Quote:
so am I a Rev-up or non-rev up?
No automatics have ever been revup. Only 05-07 G35 Coupe 6MT's & 05-06 G35 Sedan 6MT's have the revup engine.Originally Posted by donot521
I have a 2005 G35 coupe 5AT with sport packageso am I a Rev-up or non-rev up?
.
Former G35driver Vendor
Quote:
Correct.Originally Posted by BlueDevilBAMF
Based upon the description from Motordyne quoted above it seems that for the cost, it might not really be worth doing MREV 2 on a non Revup VQ such as my own. They seem to say that while I will gain some area under the curve, the gains above and beyond what I already see from my spacer won't be much.
The generally only recommed doing both on a non-revup engine is if:
1) Your A/F ratio is good. (If this is good it will make about 4-6 more HP in the midrange.)
and
2) You are either a hard core racer or a dyno junkie.
---
OTOH if you have a REVUP engine, its just the opposite, I almost always recommend doing both.
Since Dave's graphs were all the exact same scale, I was able to accurately photoshop his baseline with this latest graph..
Stock vs Exhaust, intake, spacer, MREV2
Stock vs Exhaust, intake, spacer, MREV2
Former G35driver Vendor
Good job with the photoshop Henry!
That plot shows some great gains and area under the curve.
That plot shows some great gains and area under the curve.
Registered User
Quick question, is this the 5/16" kit you purchased?
http://www.g35parts.com/9083/osc/pro...roducts_id=319
http://www.g35parts.com/9083/osc/pro...roducts_id=319
Registered User
It seems like much of that was from the exhaust. What do you mean by "exhaust?" Did you do headers, test pipes, cat back?
NVM, I trolled around and found another thread of yours with dyno. The results seem consistent with what I saw above.
NVM, I trolled around and found another thread of yours with dyno. The results seem consistent with what I saw above.
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The graph below is the Stillen full cat-back on my '06 G35 6MT vs the OE cat-back.
The graph below is the Stillen full cat-back on my '06 G35 6MT vs the OE cat-back.
Registered User
i am new to this..
does the plenum spacer change the sound of the engine/exhaust too?
does the plenum spacer change the sound of the engine/exhaust too?
Lolly Baggins, yup that's the one I'm running.
Paniller, for this test we only installed a catback exhaust. I have, however, subsequently installed headers and high-flow cats, but those came a few months after we did the intake mods including the MotorDyne stuff and the Stillen intake and catback true dual exhaust.
haagen_daz, I never drove the car with just the MotorDyne mods since we tested some other parts on the dyno that same day, but given that the plenum spacer does increase the overall volume of the plenum it might deepen the sound of the intake charge a bit by virtue of changing the resonance or harmonics of the overall intake tract and the plenum/manifold itself. Tony from MotorDyne can tell you more about sound if you shoot him an e-mail.
Paniller, for this test we only installed a catback exhaust. I have, however, subsequently installed headers and high-flow cats, but those came a few months after we did the intake mods including the MotorDyne stuff and the Stillen intake and catback true dual exhaust.
haagen_daz, I never drove the car with just the MotorDyne mods since we tested some other parts on the dyno that same day, but given that the plenum spacer does increase the overall volume of the plenum it might deepen the sound of the intake charge a bit by virtue of changing the resonance or harmonics of the overall intake tract and the plenum/manifold itself. Tony from MotorDyne can tell you more about sound if you shoot him an e-mail.
Former G35driver Vendor
Quote:
does the plenum spacer change the sound of the engine/exhaust too?
On your engine, the 5/16" spacer will change the induction sound modestly. You have to listen for it to hear it.Originally Posted by haagen_dazs
i am new to this..does the plenum spacer change the sound of the engine/exhaust too?
On a REVUP engine the MREV2/spacer combo will change the engine sound substantially. Its louder, deeper and easily noticed.
Registered User
on my car (non revup) with 1/2" spacer the engine is notably throatier.
Registered User
Correct me on this.. I have an 05 6MT.
so the MREV2's are made from an 04 lower plenum, and the top of each intake is shaved down to give better flow...
wouldnt adding a spacer to a revup engine give similar clearance over the top of each induction tube(or whatever the correct name is) so it would be pretty similar to having a revup with the MREv2 lower plenum and no spacer ?
but you get better overall gains by having even more clearance with both ?
so the MREV2's are made from an 04 lower plenum, and the top of each intake is shaved down to give better flow...
wouldnt adding a spacer to a revup engine give similar clearance over the top of each induction tube(or whatever the correct name is) so it would be pretty similar to having a revup with the MREv2 lower plenum and no spacer ?
but you get better overall gains by having even more clearance with both ?
Registered User
Quote:
so the MREV2's are made from an 04 lower plenum, and the top of each intake is shaved down to give better flow...
wouldnt adding a spacer to a revup engine give similar clearance over the top of each induction tube(or whatever the correct name is) so it would be pretty similar to having a revup with the MREv2 lower plenum and no spacer ?
but you get better overall gains by having even more clearance with both ?
The MREV2 also has different length intake runners (induction tubes haha) than the revup models lower plenum has. For some reason adding a spacer on the revup engine does nothing. The spacer only benefits an MREV plenum or a non revup plenum. Theres quite a few threads and a dyno chart here and there that show what the spacer does on a revup...Originally Posted by cmesidewayz
Correct me on this.. I have an 05 6MT.so the MREV2's are made from an 04 lower plenum, and the top of each intake is shaved down to give better flow...
wouldnt adding a spacer to a revup engine give similar clearance over the top of each induction tube(or whatever the correct name is) so it would be pretty similar to having a revup with the MREv2 lower plenum and no spacer ?
but you get better overall gains by having even more clearance with both ?
See this link
https://g35driver.com/forums/engine-...um-spacer.html
Registered User
Seems intuitive but I'm guessing the spacer and lower plenum will help with airflow on FI applications as well?