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Re: Power Shift my 4-speed?
[Re: SCATPK]
#493715
10/11/09 08:52 AM
10/11/09 08:52 AM
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Joined: Jan 2003
Posts: 4,084
Indiana
W5Duster436
master
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master
Joined: Jan 2003
Posts: 4,084
Indiana
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Before powershifting ensure that you have a rev limiter installed. I have had a few problems with my Hayes clutch recently and missed a few shifts but was thankful I had the limiter.  I am getting ready to put in a W5 engine into my duster and being able to powershift was imperative for me. I knew none of the single disc clutches would hold the power so I decided on a McCleod twin setup but was told that I wouldn't be able to powershift them so after calling McCleod I bought the original twin setup with their Borg/Beck Long style pressure plate setup which they said I could powershift.  You should pick up quite a bit but getting the 60ft down will probably put you in the low 11's easier.
'70 Duster - SDSS 436 W5 4spd (Gone)
'71 Dodge D100
'70 Dodge W100
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Re: Power Shift my 4-speed?
[Re: SCATPK]
#493716
10/11/09 08:54 AM
10/11/09 08:54 AM
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Joined: Nov 2003
Posts: 2,715
closer to Canadian beer!
torkrules
I'm neurotic
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I'm neurotic
Joined: Nov 2003
Posts: 2,715
closer to Canadian beer!
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Quote:
Took my gtx to the track last wednesday and was not very happy with the results. I do not take it down the track very often but when I do it just seems to have a terrible 60ft time usually around 1.840+. I always back off the throttle momentarily when I shift and think this is a major factor of why my 60 sucks and my ets have not improved. Do you think I will see any major difference if I flat foot the throttle and tap the clutch? My best the other night was 1.844 60 with an [Email]11.93@116.7.[/Email]
In my opinion (although I've never raced a 4 speed), I think it would make a huge difference, mind you it would not help your 60 foot times.
I suck at it so I don't try it, but just street driving, everytime I shift just driving normally, the car in the other line catches up until I got on the gas again. I can see that happening in a race if you let off the throttle before shifting.
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Re: Power Shift my 4-speed?
[Re: hemi_doug]
#493718
10/11/09 09:45 AM
10/11/09 09:45 AM
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Joined: Jan 2003
Posts: 27,421
Balt. Md
383man
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 27,421
Balt. Md
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Years ago I bracket raced a 340 Dart. When it got into the low 12's and high 11's the stock trans didn't always want to go right in gear when I power shifted as I would leave the gas pedal on the floor the whole run. So I started lifting the gas real fast as I shifted and you know it did not slow me down at all. I would bring the rpm's up to about 5000 when the lites came down and then floorboard it when I popped the clutch. It hooked good for 28 x 9 slicks. I dont know what the 60 was because I rolled it in 1982 and they were not giving the 60 ft times back then but the best et was 11.94 @ 113. Ron
Last edited by 383man; 10/11/09 09:46 AM.
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Re: Power Shift my 4-speed?
[Re: hemi_doug]
#493719
10/11/09 09:51 AM
10/11/09 09:51 AM
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Joined: Nov 2005
Posts: 15,118
85086
moparpollack
Lil Herman
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Lil Herman
Joined: Nov 2005
Posts: 15,118
85086
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Quote:
Quote:
Took my gtx to the track last wednesday and was not very happy with the results. I do not take it down the track very often but when I do it just seems to have a terrible 60ft time usually around 1.840+. I always back off the throttle momentarily when I shift and think this is a major factor of why my 60 sucks and my ets have not improved. Do you think I will see any major difference if I flat foot the throttle and tap the clutch? My best the other night was 1.844 60 with an [Email]11.93@116.7.[/Email]
My 60 ft times are just about the same....I don't know where or what I need to do to improve them...I have the car dead hooking off the line and still can't 60 below 1.9....when you figure it out let me know! Best I've done is 12.1 @ 116.
Ask Monte Smith about wheel speed a dead hook is not good for a launch. 
56 Plaza 63 D100 step side 67 Coronet, 68 Roadrunner, 69 Super Bees, 69 Coronet 500 convertible, 70 Roadrunner Post, 79 D150 360, and a severe case of Mopar a,d,d
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Re: Power Shift my 4-speed?
[Re: moparpollack]
#493720
10/11/09 10:44 AM
10/11/09 10:44 AM
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Joined: Oct 2004
Posts: 904
cleveland Ohio
mloboda
super stock
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super stock
Joined: Oct 2004
Posts: 904
cleveland Ohio
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Go to www.umtrnorth.com forums for any stick shift tech questions. Look under "tranny tech" and "clutch tech" sections of the forum. There are 1700 members willing to give great advice regarding any tranny, clutch set up.
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Re: Power Shift my 4-speed?
[Re: mloboda]
#493721
10/11/09 02:19 PM
10/11/09 02:19 PM
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Joined: Jan 2003
Posts: 6,570
San Francisco Ca
SCATPK
OP
master
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OP
master
Joined: Jan 2003
Posts: 6,570
San Francisco Ca
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I have had some say that I shift the car pretty fast even though I lift the throttle on every shift. I just got thru installing a street twin clutch in the car and it is a diaphragm style and it works great. At the track the other night I could feel the driveline bite on every shift. I do have a rev limiter [msd] and driveshaft loop and good ujoints so my parts are strong. My best 60ft has been by leaving the line at 3000rpm mabey I should rev it up a bit more? My car is not set up for racing but would like to get a bit closer to an 11.50 et if possible. I have 354 gears with 28" tall tires so I am sure my effective gear ratio is part of my problem and just that it is a heavy car. I am thinking I am going to practice a bit shifting it flat footed as I feel that should improve my performance. I would think not doing so is like a slow shifting automatic transmission? Here is my time slip anyone see anything by looking at the numbers?
Last edited by SCATPK; 10/11/09 02:32 PM.
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Re: Power Shift my 4-speed?
[Re: SCATPK]
#493722
10/11/09 02:49 PM
10/11/09 02:49 PM
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Joined: Dec 2004
Posts: 10,553
Rittman Ohio
fourgearsavoy
I Live Here
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I Live Here
Joined: Dec 2004
Posts: 10,553
Rittman Ohio
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Well you are aware of your 60'time woes,gearing has alot to do with that.If you are still running a 23 spline unit you may want to look into a 3.09 gear set for your trans.With your power level I think you can overcome the gear spread.When I had a 2.65 low and 3.55's I could only get a 1.68 short time.Now I have a 3.27 low and a 3.54 rear gear and I love that combo  Thats the great thing about a Richmond 5-speed,it's strong as a HEMI box but with an extra low gear As far as powershifting goes its just practice and perfect timing between your hand and foot.Some oldtimers(me included)try to keep the shifter close to the next direction instead of keeping it pushed up or pulled in the gear you are in. Gus 
64 Plymouth Savoy
493 Indy EZ's by Nick at Compu-Flow
5-Speed Richmond faceplate Liberty box
Dana 60
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Re: Power Shift my 4-speed?
[Re: fourgearsavoy]
#493723
10/11/09 03:03 PM
10/11/09 03:03 PM
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Joined: Jan 2003
Posts: 6,570
San Francisco Ca
SCATPK
OP
master
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OP
master
Joined: Jan 2003
Posts: 6,570
San Francisco Ca
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Quote:
Well you are aware of your 60'time woes,gearing has alot to do with that.If you are still running a 23 spline unit you may want to look into a 3.09 gear set for your trans.With your power level I think you can overcome the gear spread.When I had a 2.65 low and 3.55's I could only get a 1.68 short time.Now I have a 3.27 low and a 3.54 rear gear and I love that combo Thats the great thing about a Richmond 5-speed,it's strong as a HEMI box but with an extra low gear As far as powershifting goes its just practice and perfect timing between your hand and foot.Some oldtimers(me included)try to keep the shifter close to the next direction instead of keeping it pushed up or pulled in the gear you are in.
Gus
I am running the original trans that is a 18 spline unit. Getting my car moving from a dead stop with my gear and tire height is part of the problem. But it does make it a nice driver on the highway at 70mph.
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Post deleted by Defbob
[Re: moparpollack]
#493724
10/11/09 03:33 PM
10/11/09 03:33 PM
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Anonymous
Unregistered
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Anonymous
Unregistered
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Re: Power Shift my 4-speed?
#493725
10/11/09 06:58 PM
10/11/09 06:58 PM
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Joined: Jun 2009
Posts: 429
Sherman Texas
The Shocker
mopar
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mopar
Joined: Jun 2009
Posts: 429
Sherman Texas
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Before i got my Dart with the auto trans ,i raced a 4 spd car.Granted it was a low 13 second street car ,but i powershifted religiously and broke stuff constantly (clutches ,axles ,bearing straps in the rearend).I think its easier to just stick it on the floor than to let off and stick it again while shifting .I fine tuned everything for perfect operation( clutch linkage ,pedal hinge,shifter linkage ,etc.) and installed a rubber bump stop like was mentioned earlier under the clutch pedal on the floor ,and had only enough play to disengage the clutch enough to shift.Lots of fun ,but can be bad if you have weak components in the driveline.I never broke anything off the line ,it was always when i grabbed 2nd gear .As far as the ET's went it picked up a half a second or so powershifting and sure sounds cool...
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Re: Power Shift my 4-speed?
#493729
10/11/09 09:08 PM
10/11/09 09:08 PM
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Joined: Jan 2003
Posts: 25,200
Upper Midwest
MoparforLife
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 25,200
Upper Midwest
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Quote:
Quote:
Do you think I will see any major difference if I flat foot the throttle and tap the clutch?
for racing a seperation of only about .050 between the pressure plate and clutch disc is needed. anything more is wasted motion. a stop can be made by a simple piece of wood under the rug
 Back in the day when I was running a 4 gear I would lay the right on the boards and just tap the clutch pedal ennough to break the pressure enough to pull the gear. Been away for m it so long now I would be very hesitatent to try it again now. 
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Re: Power Shift my 4-speed?
[Re: SCATPK]
#493730
10/11/09 09:28 PM
10/11/09 09:28 PM
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Joined: Feb 2009
Posts: 182
NW of Indy
Thackdaddy
member
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member
Joined: Feb 2009
Posts: 182
NW of Indy
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Quote:
And it seems like opinions vary on what the lack of power shifting vs lifting a bit is doing to my actual et?
Well, in either case above you are not power shifting, once you push the clutch you loose the power part.
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Re: Power Shift my 4-speed?
[Re: Thackdaddy]
#493731
10/11/09 10:45 PM
10/11/09 10:45 PM
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Joined: Feb 2003
Posts: 10,208
Someplace you aren't
SomeCarGuy
I Live Here
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I Live Here
Joined: Feb 2003
Posts: 10,208
Someplace you aren't
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You can pick up some time by leaving your foot on the floor. The magazine guys run good numbers because they get prepped cars and don't care about having to fix broken stuff...
I want my fair share
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