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  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-

C4 vs. C6

  • Thread starter Thread starter 7upstang91
  • Start date Start date Sep 9, 2009

7upstang91

10 Year Member
May 30, 2008
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Florida
Sep 9, 2009
#1
  • Sep 9, 2009
  • #1
I have heard that the C6 can handle more power. But also loses 60rwhp over the C4. Not an automatic guy but my step-brother has a C6 and we wanted to know. The car came with it.
 

tannerc91gt

This last 25% is foreign territory at this point
Founding Member
Nov 29, 1999
4,392
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Indiana
Sep 9, 2009
#2
  • Sep 9, 2009
  • #2
Power loss through drivetrain Is percentage based, the c6 tranny is a more stout built trans but im not sure where your getting the 60hp loss info from
 

faststang90

10 Year Member
Nov 5, 2007
522
16
49
baytown texas
Sep 9, 2009
#3
  • Sep 9, 2009
  • #3
yeah i think 60 hp is to hi over the c4 power loss. i was told before that a glide is 18% loss and a 3 speed tranny is about a little more and a aod tranny is 27% loss.
 

Darkwriter77

Resident Ranting Negative Nancy
5 Year Member
Jul 1, 2005
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Apache Junction, AZ
Sep 9, 2009
#4
  • Sep 9, 2009
  • #4
faststang90 said:
yeah i think 60 hp is to hi over the c4 power loss. i was told before that a glide is 18% loss and a 3 speed tranny is about a little more and a aod tranny is 27% loss.
Click to expand...

Damn ... if that's true, then that means my '84 only has about ... 110.5 RWHP.
 

white 89 GT

Member
Apr 3, 2003
281
0
17
Tacoma
Sep 10, 2009
#5
  • Sep 10, 2009
  • #5
faststang90 said:
yeah i think 60 hp is to hi over the c4 power loss. i was told before that a glide is 18% loss and a 3 speed tranny is about a little more and a aod tranny is 27% loss.
Click to expand...

Yeah my aod must be killing me, time for a C4. 27% thats a bunch what could I do with that extra 8-10%
 

bentley429isBAC

10 Year Member
Jul 23, 2009
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CT
Sep 10, 2009
#6
  • Sep 10, 2009
  • #6
C4's suck.
 

90lxcoupe

20+ Year Stangneter
Oct 7, 2003
3,596
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Sep 11, 2009
#7
  • Sep 11, 2009
  • #7
27% seems awful high, whered that number come from?
 

white 89 GT

Member
Apr 3, 2003
281
0
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Tacoma
Sep 11, 2009
#8
  • Sep 11, 2009
  • #8
I think 27% is high for a fully rollerized trans, but the AOD does suck up much more hp than most autos.
I don`t think c4`s suck, I think built correctly they perform very well.
 

tannerc91gt

This last 25% is foreign territory at this point
Founding Member
Nov 29, 1999
4,392
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Sep 11, 2009
#9
  • Sep 11, 2009
  • #9
15%-20% seems to be about the generally accepted amount of loss
 

Darkwriter77

Resident Ranting Negative Nancy
5 Year Member
Jul 1, 2005
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Apache Junction, AZ
Sep 11, 2009
#10
  • Sep 11, 2009
  • #10
Well, if a stock '87-'93 5.0 is rated at 225 HP at the flywheel, what are most folks showing for RWHP on a dyno with an AOD car? (I seem to remember around 190 HP being the norm for stock setup Foxes, but I think those were mostly on T-5 cars... )
 

faststang90

10 Year Member
Nov 5, 2007
522
16
49
baytown texas
Sep 11, 2009
#11
  • Sep 11, 2009
  • #11
i dont remember where i got told that. i want to say it was from j&w.
 

bentley429isBAC

10 Year Member
Jul 23, 2009
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CT
Sep 11, 2009
#12
  • Sep 11, 2009
  • #12
white 89 GT said:
I think 27% is high for a fully rollerized trans, but the AOD does suck up much more hp than most autos.
I don`t think c4`s suck, I think built correctly they perform very well.
Click to expand...

They sure do perform great. Then they break all the time. Anyways what are you doing with the trans whats in front of it, and do you want a brake?
 

white 89 GT

Member
Apr 3, 2003
281
0
17
Tacoma
Sep 11, 2009
#13
  • Sep 11, 2009
  • #13
bentley429isBAC said:
They sure do perform great. Then they break all the time. Anyways what are you doing with the trans whats in front of it, and do you want a brake?
Click to expand...

If built right it will last, some upgrades are a must like the #9 bearing needs to be converted to roller and I want to use the broader trans 2.92 first gear planet.
No brake for me, I just foot brake it @ 1500 rpm and stab it. As for the AOD thats in my car now a buddy in texas wants it.
 

7upstang91

10 Year Member
May 30, 2008
936
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Florida
Sep 13, 2009
#14
  • Sep 13, 2009
  • #14
So the C6 is better than the C4?
 

bentley429isBAC

10 Year Member
Jul 23, 2009
922
188
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CT
Sep 13, 2009
#15
  • Sep 13, 2009
  • #15
YES. Put a TH400 in it.
 

ChromdOutDubs

Member
Sep 1, 2005
268
1
18
Tavares, Florida
Sep 16, 2009
#16
  • Sep 16, 2009
  • #16
7upstang91 said:
So the C6 is better than the C4?
Click to expand...

I hated my C6, fully built with a custom Brake from JW. Broke it three times in a row, three different parts... I end up spending big money on my Mighty Mite C4 from Dynamic and haven't had a problem with their C4. Iv heard that the C6 pulls about 5-8% more drive train loss than the C4. After swapping from the C6 to the C4 it seemed like the C6 weighed 30lbs. more too.

Just my 2 cents...

-AJ
 
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