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Old 05-13-2012, 08:11 AM   #1
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Drag Racing - Tech Question

K started this one cause it wouldn't let me add to my old one for some reason. Ok question when I went to the strip the other day car ran good. I'm happy with my 2.0 60 ft and 14.9 et. @94 mph. With all stock engine no traction and messed up clutch. I say messed up I mean out adjustment. Next time goin with slicks and new steeda kit and cable. But anyway back to my question. When I cross the line at said 94 mph when I come off the gas and push in clutch and knock it in neutral my whole car gets a vibration till it gets down to about 70 or so. Now this dosnt happen on highway at 80 just at track. Is it normal. Just because goin all out and then slowing down quickly or should I check on something
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Old 05-13-2012, 08:52 AM   #2
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Re: Drag racing

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K started this one cause it wouldn't let me add to my old one for some reason. Ok question when I went to the strip the other day car ran good. I'm happy with my 2.0 60 ft and 14.9 et. @94 mph. With all stock engine no traction and messed up clutch. I say messed up I mean out adjustment. Next time goin with slicks and new steeda kit and cable. But anyway back to my question. When I cross the line at said 94 mph when I come off the gas and push in clutch and knock it in neutral my whole car gets a vibration till it gets down to about 70 or so. Now this dosnt happen on highway at 80 just at track. Is it normal. Just because goin all out and then slowing down quickly or should I check on something
Probably just the driveshaft oscillating a bit when going from power to coasting. The weight on the front of the third member that everyone removes helps prevent that from happening, but I don't think it is anything to worry about unless it becomes excessive. An aluminum driveshaft will probably prevent it from happening.
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Old 05-13-2012, 09:05 AM   #3
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3rd member ppl remove? What they remove? I've heard removing the antisway bar off the front for drag racing but that's it besides changing the k member

---------- Post added at 09:05 AM ---------- Previous post was at 09:05 AM ----------

Guess that's a good enough reason for a new aluminum driveshaft
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Old 05-13-2012, 09:22 AM   #4
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Re: Drag racing

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3rd member ppl remove? What they remove? I've heard removing the antisway bar off the front for drag racing but that's it besides changing the k member

---------- Post added at 09:05 AM ---------- Previous post was at 09:05 AM ----------

Guess that's a good enough reason for a new aluminum driveshaft
There is a weight (about 10-15 lbs I believe) on the cars from the factory that was bolted to the front of the third member or center section of the rear end. Most people remove them, so yours may be long gone already.
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Old 05-13-2012, 09:25 AM   #5
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Re: Drag racing

Moved.....
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Old 05-13-2012, 09:43 AM   #6
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That's what that big chunk of iron is. I didn't know what that was for but it's still there

---------- Post added at 09:43 AM ---------- Previous post was at 09:43 AM ----------

So I can take that off thought it was to support and make rearend stronger
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Old 05-13-2012, 10:19 AM   #7
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Re: Drag racing

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Moved.....
Why, it is a tech question not a drag racing discussion?
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Old 05-13-2012, 10:21 AM   #8
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That's what that big chunk of iron is. I didn't know what that was for but it's still there

---------- Post added at 09:43 AM ---------- Previous post was at 09:43 AM ----------

So I can take that off thought it was to support and make rearend stronger
It's supposed to help with harmonics in the drivetrain, but mine does not have it and I have noticed no adverse effects.
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Old 05-13-2012, 10:38 AM   #9
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Ok I might ditch it and see what happens
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Old 05-13-2012, 10:57 AM   #10
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Re: Drag racing

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Ok I might ditch it and see what happens
Give it a go and see how it does.
It never hurts to lose a bit of weight.
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Old 05-13-2012, 11:18 AM   #11
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Lol yea I could use all the help I can get in that department lol
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Old 05-13-2012, 11:53 AM   #12
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Lol yea I could use all the help I can get in that department lol
You and me both.
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Old 05-22-2012, 10:54 PM   #13
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Back to the strip I go tomorrow. Clutch quad kit installed. DS loop installed with et streets. And I dropped the weight off 3rd member.
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Old 05-22-2012, 11:18 PM   #14
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Re: Drag Racing - Tech Question

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Back to the strip I go tomorrow. Clutch quad kit installed. DS loop installed with et streets. And I dropped the weight off 3rd member.
Good luck & be safe!
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Old 05-23-2012, 06:21 AM   #15
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Always.
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Old 05-23-2012, 06:47 AM   #16
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Good luck man. I am anxious to see how much to et streets help. If you need help again making a vid, let me know.
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Old 05-23-2012, 06:59 AM   #17
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I would bet his 60' drops to a 1.7 or 1.8.. Heat them up good. I run 11 psi air pressure on mine down the track and they don't spin at all
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Old 05-23-2012, 07:45 AM   #18
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This time should be to bad cause imma make sure my phone stays charged. Last time the video was made on a friends phone
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Old 05-23-2012, 11:57 PM   #19
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Ok back from track. This time I had a best time of 14.008@ 97.12 mph with a 1.925 60ft. Launching at around 4000rpms with slicks. Picked up almost a full second off my time. Now if I can just get my 60ft down some more I'd be good but not gonna happen with bad synchros in 2nd and 3rd

---------- Post added at 11:57 PM ---------- Previous post was at 11:43 PM ----------

Check out this video on YouTube:




Sent from my iPhone
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Old 05-24-2012, 04:53 AM   #20
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Quote:
Originally Posted by captain78
Ok back from track. This time I had a best time of 14.008@ 97.12 mph with a 1.925 60ft. Launching at around 4000rpms with slicks. Picked up almost a full second off my time. Now if I can just get my 60ft down some more I'd be good but not gonna happen with bad synchros in 2nd and 3rd

---------- Post added at 11:57 PM ---------- Previous post was at 11:43 PM ----------

Check out this video on YouTube:



Sent from my iPhone
Nice cap. That's a good time with bad syncros and stock motor.
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Old 05-24-2012, 06:47 AM   #21
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Yea I'm thinking new tranny or at least a good one and I'd be in the 13s
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Old 05-24-2012, 09:40 AM   #22
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Re: Drag Racing - Tech Question

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Ok back from track. This time I had a best time of 14.008@ 97.12 mph with a 1.925 60ft. Launching at around 4000rpms with slicks. Picked up almost a full second off my time. Now if I can just get my 60ft down some more I'd be good but not gonna happen with bad synchros in 2nd and 3rd

Check out this video on YouTube:



Sent from my iPhone
Nice run, looked like you may have gotten a pretty good light.


As far as lowering the 60 foot times, if they will let you, you can deep stage.
After both top bulbs are lit, you roll forward until the very top bulb goes out.
That gives you a "run" at the 60 ft time, but of course it won't help your true 60 ft times.
For that you need more power and good traction.
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Old 05-24-2012, 11:43 AM   #23
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And a tranny that I can get into the gears without grinding
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Old 05-24-2012, 12:13 PM   #24
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Re: Drag Racing - Tech Question

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And a tranny that I can get into the gears without grinding
Have you considered a rebuild or are you going for a stronger transmission?
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Old 05-24-2012, 04:20 PM   #25
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I have a tremec T5 sitting in the shop ready to go. Just gotta put it in lol. When I buy one imma get a TKO600
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Old 05-24-2012, 04:45 PM   #26
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I have a tremec T5 sitting in the shop ready to go. Just gotta put it in lol. When I buy one imma get a TKO600
well what are you waiting on! lol
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Old 05-24-2012, 05:55 PM   #27
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Lol time.
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Old 05-24-2012, 06:40 PM   #28
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Re: Drag Racing - Tech Question

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I have a tremec T5 sitting in the shop ready to go. Just gotta put it in lol. When I buy one imma get a TKO600
I had planned on a TKO600, but if my engine makes the power I think it will and not self destruct I may have to rethink that choice.
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Old 05-24-2012, 06:41 PM   #29
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Just got around to watching the vid..its nice to actually see your 2 vids and how much fixing your traction issues helped!...almost in the 13's stock!...very nice
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Old 05-24-2012, 06:46 PM   #30
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I was trying to get there lol. So you don't think the tko600 gonna hold up to your eng.
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Old 05-24-2012, 07:02 PM   #31
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Re: Drag Racing - Tech Question

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I was trying to get there lol. So you don't think the tko600 gonna hold up to your eng.
Not sure, I'm shooting for 600+ HP with this engine and eventually I'm going to a Boss 351W block, 408 or 427 stroker and mirrored turbos, so............


I want to end up with the baddest, fastest street driven Mustang this area has ever seen if I ever heal up enough and live long enough to get it done. Dreams, I haz them.
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Old 05-24-2012, 07:16 PM   #32
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Lol I know what you mean.
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Old 05-24-2012, 07:49 PM   #33
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Not sure, I'm shooting for 600+ HP with this engine and eventually I'm going to a Boss 351W block, 408 or 427 stroker and mirrored turbos, so............

I want to end up with the baddest, fastest street driven Mustang this area has ever seen if I ever heal up enough and live long enough to get it done. Dreams, I haz them.
^im looking forward to this^
What kind of trans you thinkin?..ive always been a big fan of the 4spd jerico's!...

---------- Post added at 07:49 PM ---------- Previous post was at 07:39 PM ----------

And liberty transmissions too!.
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Old 05-24-2012, 07:59 PM   #34
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I'd like to know that as well because I want a tranny that's gonna hold 600-700 hspr hoping to stick with the stick
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Old 05-24-2012, 08:51 PM   #35
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Re: Drag Racing - Tech Question

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^im looking forward to this^
What kind of trans you thinkin?..ive always been a big fan of the 4spd jerico's!...

---------- Post added at 07:49 PM ---------- Previous post was at 07:39 PM ----------

And liberty transmissions too!.
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I'd like to know that as well because I want a tranny that's gonna hold 600-700 hspr hoping to stick with the stick
Looking at Jerico, Liberty & G-Force. (I love the whine of straight cut gears too.)
It will come down to who can offer the most transmission for the least money

Plus, I want to keep the OD gear, so I may go with a 6 speed if possible.
That way I can configure the first 5 to keep the engine in its power band and still get some street mileage benefits.
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