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Author
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Topic: loss of Dyno HP with 4:30 gears???
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03SVTPower
CAFords OG
Member # 518
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posted
 
 
Know this "guy" who wants to get some 4:30's put in his 99+ GT, I told him to dyno the car with the stock gears first. I have heard that when you put gears in your car, like 4:30's, dyno numbers may drop slightly, any truth to this, or do i have no idea what the hell im talking about.... Learn me something ![[Confused]](confused.gif)
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2003 Redfire "AED" Cobra R.I.P
Posts: 3481 | From: Nor-Cal | Registered: Oct 2001
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SmokinLX
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Member # 1684
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posted
Take it to the track first too,dynos can lie to you but the track wont. ![[burnout]](graemlins/burnout.gif)
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Dont claim power if ya cant mile per hour. 10 second AOD
Posts: 4388 | From: East Bay | Registered: Aug 2002
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03SVTPower
CAFords OG
Member # 518
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posted
quote:
Originally posted by SmokinLX:
Take it to the track first too,dynos can lie to you but the track wont.
He'd probably be slower due to all the shifting...lol
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2003 Redfire "AED" Cobra R.I.P
Posts: 3481 | From: Nor-Cal | Registered: Oct 2001
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Hungry Hippo
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Member # 537
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posted
i think it would lower his dyno numbers cause dynoing in 3rd gear gives you lower numbers than 4th
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05 S4 Avant(wagon)
09 C6 H/C/I
Posts: 2959 | From: east bay | Registered: Nov 2001
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TRIXSNK
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Member # 2844
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posted
Just like anything else it would be due to increase friction of the teeth on the gears that would eat up any noticable "wheel" HP
Just like having an auto ![[Frown]](frown.gif) ![[Smile]](smile.gif)
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9 Sec EVO 9 is GONE!
New project in the works.......
Posts: 3740 | From: Bay Area | Registered: May 2003
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twisted54
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Member # 1981
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posted
quote:
Originally posted by HungryHippo:
i think it would lower his dyno numbers cause dynoing in 3rd gear gives you lower numbers than 4th
My dyno numbers were always really crappy in 3rd with the aode...
Track #s were much better... ![[Big Grin]](biggrin.gif)
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2013 Black on Black 5.0 with Boost N Things - CORN FED 🌽
Posts: 3421 | From: ebay | Registered: Oct 2002
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Mach0ne351
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Member # 927
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posted
higher gears will throw the dyno #'s off.......they wont take HP away, theyll just throw the dyno off....
marek
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2001 SVT Cobra
SCT Tuned by APEX Motorsports @ 317rwhp/304rwtq
www.32valve.com
Posts: 1182 | From: Marina, CA | Registered: Feb 2002
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bunchmyfunky
CAFords Drag Racing Mod
Member # 360
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posted
quote:
Originally posted by Mach0ne351:
higher gears will throw the dyno #'s off.......they wont take HP away, theyll just throw the dyno off....
marek
That makes no sense. HP is calculated based on TQ, Dyno's calculate in TQ so explain how can gears throw off the dyno but not HP.
All gears do is allow you to get thru your rpms faster it doesnt affect TQ or HP.
[ June 23, 2005, 03:53 PM: Message edited by: bunchmyfunky ]
Posts: 2433 | From: Vacaville | Registered: Jul 2001
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jaybquick
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Member # 4286
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posted
I have done dyno pulls in 3rd and 4th on the same day. Due to the increased load of the higher 4th gear, the dyno pulls were about 5 to 10hp higher. Like everyone else said, just take it to the track.
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91 Mustang GT ET: 11.92@115
66 Mustang ET: 11.43@119
01 Audi S4 ET: 10.8@131
05 Audi S4 ET: 11.9@116
08 Audi S5 ET: 11.9@118
Posts: 416 | From: Lathrop | Registered: Mar 2004
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sic70stang
CAFords OG
Member # 4347
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posted
dyno should be done in direct drive with is 4th on a 5 speed or 6 speed and 3rd in your AOD. gears do effect TQ. dynoing in direct drive finds your hp and TQ without gear reduction taking place. very complicated to me. if u dyno in overdrive you should see less TQ. and lets face it TQ is what matters here.
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The anti-crew
1987 rolling safety violation.
Posts: 6940 | From: California | Registered: Jul 2005
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Mach0ne351
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Member # 927
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posted
i dunno why that is, but it is.....sux
marek
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2001 SVT Cobra
SCT Tuned by APEX Motorsports @ 317rwhp/304rwtq
www.32valve.com
Posts: 1182 | From: Marina, CA | Registered: Feb 2002
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91 5.0
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Member # 1527
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posted
quote:
Originally posted by sic5pointSLOW:
dyno should be done in direct drive with is 4th on a 5 speed or 6 speed and 3rd in your AOD. gears do effect TQ. dynoing in direct drive finds your hp and TQ without gear reduction taking place. very complicated to me. if u dyno in overdrive you should see less TQ. and lets face it TQ is what matters here.
![[patriot]](graemlins/patriot.gif)
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02 GT - Zinc Yellow
91 5.0 LX - Red
Posts: 1316 | From: Fairfield | Registered: Jul 2002
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