This is what I did for some of the reasons discussed above, but there is a PREPONDERNACE of data out there suggesting more than simple conversion (i.e. just add 100 deg C or around 200 deg F to get 'actual' EGT from post-turbo EGT) to be necessary for a truly accurate data collection. At lowere loads and slower gas velocities, the heatsink effect of the turbos is much greater, while getting to be much smaller at higher speeds (and not linearly so). Yes, adiabatic expansion (immediate expansion post-turbo) accounts for about 100 degC of cooling, but what about the heatsink effect and the distance from the exhaust port.... Tough to estimate...

Gurgen

 

lest you forget, my PE relationship is "interesting"..... apparently being their prototype ***** doesnt mean squat when it comes down to getting replacement parts-- Technosquare helps me with PE japan... (thanks Yoko)

i might try to see how bad my SS manifolds are and selling them off to counter my cost..

i thought cast pieces are cheap i mean, its all foundry/pouring, no hard manual labor like welded pipes are--

any benefits for porting cast manifolds to make them smoother?

 

Yup, the actual unit cost of a cast manifold made in China/Indonesia is less than $50, when you order 100-200 of them. But the mold and initial investment are very high. Also keep in mind, that after casting the manifold, there is signficant machining labor involved, to finish the manifold, machining the reliefs from fasteners, milling, etc. But I agree $1600/set is rediculous, and I imagine they are trying to disuade people from buying manifolds, and then building their own turbo kits.

In terms of porting, many head/manifold gurus will tell you that the ports should not be mirror smooth, as a rougher surface actually increase air velocity and flow. Either way, the benifits are probably minimal, with an unequal length cast manifold, and probabliy wont justify the cost of doing it. I think a basic port matching would suffice.

 

Hope all goes well. Let me know when I can test drive???

Take care .

M

 

Sharif, I hear you on all you say. But PE's total lack of customer support, follow through, and insane pricing have doomed them in the US market. They talk a good game but fail to follow up in the US. If someone already owns a PE TT kit, then the price should be suited to recoup costs plus profit, not these crazy prices. They can't sell many kits here anyway due to the pricing and lack of real support.

 

BTW, here is an exact quote from Autometer's installation instructions for EGT:

For turbo engines, install the probe 1-2 inches from the turbo exhaust outlet. For non-turbo engines, install the probe 1-2 inches from the cylinder head.

Why it is not the same, I do not know.