Another S4 rebuild

[crafty]

My brother and I bought a pair of S4s to race in Australia.

The yellow one is his, and is in running condition. It's got a 711 block in it which is not eligible for historic racing, but is ok for regularity events. The plan is to change that at some stage.

The red one is mine and hadn't run for at least 8 years. I'm going to get it log booked and race it, so the engine, gearbox, diff, brakes and suspension will be done now. I currently live in Hong Kong, when I move back to Oz in a couple of years I'll strip it down and do the chassis and body.

So.... Before Xmas it was engine and box out

[crafty]

.... And now we have a rebuilt engine. Steel crank, forged pistons and rods, new SAS head, new 45webers etc.....
Gearbox has quaife staight cut close ratio dog shift internals.

[S47]

Nice one, engine looks like New

[mickrick]

That twink looks lovely now! Keep the thread going.

[Eugene7]

Looks great - love to see these old bathtubs being restored!

Mike will be along in a moment

[Kghaas]

Realy nice engine!
What power output are you expecting?

Another question: Is historic homologation papers available for the S4?

[PhilipRJ]

Can I sense a little 'beat my brother at all costs' going on here ?

[crafty]

S47 said:

Nice one, engine looks like New

Yep...... Not much of the old one left

PhilipRJ said:

Can I sense a little 'beat my brother at all costs' going on here ?

Hahahah.... That's what he said!

[crafty]

Some progress shots. Its now at the fabricators getting a roll cage and headers.

[Kghaas]

Some really beautiful work going on here, but it also raises some questions..
What is the break/clutch pedal setup, and what is the blanking plate on the side for?

Some detailed description of the cage would also be interesting. I will make one this winter and it will have a removable front section. I guess you guys will have a fully welded one for racing.

Keep up the good work!
Also back to my earlier question; does the S4 have historic FIA homologation papers or are you building to a local class spec?

Would be nice to hear what you think of doing to the brakes (except for the mystery black box/pedal combo)

Edited by Kghaas on Monday 15th July 12:55

[crafty]

Inside the black box is a Tilton top hung pedal box, we made our own throttle pedal. I'll get some more photos of the setup when the car comes back.

[crafty]

Exhaust is done (apart from tail pipe to direct exhaust away from the rear tyre) - tuned length based on engine builder's specs. Burns Stainless collectors and muffler - very nice stuff
Roll cage nearly done (but no pics yet)

[Kghaas]

Nice
Looking forward to see the rollcage.
I also stumbled across a youtube file the other day...

[crafty]

[Kghaas]

Looks like a solid rollcage.

Could you please give me the measure from top of the front rollbar to the dash? I realy like the angle of the top bars. It gives the car a more agressive look.

I am thinking of doing something similar to this, but with the front removable. I will also include removable sidebars. Its a project in the distant future...

[mickrick]

What´s the black car in the background?

[crafty]

Cage and headers now complete on my brother's car also.

[Buckssa]

You guys are doing a great job, the cars look great. Busy with my own S4 and was looking for some information about the coil springs. Do you have dimensions? Free length, no. of coils, ID, wire dia. Bought Spax dampers but not the coil springs. Got a spring manufacturer who will coil some up for me.

[crafty]

... just about done!!!

[crafty]

Buckssa said:

You guys are doing a great job, the cars look great. Busy with my own S4 and was looking for some information about the coil springs. Do you have dimensions? Free length, no. of coils, ID, wire dia. Bought Spax dampers but not the coil springs. Got a spring manufacturer who will coil some up for me.

The yellow car has Spax shocks, the Red one has Konis. Both are using 260 lb/in front and 104 lb/in rear based on another racer's recommendation.