10V T pics

[JShadzi at aol.com]

<< Does anyone know at what point the exhaust manifold
 becomes overly restrictive?>>

On the 10v, it is commonly accepted that 275-300hp is the max. realistic flow 
through the stock MC exh. manifold, frankly, I can't imagine the two-piece is 
any better, marginal at best.  Also, the k26 is questionable for 300hp too, 
more like 250 efficiently.  They are still both poor examples of a cast, 
restrictive, unequal length manifolds.  Granted, for the stock hp levels, it 
is more than good enough.  I am currently working on a five into one tube 
header for 80tq.
 
 <<For under $1k, I would look at the manifold first,
 as I will whenever I can afford to take my car over
 the 300hp mark (I'm shooting for 350-375 as a goal).
 Of course, my car is a 3B, so that's not relevant to
 the discussion other than raising the point about the
 exhaust manifold and it being possibly overly restrictive.>>

Sure, I think it is also commonly accepted that the 3B manifold is also good 
to 300hp, the RS2 to about 400hp.
 
 <<How much flow improvement comes from the '91 200t 2-piece
 manifold, if any?>>

Right, like I said, marginal at best.  I think Jeff Goggin's make shift flow 
bench showed about 5-10%, but functionally, the manifold is not much 
different, it just the ONLY option from the factory..
 
 <<Did you look into MB 6.9 CIS injectors and metering head?>>

No comment  =)
 
 <<How about using a hybrid turbo of some sort to flow more
 air while trying not to have eons of turbo lag? IMHO, the
 K26 boost threshold is unacceptable.>>

I agree, the K26 is bad, but I feel it is an efficiency issue foremost.  
Problem is, trying the mix and match old, in-efficent turbos does not seem 
that productive to me.  I will be using a Garrett T3/T04E, which is also 
available with the K26 hot side housing for under $800, and only needs some 
adapting of oil and water lines.
 
 <<Have you already installed a higher-flow downpipe? Exhaust?>>

I will be fabricating a 3" downpipe and already have a 3" exh., amazing 
upgrades for the turbo cars (esp. the exh)
 
Javad
80tq.com