After some nudging from Green Dragon and 60’sRacer I decided it would be nice to have all the information on my project on one “Thread” so I am creating this one.
I would first like to thank JohnM., Conedriver, Little Italian, 60’sRacer, Genericwood, for all their help, a Big thanks to SteveSchwitter’s (Rockford IL.) who built and designed the engine and everything around it and Bob Payton at Speedlab (SpringGrove IL) who provided and tuned the Autronic's SM2 programmable ecu to perfection.
In this project I kept all the luxuries of the S-4 Spider like the power windows, A/C, power steering and brake’s so from the outside she will look stock for the street use.
This is what I did in the project:
1. A big valve fully prep race engine (CR of 10.4)
2. Twin Individual Throttle Body's and carbon fiber airbox
3. Aluminum flywheel
4. 7.25 in dia Tilton using a Clutch-Net sprung hub clutch disc
5. Installed an Autronic SM2 programmable ECU.
6. Modified the intake VVT and added a modified exhaust VVT
7. Autronic 500R Direct Fire Ignition
8. Modified the cooling system
9. Modified the cold air intake
10. Rebuilt the TX with lighten gears
11. Gated the oil sump
12. Switched out the 4.10 axle to a 4.58 that is shimmed to 50%
13. Installed Outlaw calipers and Tar-Ox rotors all the way around
14. Switch out the 26 mm front sway bar to a 29 mm
15. Switch out the Koni’s Red’s for Yellows
16. Custom bolt in Roll Bar with a removable Petty Bar
17. Custom seat frames for the Sparco race seats
18. New seat covers and bases
19. Custom 2.5" Burns Stainless exhaust system.
I will briefly go over each of these modifications and have plenty of picture’s. It will take some time so be patient.
Murray
To start off here is the before and after Engine bay.
The next big stage was to modifiy the intake manifold for the TWN throttle bodies to bolt too. The intake tubes from the manifold had to be cut off level and a custom flange weilded on. Later after we installed the engine we found that we needed to put an 8 degree tilt up on the intake manifold tubes for the airbox to fit in the engine compartment.:mad
But it sure looks mean with those air horns pointing up at you with the box off.
I had the seat's recovered including new seat bases during this time too. I got these from "Alfaholic's they turned out great but with the new bases it caused me to set up higher. This is what started me looking for a pair of race seats for the track. There was no way I could stay under the the roll bar and have the top work with the new seats.
I went to an aluminum flywheel and a race grade clutch. The pressure plate will be a 7.25 in dia Tilton using a Clutch-Net sprung hub clutch disc. This disc gives some protection to the drivetrain by absorbing the power pulses of the souped up motor. The whole package is very light and is used by the best Alfa racers.
With this extra HP I thought better brakes might be in order? The two times that I was on the track I had a brake fluid boiling problems and I had fresh brake fluid both times and Ferondo HP brake pads? So I bought some Outlaw Calipers and Tar-Ox Rotors from “Performatek” to help solve the problem.
Here are some Pic's of the parts and the before and after shots.
Originally in the design of the induction system we were thinking of doing long radius tubes that would wrap over the top of the engine and connect to the stock airfilter box location. We were doing this to take advantage of the existing CA inlet and because of the mass of stuff on the right side.
We later decided to do away with that plan, clean up the right side and drill a 3” hole in the right fender wall. We put the airfilter just behind the right front bumper. There is a nice space in front of the wheel well liner and the front head light for the ducting to the cone filter. The wheel well liner is now fasten on with screws for easier access to service the filter. This gives the engine bay a vintage look IMHO.
I also had to pull the air bag senser on this side for it to work. I actually pulled both by cutting the bracket that supported them. I also took out the orange control box. Thus I don't have a A/B system anymore.
The CAD drawings on the original design are at the bottom of the page.
Awesome! More pictures of the intake and FI would be appreciated.Duke
Here are some.
They are 45 mm individual throttle bodies from TWM with a fuel rail and injectors. The injectors are sized for 32 liters/hr. This will be good up to 205 hp!
The throttle bodies will have a throttle position sensor that the ECU will connect to. This will tell the computer when you've punched it or backed off. This is in addition to the MAP sensing that is the main control for the fuel delivery. MAP is short for manifold absolute pressure which is a very precise way for determining the amount of fuel that the engine needs under the various operating conditions.
This picture is before we had to put a 8 degree slope up on the throttle bodies to get the airbox to fit the engine compartment.
Wow! and, just............WOW! What a totally sanitary, first-class job job, bro'. With all the care and time you are spending, not to mention the $$$, one can easily see it is a labor of love. Keep up the good work!
Quote:
Linear Mode
