Fast Intentions Long Tube Headers are here!

wstar · 05-23-2011, 03:12 PM

Quote:

Originally Posted by XwChriswX

Then how are other people managing to do their dyno's in the correct gear and still hitting redline? No tunes...??

The 6MT guys have no problem doing a dyno in 5th, and that's the right gear for them. The limitations I'm talking about are with the 7AT. 7AT has a rear diff ratio of 3.357:1 whereas the 6MT has 3.692:1, which is why they have different speed ranges in 5th even though 5th is "1.0" on both transmissions.

You can remove the speed limiter with UpRev, etc to get around it, or just dyno in 4th. FWIW, on Dyno Dynamics we pulled in 3/4/5 on my 7AT in the past and didn't see any significant difference (up to the limit in 5 anyways). Some dynos are more susceptible to gearing difference than others, depends on the measuring methodology I think.

F.I. Inc. · 05-31-2011, 04:46 PM

Quote:

Originally Posted by wstar

The 6MT guys have no problem doing a dyno in 5th, and that's the right gear for them. The limitations I'm talking about are with the 7AT. 7AT has a rear diff ratio of 3.357:1 whereas the 6MT has 3.692:1, which is why they have different speed ranges in 5th even though 5th is "1.0" on both transmissions.

You can remove the speed limiter with UpRev, etc to get around it, or just dyno in 4th. FWIW, on Dyno Dynamics we pulled in 3/4/5 on my 7AT in the past and didn't see any significant difference (up to the limit in 5 anyways). Some dynos are more susceptible to gearing difference than others, depends on the measuring methodology I think.

Interesting input.

You can dyno the automatic in a gear that is lower than 5th or not a 1:1 ratio. However your peak numbers will be lower. Now if you were just looking for comparison numbers, you could do the baseline in 4th and just do the later dyno is the same gear.

Tony

XwChriswX · 05-31-2011, 04:48 PM

I want a rear diff swap then!

Gardus350z · 06-10-2011, 04:22 AM

The EU market 370z cannot hit the rev limiter in 5th gear, it hits the speed limiter so it doesn't get full power as it still hase around 300 rpm to go. I'm not sure about the US version, but I think the 6M has the same gear ratio, maybe it's the speed limiter that is different?

F.I. Inc. · 06-21-2011, 12:18 AM

UPDATE-

David T. (Non forum member): 058, Elitle Auto Service: 059, MTAxelson: 060

Thank you ALL for your recent orders!

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The Dreamer: 006 (Installed)
LeonZ5: 007 (Installed)
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MTAxelson: 060

wstar · 06-21-2011, 12:32 AM

woot, #52, finally on its way to me.

mtaxelson · 06-22-2011, 12:30 PM

woot, #60, have a long wait ahead of me. well worth it though.

05-31-2011, 04:48 PM	#3 (permalink)
XwChriswX WFLYIDNNE Join Date: Jul 2009 Location: In The Fastlane Posts: 50,648 Drives: 02 GDB WRX Rep Power: 454	I want a rear diff swap then! __________________ Bonnie - Stage 2, Audio build coming this fall! R.I.P. Abby 3/29/10 - 3/30/14

06-21-2011, 12:18 AM	#5 (permalink)
F.I. Inc. The370Z.com Sponsor Join Date: Feb 2009 Location: Simi Valley, CA Posts: 2,989 Drives: 2010 GT-R/2007 F-250 Rep Power: 687	*UPDATE-* David T. (Non forum member): 058, Elitle Auto Service: 059, MTAxelson: 060 Thank you ALL for your recent orders! HNGonzalez: 001 (Installed) Semtex: 002 (Installed) Daishi: 003 (Installed) Mr. Anonymous: 004 (Installed) Kolya: 005 (Installed) The Dreamer: 006 (Installed) LeonZ5: 007 (Installed) Earwicker7: 008 (Installed) Zello370: 009 (Installed) Matrix_Square: 010 (Installed) Dainedazz: 011 (Installed) Cotizi: 012 (Installed) Jason S. (Non forum member): 013 (Installed) NYBladez: 014 (Installed) Valentino: 015 (Installed) res0zsfa: 016 (Installed) Danny3.7: 017 (Installed) Tardcore: 018 (Installed) Booger: 019 (Installed) PG6speed: 020 (Installed) Jnaut: 021 (Installed) Shultea1: 022 (Installed) VH370ZNISMO: 023 (Installed) Vipor: 024 (Installed) E.Johnson: 025 (Installed) Jamaica951: 026 (Canceled) Bejan: 027 (Installed) roplusbee: 028 (On hold, waiting for customer) Vegitto-Kun: 029 (Installed) jgb0311: 030 (Installed) xwchriswx: 031 (Installed) WesEngines: 032 (Delivered) VA370Z: 033 (Installed) Rooskey: 034 (Delivered) Hassan A. (Non forum member): 035 (Delivered) Fleece82: 036 (Installed) AndrewKD16: 037 (Installed) Pato C. (Non forum member): (Installed) Rickey89: 039 (Delivered) Reaper42: 040 (Delivered) FL 4motion/Juno: 041 (Delivered) One_Quick_Z: 042 (Delivered) Ivo S. (Non forum member): 043 (Installed) NewYorkJon34: 044 (Installed) Jespir1: 045 (Delivered) leighspped: 046 (Delivered) AndrewC_31: 047 (Installed) KPyburn: 048 (Delivered) Ryanboy: 049 (Delivered) Nismodean: 050 (Delivered) NissanBoy: 051 (Delivered) Blblack: 052 (Delivered) Cambinese: 053 (Delivered) german77: 054 (Delivered) Peppers: 055 Nism0370: 056 PCB370Z: 057 David T. (Non forum member): 058 Elitle Auto Service: 059 MTAxelson: 060 __________________ *Follow us on Facebook: Fast Intentions Inc.* Phone: (805) 522-FAST (3278) Email: tony@fastintentions.com www.fastintentions.com "FUELED BY PASSION" Last edited by F.I. Inc.; 07-18-2011 at 12:04 PM.

06-21-2011, 12:32 AM	#6 (permalink)
wstar A True Z Fanatic Join Date: Mar 2009 Location: Houston, TX Posts: 4,024 Drives: too slow Rep Power: 3596	woot, #52, finally on its way to me. __________________ 7AT Track Car! Journal thread / Car setup details

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06-10-2011, 04:22 AM	#4 (permalink)
Gardus350z Base Member Join Date: Jun 2011 Location: Brescia - Italy Posts: 32 Drives: 04 Nissan 350Z L2 M6 Rep Power: 16	The EU market 370z cannot hit the rev limiter in 5th gear, it hits the speed limiter so it doesn't get full power as it still hase around 300 rpm to go. I'm not sure about the US version, but I think the 6M has the same gear ratio, maybe it's the speed limiter that is different?

06-22-2011, 12:30 PM	#7 (permalink)
mtaxelson Enthusiast Member Join Date: Feb 2011 Location: New Jersey Posts: 311 Drives: "Two Brake Pedals" Rep Power: 16	woot, #60, have a long wait ahead of me. well worth it though.