Pardon my n00b question:

I tried doing a search but couldn't find anything substantial on people referring to the 05 6mt as having the "Rev-up" engine.

Can someone point me in the right direction, or shed some light on this for me?

Thanks!

 

If you compare with G35 03/04 engines Versus the '05/06 6mt engines you will see an increase in Horsepower from 280 to 300. This is because Infiniti tweaked out the newer model engines with a new plenum, higher redline, and a few other changes. That is why it's referred to as the "rev-up" engine, it's been tweaked for the newer models.

 

So "rev-up" is not an official name... just that it has a higher redline... thus the name.

Cool. Thanks!

 

What are the exact changes by the way? I mean I keep hearing "they changed a few things like the plenum and ecu" but what is the big difference. If the 03 and 04 6mt were to get the 05 plenum and ECU how would we be different and don't say that they changed a few internals? If you say a few internals, then what are they? Can the 03 or 04 6mt do anything (other than replace the 03/04 with a 05 or replace the complete engine) to have the "REV-UP" motor. Get the ECU, plenum, and the exhaust cam? Would that do it? If not, then say what it would to make that conversion.

 

I think the flywheel is lightened as well.

 

Don't forget you lose 10 ft/lb torque with the rev-up engine. There is alot of debate over which is better torque or HP we don't need to get into that. I wouldn't let the engine decide which year model to purchase. With the non-revup engine you can add a plenum and get close to the HP of the rev-up and have close to 20 ft/lb torque advantage. I think the biggest change for the rev-up is the Variable Exhaust Timing along with a redesigned plenum. The rev-ups have not responded well to plenum mods.

 

The other thing to keep in mind, is that those HP and torque figures are max numbers. What you want to really look at is the area under the torque curve, and specifically the area under the torque curve from about 2000 to 5000 rpms, which is the area in which most normal people drive when they are not "living their lives one quarter mile at a time"

I think, though I may be mistaken, that the '05's have more area under the usable areas of the torque curve than the 03-04's. But I could be mistaken.

Dave

 

yeah...i am not a huge fan of this 05 6MT regarding lose torque more hp thing.
w/ a simple mod, you can get advantage over 05 6MT on previous 6MT models. however, interior makes the difference

 

Mine dynoed the same as my 04 did stock. You don't actually lose TQ at least not mine.


Rods, Pistons, Intake Manifold, Exhaust, many things were changed. Stronger crank, and reinforced block.

 

I think the crank, block, and pistons are the same..

Changes I know for sure are:
Rods (Stronger)
Rod Bolts (Stronger)
Variable Valve on INTAKE and EXHAUST side (previous motors only had it on intake)
Intake Manifold - or as we call "plenum"
Clutch is different
New ECU - THAT SOMEONE NEEDS TO CRACK!!!

 

Thanks everyone. So basically if both a 03/04 and a 05 decided to go FI and they both ended up rebuilding the internals (plus the 05 ecu) they would basically be the same? I mean, when an engine is built for FI the rods would be replaced anyway. But what about the Variable Valve Exhaust? Can you buy 05's and put it in a 03/04 with a ECU change? And having a Technosquare ECU wouldn't that make a 03/04 engine a "REV-UP"? The redline at that point would be the same wouldn't it?

I'm not trying to say that one engine is better than the other (I have an 03.5 6mt) but I do have to say that 05 does seem more appeasing, but if it takes just buying a few parts then in my opinion it doesn't matter which engine you have after all, right?

I would like to keep up with those M3's just like those other guys but I don't want to have to go purchase a 05 g35 if you know what I mean.

 

no, the 05 will still have the advatange of variable valve.. and as far as i know.. no one has cracked the 05 ECU.. the technosquare ecu is a reflash no? if its a standalone then u loose same advantages of the OEM ECU.. i think the only option we have on an 05 is piggyback or standalone.. unless technosquare does have a reflash for us (which i need).

and to keep up with an M3 isnt too hard.. u just have to know what you're doing.. i know a few 04-03s who are making more power then me with out FI..

If you decide to rebuild the motor for any reason turbo, supercharger, nitrous, or just pure sexy N/A.. you can pretty much make it rev however high u want and do whatever u want.. just depends on how far you want to go.

 

Although I don't doubt that on the day you dynoed your car that it had the same torque that the manufacturer claims on a 04, however it wasn't the same dyno that they use so it isn't a good compairson. The manufacturer claims 10 less so likely they are correct.

 

If one gets technosquare ECU upgrade for 03 & 04
is that the same as the new REV-UP engine 2005?

 

I beg to differ... On my '05 6MT G35 sedan

I have a Crawford plenum and it works better than I expected. I dyno consistantly 282-285hp and 264-266 pft torque to the wheels on a dynojet 248E with the mods below.

Crawford plenum
Crawford hi-flow cats
Crawford headers
cleaned up throttlebody
cleaned up lower plenum
Fujitsubo Legalis-R exhaust system
UR underdrive crank pulley
JWT pop-charger

I lost power and performance with only one mod I tried (UTR Y-pipe)

I would say that the '05 rev-up cars respond (much) *BETTER* to mods than the non rev-up cars. And yes, I have modded both (an '04 6MT G35 Coupe and a base '04 350Z). Modding the '04s was a huge dissapointment!