Originally posted by scottd60:
I was very interested when the numbers were predicted to be 200+ CFM but at a maximum 193 CFM (13 CFM over stock DH SVT) does not sound like very much in the HP department.
How much HP can one expect from only a 7.2% increase in UIM flow on a typicaly modded 2000 SVT...1-2HP, 5-10HP ?


At only 13cfm increase (which I also agree is very low over a DH and backs my statement a DH in the GB likely gets nothing but port matching) it will show about the same gains as a DH over a SH. ~3FWHP & TQ on a moderately modified SVT.
The less modifications and other SVT parts the less the gains. (Just like any other modification!)

Of course any 3L will show "roughly" twice the gains because of the nice increase in port volume to accompany the small overall port increase (7% is under 1mm increase in port size though )

Any FI car will show good gains too since a less restrictive UIM will allow more cfm flow at the same boost. (i.e. more efficient and less heat)


If you already have a DH UIM you "probably" do not want in on this group buy. (though honestly ~3/3 at the wheels is not a bad gain at all for the price & the folks that do want in already know it themselves)
Talk to EH directly and see what they can/will do for you. Yes the price will be higher but if they agree to help you the results will be much better. 7% beyond a DH is a long way from the limits of the UIM.

For the other folks getting an UIM 7% better then a DH for this low of a price is unheard of.


Also folks that have little or no mods. DO NOT get pissed when you get in on the GB and you don't "feel" your numbers skyrocket. It takes more then just a good UIM to make power gains. It is all based on your engine's efficiency and current state of modifications.
(Disclaimer after hearing countless folks whine about "feeling" little or no gains from adding just a DH UIM on a mild non-SVT - What a shock! )


For instance the first thing everyone in this GB should do is get an RLIM if the don't have one already. It's a waste if you don't!!!
Then 60mm TB for 2.5L and 65mm for 3L.
Then a great exhaust. (really should have this already)
Then... Everyone gets the point I hope...

2000 SVT #674 13.47 @ 102 - All Motor! It was not broke; Yet I fixed it anyway.