Drag Racing - Tech Question

[captain78]

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

[Trojan Horse]

Originally Posted by captain78

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.

[captain78]

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

[Trojan Horse]

Originally Posted by captain78

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.

[DDTCM]

Moved.....

[captain78]

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

[Trojan Horse]

Originally Posted by DDTCM

Moved.....

Why, it is a tech question not a drag racing discussion?

[Trojan Horse]

Originally Posted by captain78

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.

[captain78]

Ok I might ditch it and see what happens

[Trojan Horse]

Originally Posted by captain78

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.

[captain78]

Lol yea I could use all the help I can get in that department lol

[Trojan Horse]

Originally Posted by captain78

Lol yea I could use all the help I can get in that department lol

You and me both.

[captain78]

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.

[Trojan Horse]

Originally Posted by captain78

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!

[captain78]

Always.

[dreamstang]

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.

[90GTNovi2000]

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

[captain78]

This time should be to bad cause imma make sure my phone stays charged. Last time the video was made on a friends phone

[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:

http://www.youtube.com/watch?v=-qVIk...e_gdata_player


Sent from my iPhone

[dreamstang]

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:

http://www.youtube.com/watch?v=-qVIk...e_gdata_player

Sent from my iPhone

Nice cap. That's a good time with bad syncros and stock motor.

[captain78]

Yea I'm thinking new tranny or at least a good one and I'd be in the 13s

[Trojan Horse]

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

Check out this video on YouTube:

14sec quarter 1990 GT - 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.

[captain78]

And a tranny that I can get into the gears without grinding

[Trojan Horse]

Originally Posted by captain78

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?

[captain78]

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

[dreamstang]

Originally Posted by captain78

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

[captain78]

Lol time.

[Trojan Horse]

Originally Posted by captain78

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.

[XXSTEVEO66]

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

[captain78]

I was trying to get there lol. So you don't think the tko600 gonna hold up to your eng.

[Trojan Horse]

Originally Posted by captain78

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.

[captain78]

Lol I know what you mean.

[XXSTEVEO66]

Originally Posted by Trojan Horse

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!.

[captain78]

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

[Trojan Horse]

Originally Posted by XXSTEVEO66

^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!.

Originally Posted by captain78

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.