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What Is Mrev?

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Old 04-15-2006, 01:18 AM
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What Is Mrev?

I just bought my 06 coupe in December. I have been researching the best ways to gain more power w/out forced induction. MREV keeps coming up - can someone please tell me what it is and how it works?
Old 04-15-2006, 01:21 AM
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motordyneengineering.com or search it, there's tons of info on it.
Old 04-15-2006, 01:27 AM
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welcome to the boards. when in doubt, search it!
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Old 04-15-2006, 02:44 AM
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Quote:
Originally Posted by JBKFizzle45
I just bought my 06 coupe in December. I have been researching the best ways to gain more power w/out forced induction. MREV keeps coming up - can someone please tell me what it is and how it works?
The FULL mRev Kit includes a Lower Plenum [AKA part of the intake manifold that houses the runners].

To keep things simple.. How air flows from your intake tube to your combustion chamber can have a BIG effect on performance. (Hence why people Port and Polish heads or have a Head Job Performed on their fully raced rebuilt motor). Our intake manifolds have 6 runners that are housed in the lower plenum. mRev simply modifies the runners for more of a Street use.. From 2005 and up the 6MT (298hp) engine has been redesigned to rev up to 7,000RPM (Done by adding stronger rods and rod bolts) now for Infiniti to take full advantage of the new 400rpms they re-designed their intake manifold with shorter runners for more top end power. To gain this top end power they sacraficed alot of low end torque.. "eh? how?" think of your engine as a giant air pump.. now if a runner is longer it'll allow air velocity to increase.. because our cars are not equiped with a supercharger or turbo it depends on velocity to push air into the combustion chamber.. Cause Infiniti shortened the runners it caused the air to loose some of its velocity.. kinda like sucking on a straw.. try breating through a straw.. easy huh? okey now go get a toilet paper roll and breath through that.. Now do the same thing but while running. To keep it simple.. Infiniti allowed the engine to breath easyer at higher RPMs (more air) but in return caused it to loose some of that low end torque (loss of velocity)..

mRev replaces the long runners with shorter runners like the 03-04 BUT they add a twist to it.. If they were to simply replace the long runners into shorter ones you'll loose ALOT of top end power. but in return you'll gain ALOT of mid range.. around +25tq at 4000RPM-ish on a dynapack.. BUT you end up loosing alot of HP in the upper 600RPMS since the engine isnt getting the amount of air it is designed to (valve lift, cam shaft..) So to keep things simple.. you've turned ur 2005-06 6MT G35 back into a 03-04 6MT... to fix this motordyne's added a 5/16th spacer and machined part of the runners for #1 and #2 cylinders. by doing so they've increased the total volume of the intake plenum allowing the engine to breath at the upper RPMS (more horsepower). So why do we only use a 5/16 and not a 1/2"? the 1/2" will slow air velocity down too much and ruin that nice mid range torque and hp... but by using the 1/2" you bearly loose any top end if any at all (if i recall it was like 1-2hp) with a slight increase in mid-range torque.. since daily driving is done at 2-4k rpm and torque is what gets you out of the hole its not worth using the 1/2"

So to answer your question.. mrev includes
a lower plenum and 5/16" spacer..

add-ons include
ISO THERMAL KIT: manifold gasket and a Coolant control valve
Copper ISO THERMAL KIT: manifold gaskets and a copper throttle body heater

IMO if your in a warm area (that doesnt snow) get the mRev Plus with ISO Thermal kit.. you wont regret it
Old 04-15-2006, 03:48 PM
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just incase anyone wants the info

bump bump
Old 04-15-2006, 04:46 PM
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this should probably be stickied
Old 04-15-2006, 04:53 PM
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oh yeah totally. sticky this. and also sticky any random thread that has a question mark in it.
Old 04-17-2006, 10:17 PM
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Quote:
Originally Posted by Klumzyee
The FULL mRev Kit includes a Lower Plenum [AKA part of the intake manifold that houses the runners].

To keep things simple.. How air flows from your intake tube to your combustion chamber can have a BIG effect on performance. (Hence why people Port and Polish heads or have a Head Job Performed on their fully raced rebuilt motor). Our intake manifolds have 6 runners that are housed in the lower plenum. mRev simply modifies the runners for more of a Street use.. From 2005 and up the 6MT (298hp) engine has been redesigned to rev up to 7,000RPM (Done by adding stronger rods and rod bolts) now for Infiniti to take full advantage of the new 400rpms they re-designed their intake manifold with shorter runners for more top end power. To gain this top end power they sacraficed alot of low end torque.. "eh? how?" think of your engine as a giant air pump.. now if a runner is longer it'll allow air velocity to increase.. because our cars are not equiped with a supercharger or turbo it depends on velocity to push air into the combustion chamber.. Cause Infiniti shortened the runners it caused the air to loose some of its velocity.. kinda like sucking on a straw.. try breating through a straw.. easy huh? okey now go get a toilet paper roll and breath through that.. Now do the same thing but while running. To keep it simple.. Infiniti allowed the engine to breath easyer at higher RPMs (more air) but in return caused it to loose some of that low end torque (loss of velocity)..

mRev replaces the long runners with shorter runners like the 03-04 BUT they add a twist to it.. If they were to simply replace the long runners into shorter ones you'll loose ALOT of top end power. but in return you'll gain ALOT of mid range.. around +25tq at 4000RPM-ish on a dynapack.. BUT you end up loosing alot of HP in the upper 600RPMS since the engine isnt getting the amount of air it is designed to (valve lift, cam shaft..) So to keep things simple.. you've turned ur 2005-06 6MT G35 back into a 03-04 6MT... to fix this motordyne's added a 5/16th spacer and machined part of the runners for #1 and #2 cylinders. by doing so they've increased the total volume of the intake plenum allowing the engine to breath at the upper RPMS (more horsepower). So why do we only use a 5/16 and not a 1/2"? the 1/2" will slow air velocity down too much and ruin that nice mid range torque and hp... but by using the 1/2" you bearly loose any top end if any at all (if i recall it was like 1-2hp) with a slight increase in mid-range torque.. since daily driving is done at 2-4k rpm and torque is what gets you out of the hole its not worth using the 1/2"

So to answer your question.. mrev includes
a lower plenum and 5/16" spacer..

add-ons include
ISO THERMAL KIT: manifold gasket and a Coolant control valve
Copper ISO THERMAL KIT: manifold gaskets and a copper throttle body heater

IMO if your in a warm area (that doesnt snow) get the mRev Plus with ISO Thermal kit.. you wont regret it
Ya know it's kind, detailed replies like that that make these forums work!!! Nice Job and very nice reply with very accurate response.
Old 04-17-2006, 10:32 PM
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Quote:
Originally Posted by codeflux
oh yeah totally. sticky this. and also sticky any random thread that has a question mark in it.
Absolutely...especially when random noobs keep asking this question once a day.
Old 04-17-2006, 10:44 PM
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brilliant
Old 04-17-2006, 11:32 PM
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Quote:
Originally Posted by bosssho
Ya know it's kind, detailed replies like that that make these forums work!!! Nice Job and very nice reply with very accurate response.
I have to agree. I've been on this website everyday for about 2-3 months soaking up info and not seen as good of an answer to this. I've learned something nu and for that: THANKS FOR POSTING THIS NU THREAD!!!!!

Props to Klumzyee for not wasting your time and not making JBKFizzle45 feel lame for posting his Q by saying..... "uh, go search".

Thats the most retarded thing. IMO: If you don't wanna ANSWER the Q then dont waste the time or effort in a lame response.
Old 04-18-2006, 12:13 AM
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great post Eric
Old 04-18-2006, 03:59 PM
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Quote:
Originally Posted by Klumzyee
So why do we only use a 5/16 and not a 1/2"? the 1/2" will slow air velocity down too much and ruin that nice mid range torque and hp... but by using the 1/2" you bearly loose any top end if any at all (if i recall it was like 1-2hp) with a slight increase in mid-range torque.. since daily driving is done at 2-4k rpm and torque is what gets you out of the hole its not worth using the 1/2"

So to answer your question.. mrev includes
a lower plenum and 5/16" spacer..

Does this also apply to the combination of a Crawford V5 plenum and the MREV++? Will the Crawford slow down the velocity too much and ruin the TQ/HP gains the MREV++ produces? Thanks.
Old 04-18-2006, 04:58 PM
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The Crawford plenum and the MREV+ both solve the same proble with fuel distribution to the front cylinders. Using both together might be too much of a good thing.

If you have a Crawford plenum, I'd skip the Plus part of the MREV.
Old 04-19-2006, 09:42 AM
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Quote:
Originally Posted by Klumzyee
The FULL mRev Kit includes a Lower Plenum [AKA part of the intake manifold that houses the runners].

To keep things simple.. How air flows from your intake tube to your combustion chamber can have a BIG effect on performance. (Hence why people Port and Polish heads or have a Head Job Performed on their fully raced rebuilt motor). Our intake manifolds have 6 runners that are housed in the lower plenum. mRev simply modifies the runners for more of a Street use.. From 2005 and up the 6MT (298hp) engine has been redesigned to rev up to 7,000RPM (Done by adding stronger rods and rod bolts) now for Infiniti to take full advantage of the new 400rpms they re-designed their intake manifold with shorter runners for more top end power. To gain this top end power they sacraficed alot of low end torque.. "eh? how?" think of your engine as a giant air pump.. now if a runner is longer it'll allow air velocity to increase.. because our cars are not equiped with a supercharger or turbo it depends on velocity to push air into the combustion chamber.. Cause Infiniti shortened the runners it caused the air to loose some of its velocity.. kinda like sucking on a straw.. try breating through a straw.. easy huh? okey now go get a toilet paper roll and breath through that.. Now do the same thing but while running. To keep it simple.. Infiniti allowed the engine to breath easyer at higher RPMs (more air) but in return caused it to loose some of that low end torque (loss of velocity)..

mRev replaces the long runners with shorter runners like the 03-04 BUT they add a twist to it.. If they were to simply replace the long runners into shorter ones you'll loose ALOT of top end power. but in return you'll gain ALOT of mid range.. around +25tq at 4000RPM-ish on a dynapack.. BUT you end up loosing alot of HP in the upper 600RPMS since the engine isnt getting the amount of air it is designed to (valve lift, cam shaft..) So to keep things simple.. you've turned ur 2005-06 6MT G35 back into a 03-04 6MT... to fix this motordyne's added a 5/16th spacer and machined part of the runners for #1 and #2 cylinders. by doing so they've increased the total volume of the intake plenum allowing the engine to breath at the upper RPMS (more horsepower). So why do we only use a 5/16 and not a 1/2"? the 1/2" will slow air velocity down too much and ruin that nice mid range torque and hp... but by using the 1/2" you bearly loose any top end if any at all (if i recall it was like 1-2hp) with a slight increase in mid-range torque.. since daily driving is done at 2-4k rpm and torque is what gets you out of the hole its not worth using the 1/2"

So to answer your question.. mrev includes
a lower plenum and 5/16" spacer..

add-ons include
ISO THERMAL KIT: manifold gasket and a Coolant control valve
Copper ISO THERMAL KIT: manifold gaskets and a copper throttle body heater

IMO if your in a warm area (that doesnt snow) get the mRev Plus with ISO Thermal kit.. you wont regret it

damn that was awesome... I feel like I should have a smoke now.

I used the search and read a ton of threads but never seen it laid down like that. THANKS!!!

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