quote:
You can't run in Europe vintage racing series with that engine ... It's not FIA legal


Maybe if I paint it blue they won't notice !! Cool

Yes, I know it's not legal - my intention is to use it for the Danish Hillclimp series in the open class and maybe some invitational events where they have very relaxed ruling.

I'll need yet another engine if I'll do the historic races Embarrassed .
OK, I'm trying to get back into this project and find the time and motivation to carry on. So, here's a few updates I did sometime ago:

The factory gr4 cars had aluminum skins on the headlightbuckets, so I thought I would wan't that too :-). From an old rusty set of buckets, I made this set of lightweight headlight buckets with aluminum skin and all excess metal cut off.

Attachments

Images (1)
Again, as the factory cars ran quicker ratio steering (2.4) I wanted to add that to the car.
Thus, we did the "goodroc" quickrack steering rack conversion using a new Ford Escort MK1/Mk2 Heavy Duty short stem 2.4 ratio rack from Burton Power in the UK.

As described in Goodroc's thread, this conversion requires a little machining of the housing. Will be interesting to experiment with the position of the rack to evaluate the effect on bumpsteer.

Attachments

Images (1)
quote:
Get motivated


Ok then

Well, I suppose I was motivated enough to invest quite substantially in a set of high-end Intrax race coilovers specifically set-up for my car and it's expected use !

Expected track debut - who knows, 2025 ? Eeker

Attachments

Images (1)
Last edited by push1267
quote:
high-end Intrax race coilovers


Those are sexy! And you will be able to show them off looking very great for quite a while before you get road-grime on them!

Smiler

PS> I really enjoy this thread. You are doing great work.

Rocky
A little update on the brakes. Started playing around with some parts to make the Lockheed 8-pot calipers fit inside the 15" wheels.

Here are the 12-bolt AP 304 mm disc with hub, aluminum hat, screw-in studs and a small spacer.

Attachments

Images (1)
quote:
Enough room for the caliper inside the wheels it seems

Wow! That's impressive that you can fit 8-piston calipers inside the 15" wheel. Well done!
quote:
Originally posted by Push1267:
Well, I suppose I was motivated enough to invest quite substantially in a set of high-end Intrax race coilovers specifically set-up for my car and it's expected use !


Great choice! The one thing I did different, was to have them set up in colors to my taste, as flashy colors do not fit a 71 car imo ;-)

quote:
impressive that you can fit 8-piston calipers inside the 15" wheel.


The calipers were originally designed as F1 calipers in the early seventies, so they are designed to fit inside 13" wheels (I think that is what is used in F1?). Detomaso at some point in 1974-75 decided that they would homologate them for the Pantera.

Kid, you're right about the color of the coilovers, I should have thought about that !! :-). Red goes with the exterior of the car !!. What version of the intrax shocks are you using?

Attachments

Images (1)
Last edited by push1267
quote:
Originally posted by Push1267:
Kid, you're right about the color of the coilovers, I should have thought about that !! :-). Red goes with the exterior of the car !!. What version of the intrax shocks are you using?


1K2 with titan coating. Back then I just asked whether a black/grey finish was possible, which was, and as far as I can remember, at no extra cost (my invoice doesn't mention it as an extra neither). :-)
I've decided to take the nascar motor apart to inspect it, just to make sure everything is ok with it and to look into detuning it a little. So here's a little engine-porn

Attachments

Images (1)
Engine is a Nationwide/Craftsman Truck series roller motor

Heads are RoushYates CNC Ported D3s with jesel shaft mount rockers (ratio 2.1:1).

Intake is the last evolution of the Ford racing highport manifolds - also RoushYates ported

Attachments

Images (1)
The block is a Ford racing R451 dry sump block and is highly modified by RoushYates. Note that the block appears to have been polished/machined on all inner surfaces.

The lifter bores have offset bronzebushings and a cam tunnel is installed around the cam.

Not shown is the oil scavenge system that pull oil from the lifter valley via the dry sump pump

Attachments

Images (1)
I did a camera inspection of the cylinders showing bores to have been newly honed. There are very minor scuff marks in the bores on the piston skirt side of the bores. But, surely, it looks very fresh.

Attachments

Images (1)
The oilpan is a stainless steel pan fabricated (by Moroso for Roush I think) with 4 scavenge ports and an oil intake port for the 8 piston squirters.

Attachments

Images (1)

Pulled the pan of the engine today. Pretty trick stuff. 3.3 stroke crank that is highly polished and lightened, likely a Sonny Bryant product.

Rods are Plankl and pistons are Mahle with a bore of 4.154. Everything look good so far.

Attachments

Images (1)
Last edited by push1267
I talked to RoushYates (actually through SRI Performance which distributes Roush Yates parts) and they send me a 40 page file of the history of the engine. Last rebuild in 2010 before it was sold of. Hasn't been run since.

They included the dynorun after last fresh-up Eeker Eeker

Thinking about limiting the revs to 7000 ... Cool

Not entirely convinced that this is of my engine, as the roller motors usually does not rev beyond 9000 but parts in the engine does match the buildsheets

Attachments

Images (1)
What is Rousch recommended refresh/rebuild interval on the engine? I bet in NASCAR they tear them down after every weekend!

A lower rev limit would be wise to get longevity, but where is the cam happy for vintage racing?

If I drop my race engine shifts by 1000 rpm to 9500 I get maybe another 250 miles between rebuilds....
quote:
What is Rousch recommended refresh/rebuild interval on the engine? I bet in NASCAR they tear them down after every weekend!

A lower rev limit would be wise to get longevity, but where is the cam happy for vintage racing?

If I drop my race engine shifts by 1000 rpm to 9500 I get maybe another 250 miles between rebuilds....



Yes, Roush takes them apart every race and freshen them up - typically 400-500 miles. The files for this motor shows very detailed monitoring of each component with miles and last replacement. It's not clear how many miles they put on all parts, but some are replaced every race.

With the kind of racing I intend to do, I would expect a much longer service life. I may restrict it to 7500-8000 rpm, so it will not run anywhere near it's potential.

That was my initial thought about purchasing this engine, an engine with high quality parts that I can run below it's full potential with good durability. The 351C is just more fragile, and I'll only consider that if I wan't to run the FIA sanctioned races.

Regarding the cam, I ordered a cam degree kit, to help determine duration and lift. The files show a 325C cam (duration maybe), with lift around .825 in/ex.

I am considering increasing head gasket thickness (Cometic gaskets come in many thickness and are reusable), and reducing lift/duration by changing rockers arms. This engine run a 2.1:1 rocker arm ratio, and by changing that to maybe 1.9:1, lift is reduced by around 10% and duration profile is lowered too (by how much I'm not sure). Rocker arms are available used/new from Yates, at reasonable prices.

I cannot lower rpm too much as the D3 heads are ported for high rpm, - they flow around 420 cfm on the intakes.
There's an interesting article about them at D3 heads

/Kristian
Wow, wow, wow....it's been a while since I looked at your project and not sure where to start...but suffice to say your dedication to this project is incredible. There are so many nice parts and great craftsmanship going into your build....not sure which gets more drool....the chassis work, the motor, the hubs/brake hats/disc rotors, the brake calipers, the shocks, the motor, the valve train components, the motor crank & rods. Holy smoke, just fantastic! Your build is what so many of us just dream about at night!

Very long time since I updated this thread. Not much work going on sadly.

However, I thought it would be cool to do some historic graphics on the car. So here's what we came up with. Not all done and still need to change the Pantera script a little, it's too fat, but otherwise pretty close.

Replicating the Dubois car #2860 in it's 1972 Spa-Francorchamps livery.

Period correct yes, polically correct, not so much :-)

IMG_2607

IMG_2604

Attachments

Images (2)
Last edited by George P

Add Reply

Post
×
×
×
×
Link copied to your clipboard.
×