Single Turbo RX-7's Questions about all aspects of single turbo setups.

launching with boost?

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Old 01-21-06, 12:17 PM
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Oh Yeh.
You're tune up is also going to change a lot with the auto. You'll have to do a lot of tunig at the track/street because the dyno can't load the tranny properly with that much stall. The weight of the car affects the stall/load the tranny puts on the motor.
Old 01-21-06, 12:17 PM
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Originally Posted by crispeed
FULL BOOST
Normaly you can take advantage of the automatic and use a huge turbine section on the turbo and reap all the benefits of doing so.
You should contact Mike Lowe from Low performance here in Florida. Mike been running an auto on his 1st gen for many years now. He competes in the outlaw/modified class and runs consistent low 8's with an auto behind his 13B.
I'll contact him....

So, a two step isn't needed like you would need on a 5 speed?
Old 01-21-06, 02:35 PM
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Your still going to use a two step. The trans brake doesn't control rpm. Like Crispeed stated it locks reverse and 1st together so the car doesn't move. The car will act like it's in neutral until you like go of button. Which you'll should tie into the 2step as well...
Old 01-21-06, 03:34 PM
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A stalled converter will let it load up though...
Old 01-22-06, 10:51 PM
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If you have a larger turbo, just reving it out won't do it. I found out the hard way. Ray hooked up the anti-lag on my car. Very crazy but effective. I build around 15psi on the line.
Old 01-22-06, 11:30 PM
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Originally Posted by ErnieT
If you have a larger turbo, just reving it out won't do it. I found out the hard way. Ray hooked up the anti-lag on my car. Very crazy but effective. I build around 15psi on the line.
Normally even with a GT-42 you can make 15 to 25psi on the two step alone.
The type of two step makes a whole lot of difference though.
Old 01-22-06, 11:32 PM
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Originally Posted by enzo250
Your still going to use a two step. Which you'll should tie into the 2step as well...
Some people tie it into the line lock also.
Old 01-23-06, 09:35 AM
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Originally Posted by crispeed
Some people tie it into the line lock also.
Will I still need the 3 msd boxes, 3 two steps and 3 rpm selectors to make it work with the auto?

You said different types of 2'steps....... what types are there?
Old 01-23-06, 01:13 PM
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Originally Posted by crispeed
Some people tie it into the line lock also.
Yup... Agreed...
Old 01-24-06, 04:23 PM
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Originally Posted by LUPE
Will I still need the 3 msd boxes, 3 two steps and 3 rpm selectors to make it work with the auto?

You said different types of 2'steps....... what types are there?
Ignition and fuel cuts
Old 01-25-06, 12:59 AM
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Originally Posted by mmonaco
Ignition and fuel cuts
Soft cut
Soft to hard
Hard cut
Hard to soft

Just to name a few.
Old 02-16-06, 02:28 PM
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Originally Posted by pluto
What I used to do at the beginning of drag racing was to keep the rpm at around 4krpm, and when it turns yellow, I floor it until it reaches 7krpm and dump the clutch. You should be able to get 3-4psi from free reving from 4k to 7k. I was still able to get low 1.60s doing it that way.
I tried this a few months ago and even with a **** poor burnout managed a 1.59 60' on ET streets.
Old 02-16-06, 05:07 PM
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That seems like it would be good for launching, but if you are bracket racing, I don't think it will be very consistant. I would rather just use a two step.

I have noticed that once you do too big of a burn out your 60ft will suffer from the tire being too melted.
Old 02-16-06, 06:30 PM
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Originally Posted by MichaelB145
That seems like it would be good for launching, but if you are bracket racing, I don't think it will be very consistant. I would rather just use a two step.

I have noticed that once you do too big of a burn out your 60ft will suffer from the tire being too melted.
You need someone with a digital pyrometer/laser taking your tire temps while doing a burnout so you get the right temp.
Old 02-16-06, 07:34 PM
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Originally Posted by MichaelB145
That seems like it would be good for launching, but if you are bracket racing, I don't think it will be very consistant. I would rather just use a two step.
When bracket racing, a two-step would definitely be more consistant versus free reving.

I have noticed that once you do too big of a burn out your 60ft will suffer from the tire being too melted.
You should make your burnouts consistant so you can learn your car on whatever tires you are using.
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