I absolutely love the spacer in terms of the power increase! I didn't think it would be noticeable but above 3K RPM's it really is like night and day. The sound difference is slight, nothing too noticeable there. But the power difference is substantial! Now remember I'm talking for the type of mod that is it. I can't wait to feel it in combination with the MREV2 manifold I believe it's called next.

I feel like the REV-UP motor can really respond to bolt-ons, or maybe it's just this mod that was a nice increase. I feel more from this spacer than I did from a CAI in my 3.2CL 6MT, lol.

Anyway I was planning on doing one of the bolt-on S/C kits but can is it possible to put the '05-'06 G35 coupe 6MT into the low 13's with bolt-ons? Or is FI necessary to accomplish that because the car is so damn heavy, lol.

Thanks for reading!

By the way... my buddy that works at Acura said something about the anti-freeze switch thing when the temperature is under 55 degrees? What's this all about? He said he's not sure if I can just not worry about it or not. Is this something that has to be changed when the temperature raises and drops? If so that's really annoying!

 

thats interesting, tony didn't see much gains with just a spacer on a revup engine

 

Wow that's surprising! Because even 2 of my friends that I took in the car before and after said that it was definitely more of a pull after the spacer went in above 3K RPM's. I understand that before 3K RPM's not much is noticed, but from 3-7K RPM's I feel like it's substantial. Hopefully the MREV2 manifold will also help.

 

on the revup, you're going to get significant gains on the MREV2 which would have been a better first buy. The spacer will be a nice compliment to the MREV2 which I suggest is your next mod.

 

I think your friend is talking about the throttle body coolant bypass valve... its really nothing special.. don't worry about it.

 

yeah i also think that is what your friend is talkin about.
You just need a $5 metal tube for the coolant to bypass the throttle body

 

MJH,

Wait untill you install the MREV2 with the spacer. That's when the power really kicks in.

As for the CCV, yes, it is optional. But don't use a simple bypass if you ever drive in cold weather.

The CCV does the same thing as a simple bypass but it still allows you to heat the plenum when needed. If you happen to be driving around on a really cold day, for safety reasons, the throttle body must be heated to prevent ice formation on the butterfly valve.

All the MD spacer kits are specifically designed to avoid throttle body freezing.

1) The basic spacer keeps the whole plenum and throttle body heated all the time (like stock).
2) The regular Iso Thermal allows you the option to heat the whole plenum and throttle body on cold days and keeps it cool on hot days.
3) The Copper Iso Thermal specifically heats only the throttle body while allowing the rest of your plenum to stay cool all the time. No matter how cold it gets outside.

The engineering approach is to make sure the throttle body never freezes up. So none of the Motordyne kits will leave you stranded on the side of the road on a freezing cold day.

Using a simple bypass can save a few dollars but it is not recommended if you live in an area where it gets really cold. Its not worth the risk.

 

Okay that sounds good thanks for the clarification the isothermal spacer is the one that I bought. And I live in Delaware so it does defintiely get cold in the winter, lol. But I'm glad to know I don't have to adjust anything every couple of months. And I am absolutely doing the MREV2 manifold next.

 

If you use a coolant bypass you need to make sure and remove it when winter hits.

 

^^^ sounds like he's using the copper IsoTermal... so he should be good to go

 

I'm running Tony's 5/16 spacer and Mrev-2 lower manafold on my 06 coupe 6mt, and by far is the best bang for buck of all my mods. And yes I use the supplied coolent by-pass switch even tho I've never turned the coolent back on- I live in san diego- but nice to know it's there if ever needed. Other mods i have that seem to compliment Tony's stuff: Pop,Z,Stillen duel,elec. grounding kit and a fat right foot.

 

Tony, any confirmation on my statement above? Any use in a spacer on a revup without the mrev2?

 

Yes, that is correct.

A spacer by itself doesn't make gains on the REVUP lower plenum. It must be used with a MREV2 to make gains.

 

I'm confused because I have the isothermal 5/16" spacer and I noticed substantial gains from 3-7K RPM's?

And what's the final verdict on the bypass switch? Do I need to adjust my settings when it's cold vs. when it's warm? Because I really don't want to have to worry about doing that. Thanks!

 

Yes, it is true. I did very careful testing on the REVUP engine when it came out and found the spacer (by itself) didn't make a gain on the dyno. This is because the REVUP stock lower plenum is completely different from the prior generation.

I actually did the first test at a So. Cal. dyno day with a lot of people present and it was a big disappointment to see the lack of results.

It was this disappointment that motivated the need for a plenum mod that would actually work for the REVUP engine. The "need" is what drove the invention of the first generation MREV.

And it turned out that the MREV was a much better performer than the spacer ever did on any engine. So in the end, it all turned out for the better.

Tony