durability of JH block internals and going turbo

[txrocco@sbcglobal.net (ATS - Patrick Bureau)]

The JH 1.8 makes 90HP,a JH/3A (PP Head w valve Job)w/G grin Cam, Header is
expected to pull out 130-150HP, perhaps not 200HP but for air aspired that
is pretty damn good for an 8v, considering a 16v give out 129HP. would you
not count that as huge difference in power?

Yes the 10.1 compression issue is one that I am trying to figure out as
well. the only thing I can think of is getting Forged pistons and get the
ones that would drop the pressure to a reasonable 9/9.2:1, though I think
this would make the turbo setup restricted in how much boost can pass
through it before blowing something.

3a block Etka Audi model 90 car year 1992-1987

ATS - Patrick Bureau - txrocco@sbcglobal.net


=>-----Original Message-----
=>From: scirocco-l-admin@scirocco.org
=>[mailto:scirocco-l-admin@scirocco.org]On Behalf Of Dan Bubb
=>Sent: Tuesday, October 29, 2002 7:01 AM
=>To: Jeff Toomasson
=>Cc: scirocco-l@scirocco.org
=>Subject: Re: durability of JH block internals and going turbo
=>
=>
=>As far as I know the JH and 3A rods are the same length at 144mm center
=>to center. The extra stroke is accomodated by moving the piston pin a
=>little higher in the piston.
=>The JH really is a good starting point cause it's rugged and it has a
=>low compression ratio. The 3A is good because of the greater
=>displacement (which probably won't make a huge difference in ulitmate
=>power, but will be alot more driveable off boost), I think it has piston
=>oil squirters (although I can't find the 3A in ETKA to save my ass) but
=>it's really big drawback for a turbo application is the 10:1 CR. So,

<trimmed a little.. was getting long>