type 4 turbo guys-, what turbo did you pick and why- Options

[Jake Raby]

You should be able to login and to post with no hassles...There is no special procedure for either.

[Mueller]

QUOTE (nein14 @ Oct 31 2005, 07:30 PM)

Why doesn't anyone look at what EvilEd did 94mm Mahles 7.65 comp. Bosch CIS injection KKK26 with SSI heat exchangers etc. Trust me it works and is very very reliable, and goes like hell!! (IMG:http://www.914world.com/bbs2/html/emoticons/driving.gif)

Hi John,

have been able to or wanted to dyno that car yet?

[Brett W]

QUOTE

Why would a Honda driver even give a shit?

I still own a couple of 914s. Granted they'll never have an aircooled four in them.

At 10 psi I can get 250+hp and at 20psi I can get welll over 450. If you can't do that with a type four I wouldn't bother putting a turbo on it. Stick with a NA motor. For the kit prices you offer you can build a 180+hp big four for $5K.

The thing with a big six is re-sale. The prices of even a cheaply done six are much higher than a four. But that is another argument.


Now back to thread topic. For most people that like the torque of a T4 you should either go with an IHI from an older Suburu or a T25 from a @nd gen DSM. Both of these turbos max out at about 10-15psi, but they spool RIGHT NOW. You should be able to get max boost by 3500 rpm. If your turbo is too big your powerband ends up being 200rpm wide. For a semi built T4 you could run a TDOH14B from a first gen DSM or a small T3. .42 AR or if you could find one a .36 would also spool quick. You could also build hybrid T3. .42 turbine with a .63 compressor wheel. If you are really planning on going big I would look for a T3/T4 combo. But you better raise the redline from 5500 rpm because this turbo won't get started until 4000-4500.


You could build some sort of rear mount turbo system like the STS systems. I don't like the design but it sorta works. This setup would allow you to keep the heat exchangers.