plenum spacers help people????

Post by **silverbullit05** » Wed Mar 19, 2008 11:23 am

hello im looking into plenum spacers and im having a hard time chosing 1 there is like 4 different brands and like 4 different sizes from1/4in to 3/4 what 1 should i get im look for good torque gain and decent top end power gain. what are your thoughts?

Post by **RED_DET** » Wed Mar 19, 2008 11:45 am

5/16 gives more gains over a broader rpm range.

Post by **Sentientbydesign** » Wed Mar 19, 2008 12:09 pm

Go with the 5/16s like RED said for broad engine power, go with the 5/8 from blox if you don't want to pay too much hehehehe

Post by **silverbullit05** » Fri Mar 21, 2008 2:57 am

well ive went with the blox 5/8in spacer. my first opion of this spacer is its very large and i think they could have down sized it to 1/2in. oh and if you want to use the engine cover forget it you have to destroy the cover im leaving mine off. now for the nitty gritty driving it. i can tell you this i noticed a good torque gain from around 3500 to 6000. i do think there is much of a hp gain though. i tested the spacer by resetting the computer without the spacer and hammered on it with vdc off. going from 1st to second tires only chirped or spun for a second. i reset the computer again and this time with the spacer in went to the same spot and hammered on it again this time ive noticed that in first around 4500rpms in first tires seemed like the were slipping slightly then as i hit second the car spun the tires for approx 10 ft or so kicking the car sidways. im going to have it dynoed with just this mod to see what my gains were. seeing that my baseline was 248.9 whp and torque 228ft. ill update once i get it dynoed agian

Post by **joe603** » Fri Mar 21, 2008 3:17 am

Since you have an 05, you have the REVUP engine. A plenum spacer will not give you much gain without the MREV2 lower plenum. I'd get both....Very good gains for simple, bolt-on parts!

I also agree with the guys in your spacer size should be 5/16, unless you plan on adding FI. If thats the case, go larger or get a full aftermarket cover like the Kenetix one.

Post by **tollboothwilley** » Fri Mar 21, 2008 12:44 pm

I went wit the BLOX 5/8" and have been happy with it.

Cheaper and I was able to modify my engine cover to fit on with very little effort.

Post by **Beancooker** » Fri Mar 21, 2008 12:49 pm

I went with a 5/8" Skunk2.

silverbullit05 wrote:oh and if you want to use the engine cover forget it you have to destroy the cover im leaving mine off.

You can use the engine cover without destroying it. You just have to remove a few washers, and make a few of your own.

Post by **CYO44Baseball32** » Fri Mar 21, 2008 5:56 pm

I am also curious about these spacers. I don't know much about them ( I came from a WRX) was wondering if they will fit on a G37 and also for some general information about them.

Joe you said "A plenum spacer will not give you much gain without the MREV2 lower plenum" What are these two spacers and whats the difference?

Post by **tollboothwilley** » Fri Mar 21, 2008 6:42 pm

the MREV2 is the lower plenum design from the 03-04. It actually was a better design, so by replacing this (for the 05-06 models) it allows for more air to enter the lower plenum.

The plenum spacer opens up the airway for the upper plenum storage so that the engine can breathe better.

It appears that on the G37 they have corrected the plenum space a little better because I haven't seen anything available for the G37 yet.

Post by **Andy_V35Sky_350GT** » Fri Mar 21, 2008 9:52 pm

I've read on a few 350Z forums that the 1/2 spacer seems to be the one everyone recommends. Wouldnt this ring true for the G as well?

I was considering getting the 1/2 or angled (I'm assuming the angled would do the best job in correcting the airflow problem to all cylinders).

Post by **tollboothwilley** » Sat Mar 22, 2008 5:07 am

supposedly the angle ones help a lot because the front cylinders get less air based off the plenum design. The problem is, unless you buy one of each you won't know what the real difference is.

Post by **joe603** » Sat Mar 22, 2008 11:45 am

tollboothwilley wrote:the MREV2 is the lower plenum design from the 03-04. It actually was a better design, so by replacing this (for the 05-06 models) it allows for more air to enter the lower plenum.

The plenum spacer opens up the airway for the upper plenum storage so that the engine can breathe better.

Exactly. Also, the MREV2 is modified (ported/polished) to increase flow.

Post by **Sentientbydesign** » Mon Mar 24, 2008 4:11 am

joe603 wrote:
Exactly. Also, the MREV2 is modified (ported/polished) to increase flow.

Would it be cheaper to find a 1st gen and port and polish it myself?

Post by **joe603** » Mon Mar 24, 2008 5:37 am

Sentientbydesign wrote:
Would it be cheaper to find a 1st gen and port and polish it myself?

Possibly...you'd have to find one though. There is a section that is ground down to allow better airflow to the front cylinders.

Here is the intake on 05+ REVUP:

Here is the Motordyne MREV2 design:

Post by **Sentientbydesign** » Tue Mar 25, 2008 5:33 am

Is the ground down area where it's lighter gray? Or is it the groove on the front cylinder?

FYI, this is more out of curiousity than me actually going and doing it.

Post by **silverbullit05** » Tue Mar 25, 2008 9:15 am

ok well i have purchased the blox 5/8 spacer and it is installed ive noticed that i have gained power but ive notice that in 5th and 6th gear around 5200 to 6300rpm that it seemed to take forever to rev up the car used to pull faster before the spacer at those rpms anyone have any advice. mind you this is the only mod made to the car right now. oh also comptuer reset and drove it like i stoll it!!

Post by **G_whizz** » Tue Mar 25, 2008 9:36 am

Ok... you need intake/Ztube (should have been first btw) and the MREV2 to help with the spacer gains. Then look at an exhaust.

Post by **Sentientbydesign** » Tue Mar 25, 2008 9:45 am

Great! I thought zozo had dibs on spending other people's money. Now Sean is too!

Post by **TISon28s** » Wed Mar 26, 2008 5:58 am

Get 3/4 in. And then get a bigger throttle body. Andysautosport has good prices on them.

Post by **silverbullit05** » Wed Mar 26, 2008 11:29 am

ok so now ive moved to the exhaust cause a performance shop said that with the spacer the engine is taking in more air and that the exhaust is restricked. ive just purchased the stillin 3 in catback system im hoping this was a good exhaust choice.

Post by **ryan_g35** » Wed Mar 26, 2008 12:39 pm

hey joe i can't rember all that well but for the 06 auto the mrev2 doesnt help as much or at all. do correct me if im wrong

Post by **G_whizz** » Wed Mar 26, 2008 3:29 pm

Coupled with a spacer... you will see very noticeable gains.

silverbullit05 wrote:ok so now ive moved to the exhaust cause a performance shop said that with the spacer the engine is taking in more air and that the exhaust is restricked. ive just purchased the stillin 3 in catback system im hoping this was a good exhaust choice.

Stillen FTW!!

Excellent choice!

Post by **silverbullit05** » Thu Mar 27, 2008 12:07 am

well i have ordered the stillin true dual exhaust at first i was looking at the single pass exhaust by still but it is like 3 in tubing. so i called and the guy at stillen said id be much happier with true daul performance wise. so i went with that and he even threw in a grounding harness for free. plus free shipping now for a limited time. cant beet that deal.

Post by **joe603** » Thu Mar 27, 2008 6:32 am

ryan_g35 wrote:hey joe i can't rember all that well but for the 06 auto the mrev2 doesnt help as much or at all. do correct me if im wrong

From what I've read, any 05+ REVUP cars will benefit from the MREV2 plenum. Just make sure and get the spacer as well.

Post by **Tampa G35 Sedan 6MT** » Thu Mar 27, 2008 7:01 am

lol but don't for get that it will void the warranty

DJ

Post by **G_whizz** » Thu Mar 27, 2008 7:41 am

Tampa G35 Sedan 6MT wrote:lol but don't for get that it will void the warranty

DJ

Wrong!!

It will only void the warranty should a problem occur directly related to the mod. They would have to prove it as well.

Post by **Tampa G35 Sedan 6MT** » Thu Mar 27, 2008 7:43 am

G_whizz wrote:
Wrong!!

It will only void the warranty should a problem occur directly related to the mod. They would have to prove it as well.

are you sure?? I think the dealership would pin that on me and i would be screwed.

Post by **G_whizz** » Thu Mar 27, 2008 7:58 am

From what I have seen previously posted by Q45tech...really in the end is up to each service department anyways.

This topic has been discussed before, but I am very positive it will not void your warranty.

I have a leased G... look at all my mods. I've never had a problem when in for service (with my 05 that I had)

Post by **joe603** » Thu Mar 27, 2008 9:02 am

I've been told by service managers and techs that they will warranty the car as long as the mod/owner didn't cause the failure.

I use the analogy of if you put on a supercharger and your seat stops working, they will fix the seat; but if you throw a rod out your block, they will not fix it (under warranty) because it was caused by the SC.

Post by **HBG35Coupe** » Fri Mar 28, 2008 8:28 am

Anyone use the Powerlab spacer? Comments?

plenum spacers help people????

plenum spacers help people????

Re: plenum spacers help people???? (silverbullit05)

Re: plenum spacers help people???? (RED_DET)

Re: plenum spacers help people???? (silverbullit05)

Re: (joe603)

Re: (tollboothwilley)

Re: plenum spacers help people???? (silverbullit05)

Re: plenum spacers help people???? (CYO44Baseball32)

Re: plenum spacers help people???? (silverbullit05)

Re: plenum spacers help people???? (Andy_V35Sky_350GT)

Re: plenum spacers help people???? (tollboothwilley)

Re: plenum spacers help people???? (joe603)

Re: plenum spacers help people???? (Sentientbydesign)

Re: plenum spacers help people???? (joe603)

Re: plenum spacers help people???? (silverbullit05)

Re: plenum spacers help people???? (silverbullit05)

Re: plenum spacers help people???? (G_whizz)

Re: plenum spacers help people???? (silverbullit05)

Re: plenum spacers help people???? (silverbullit05)

Re: plenum spacers help people???? (joe603)

Re: plenum spacers help people???? (ryan_g35)

Re: plenum spacers help people???? (silverbullit05)

Re: plenum spacers help people???? (ryan_g35)

Re: plenum spacers help people???? (joe603)

Re: plenum spacers help people???? (Tampa G35 Sedan 6MT)

Re: plenum spacers help people???? (G_whizz)

Re: plenum spacers help people???? (Tampa G35 Sedan 6MT)

Nissan Forums

Infiniti Forums

Datsun Forums

Technical Forums

Classifieds / Marketplace

Nissan Motorsports

General Forums