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Author Topic: C4 converter stall  (Read 291 times)
trickcat
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« on: February 22, 2009, 11:22:13 am »
I finally got to take the Cougar out yesterday  The transmission was "Fixed" after I had it rebuilt.
It pulls harder now then before so I finally got to check the stall speed on the converter. From what I remember by putting it in 3rd gear and hammering it will give you your stall speed? I hammered it, hit 4300 rpm and went sideways Grin Grin Grin so is that the right way to check it? 
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68 Cougar, 418 stroker, CI cam, Canfield heads, 1000cfm Drag Race Demon, C4/w 4000 stall, 9" rear, Detroit locker and bald tires. Explain


http://videos.streetfire.net/video/My-68-Cougar-at-Raceway_209039.htm

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Whitey
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« Reply #1 on: February 23, 2009, 10:51:16 am »
3rd gear rolling about 10mph and nail the throttle wide open is the way I do it... It probable want change the stall speed much.   Do you have a trans brake?
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eckertd
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« Reply #2 on: February 23, 2009, 10:59:44 am »
Quote from: trickcat on February 22, 2009, 11:22:13 am
I finally got to take the Cougar out yesterday  The transmission was "Fixed" after I had it rebuilt.
It pulls harder now then before so I finally got to check the stall speed on the converter. From what I remember by putting it in 3rd gear and hammering it will give you your stall speed? I hammered it, hit 4300 rpm and went sideways Grin Grin Grin so is that the right way to check it? 

Judging by those grins, it was the right way...LOL!
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1967 Mustang Hardtop
347, C4, 3.50, 13.5sec @104.5mph

Quote from: 347HO on June 16, 2008, 11:24:51 pm
I can't stand "backpressure"...  it's like holding in a fart.
trickcat
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« Reply #3 on: February 23, 2009, 12:24:35 pm »
Quote from: Whitey on February 23, 2009, 10:51:16 am
3rd gear rolling about 10mph and nail the throttle wide open is the way I do it... It probable want change the stall speed much.   Do you have a trans brake?

Nope, no brake.
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68 Cougar, 418 stroker, CI cam, Canfield heads, 1000cfm Drag Race Demon, C4/w 4000 stall, 9" rear, Detroit locker and bald tires. Explain


http://videos.streetfire.net/video/My-68-Cougar-at-Raceway_209039.htm

"Fast cars only need 2 pedals.... A Go Pedal and a Whoa pedal!"
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« Reply #4 on: February 23, 2009, 02:13:45 pm »
Ok! Sounds like the thing is working like it is suppose to .... Has a lot of torque! Is it the same or a new converter?
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trickcat
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« Reply #5 on: February 23, 2009, 02:42:49 pm »
Same converter, I had the transmission rebuilt but it had issues Disgust It would shift at 10,15 and 20 mph by it's self WTF I paid for a select shift valve body. They did not adjust the modulator correctly, once they adjusted the modulator it's a whole different animal Naughty
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68 Cougar, 418 stroker, CI cam, Canfield heads, 1000cfm Drag Race Demon, C4/w 4000 stall, 9" rear, Detroit locker and bald tires. Explain


http://videos.streetfire.net/video/My-68-Cougar-at-Raceway_209039.htm

"Fast cars only need 2 pedals.... A Go Pedal and a Whoa pedal!"
69 Merc
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« Reply #6 on: February 23, 2009, 03:25:49 pm »
Are you saying that you have a manual VB?  That is the only way . . .
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Robert's 1969 Mercury Montego MX is a 3750LB daily driven (75MI/WK) 9.5" SBF 363W (+.060" over), 9.5:1CR, RPM 2.02", Comp XE-274HFT, RPM Air-Gap, 1" four-hole + 2" open phenolic spacers, Holley HP VAC 750CFM carb, 34* @ 1800RPM total timing, Accufab 1-3/4" x 3" LT headers, manual VB C4, 10" - 3500 stall TC, 4.56 geared 9", Detroit TrueTrac Locker, 31 spline axles, sub-frame connectors, driveshaft safety-loop, 3/8" welded chain torque strap, custom leaf spring suspension, traction bars.

Hopefully soon in 2010 Jim "Woody" Woods and Jay Allen will be helping me build a scary fast Southern Californian street daily driven SBF 445" motor with -- Jim's FordStrokers' prepped Dart SHP iron block @ 4.155" bore x 4.1" stroke, all forged bottom-end, internally balanced, Super Vic intake, combined with Jay's Camshaft Innovations' custom billet TLSR camshaft, Comp #838 lifters, 10.xx:1CR, TW TEA CNC 205 heads, 7/16" Comp Ultra-Gold rockers and a Pro Systems custom 4150 carb.
trickcat
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« Reply #7 on: February 23, 2009, 03:45:05 pm »
nope...The VB I got you can put it in 1st or 2nd and it won't shift out of that gear, you put it in Drive and its all 3 gears. It would stay in first ok, in 2nd it would shift from 1-2 at 4200rpm if I had it floored or about 10mph just driving. In drive it would shift at 10,15 and 20mph diving normal. Now I can shift at 6800 rpm 1-2 and 2-3 it dropped my 60' time by 6/10ths.
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68 Cougar, 418 stroker, CI cam, Canfield heads, 1000cfm Drag Race Demon, C4/w 4000 stall, 9" rear, Detroit locker and bald tires. Explain


http://videos.streetfire.net/video/My-68-Cougar-at-Raceway_209039.htm

"Fast cars only need 2 pedals.... A Go Pedal and a Whoa pedal!"
69 Merc
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« Reply #8 on: February 23, 2009, 06:13:58 pm »
Quote from: trickcat on February 23, 2009, 03:45:05 pm
nope...The VB I got you can put it in 1st or 2nd and it won't shift out of that gear, you put it in Drive and its all 3 gears. It would stay in first ok, in 2nd it would shift from 1-2 at 4200rpm if I had it floored or about 10mph just driving. In drive it would shift at 10,15 and 20mph diving normal. Now I can shift at 6800 rpm 1-2 and 2-3 it dropped my 60' time by 6/10ths.
To truly measure flash stall speed on an automatic TC you need to be able to have it in 3rd gear - (your 1:1 ratio trans gear) - and for it to stay in 3rd gear the entire time when you punch the gas pedal while cruising at a low MPH speed.  Not for it to downshift itself into a lower gear . . .
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Robert's 1969 Mercury Montego MX is a 3750LB daily driven (75MI/WK) 9.5" SBF 363W (+.060" over), 9.5:1CR, RPM 2.02", Comp XE-274HFT, RPM Air-Gap, 1" four-hole + 2" open phenolic spacers, Holley HP VAC 750CFM carb, 34* @ 1800RPM total timing, Accufab 1-3/4" x 3" LT headers, manual VB C4, 10" - 3500 stall TC, 4.56 geared 9", Detroit TrueTrac Locker, 31 spline axles, sub-frame connectors, driveshaft safety-loop, 3/8" welded chain torque strap, custom leaf spring suspension, traction bars.

Hopefully soon in 2010 Jim "Woody" Woods and Jay Allen will be helping me build a scary fast Southern Californian street daily driven SBF 445" motor with -- Jim's FordStrokers' prepped Dart SHP iron block @ 4.155" bore x 4.1" stroke, all forged bottom-end, internally balanced, Super Vic intake, combined with Jay's Camshaft Innovations' custom billet TLSR camshaft, Comp #838 lifters, 10.xx:1CR, TW TEA CNC 205 heads, 7/16" Comp Ultra-Gold rockers and a Pro Systems custom 4150 carb.
69 Merc
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« Reply #9 on: February 23, 2009, 06:27:38 pm »
Just saying it like it is, bro.  I am not trying to take any of your happiness away though - if it pulls harder then before then that is a cause for celebration!  By the way - I'm saving for a big block packaged in a SBF like you have right now . . . 
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Robert's 1969 Mercury Montego MX is a 3750LB daily driven (75MI/WK) 9.5" SBF 363W (+.060" over), 9.5:1CR, RPM 2.02", Comp XE-274HFT, RPM Air-Gap, 1" four-hole + 2" open phenolic spacers, Holley HP VAC 750CFM carb, 34* @ 1800RPM total timing, Accufab 1-3/4" x 3" LT headers, manual VB C4, 10" - 3500 stall TC, 4.56 geared 9", Detroit TrueTrac Locker, 31 spline axles, sub-frame connectors, driveshaft safety-loop, 3/8" welded chain torque strap, custom leaf spring suspension, traction bars.

Hopefully soon in 2010 Jim "Woody" Woods and Jay Allen will be helping me build a scary fast Southern Californian street daily driven SBF 445" motor with -- Jim's FordStrokers' prepped Dart SHP iron block @ 4.155" bore x 4.1" stroke, all forged bottom-end, internally balanced, Super Vic intake, combined with Jay's Camshaft Innovations' custom billet TLSR camshaft, Comp #838 lifters, 10.xx:1CR, TW TEA CNC 205 heads, 7/16" Comp Ultra-Gold rockers and a Pro Systems custom 4150 carb.
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