Re: [DML] EFI Custom Intake Winter Project

[jwit6@xxxx]

Had the car out for an extended ride today and got the fuel mixture values a 
lot closer to what they're going to need to be . Up 25% from where they were 
with the stock intake and muffler. I considered removing the cat, and know 
the benefits would be real, but I wanted to get it on the road ;-). It went 
to 85% today here around Cleveland. Guess spring is over.

Does anyone know of a ready made cat test pipe that will fit the crossover 
pipes square catalytic converter mount flange? It would save me from having 
to fabricating one.

Jim VIN 6147

<< Sounds like great work Jim. Later 2.8s went with a big intake manifold. 
eg. Puegot 504e. It made 185 HP. Should be interesting to see what you 
get.

You should install one of those catalytic converter test pipes. Its 
worth about 5-10 HP based upon the ratings of the euro version.

BOB

jwit6dmc12 wrote:

>Hello all,
>I wanted to share with you what I've managed to accomplish over the 
>winter. When my clutch slave cylinder failed I removed the intake 
>manifold to replace it, and before I knew it I decided to fabricate a 
>new intake for use with my EFI setup. I also replaced the alternator, 
>rewired the engine compartment and replaced the exhaust system with a 
>polished stainless steel Supertrap.
>
>There's a picture on the second page of the photos section called EFI 
>Intake. 
>
>After I had the original intake off I realized that with a 90 degree 
>v 6, everything is perfectly square. No fancy angles. And with the o-
>ring seals on the heads it seemed like a reasonable project to 
>undertake. Anyway if it failed I could just go back to the stock 
>intake. But it's such an ugly thing that I really didn't want to give 
>up. 
>
>Anyway, the intake is all aluminum, mostly flat 1/4 inch shaped in a 
>90 degree V with 6 independent aluminum intake runners whose inside 
>diameters match the intake ports. 
>
>All the CIS wiring, sensors and switches are gone, and it really 
>cleaned up the engine compartment. While I was at it I also moved my 
>previously installed EFI ECU trigger from the coil to a Hall effect 
>sensor on the crank pully. Also installed a new Accell Super Stock 
>ignition coil.
>
>The intake uses twin throttle bodies from 1990 Ford Tempos. Both 
>courtesy of the bone yard. Very economical. Idle air valve is 
>courtesy of a Porsche 914. Injectors are Accell 24 lb high impedence. 
>Fuel rails are extruded aluminum. All custom. This would not be 
>possible if I didn't have my own metal working lathe. Although 
>extruded rails are available from Accell and all you have to do is 
>have you local machine shop machine the injector seats for you (4 1/4 
>inch centers....)
>
>Air filter assy is a K&N in an Edlebrock dual quad oval with custom 
>machined fillers to fit the smaller Ford throttle bodies. TPS is a 3 
>wire Ford and is a direct bolt on. Engine temp and air temp are from 
>Simple Digital Systems (along with the ECU) and the MAP sensor is 
>standard GM 1 bar. (Although you could use the stock Bosch water temp 
>if you wanted)
>
>With the new intake and the Supertrap I had to bump up the mixture 
>values from what I used with the stock intake and exhaust about 10%, 
>so I suspect the engine is breathing a little better. It sounds quite 
>a bit different. Noticable intake roar under full throttle 
>acceleration. Still using the stock cat. 
>
>Fuel delivery to the filter and then to the fuel rails is all stock 
>except that I removed the fuel accumulator since it was dirty anyway. 
>Fuel pressure regulator is a stock Nissan 240 ZX and runs at 43 
>pounds.
>
>Hope to have it on a Dyno soon to finalize the mixtures and see what 
>kind of power it makes. 
>
>Hope you enjoy the info....
>
>Jim 
>Vin 6147 >>