auto versus manual on the dyno

02LaserRedGT · 05-21-2006, 06:08 PM

Previous 4r70w automatic trans with 4.10 gears setup

381rwhp/400rwtq

New t56 6-speed trans with 3.55 gears setup

final #s are 415rwhp/432rwtq

Pretty significant gain, eh? I'm thinking my auto had more than the supposed 20% drivetrain loss. It was pretty much done anyways. Tq converter was fried.

Teal_Beast · 05-21-2006, 06:55 PM

i hear gears can have something to do with it, and 3.55 vs 4.10s are a bit of a diffrence

GREG@SN95 · 05-21-2006, 07:12 PM

Quote:

Originally Posted by Teal_Beast

i hear gears can have something to do with it, and 3.55 vs 4.10s are a bit of a diffrence

yeh... thats a gear thing...

Blk02stang · 05-21-2006, 07:31 PM

I've seen the converter has alot to do with HP on the dyno. A TA came in and didnt put out the power he hoped, then changed hios torque converter and gained 20+ hp. Theres always gonna be a bit more HP loss on the Auto vs. a manual.

PureStang · 05-21-2006, 08:26 PM

4.10 gears should only loose between 5-10 hp....a very insignifigant number...

dannyb785 · 05-21-2006, 08:28 PM

does it FEEL faster?

whitethunder46 · 05-21-2006, 08:58 PM

Ok, gears will take some power, and maybe 5-10 HP in the engine. I saw NO MORE than 5RWHP. I'm gonna dyno mine before and after my gear install to see if there's a difference.

Tourque convertor can add up to 40-50RWHP (PI Staillion convertor), on our applications 20RWHP is a good number.

GREG@SN95 · 05-22-2006, 03:32 AM

yeh well... gears take power.... but in the head they make ya quicker... make it feel alot more torque...

Teal_Beast · 05-22-2006, 05:23 AM

yea i wasnt saying that gears are bad or anything, im just saying it could account for a few hp there.

02LaserRedGT · 05-22-2006, 07:41 AM

About 5-7hp came from the gears. Even without that, the hp gains are still quite large, greater than 5% increase.

However, my auto trans & tq convertor was busted so there's a possibility it wasn't putting down the power it should.

Blue02GT · 05-22-2006, 08:45 PM

A read somewhere recently that the actual drive train loss on a manual was about 12%. The supposed loss on an auto is 18-20%. Gears do cost a small loss (5-10). Torque convertors show no gain on the dyno but do make a significant difference at the track.

matrixpuba · 05-23-2006, 09:58 AM

look at thet TQ curve. i bet your car is a blast to drive!!!

02LaserRedGT · 05-23-2006, 08:37 PM

Quote:

Originally Posted by matrixpuba

look at thet TQ curve. i bet your car is a blast to drive!!!

As tempting as it is, I have yet to floor it. When I hit the 45,500 miles (trans and clutch beak in period/about 200 more to go), then it's on!

05-21-2006, 06:08 PM	#1 (permalink)
02LaserRedGT Senior Member Join Date: Apr 2006 Posts: 193	auto versus manual on the dyno Previous 4r70w automatic trans with 4.10 gears setup 381rwhp/400rwtq New t56 6-speed trans with 3.55 gears setup final #s are 415rwhp/432rwtq Pretty significant gain, eh? I'm thinking my auto had more than the supposed 20% drivetrain loss. It was pretty much done anyways. Tq converter was fried. __________________ 2002 Laser Red Mustang GT 653rwhp/612rwtq 2003 Redfire Metallic Cobra Convertible 401rwhp/383rwtq Cheaters Inc.

05-21-2006, 06:55 PM	#2 (permalink)
Teal_Beast V6 Power Join Date: Jun 2005 Location: Melbourne, FL Posts: 944	i hear gears can have something to do with it, and 3.55 vs 4.10s are a bit of a diffrence __________________ '94 v6 Mustang Custom twin turbo kit by Justin @ vmp Split port engine swap from a 2000 v6 mustang 388whp 435wtq Want to go fishing in the Florida Keys? http://www.rustyiv.com/

05-21-2006, 07:31 PM	#4 (permalink)
Blk02stang I 8urvtec!! Join Date: Mar 2005 Location: Va Posts: 815	I've seen the converter has alot to do with HP on the dyno. A TA came in and didnt put out the power he hoped, then changed hios torque converter and gained 20+ hp. Theres always gonna be a bit more HP loss on the Auto vs. a manual. __________________ New toys '07 F-150 black on black and completely blacked out! '96 Mitsu eclipse RS: 'jus your average 2nd gen with a small block 331c.i. and a few bolt-on goodies(175shot) and rwd...1st one to be done! SOLD 2004 GT Annv. edition. Custom Exhaust: o/r X pipe: Eibach Sportline full suspension: Clutchmasters stage 4 clutch: K&N filter: Steeda Tri-ax shifter: Mach 1 shift knob: BFG Drag radials: Compucar "nitrous-n-a-bag" 80-shot Stage I, Compucar Wet kit 125shot stage II

05-21-2006, 08:26 PM	#5 (permalink)
PureStang WE ARE PENNSTATE Join Date: Jul 2005 Location: Downingtown/West Chester, PA Posts: 4,734	4.10 gears should only loose between 5-10 hp....a very insignifigant number... __________________ Brandon J My Ride sig by purestang

05-21-2006, 08:58 PM	#7 (permalink)
whitethunder46 Always Detailin' Join Date: Oct 2005 Location: Dayton, OH Posts: 3,556	Ok, gears will take some power, and maybe 5-10 HP in the engine. I saw NO MORE than 5RWHP. I'm gonna dyno mine before and after my gear install to see if there's a difference. Tourque convertor can add up to 40-50RWHP (PI Staillion convertor), on our applications 20RWHP is a good number. __________________ supernissans.net 2001 Mustang GT - Saleen Replica - SOLD 2007 Nissan Sentra 2.0S http://www.cardomain.com/ride/3022272

05-21-2006, 08:28 PM	#6 (permalink)
dannyb785 Senior Member Join Date: Feb 2005 Posts: 3,176	does it FEEL faster?

05-22-2006, 03:32 AM	#8 (permalink)
GREG@SN95 Banned Join Date: May 2006 Location: JACKSON NJ Posts: 4,135	yeh well... gears take power.... but in the head they make ya quicker... make it feel alot more torque...

05-22-2006, 05:23 AM	#9 (permalink)
Teal_Beast V6 Power Join Date: Jun 2005 Location: Melbourne, FL Posts: 944	yea i wasnt saying that gears are bad or anything, im just saying it could account for a few hp there. __________________ '94 v6 Mustang Custom twin turbo kit by Justin @ vmp Split port engine swap from a 2000 v6 mustang 388whp 435wtq Want to go fishing in the Florida Keys? http://www.rustyiv.com/

05-22-2006, 07:41 AM	#10 (permalink)
02LaserRedGT Senior Member Join Date: Apr 2006 Posts: 193	About 5-7hp came from the gears. Even without that, the hp gains are still quite large, greater than 5% increase. However, my auto trans & tq convertor was busted so there's a possibility it wasn't putting down the power it should. __________________ 2002 Laser Red Mustang GT 653rwhp/612rwtq 2003 Redfire Metallic Cobra Convertible 401rwhp/383rwtq Cheaters Inc.

05-22-2006, 08:45 PM	#11 (permalink)
Blue02GT Ex Mini Smack King Join Date: Nov 2004 Location: St. Louis Posts: 868	A read somewhere recently that the actual drive train loss on a manual was about 12%. The supposed loss on an auto is 18-20%. Gears do cost a small loss (5-10). Torque convertors show no gain on the dyno but do make a significant difference at the track. __________________ True Blue 2002 GT Premium 4r70W 1/8 8.205@ 84.780 1/4 12.874@ 107.20 Bolt on's n/a NMRA #7703 Dyno'd at Modular Depot 251 hp. 291 Tq. 4.30's, 3500 Stall converter, Steeda upper & Lowers, Tokico drag struts, M & M frame connectors, P & A valve body, C&L plenum, Accufab 75mm TB, Jet Hot Long tubes, Hooker O/R X, Steeda catback,SCT tune,Steeda pullies.

05-23-2006, 09:58 AM	#12 (permalink)
matrixpuba Senior Member Join Date: Feb 2006 Location: tennessee Posts: 1,103	look at thet TQ curve. i bet your car is a blast to drive!!! __________________ pics->http://www.modularpowerhouse.com/for...?do=view&g=158 vid at idle->http://smg.photobucket.com/albums/v2...t=5ab47c14.flv

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