How are you launching in your turbo cars? - Ford Mustang Forums : Corral.net Mustang Forum
 
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post #1 of 19 Old 03-17-2007, 04:55 PM Thread Starter
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How are you launching in your turbo cars?

I never got a chance to try and launch my car, when at the track I just rolled of the line w/ 2.3 60's, once I get it back I am looking to run in the 11's, maybe 10's if I am lucky, and will use drag radials as I don't have the means to swap tires at the track, with that being said how do you launch at the track with your turbo cars.

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post #2 of 19 Old 03-17-2007, 05:06 PM
 
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It depends alot on what tranny you have. I have a lot more experience with an auto since that is what mine is. I roll up within about 4 feet of the beam and I start to drag the car in to light the first bulb. Then when the second is lit and I am on pro tree I just hit the trans brake and mat the throttle. That is if the the other guy is staged. Then the boost is controlled of the controller.

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post #3 of 19 Old 03-17-2007, 05:19 PM Thread Starter
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I've got a TKO600.
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post #4 of 19 Old 03-18-2007, 06:00 PM
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2step with a stick car
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post #5 of 19 Old 03-18-2007, 11:10 PM
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Originally Posted by turboLXstang View Post
I've got a TKO600.
I will be using this trans also.
2.87 first, 3.50 gear, 28" 325/50 MT DR

planned 800/800 power

How would you guys launch this car?
I know free revving to say 4000 and dropping the clutch won't build boost, but I'm OK with that to save parts and not blow off the DRs.
What about a soft rool out launch and really get into it after shifting to 2nd?
-J

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post #6 of 19 Old 03-19-2007, 07:53 AM
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I'm doing the 2 step thing with mine as getting out of the hole has turned very difficult with my turbo car.

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post #7 of 19 Old 03-19-2007, 05:39 PM
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get a 2 step so you can build boost off the line.

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post #8 of 19 Old 03-20-2007, 06:12 AM
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How does a two step work. I always here that but don't know what it is.
Practicing on the street-If I heat my dragradials, I can dump the clutch but if I floor it after the clutch is out, I spin..Need to figure this out soon, heading to the track.
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post #9 of 19 Old 03-20-2007, 07:22 AM
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How does a two step work. I always here that but don't know what it is.
Practicing on the street-If I heat my dragradials, I can dump the clutch but if I floor it after the clutch is out, I spin..Need to figure this out soon, heading to the track.
Erich
A 2-step is a device that retards the ignition timing to hold a certain rpm. Of course, on a turbo car you get the extra benefit of building boost as it's a resultant of retarding the timing. It's typically wired up to a push button switch.

A neat thing you can do though is wire it up to your clutch safety switch. As long as you have the clutch pedal depressed the 2-step will not allow you to pass the set rpm. While your going down the track every time you press the clutch the 2-step activates. It briefly (somewhat) maintains boost between shifts and gives you the ability to powershift with a bit of over-rev protection.

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post #10 of 19 Old 03-20-2007, 04:04 PM
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I still don't know about the 2-step rpm limiter building boost, cause if I hold my car at a constant say 4000rpm in nuetral there is no boost at all.
I was just going to use the 2 step to get the desired rpm launch for a good 60ft time not thinking it would build boost like a transbrake does.
Tonight I'm going to put a 3000rpm pill in my 6al box and hold it to the floor and see for myself if it biulds boost, damn I hope it does then I might stay with my stick tranny.


89'LX 306,T.W.heads,perf.intake,36's,stock cam/1.7's,70mmT.B.,T-56,3.27's,Twin 60/63 T3's intercooled,14psi,Evolution WG's, Meth inj.
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post #11 of 19 Old 03-20-2007, 08:07 PM
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Originally Posted by MOOVS View Post
I still don't know about the 2-step rpm limiter building boost, cause if I hold my car at a constant say 4000rpm in nuetral there is no boost at all.
I was just going to use the 2 step to get the desired rpm launch for a good 60ft time not thinking it would build boost like a transbrake does.
Tonight I'm going to put a 3000rpm pill in my 6al box and hold it to the floor and see for myself if it biulds boost, damn I hope it does then I might stay with my stick tranny.
your correct !! when you hold at a consistant 4000 you foot is barely on the gas pedal and there is no unburned fuel anywhere.. while on the 2 step the gas pedal is FULLY matted lol.

what happens is this....The 2step, pulls spark to the cyls. well with your foot to the floor all that unburned fuel from the cyls burns in the exhaust/turbo making it to spool..

Its about the best you can do with a stick car... I run a MSD digital 6plus. it allows you to pull timing while on the 2step. which helps build even more boost.

rev to 3000 and Im sure you will see 0 boost but try the msd 3000 pill and it should build some.A rev limiter is more of a "load" on the motor then just a "free rev".

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post #12 of 19 Old 03-21-2007, 07:45 AM
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Pretty cool indeed.
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post #13 of 19 Old 03-21-2007, 08:01 AM
 
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Quote:
2step with a stick car
Agree

Transbrake with a auto turbo car!!!
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post #14 of 19 Old 03-21-2007, 08:34 AM
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very interesting,, what about using trans brake and 2 step on auto?? i still have the clutch pedal in my car from when it was a 5spd,

this could get interesting

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post #15 of 19 Old 03-21-2007, 02:56 PM
 
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very interesting,, what about using trans brake and 2 step on auto?? i still have the clutch pedal in my car from when it was a 5spd,

this could get interesting
if the car is an auto just hit the transbrake and mat the throttle. The car will only rev to your stall speed
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post #16 of 19 Old 03-21-2007, 07:43 PM
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Turbo and manual and drag strip don't make an easy mix...
I run in street class 12.99 and slower bracket events...
The guys enter from supper street and blast my 60 Ft by 3 car lengths..
But I'm not converting to auto, hi stall, 90/10's and soft suspension!!!
From then on we are equal, in most cases my mph is faster...

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post #17 of 19 Old 03-25-2007, 08:36 PM
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It made boost! put the 3000rpm pill in my msd rev limiter and held it to the floor, boost wasn't instant but it made 4psi after about 2-3 seconds Ill try a 4000pill next to see if it'll make more.
10's here I come!!!!

89'LX 306,T.W.heads,perf.intake,36's,stock cam/1.7's,70mmT.B.,T-56,3.27's,Twin 60/63 T3's intercooled,14psi,Evolution WG's, Meth inj.
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post #18 of 19 Old 03-30-2007, 05:27 AM
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MOOVS-what was your 60 foot?
Maybe another thing about building some boost would be that you can keep the weight on the rear tires more. I did some experiments on the street with my car. First thing I found out by checking was that the old BFG dragradials do get nice and sticky after a short dry burnout. Second, with the pressure at 15 psi, I see the entire width of the tire on the road from the burnout. Third, it is not dropping the clutch that spins the tires, it is when the turbos hit. So I move and then spin. Maybe a harder launch would actually be better in this case. Also maybe less air pressure.
Erich

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post #19 of 19 Old 03-31-2007, 05:23 PM
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It did a 1.79 on the 11.0 pass which isn't that bad , but I had alot of trouble launching with the tires heated as it always wanted to bog.
I also have had trouble launching with the tires colder as it semi-hooks then blows the tires of 10ft out when boost hits.
I'm thinking with a two stage I can launch after a healthy burnout at say 4000rpm or so and it shouldn't bog and might stay planted.
I'm probably going to waste this set of tires trying to find the right rpm for launch.

89'LX 306,T.W.heads,perf.intake,36's,stock cam/1.7's,70mmT.B.,T-56,3.27's,Twin 60/63 T3's intercooled,14psi,Evolution WG's, Meth inj.
579.2rwhp 658.6rwtq,[email protected] kicked off track
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