Re: Turbo Questions for those with Knowledge....

["Jonas Karlsson" <jonas85k@hotmail.com>]

>From: "Langford, Cory" <Cory.Langford@icbc.com>

>What about the old plain Turbo Diesel?

if it fits, go for it.

>I figure I can scavenge a turbo diesel oil pan (need the drain return >for 
>oil), the oil filter attachment (for the turbo oil intake line), the 
>manifold, the turbo for under $300.

Junkyard prices should be lower than that. My PNP charges $20 for exhaust 
manifold, $35 for turbo, and the other pieces should be somewhere 
reasonable. The trick is finding a turbo diesel.

>I know you can't have high compression with turbos (so the web seems say) 
>so how about the 8.5:1 JH engine?

I'd say 8.5:1 is perfect for you. Some modern cars (Saab, etc) actually run 
fairly high compression with their turbo's. They run low boost too, but the 
combo makes it pull hard at lower RPM.

>I figure this is a good engine to play with
>(especially since mine is on it's way out anyways).

Sure, your perogative. If you want it to last, make sure the engine you 
start with is in good shape.

>The old T.D. were mechanically controlled boost (all build into the turbo) 
>from what I understand, so there is nothing to worry about except getting 
>it all connected.  Right?
>

Basically, that's right. Check 8vturbo.com to see their installs. One thing 
I'd do for sure is install a load sensing CPR from an audi 5000turbo. This 
will add a bit of fuel under boost. Wastegate/bypass valves should also be 
used to make it last long. I dunno if the TD's had wastegates, probably not, 
in which case its $$$ to fit it. A bypass valve is easy to install. Bypass 
valves help keep the turbo spinning between shifts, etc.

Also if you're at less than 6psi, then you don't need an intercooler.

FYI, later Saab 9000 (post 87 I think) had a neato knock sensing system that 
adjusted boost to keep it near knock. Stand alone system too. Kinda like the 
KS in VW's, but let off on boost until knock was not detected.

Search the web for Saab tuners/fans. The system is called APC system.

HTH,
Jonas




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