JT to Turbo Question

[JShadzi at aol.com]

Nate, considering that the JT has 8.5:1 compression, it is not really that high...I had no trouble running close to 20 psi in my 8.2:1 MC2, honestly I think the JT would be a great combo with lower boost and decently high CR.  I have been contacted by others who have done the same in the JT'ed 4kq, and don't forget Callaway offered a kit with close to 10psi using the JT bottom end.
Javad

In a message dated Thu, 19 Apr 2001 12:26:59 PM Eastern Daylight Time, Nate Stuart <nathan.stuart at maine.edu> writes:

<< No way, no how. The JT engine has too high a compression ratio to run much of 
any boost (especially w/o knock sensing). Albeit the JT isn't _that_ high of a 
CR engine, but no way would I ever run a turbo on it at all with no knock 
sensing. Not to mention the wussy cam, and lack of sodium filled exhaust valves 
as well... Whether the CIS system will handle it or not is the least of your 
worries. You'll still have to find a place for the intercooler, intake/exhaust 
plumbing(the 5kt IM is bass ackwards compared to the JT's) as well.

Take care,
-Nate

> All,
> 
> This may sound like a silly question but I have to ask. If I just bolted
> on 
> the early 5k turbo parts to a 4kJT, without changing the ecu...and just
> run 
> it at 6lbs of boost...would the CIS metering work properly?
> 
> I was wondering why under low boost that the metering plate would not
> just 
> be sucked open proportionally (and thus with the right A/F ratio) by the
> 
> turbo?
> 
> Thanks,
> 
> Erik
 >>