Has anyone turbo charged a JT-code engine?

[JShadzi at aol.com]

Bill, absolutely, Michael Gough has done it, and I've done a few, what you propose below will work very well up to boost levels of around 10psi, where you will need to start getting into some supplementary fueling.  The CISE system is more than capable,a nd the JT bottom end shares many parts with the RS2 motor (more or less), it is fine for power levels past 300hp easily.  You'll need to adapt some coolant and oil provisions, but other that that it is very possible.  Run modest initial timing with premium fuel and you won't have an detonation problems either.  Let me know how I can help or if you have any questions.

Best,
Javad
80tq.com

In a message dated Tue, 16 Jul 2002 1:18:28 PM Eastern Standard Time, Bill Phelps <wphelps at rizzo.com> writes:

>I was toying with the idea, and was wondering if people had much success. I
>realize that the motor does not have knock sensor and that there are other
>differences (CR, oil squirters, etc..). However, I was thinking about
>topping off the JT code motor in my  87 4KQ with the head, intake, exhaust
>manifold, and turbo from a MC motor. (unfortunately the bottom end of the
>donor motor was junk) To handle boost/knock issues, a friend of mine has
>grafted the APC boost control system from a SAAB to his turbo'ed BMW 635
>with tremendous success. For those of you not familiar with the APC, it is a
>stand alone system that uses a knock sensor, pressure sensor, and solenoid
>to cut back boost when knock is detected. They are cheap and plentiful in
>any junk yard and easy to remove....
>
>I'm thinking of going with modest boost (5-8 psi). Any idea if the CIS-E
>system from the 4KQ can fuel that much boost or will I need to add a
>supplementary system...
>
>I know I should just do the full MC swap but don't have a complete motor and
>don't really want to spend the summer under the dash...
>
>Just wondering.
>
>Bill
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