Nice! Once you get those new shoes on her, you'll have to tell us how everything works out. Upgraded brakes, new wheels and tires, and a lower plenum upgrade. I'm jealous!

Let us know how those stickers register on the butt dyno- :nana:

 

QUOTE ([Cerberus] @ Mar 31 2009, 11:44 AM) index.php?act=findpost&pid=572459

Side by side comparisons. You can see that the runners are longer and smaller on the MREV2 (on the left)[/b]

:dunno: I don't get it. How can that MREV design improve performance? I guess I haven't read much about it since I got the Crawford plenum.

 

QUOTE (SmoothZ @ Apr 1 2009, 06:24 AM) index.php?act=findpost&pid=572477

:dunno: I don't get it. How can that MREV design improve performance? I guess I haven't read much about it since I got the Crawford plenum.

Hi Guys I don't mean to be kicking a dead horse but I can't find any more info on how the MREV 2 really makes a difference with the Plenum Spacer on a rev up engine.

I used to have a plenum spacer on the car, and parted the mods to sell but the car came back to me.

Now I'm thinking about doing her up again, but after coming across this info I'm trying to figure out if its necessary. If I remember correctly without the MREV 2 it still pulled like crazy and was an improvement over stock.

I used to run the Pure Innovations Plenum Spacer.

 

I am not completely sure, it is all in the design of the lower plenum. The MREV is just a modified VQDE plenum. I am assuming that the shorter more open runners on the rev up lower plenum is what makes the higher top end HP, verse the tighter longer runners which put more down low.

If you have a 2005 or older, the MREV plenum will not make much if any difference. The biggest areas of improvements come on the rev up motors where everything was changed.

I would send Motordyne an e-mail and see if they can explain it better then I can. I know they have a rep on my350, he may also be able to explain it better then I can.

 

Cool cool, so from what I understand, there are still gains to be had with a normal spacer, regardless with or without the MREV2, its just with the lower plenum from an older model DE it would have the best overall gains?

 

Correct, on the Rev up models the Mrev2 and a spacer provide the most gains. Just having the spacer on a DE motor will provide gains, and putting an Mrev on it from what I have read, will not do much if anything extra.

 

Thanks man, that's helped a whole lot!

 

My understanding differs slightly.

On a rev-up, which you have, you will produce better gains by getting the MREV2 with the spacer. In fact, on a rev-up engine the MREV2 is where the gains are produced. MD have conducted their own testing and determined that the spacer is not very effective at all on those engines without the MREV2.

 

QUOTE (Aust350z @ Feb 16 2010, 04:43 PM) index.php?act=findpost&pid=591870

My understanding differs slightly.

On a rev-up, which you have, you will produce better gains by getting the MREV2 with the spacer. In fact, on a rev-up engine the MREV2 is where the gains are produced. MD have conducted their own testing and determined that the spacer is not very effective at all on those engines without the MREV2.

of course they've done their own testing and determined that the spacer is not very effective without the MREV2... what's the point in owning a company?

 

Well lying to your customers is a great way to build trust and respect in your company.

Motordyne say:

QUOTE

The spacer does not make power on the stock REVUP lower plenum. It can however make gains on the revup engine when when used on a non-revup plenum or MREV2.

If you have any one of the MREV series lower plenums, the spacer will indeed make good gains on the revup engine. It just that the spacer won't make gains on the stock revup lower plenum.

Now check-out post #18 made by Motordyne in this thread. The analysis was:

QUOTE

The real result of a spacer on a REVUP lower collector = Zero.

There are plenty of other posts/threads around here (and other sites) that support that gains can not be made on a rev-up lower collector and the best mod for that engine is not the spacer but the MREV2.

To Zamski: non rev-up - plenum spacer only is required; rev-up - the MREV2 is at least a pre-requiste for the spacer

 

Again that's great info, fellas. It really gives me a great idea of where i wanna go with this.

Thanks a bunch.

 

Thanks for the extra detail. I think that is what I was trying to get across, maybe I failed at explaining it correctly.

 

So an aftermarket plenum wouldn't help a DE motor?

 

how much money do you have to spend?

 

Well I'm not looking to spend anything if there's no gains to be made. I've already got the 5/16 ISO spacer. I've just seen all kinds of comments on how the DE motors don't really benefit from the mrev but I haven't found anything else on plenums that do help. I'm just curious. Options? Im just gonna stick with the spacer unless any extra improvements can be made.

 

real rough…for purely engine mods -

$1k - $2k, intake and exhaust mods +35whp

$7k - $10k, bolt-on supercharger/single turbo kit +130whp

$15k, engine rebuild/additional engine support, twin turbo +300whp

$30k, full engine rebuild, massive engine support, twin turbo +500whp