 

[mfain]

wow, totally jealous, that's a beautiful trailer.

Thank you!

 

[mfain]

A little fat on the AFR (especially 3500-4500 rpm) and only 34 degrees timing, so there is a little more in the motor with further tuning.

 

[rtj]

Nice, that should be a blast.

 

[mfain]

OK, just a short update to prove I am still working on this thing. Fuel Safe is building my new fuel cell - 19.8 gal, 1.79 gal trap door collector for road racing, Aeromotive A1000 in-tank pump, FIA pro cell bladder, remote fill. Aeromotive suggested I run a fuel cooler in the return line from the regulator, so I built a receiver duct for a 3" air hose that comes from one of the side scoops and a fiberglass container for the Setrab cooler and fan. Here are a couple of photos.

Pappy

 

[Red77]

I've got visions of this thing running at Le Mans. Just a crazy dream, but it's going to pack a punch wherever you run it.

 

[SuperBuickGuy]

I need to figure out why I can't see the pictures... something wrong on my end, but what.... dunno.

 

[vette427sbc]

Nice cooler setup!
Did Aeromotive say why they thought a cooler would be needed? Are you running a carb or EFI? Any PWM controller for the pump?

 

[mfain]

Nice cooler setup!
Did Aeromotive say why they thought a cooler would be needed? Are you running a carb or EFI? Any PWM controller for the pump?

This is an EFI - sequential injection with 115 #/hr injectors, Hogan intake, 2200 cfm Wilson throttle body, and a MoTec ECU. Aeromotive told me that since it was a road race car, I would not be at low rpm enough to warrant a PWM controller (like a street car would need), but they thought keeping the fuel as cool as possible was still important to pump life, so they recommended a fuel cooler in the return line. The pump is plate mount inside the fuel cell.

Pappy

 

[mfain]

A little progress. Some finish work and paint in the trunk and I can button that part up. Fuel Safe shipped my fuel cell today, so I should have it next week.

 

[rtj]

Looking forward to hear that car run. :thumbs:

 

[mfain]

Fuel cell arrived - exactly as I ordered it. Scott at Fuel Safe was very easy to work with and very responsive. Cell is FIA certified - powder coated .063" aluminum with an internal Aeromotive A1000 pump, -10 outlet, -8 return, and -12 vent.

Pappy

 

[mfain]

The things that don't slow me down. I had to cut the floorboard out of the trunk to install the Decalink rear suspension. then I had to build tunnels to make room for the exhaust over the new rear axles. Then, there was a filler door for the fuel cell (so I didn't have to open the deck lid to refuel), a "catch pan" around the fuel fill to keep spilled gas from going into the trunk, and, of course, bezels for the shock remote canister lines. The fuel cell also had the wrong flapper valves in the collector (I had ordered the NASCAR aluminum ones with O-rings), so I had to wait for those to be shipped. BUT, I am making progress.

 

[mfain]

Here is a better shot of how the fuel bezel fits.