Does the Cosworth plenum give any gains for N/A?
Does the Cosworth plenum give any gains for N/A?
Anyone actually installed the Cosworth plenum in a non-turbo VQ35 and done a valid dyno before & after comparison?
I know it's too much money to spend for the amount of gains, I'm just curious.
I know it's too much money to spend for the amount of gains, I'm just curious.
im not sure if there is anyone who has done it on their NA set-up, simply because its right around 1000 dollars, and you can get the same results for much cheaper with just a spacer.
however, with a FI car, the plenum HAS shown amazing power increases over other plenum choices at 6000 rpm's and beyond...if you go to the FI Forum it is somewhere on the last few pages of unposted material.
however, with a FI car, the plenum HAS shown amazing power increases over other plenum choices at 6000 rpm's and beyond...if you go to the FI Forum it is somewhere on the last few pages of unposted material.
Originally Posted by ke0ki2k
can yall link me to that test of a N/A car with a cosworth manifold? cant find it in the FI forums.
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Originally Posted by 2004Black350z
why would u want to spend that much money on it if ur NA>?
Some may like the look of it coupled with the gains, even though similar gains can likely be had on a N/A setup with spacer/Mrev for cheaper.
My
Originally Posted by 2004Black350z
why would u want to spend that much money on it if ur NA>?
Originally Posted by jonnylaw
Originally Posted by Cloud
it drops off past 6400 rpm?
For N/A, it looks like Mrev/spacer combo, where mid range is gained, and some top end is lost.
For F/I, there seems to be loss in the mid range, but very good gains high in the powerband (6k+).
Seems like opposite results, but maybe more testing is needed
Tony's (MD) take:
Originally Posted by Hydrazine
Xlr8r,
I believe the NA setup was a comparison of the REVUP lower plenum against the Cosworth. (Note: The REVUP lower plenum, by design, exchanges midrange power for a small boost at the high end.) So the results come as no surprise.
But yes, this is an interesting and perplexing comparison.
On a NA REVUP engine, the Cosworth looks somewhat like a MREV/spacer setup. The Cosworth made good midrange gains and dropped off slightly at the high end. ...this comparison makes the Cosworth look like a lower frequency tune plenum.
On a FI NON-REVUP engine, the Cosworth looks somewhat like a REVUP lower plenum?... It lost midrange gains and made good gains at the high end. ...this comparison makes the Cosworth look like a higher frequency tuned plenum.
So far, the data seems contradictory, but it may not be contraditory at all. When working from the established paradigme of what we already know about intake plenum mods, trends and performance, this new Cosworth may not be in the same universe of plenum performance rules. It may have its own set of rules.
A lot more testing may be needed to really know what the Cosworth plenum is all about.
I believe the NA setup was a comparison of the REVUP lower plenum against the Cosworth. (Note: The REVUP lower plenum, by design, exchanges midrange power for a small boost at the high end.) So the results come as no surprise.
But yes, this is an interesting and perplexing comparison.
On a NA REVUP engine, the Cosworth looks somewhat like a MREV/spacer setup. The Cosworth made good midrange gains and dropped off slightly at the high end. ...this comparison makes the Cosworth look like a lower frequency tune plenum.
On a FI NON-REVUP engine, the Cosworth looks somewhat like a REVUP lower plenum?... It lost midrange gains and made good gains at the high end. ...this comparison makes the Cosworth look like a higher frequency tuned plenum.
So far, the data seems contradictory, but it may not be contraditory at all. When working from the established paradigme of what we already know about intake plenum mods, trends and performance, this new Cosworth may not be in the same universe of plenum performance rules. It may have its own set of rules.
A lot more testing may be needed to really know what the Cosworth plenum is all about.
Last edited by jonnylaw; Feb 3, 2008 at 02:18 PM.
Originally Posted by Vader007
Actually the very first review done by Injected Performance was on a stock N/A car.
1. 100% Stock (not turbo)
2. Stock, but with a reflash and tune by Uprev
3. Cosworth plenum, without reflash/tune
4. Cosworth plenum, with reflash and tune
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Bought from Adam @ Z-1. . .I can't really do a before/after dyno because my engine for the 240 is getting built and I do not have a base dyno for the G. . .I'll see if I can grab someone in Edmonton that's willing to let me to a comparison on their Z/G. . .
^Gotcha. Mine arrives from ip today, install wed. And then to the same dyno that I ran with all my mods including mrev2,5/16 spacer. I'm interested to see how the cos stacks up to the proven MD combo on revup na's. Ill post my results here.
Originally Posted by jonnylaw
^Gotcha. Mine arrives from ip today, install wed. And then to the same dyno that I ran with all my mods including mrev2,5/16 spacer. I'm interested to see how the cos stacks up to the proven MD combo on revup na's. Ill post my results here.
