Manual Upgrades vs. Auto Upgrades

DEpointfive0 · 09-23-2014, 06:44 PM

Quote:

Originally Posted by RLami

A mod on an AT vs. a MT car will make the same power either way. It's the difference in parasitic driveline losses incurred by each transmission type that will affect final power output at the wheels on a dyno.

I am not familiar with the specific AT/MT parasitic driveline losses on the Z, but I'm sure if you do some research on dyno numbers of stock AT vs. stock MT, you might have your answer, but each dyno is different so it's hard to say.

General rule of thumb dictates that the loss on a MT is 15% and the loss on an auto is 20%. That being said, on the 370Z they both SEEM to be around the same, if anything 15% for the MT and 17% for the 7AT

RLami · 09-23-2014, 07:03 PM

Quote:

Originally Posted by DEpointfive0

General rule of thumb dictates that the loss on a MT is 15% and the loss on an auto is 20%. That being said, on the 370Z they both SEEM to be around the same, if anything 15% for the MT and 17% for the 7AT

That's what I figured, but without researching it myself I'd leave it up to the likes of you and others lol. It's just very hard to pin a % down with differences in dynos, unless someone is actually doing a controlled test for that reason.

roadrash666 · 09-23-2014, 07:17 PM

DE is pretty much spot on, the 7AT is a pretty efficient(and if driven correctly)and quick shifting transmission. The modifications will give the same net increase with either transmission. The total numbers may be slightly lower with the AT although not by much.

DEpointfive0 · 09-23-2014, 07:23 PM

Quote:

Originally Posted by roadrash666

DE is pretty much spot on, the 7AT is a pretty efficient(and if driven correctly)and quick shifting transmission. The modifications will give the same net increase with either transmission. The total numbers may be slightly lower with the AT although not by much.

The biggest difference, or what should be the center of attention is modability. The 7AT will do fine with bolt ons, some will argue it will hold a SC with low torque figures with mild upgrades (tune for line pressure, trans cooler and maybe even VB upgrade) but the 6MT will always be best for high power applications and modability. Lightweight flywheel, different clutch, no need to cool the fluid, etc... Biggest disadvantage is the CSC/CMC.

occarclub · 09-23-2014, 07:56 PM

Quote:

Originally Posted by DEpointfive0

The biggest difference, or what should be the center of attention is modability. The 7AT will do fine with bolt ons, some will argue it will hold a SC with low torque figures with mild upgrades (tune for line pressure, trans cooler and maybe even VB upgrade) but the 6MT will always be best for high power applications and modability. Lightweight flywheel, different clutch, no need to cool the fluid, etc... Biggest disadvantage is the CSC/CMC.

Thanks for the descriptive responses! You, my good sir, are a true Z God.

DEpointfive0 · 09-23-2014, 08:08 PM

Quote:

Originally Posted by occarclub

Thanks for the descriptive responses! You, my good sir, are a true Z God.

Lol, no problem. You didn't ask what I feel to be a stupid easy search bullshít question, so I'm more than happy to help.

What are you using the car for? That should dictate what trans you should go with

Personally I wouldn't support ArmyTrix though, just me though...

DavidZ370 · 09-23-2014, 08:51 PM

Quote:

Originally Posted by DEpointfive0

Lol, no problem. You didn't ask what I feel to be a stupid easy search bullshít question, so I'm more than happy to help.

What are you using the car for? That should dictate what trans you should go with

Personally I wouldn't support ArmyTrix though, just me though...

Makes two

FPenvy · 09-24-2014, 12:05 PM

Quote:

Originally Posted by DEpointfive0

General rule of thumb dictates that the loss on a MT is 15% and the loss on an auto is 20%. That being said, on the 370Z they both SEEM to be around the same, if anything 15% for the MT and 17% for the 7AT

oooooo do me! do me! whats my % loss

i will say for a 7AT with minimal mods and a tune i hit a decent WHP # and 1/4 ET

09-23-2014, 07:17 PM	#3 (permalink)
roadrash666 Base Member Join Date: Mar 2014 Location: florissant mo Posts: 90 Drives: 2008 G37 coupe Rep Power: 12	DE is pretty much spot on, the 7AT is a pretty efficient(and if driven correctly)and quick shifting transmission. The modifications will give the same net increase with either transmission. The total numbers may be slightly lower with the AT although not by much. DEpointfive0 likes this. __________________ The Z is hers. I'm just the caretaker.

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