Hey Guys,

Here is some interesting old data I thought I would share since it wasn't previously posted with the dyno plots.

I just recently picked up a Dynapack 4000 dyno machine for accelerated research and development. Now that I have the dynapack software viewer available I plugged in some old data I collected from prior testing performed at Curch Automotive in Wilmington California.

Below is plot of the 1/2" spacer on a "REVUP" engine. It was a little over a year ago, but the results are fully valid. It was performed at one of the Church Automotive dyno days. All pertinent variables were monitored and strictly controled.
Same gas, same day, same dyno, same number of engine miles, same ECU resets, same coolant temperatures, car wasn't removed from the dyno and all that stuff...

The results were both good and bad news.

1) Bad new - Spacer had no effect (or was within the margin of error) on the "REVUP" engine...

2) Good news - Failure forced thinking out of the box. This led to the first generation MREV, which, ironicly, turned out to be vastly better than any spacer gains on any VQ engine.
...Its even better than any other single NA bolt on!

So the non existant gains shown in the pre/post plots below actually ended up being a good thing.


PS - The spacers work great on the "NON REVUP" engines.

 

hmm, pretty interesting. Guess that proves there was a problem, and Infiniti addressed it

 

hmm, so did i make the right choice? i have a 05 AT (non-revup) and the 1/2". or would the 5/16" have been better?

 

i wanted to ask that same question.

anyone know???

 

i know this might be a stupid question, but if the 1/2 spacer didn't have any gains or very little.. what about the 5/16 spacer on the 06 revup?

 

The spacers work well on any AT G35 because they all have nonREVUP engines. The 1/2" and 5/16" each have their nich. Get the 5/16" spacer for street driving.

And get the 1/2" spacer for racing or for the added deep sound it will make.

And I don't think 5/16" would have worked any more or less on a REVUP.

 

hi hydrazine,

i'm planning on getting the mrev2 + 5/16 spacer on my 06 revup, would there still be sufficent gains compared to previous years of the coupes?

 

You have a REVUP engine so you will get really good gains with that setup.
Peak power won't change all that much but gains in the upper midrange will go up at least 15HP and 18TQ with a significant increase in overall area under the curve.

Its the single most effective NA bolt on available to the REVUP VQ engine.

 

This is quality information.......copy these pages!
(I have the Sport Z issue)

 

So whats the best Motordyne mod for a non-Revup? The 5/16th spacer or Mrev2?

 

mrev2 makes more average.
spacer makes more peak.
But the difference is subtle.

 

^ is that true for the NON REVUP? the mrev2 being more power across the powerband? what kind of gains?

 

Yes on all counts.

Dyno plots are posted on another thread I started a little while ago.

 

Tony, any data for a non-revup w/ spacer + MREV2 with tuning available to richen up the mixture?

 

Almost, but not quite.

Remember the first post where I discused testing of the mrev++ (now known as the mrev2) on a nonrevup engine? I didn't tune after installation, but I did tune before installation. That's not quite the same, but the engine was running healthy before the installation.

It did quite well.