930 Porsche short 4-speed transmission question, What about putting a turbo charger on it? Options

[burton73]

930 Porsche short 4-speed transmission question

Cable shifting.


I have been working on my V8 conversation for 8 years. I have done just a little a bit of work on the body of my car but now I am at the point where I am thinking about the shifter for the trans. The idea was to use a Cable Shift unit from the web for 930. My Transmission is inverted with AN fitting for oil cooling and has the big buck rebuilt done 10 years ago from G- Box. It is just the way it was when I bought ArmyDudes car with it mounted in but never was run. I called G-Box and they say it is good for more that 650HP. I have 930 CVs and 930 Stub axles. I will need axels. PMB did the conversion to the 5 lug and put the rear 911 E brake in. Brakes are from a Boxster rebuilt by rich Johnston. Front suspension is rebuilt from a Carrera. Hydraulic master for Clutch and duel brake masters. I have to install all of this stuff.

So I find my self looking at a number of our member’s cars and seeing what they did with their Transmissions. The Subaru Transmission look easy enough as far as the linkage with a MR2 box. What ideas do our experienced members have on my car and what can they tell me to help guide me in this long project. I would rather buy the linkage than build it but I could build it.

I called Renegade and the owner said I should change to a Boxster box, as it is cheep and would work with a boxster shifter and they have the parts to sell me. He said that the Synchros would go out if the shifter was not set up right. So one may question changing to a different Transmission. I know that 930 boxes are notchey as far as the shifting but I am not racing, not that I would not want to burn rubber. I did have my CV pop on my 1st. 914- Chevy in 79 and I only had 200HP in a 283SBC with stock 5speed.

My Engen is going to put out over 400FPT. I question if I want more power just because I can have it. I sold my 2015 Corvette Z-51 this year and I like the feel of torque when I punch it. I have lived my life, as a guy cannot have enough power in a striate line.

Bob B

Last picture is showing the set up when I got ArmyDudes car. The primer picture car is a different super clean 74 that I got from Craig at the Camp 8 years ago



What about putting a turbo charger on it?


I am thinking that as my 930 transmission can handle 650 HP or more, is there a simple turbo system that can be bolted up to my engine and not need an inner cooler and run through engines originally equipped with a carburetor like Edelbrock’s complete line of EFI systems. Just an idea at this point.

What do you know?

Bob B

[burton73]

My 1986 Corvette engine is a stock piston at 9.5 to 1. I have a GM brand hot cam kit that is roller camshaft and all the valve train stuff, hotter cam, rockers, springs on and on. Stock D port aluminum heads. I am putting on one of the new Fuel injection systems that are now at a reasonable price. I will have a machine shop with a dyno CK and set up my engine that is a crate engine that I bought several years ago but never ran. I need to have the heads push rod holes elongated to work with the new cam geometry so they do not hit. I was thinking of a simple low boost bolt on without intercooler. The new FI systems that look like carburetors say they will enrich up to 2.5 bars. I was thinking of just .5 bars or so. Looking to bump up to 600HP from 400 HP or so. They say they will also have management of the spark as well.
I am far from an expert and know enough to get myself in trouble with this.

I built a turbo setup for a 1974 2.0 914 back in the early 80s and it had no intercooler. Worked but had a problem with the enrichment under boost and some other problems. It was set up at 7lbs boost. Really could go fast uphill on the freeway.

Bob B