using MSD 6AL to launch w/ some boost?
12-24-02, 12:58 PM
#1
using MSD 6AL to launch w/ some boost?
Just curious if you can use a MSD 6AL or other ignition with REV limiter to launch with some boost. Cuz if you jus put ur foot on gas u wont simple get boost like that. With a rev limiter since its by ignition cutting the revs, u can have foot all the way down, so most fuel and most air will get into to make more boost, rite? neone done this before? Any help greatly appreciated, TIA
12-24-02, 02:18 PM
#2
Engine, Not Motor
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It's doubtfull that this type of rev limiting will allow you to boost. Boost is generated when the engine is under load, and at rev limit, it is certainly not under load. In fact, the MSD/Crane boxes simply skip ignition events to keep the engine speed down, which will no doubt reduce the amount of exhaust through the turbo.
12-24-02, 03:17 PM
#3
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Yeah, it'll give you some boost for launch, but not full. You really need a 2 step for that. Clutch in gives you a limit of 4k-5k or where ever you like to launch and once the clutch is out it'll limit at your particular redline.
12-24-02, 10:17 PM
#4
cool thx, thats what I wanted to know. I dunt wanna lauch at full boost (that would **** up ur engine). I jus wanna hear from people who actually have a MSD6AL, or other ignition of the like. I heard that it doesnt cut the revs, just the spark, or something like that on a rotary. TIA
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12-25-02, 04:17 PM
#8
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well maybe if you set the rev limiter at 5k everytime it bounces off the revlimiter the boost will rise alittle, maybe get 5psi at the most from that, but then when you the cluctch out you'll prolly get made boost spike....
12-26-02, 12:31 AM
#13
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There is an anti-lag feature on the haltech that if certain conditions when are met ( I have it set for full throttle from 2000-4000rpms) timing is retarded by 20 or more degrees so that fuel comes out of the engine and burns in the turbo to spool it up quicker, so you get full boost MUCH earlier, full boost in first gear.
An ignition cut (Like the 6AL) will dump raw fuel into the exhaust which may burn in the turbo in a similiar fashion, but not quite like the anti-lag.
Or you could always use nitrous during the launch in first gear and get it spooled real quick.
An ignition cut (Like the 6AL) will dump raw fuel into the exhaust which may burn in the turbo in a similiar fashion, but not quite like the anti-lag.
Or you could always use nitrous during the launch in first gear and get it spooled real quick.
12-26-02, 12:38 AM
#14
Originally posted by Suds7
There is an anti-lag feature on the haltech that if certain conditions when are met ( I have it set for full throttle from 2000-4000rpms) timing is retarded by 20 or more degrees so that fuel comes out of the engine and burns in the turbo to spool it up quicker, so you get full boost MUCH earlier, full boost in first gear.
An ignition cut (Like the 6AL) will dump raw fuel into the exhaust which may burn in the turbo in a similiar fashion, but not quite like the anti-lag.
Or you could always use nitrous during the launch in first gear and get it spooled real quick.
There is an anti-lag feature on the haltech that if certain conditions when are met ( I have it set for full throttle from 2000-4000rpms) timing is retarded by 20 or more degrees so that fuel comes out of the engine and burns in the turbo to spool it up quicker, so you get full boost MUCH earlier, full boost in first gear.
An ignition cut (Like the 6AL) will dump raw fuel into the exhaust which may burn in the turbo in a similiar fashion, but not quite like the anti-lag.
Or you could always use nitrous during the launch in first gear and get it spooled real quick.
12-26-02, 04:12 PM
#17
yea i got the idea from the haltech. because the haltech has like the secondary rev limiter or something like that, and is like a soft touch rev limiter. I would never want to launch at FULL BOOSt, or use nitrous on 1st, that would majorly **** up ur engine. partial boost is good enuff for me. how come ur saying that it wont spool up the turbine Suds? everyone seems to be agreeing that it will give u some partial boost.
12-26-02, 04:23 PM
#18
Originally posted by RexRyder
yea i got the idea from the haltech. because the haltech has like the secondary rev limiter or something like that, and is like a soft touch rev limiter. I would never want to launch at FULL BOOSt, or use nitrous on 1st, that would majorly **** up ur engine. partial boost is good enuff for me. how come ur saying that it wont spool up the turbine Suds? everyone seems to be agreeing that it will give u some partial boost.
yea i got the idea from the haltech. because the haltech has like the secondary rev limiter or something like that, and is like a soft touch rev limiter. I would never want to launch at FULL BOOSt, or use nitrous on 1st, that would majorly **** up ur engine. partial boost is good enuff for me. how come ur saying that it wont spool up the turbine Suds? everyone seems to be agreeing that it will give u some partial boost.
12-26-02, 04:38 PM
#21
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How is it harder on the engine? There is less load on it than in 4th gear. Plus if you are worried about wearing out a turbo from having it spool, maybe you should get a different car 
12-26-02, 04:55 PM
#22
well ok, my frend had a 96 GST, and he would always lauch hard with it, and it would always have problems. And u kno the cars with the real anti-lag always have to rebuild the motor and turbo and stuff, i jus wanna be able to launch w/ some boost w/o rebuilding the motor, or turbo.
12-26-02, 08:00 PM
#24
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Originally posted by RexRyder
well ok, my frend had a 96 GST, and he would always lauch hard with it, and it would always have problems. And u kno the cars with the real anti-lag always have to rebuild the motor and turbo and stuff, i jus wanna be able to launch w/ some boost w/o rebuilding the motor, or turbo.
well ok, my frend had a 96 GST, and he would always lauch hard with it, and it would always have problems. And u kno the cars with the real anti-lag always have to rebuild the motor and turbo and stuff, i jus wanna be able to launch w/ some boost w/o rebuilding the motor, or turbo.