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Re: TPIS Miniram

Subject: Re: TPIS Miniram
by Danspeed1 on 2014/1/15 1:11:42

Quote:

rklessdriver wrote:
If TPIS won't swap it out for the smaller port one, then you can either try and sell it or just install it as is (provided there are no other fittament problems).

The port mismatch with the cyl head being smaller won't really hurt anything. Not at the kind of power you can make with 113 heads anyway.

Any idea what gasket your 113's are port matched to? It may not be as bad as you think.

Just FYI - Back in the day people ran Rectangular Port Intake manifolds on Oval Port cyl head BBC's all the time and thats a HUGE mis-match. It is well known that they run better than the oval port intakes on oval port heads.... mainly because the rectangluar Port intake itself is a better design (much like Mini Ram v/s TPI).

Yes it would be better if the ports lined up but in the real world it's really not as big of a deal as some make out.
Will

Unfortunately, it's my understanding that when you put a the wrong TPIS unit on the wrong heads you can actually crack the manifold when you tighten it down. In fact this manifold has already been repaired once due to being put on the wrong engine. As far as flow is concerned I too wonder exactly how much the flow is impacted as a result of the ports not exactly matching. If you look at it, it appears as though it's just such a minute difference. I've never actually seen any evidence proving port matching makes a difference and I am honestly wonder if anyone has specifically ever done any tests for this; Before and after Dyno testing.

Z25