Are there any reviews of the Tall Boy plenum on G's? I looked on their website but they don't show much. I remember reading someone with a 350z with FI saying that it provided 40rwhp on their dyno's.

Anyone else have any data to show how it compares to the Md spacer and MREV?

I have an 03 sedan.

 

I have an APS Tall Boy Plenum and I'm very pleased with it. I have not yet had a chance to dyno my G with it, but I think a claim of 40 rwhp is exaggerated (although I wish it were true).

Based on the specs and what I have read, the gains from the APS plenum are going to be very similar to those from the Crawford plenum. Crawford claims an increase of 9 hp at the original peak, and a solid 17-20 hp at redline.

For some independent dyno test charts see (“Plenum C” is the Crawford):

http://www.motordyneengineering.com/...tAnalysis1.gif
http://www.motordyneengineering.com/...tAnalysis2.gif
http://www.motordyneengineering.com/...tAnalysis3.gif
http://www.motordyneengineering.com/...tAnalysis4.gif

I went with the APS over the Crawford because I have seen both and IMO the APS is cleaner and appears to have better machining.

 

Well the person said that the 40rwhp only came with the FI and not on NA. He supposedly dyno'd before and after the Tall Boy with their FI installed.

 

hmmm^^

 

Well if he is running the APS plenum with FI then a 40 rwhp gain is maybe a bit more believable.

Interestingly, I have read that many G owners with FI keep the stock plenum. They say the shorter stock plenum actually gives better gains than a larger plenum when you are running FI.

Are you wanting the APS plenum for NA or FI?

 

NA. No plans on going FI.