Want to run the MM in the 1/4 soon. Need advice

[JBeezy]

Soo, I plan on running my car soon just to see what it will run in the 1/4. I'm use to running stick cars so this auto deal is new to me.

The main question is, how should I launch it. Should I just floor it off idle or raise the rpm's some? I did try this when it was stock and it didn't like the rpm's being raised before takeoff. Felt like it took off in 2nd.

Keep in mind it has the stock converter. Thanks in advance

[Nightcrawler]

On my built car, I always get on the converter a bit,just enough that it wont overpower the road depending on conditions. On my stock mm, I usually preload the converter to 1200 or so. A converter would benefit your boosted car greatly.

[Mr. Man]

Try different ways till you find what combo works for you, the car and the track on that particular day/night.

[JBeezy]

Yes, I plan on trying different ways to see what works. I guess I could on the street as far as launching. The night we go is moonlight madness and it's just that, madness. Mom's and grandma cars out there by the tons, so runs are limited.

I took my mustang the last 2 weeks and got 2 runs each night.

[fastblackmerc]

A/C Off
Traction Control Off (if equipt)
Transmission in Drive
O/D Off
Preload the Torque Converter until the tires just start to break loose
Release the Brake
Mash the Go pedal

[JBeezy]

Just wondering. In stock form can this same method be used? I tried that stock and the take off was crap. Then I just floored it off idle and it took off better.

Stock, was the torque converter locking up when brake torquing it?

[Marauderman]

A/C Off
Traction Control Off (if equipt)
Transmission in Drive
O/D Off
Preload the Torque Converter until the tires just start to break loose
Release the Brake
Mash the Go pedal

My bro is correct here^^^^--and yes --should work for you--just try it a few time to get what works like others said......let us know...



Just wondering. In stock form can this same method be used? I tried that stock and the take off was crap. Then I just floored it off idle and it took off better.

Stock, was the torque converter locking up when brake torquing it?

........see above

[Cheeseheadbob]

This is the advice I asked for and received before I ran the 1/4 for the first time ever. Following these instructions to a "T" resulted in a 12.4 ET with zero wheel spin at launch.

If I may add one additional step; Air Ride Off.

Quite a rush! :burnout:
A/C Off
Traction Control Off (if equipt)
Transmission in Drive
O/D Off
Preload the Torque Converter until the tires just start to break loose
Release the Brake
Mash the Go pedal

[JBeezy]

This is the advice I asked for and received before I ran the 1/4 for the first time ever. Following these instructions to a "T" resulted in a 12.4 ET with zero wheel spin at launch.

If I may add one additional step; Air Ride Off.

Quite a rush! :burnout:
What were your mods at this time when you ran 12.4? I'm stock exhaust except Magnaflows.

[justbob]

Leave on the last yellow.. [emoji4]

As for RPMs. Mine bone stock did slightly better off idle. My old Trilogy set DEFINITELY preferred off idle. Doing so I went from consistent 12.8's to endless 12.1's even hot lapped. Every car is different..


Builder Of Badassery

[Triple Threat]

[QUOTE=fastblackmerc;1471271]A/C Off
Traction Control Off (if equipt)
Transmission in Drive
O/D Off
Preload the Torque Converter until the tires just start to break loose
Release the Brake
Mash the Go pedal[/QUOTE

Good advice

[Spectragod]

[QUOTE=fastblackmerc;1471271]A/C Off
Traction Control Off (if equipt)
Transmission in Drive
O/D Off
Preload the Torque Converter until the tires just start to break loose
Release the Brake
Mash the Go pedal[/QUOTE

Good advice

Unless your car actually make power and you don't have DR's.

[JBeezy]

Well I am a centrifugal guy here. I think most are roots. I could be wrong. Not making a lot of low end torque.

[Spectragod]

Well I am a centrifugal guy here. I think most are roots. I could be wrong. Not making a lot of low end torque.

I know the feeling, I'm only making 263tq at the rear wheel, I probably need a better tune....:confused:

[JBeezy]

I think my torque is higher than that, but that's up in the rpm's when boost is built.
Can't really remember, didn't really care to be honest. I more of a show me guy. Don't do the paper racing. I've never dyno'd my mustang or care to. It went 11.62 Friday night. Getting faster as I tweak the suspension and launch rpm's

[Spectragod]

Well, mine being a DTR....... it's slow, runs solid 16's, but it's consistent.

[JBeezy]

Got a chance to drive my car yesterday. I tried launching it off idle, 12-1500 rpm, and braking it until the tires almost break traction. 12-1500 rpm was the best. Therefore that's what I'm going to try when I make it to the drag strip. Thanks guys!!!

[JBeezy]

Should I let any air out my rear tires? I have widened wheels with 295's. I usually have 35 psi in them

[MOTOWN]

Drop em down to 18psl

[sailsmen]

Should I let any air out my rear tires? I have widened wheels with 295's. I usually have 35 psi in them

What make and model tires?

[8UWITH6]

Do not drop the pressures much on a street radial tire. And only do a light burnout to clean off the tires.

[MOTOWN]

Do not drop the pressures much on a street radial tire. And only do a light burnout to clean off the tires.

That will never work on a Centrifugal car.

[JBeezy]

Hankook Ventus or something like that.

[BigM460]

A street tire at Steele with 0 track prep is not going to make you happy!
The track is WORSE than a damp road in the left lane and only slightly better in the right.
:burnout: is crazy there on street tires.
You were there the last time I was. The tight converter will most likely help, but still........

[JBeezy]

Yea, but I'm thinking being lower on power than you are will actually help. My car doesn't blow the tires away on the street at all. Launching from 12-1500 rpm chirps them a little on take off

Oh and that left lane is crap. They drug the track for 15 min the last time I was there and the mustang spun bad afterwards.

Actually here's that run. 1st run it went 11.62 at 116 with a 1.59 60' in the right lane. Same type of burnout on M/T drag radials

https://youtu.be/tdMNvkr-MQY

[8UWITH6]

That will never work on a Centrifugal car.


I am struggling to understand why the type of power adder has anything to do with a preparation for launch technique? Letting air out of a radial tire reduces the contact patch with the pavement and the sidewall construction is not designed to wrinkle. And doing a huge burnout makes radial tires grip worse as the rubber compound is different than you traditional racing slick or drag radial.

I guess in short I should have stated that it is pointless to try and launch a decently powered car on street tires and expect good results. :-)

[MOTOWN]

I am struggling to understand why the type of power adder has anything to do with a preparation for launch technique? Letting air out of a radial tire reduces the contact patch with the pavement and the sidewall construction is not designed to wrinkle. And doing a huge burnout makes radial tires grip worse as the rubber compound is different than you traditional racing slick or drag radial.

I guess in short I should have stated that it is pointless to try and launch a decently powered car on street tires and expect good results. :-)

I agree attempting to launch a S/C car on street radials isn't going to work well, however neither will launching that same car with a "light " burnout achieve anything other than the car falling flat on its face , and dropping tire pressure to 18psl will not decrease the contact patch it will increase it (did this for years street racing).

The main thing that will hurt his et is the lack of a stall speed converter, a Centrifugal car needs to spool up to get a 60ft which will make or break a good et if the power is there , and the type of power adder has a lot to do with the way a car is launched the off the line.

[JBeezy]

Exactly. I've raced for years but always had stick cars. I had no plans of doing any type of long burn out. Maybe spin them over to clean them off. As I said before, it doesn't break the tires lose like these root style blowers (low end torque) on the street. Simply wanted input from other centrifugal guys that has experienced this. As we all know, power is made on up in the rpm's.

I guess I'll just try out a few things to see what happens. I do have slicks and drag radials I could put on the car but I do still have stock axles.

[MOTOWN]

Exactly. I've raced for years but always had stick cars. I had no plans of doing any type of long burn out. Maybe spin them over to clean them off. As I said before, it doesn't break the tires lose like these root style blowers (low end torque) on the street. Simply wanted input from other centrifugal guys that has experienced this. As we all know, power is made on up in the rpm's.

I guess I'll just try out a few things to see what happens. I do have slicks and drag radials I could put on the car but I do still have stock axles.

At your power level i would use the drag radials which will help, and the 28 splines will be fine ,think a full slick may bog the car down more than it will help, looking forward to your results.

[JBeezy]

I'll take them with me just in case. Friday it's going down LOL! I have a date with my buddies MKS ecoboost

[8UWITH6]

We will agree to disagree. Your 60ft directly affects your ET. A tenth quicker 60ft is usually 2 tenths quicker on the big end. But you both should know that. Good luck in your trials.

[MOTOWN]

We will agree to disagree. Your 60ft directly affects your ET. A tenth quicker 60ft is usually 2 tenths quicker on the big end. But you both should know that. Good luck in your trials.
I totally agree with you on the 60ft ! That's what I was saying, we just disagree on the rest! Lol

[JBeezy]

I see what you both are saying. Definitely! I hope I'm right, I just don't think I will have a problem at the line, especially since I don't have that issue on the street. I know the track and the street is totally different, but I'll see. I may let the rears down to 28 psi or so and see how it does going down the track. If no issue, may go a little lower, not much more than that. I also may leave the 18" spare in the trunk and take out my 100 lbs. speaker box though

[sailsmen]

First time with S/C, Street Tires on a wet track;
0.191 1.881 5.362 8.227 84.99 10.744 12.862 106.71
Details - 10+ years ago;
http://www.mercurymarauder.net/forums/showthread.php?t=18149&highlight=impala

[JBeezy]

First time with S/C, Street Tires on a wet track;
0.1911.8815.3628.22784.9910.74 412.862106.71
Details - 10+ years ago;
http://www.mercurymarauder.net/forums/showthread.php?t=18149&highlight=impala
What S/C were you running? I can't see your signature via Tapatalk

[justbob]

Centris aren't supposed to put down low end torque? Mine must be broke. [emoji4]


Builder Of Badassery

[MOTOWN]

Centris aren't supposed to put down low end torque? Mine must be broke. [emoji4]


Builder Of Badassery

Make that two broke Centris :banana2:

[JBeezy]

Make that two broke Centris :banana2:
Not much at low rpm's when your max boost is 10 psi. I don't think either of you guys has ever had that low of boost lol.

[sailsmen]

What S/C were you running? I can't see your signature via Tapatalk

Vortech Super Charger V-2

[sailsmen]

For years the lowest 60' was by a Centri.

[justbob]

I don't think either of you guys has ever had that low of boost lol.


That chapter was missing from the book. I knew something wasn't quite right. [emoji4]


Builder Of Badassery

[JBeezy]

Lol! One day I'll be lucky enough to push 16 psi or better thru a forged engine. Have an cobra longblock rebuilt on the stand but can't make myself pull this 58k mile engine

[JBeezy]

Tonight is the night. Suggestions. Should I leave the 100 lb speaker box in the trunk or take it out? I'm thinking the weight can help with traction, and hurt my ET due to extra weight.

Also, should I turn off the air ride? Any help from this?

[MOTOWN]

Tonight is the night. Suggestions. Should I leave the 100 lb speaker box in the trunk or take it out? I'm thinking the weight can help with traction, and hurt my ET due to extra weight.

Also, should I turn off the air ride? Any help from this?

Definetly take the box out , and do not turn off the air suspension.

[BigM460]

Tonight is the night. Suggestions. Should I leave the 100 lb speaker box in the trunk or take it out? I'm thinking the weight can help with traction, and hurt my ET due to extra weight.

Also, should I turn off the air ride? Any help from this?

I would leave it in. Will most likely help more than it will hurt you. Unless you're putting good tires on, then take it out.
What would the air ride being off do? To set lower in the rear once it bleeds down?
Should be a very good weather night! Temps are going to drop like a rock tonight.

[JBeezy]

I don't know. Someone suggested it earlier on. That's why I asked. Didn't make sense to me either.

[JBeezy]

Results are in.

Car went 13.12 the first pass @ 107 with a 2.075 60'. That was against a GTO.

Second pass it went 13.014 @108 with a 2.107 60'. That was against a Trans Am. Can I get a h*ll yea!! Tree'd them both.

Forgot to mention, that was leaving at 1200 rpm and took the spare and speaker box out. Tried to leave at 1500 and it spun bad...

[Bob Mathis]

Good deal! Times look good. Was that on stock tires?

[m.gaddis04]

Good deal on taking out some ls cars lol.

[JBeezy]

Yes, street tires. If I had drag radials I could have left harder and better E/T. I'm good with these times for gears and I guess 9 psi. No other mods. I just wanted to see what it would do after being boosted for a while now.
Check this out

Watch "1st pass" on YouTube
https://youtu.be/XDHIw2s-vas

[JBeezy]

Good deal on taking out some ls cars lol.
First guy in the GTO came over and said, were you sand bagging? He thought I was you, lol.

[Davco]

Jbeezy, what track were you running at?

[JBeezy]

Alabama international Dragway in Steele, Al.

[cer0413]

Results are in.

Car went 13.12 the first pass @ 107 with a 2.075 60'. That was against a GTO.

Second pass it went 13.014 @108 with a 2.107 60'. That was against a Trans Am. Can I get a h*ll yea!! Tree'd them both.

Forgot to mention, that was leaving at 1200 rpm and took the spare and speaker box out. Tried to leave at 1500 and it spun bad...
Easy mid to high 12s car with drags and no spin. Not bad man.

[Davco]

Alabama international Dragway in Steele, Al.

We've been talking about going over there to check it out (I've never been but my buddies have). Do they shut down for the winter?

[JBeezy]

I think til December some time

[JBeezy]

I meant to add this video. I guess it's never too late to see a MM kill a GM.

https://youtu.be/BHz-t7r7bB0

And my solo Pass

https://youtu.be/Xr38C6Y_QZU

Sent from my SAMSUNG-SM-G935A using Tapatalk

[JBeezy]

Hey guys, what's the lowest air pressure you have run on street tires at the drag strip? I think I did 28 the last time I was there. I'm going tonight to try to make a street car top 10 list

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[MOTOWN]

Hey guys, what's the lowest air pressure you have run on street tires at the drag strip? I think I did 28 the last time I was there. I'm going tonight to try to make a street car top 10 list

Sent from my SAMSUNG-SM-G935A using Tapatalk

On street radials i ran 18 to 20psi

[JBeezy]

On street radials i ran 18 to 20psi
Unfortunately I'll be on these Hankook 295's. I'm axles and converter away from that route

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[JBeezy]

How will this come into play when I install the converter. I'm asking as I've always raced manual transmissions cars. Never an auto

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[WPG_Merc]

This is the advice I asked for and received before I ran the 1/4 for the first time ever. Following these instructions to a "T" resulted in a 12.4 ET with zero wheel spin at launch.

If I may add one additional step; Air Ride Off.

Quite a rush! :burnout:
If I may also add is pay attention to the track staff & signals & get to know local racers & staff & stay calm & relaxed.
It works for me at the track.:beer:

[sailsmen]

I get there early to walk the launch pad, get reference on the "starting line" and the water box.
On street tires I believe it was 24psi.

On drag radials I start out at 18psi and work my way down as required.

Weather and track conditions usually dictate the psi.