I just finished my racing 914 Options

[Bill's Racing 914]

I finally finished the 1970 Porsche 914 race car. I will race it in E Production in VARA on the West coast. Before and after pictures below.

It has five lug disc brakes. Stock 914 front rotors drilled and tapped to 5 bolt patter at a local machine shop. Stock 914 rear rotors drilled and five studs added by PMB Performance. BMW 320i front brake calipers, Porsche 911 rear calipers By PMB Performance. Lightweight Porsche 944 wheels. Turbo tie rods. Front adjustable sway bar and rear stock sway bar. Coil over Bilstein racing shocks in the rear. Dual downdraft Weber 40 IDF carbs on the 1.7L Porsche 914 engine. 15 gal ATL fuel cel. Side shift transmission. Racing headers with Supertrap exhaust. Racing fuel cel. Front mounted RX-7 aluminum oil cooler. Autometer racing tachometer with shift light. Tangerine Racing full roll cage. Fiberglass hood, front and rear bumpers....It is quite the little beasty. (IMG:style_emoticons/default/aktion035.gif)

[Randal]

Nice work and a ton of it for sure. Also like your choice of components! What did you do to the engine?

Can you run spoilers and splitters in your class?

[Bill's Racing 914]

Nice work and a ton of it for sure. Also like your choice of components! What did you do to the engine?

Can you run spoilers and splitters in your class?

Yes, I had to clean off every nut and bolt as I put it back together. Had I had a blaster, I would have stripped off all the old paint.

I had the heads rebuilt. I then put on the Dual 40IDF downdraft Webers. To make them work best, I just punched a 1/2 in hole in the firewall and ran the throttle cable straight back. I put a rubber grommet at the firewall. I used 2ft of 3/8in brake line as a sleeve for the cable from the pedal back to the seat. It is held down with metal clamps with rubber sleeves. There is just too much binding in the cable running it from underneath the car.

I also added the huge stock aluminum RX-7 oil cooler to the front. I used AN 10 steel braided lines. I am essentially cooling the engine with the oil. Will run the engine as stock till I get the handling sorted out. Then will move up to a competition cam, and higher compression ratio forged pistons. I am going to do a test day and try running it without an alternator like a formula car to see if I can do 20 laps...pretty much like how a super V runs.

To stay in VARA E Production, you can run a stock rear spoiler and the 915 front air dam. The best aero gain is from removing the windshield and lowering the car. That also helps to get air to the engine bay.

For a good aero analysis, take a look at the chart at the bottom of this link:

http://www.cassidy-online.com/porsche914/aerodynamic_aids/

But VARA is VERY flexible. If you wanted to run a wing etc. they will just bump you up to a GT class.

[brant]

I've never run VARA so take this with a grain of salt
but in other clubs I've run (SVRA, CSRG, HMSA, RMVR, CVAR) a stock motor is going to put you at a huge disadvantage in a 914

even in highly tuned state, an air cooled 914 is pretty under powered compared to the water cooled competition. The good drivers can still win due to handling, but they expect to get pulled down the straights by "built" 1275cc bugeye sprites and other water cooled small bores


I like your plan to get seat time, but eventually you will need that motor to run in the top half of the pack.


Nice looking car!
watch that fuel pressure gauge mounted to the motor
(although I couldn't tell if it was a rigid mounting from your picture)

I've seen brass fittings work harden and crack when mounted on motors
its a big fire if it happens.... so usually recommended to mount them onto the chassis

brant

Nice work and a ton of it for sure. Also like your choice of components! What did you do to the engine?

Can you run spoilers and splitters in your class?

Yes, I had to clean off every nut and bolt as I put it back together. Had I had a blaster, I would have stripped off all the old paint.

I had the heads rebuilt. I then put on the Dual 40IDF downdraft Webers. To make them work best, I just punched a 1/2 in hole in the firewall and ran the throttle cable straight back. I put a rubber grommet at the firewall. I used 2ft of 3/8in brake line as a sleeve for the cable from the pedal back to the seat. It is held down with metal clamps with rubber sleeves. There is just too much binding in the cable running it from underneath the car.

I also added the huge stock aluminum RX-7 oil cooler to the front. I used AN 10 steel braided lines. I am essentially cooling the engine with the oil. Will run the engine as stock till I get the handling sorted out. Then will move up to a competition cam, and higher compression ratio forged pistons. I am going to do a test day and try running it without an alternator like a formula car to see if I can do 20 laps...pretty much like how a super V runs.

To stay in VARA E Production, you can run a stock rear spoiler and the 915 front air dam. The best aero gain is from removing the windshield and lowering the car. That also helps to get air to the engine bay.

For a good aero analysis, take a look at the chart at the bottom of this link:

http://www.cassidy-online.com/porsche914/aerodynamic_aids/

But VARA is VERY flexible. If you wanted to run a wing etc. they will just bump you up to a GT class.

[Bill's Racing 914]

I've never run VARA so take this with a grain of salt
but in other clubs I've run (SVRA, CSRG, HMSA, RMVR, CVAR) a stock motor is going to put you at a huge disadvantage in a 914

even in highly tuned state, an air cooled 914 is pretty under powered compared to the water cooled competition. The good drivers can still win due to handling, but they expect to get pulled down the straights by "built" 1275cc bugeye sprites and other water cooled small bores


I like your plan to get seat time, but eventually you will need that motor to run in the top half of the pack.


Nice looking car!
watch that fuel pressure gauge mounted to the motor
(although I couldn't tell if it was a rigid mounting from your picture)

I've seen brass fittings work harden and crack when mounted on motors
its a big fire if it happens.... so usually recommended to mount them onto the chassis

brant

Nice work and a ton of it for sure. Also like your choice of components! What did you do to the engine?

Can you run spoilers and splitters in your class?

Yes, I had to clean off every nut and bolt as I put it back together. Had I had a blaster, I would have stripped off all the old paint.

I had the heads rebuilt. I then put on the Dual 40IDF downdraft Webers. To make them work best, I just punched a 1/2 in hole in the firewall and ran the throttle cable straight back. I put a rubber grommet at the firewall. I used 2ft of 3/8in brake line as a sleeve for the cable from the pedal back to the seat. It is held down with metal clamps with rubber sleeves. There is just too much binding in the cable running it from underneath the car.

I also added the huge stock aluminum RX-7 oil cooler to the front. I used AN 10 steel braided lines. I am essentially cooling the engine with the oil. Will run the engine as stock till I get the handling sorted out. Then will move up to a competition cam, and higher compression ratio forged pistons. I am going to do a test day and try running it without an alternator like a formula car to see if I can do 20 laps...pretty much like how a super V runs.

To stay in VARA E Production, you can run a stock rear spoiler and the 915 front air dam. The best aero gain is from removing the windshield and lowering the car. That also helps to get air to the engine bay.

For a good aero analysis, take a look at the chart at the bottom of this link:

http://www.cassidy-online.com/porsche914/aerodynamic_aids/

But VARA is VERY flexible. If you wanted to run a wing etc. they will just bump you up to a GT class.

Thanks for the valuable input. I agree that the stock motor is at a disadvantage. Stock cams are never a good idea since they are set to accommodate the lower rpms... I plan on taking things slow and see what I need to do as things develop. I want to develop the handling first. Willow Springs is a scary enough track to start out with a bunch of Hp....plus I don't expect Penske or others will come a knocking any time soon to give me a ride....(IMG:style_emoticons/default/smile.gif)