i have a manual boost controller mounted in the engine bay right on the radiator core support to be exact. my question is this>if i mount the boost controller inside the cab for quicker access will the much longer vacuum line cause longer spooling>less spool or even false boost readings? i just hate having to pop the hood open every time to adjust.
man. boost controller (?)
- Thread starter i8av8
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Quickstop [UK]
Combating adversyty.
Re: man. boost controller (?)
The longer line could cause you lag, get kinked when working on the truck etc etc. What controller is it? Can you not get one with a controller in the cab? Greddy Profec BII or the PLX?
The longer line could cause you lag, get kinked when working on the truck etc etc. What controller is it? Can you not get one with a controller in the cab? Greddy Profec BII or the PLX?
Daryl H
Donating Member
Re: man. boost controller (?)
I realize that you already have a manual boost controller....
Hallman Evolution RX Kit Manual Boost Controller MBC (EBAY)
Is the most awesome-est MBC out there. I did not get the cable for it.
It maintains + - 1.5 PSI of where I set it at on my stock upgrade turbo w/ A2A intercooler.
Make sure there is the heavy spring in the kit and bypass the OEM controller.
I realize that you already have a manual boost controller....
Hallman Evolution RX Kit Manual Boost Controller MBC (EBAY)
Is the most awesome-est MBC out there. I did not get the cable for it.
It maintains + - 1.5 PSI of where I set it at on my stock upgrade turbo w/ A2A intercooler.
Make sure there is the heavy spring in the kit and bypass the OEM controller.
Brassmonkey
Cruzin' Mel Man
Re: man. boost controller (?)
I have a manual boost controller also and it is a pain to get out, raise the hood, and change the setting. I have thought about moving the controller inside also. I think that if you use a hard (copper/steel) line for most of the distant to inside the cab, you should be alright. The longer the hose, the more of a ballooning effect you will get, thereby having overboost problems, IMO.
I have a manual boost controller also and it is a pain to get out, raise the hood, and change the setting. I have thought about moving the controller inside also. I think that if you use a hard (copper/steel) line for most of the distant to inside the cab, you should be alright. The longer the hose, the more of a ballooning effect you will get, thereby having overboost problems, IMO.
Re: man. boost controller (?)
i hate to ask this, but what exactly is "overboost" and what does it feel like? this is my 1st turbo vehicle and i've only owned it since '08. not experienced like most of you
i hate to ask this, but what exactly is "overboost" and what does it feel like? this is my 1st turbo vehicle and i've only owned it since '08. not experienced like most of you
blk00z28
Forced to by choice
Re: man. boost controller (?)
Over boost is when you have your wg to open when you hit say, 20psi. And you actually make more then that when you don't want or plan for it to do that. (usually 5+psi more..)
I think Jimmy has it inside the cab on his ty. I remember it at least from when I met him a few years ago.
And, what type of lag are we talking about here? Spooling lag, or the lag in time it takes for the wg to register the amount of psi going to it? Because If its set at 15psi under the hood, the extra hose would make it be say, 14.5ps, but the lag in time it takes for the air to hit the controller and then back to the wg would make you over boost for a split second rather then controlling it more accurately.
Over boost is when you have your wg to open when you hit say, 20psi. And you actually make more then that when you don't want or plan for it to do that. (usually 5+psi more..)
I think Jimmy has it inside the cab on his ty. I remember it at least from when I met him a few years ago.
And, what type of lag are we talking about here? Spooling lag, or the lag in time it takes for the wg to register the amount of psi going to it? Because If its set at 15psi under the hood, the extra hose would make it be say, 14.5ps, but the lag in time it takes for the air to hit the controller and then back to the wg would make you over boost for a split second rather then controlling it more accurately.
Brassmonkey
Cruzin' Mel Man
Re: man. boost controller (?)
Overboost = more boost that wanted and if feels like crap/nose dive and sounds like a sewing machine running under your hood. Mainly, it is producing more boost than the engine was designed to run at and live, plus higher cylinder pressure than the gas octane will tolerate before detonation occurs.
i hate to ask this, but what exactly is "overboost" and what does it feel like? this is my 1st turbo vehicle and i've only owned it since '08. not experienced like most of you
Overboost = more boost that wanted and if feels like crap/nose dive and sounds like a sewing machine running under your hood. Mainly, it is producing more boost than the engine was designed to run at and live, plus higher cylinder pressure than the gas octane will tolerate before detonation occurs.
blk00z28
Forced to by choice
Re: man. boost controller (?)
Well you can run it to the cab. But just remember that if you want to run 25psi you might have a high chance of over boosting if you stab it really fast, or let it spool quick and blowing up the motor.
But if your around 18psi I probably wouldn't worry about it to much, just make sure your tune is set up to adjust for ob, if nothing else a fuel cut at a determined psi like, 22psi so you don't blow it. I had my fuel cut set at 26 psi and I would bounce off it when I was set at 25psi on the manual boost controller under the hood. (Boost valve, was the controller btw)
Well you can run it to the cab. But just remember that if you want to run 25psi you might have a high chance of over boosting if you stab it really fast, or let it spool quick and blowing up the motor.
But if your around 18psi I probably wouldn't worry about it to much, just make sure your tune is set up to adjust for ob, if nothing else a fuel cut at a determined psi like, 22psi so you don't blow it. I had my fuel cut set at 26 psi and I would bounce off it when I was set at 25psi on the manual boost controller under the hood. (Boost valve, was the controller btw)
turbodig
Active member
Re: man. boost controller (?)
The true problem with having a boost control knob inside the cab- loose nut behind the wheel.
If it's there, you'll turn it. Probably when you don't have the gas for more boost. Probably when you don't have any sort of monitoring to watch for knock.
Randomly changing boost levels is a *bad* idea. Find the boost level that the motor will tolerate (without knock) on the gas that you run, and leave it there.
The true problem with having a boost control knob inside the cab- loose nut behind the wheel.
If it's there, you'll turn it. Probably when you don't have the gas for more boost. Probably when you don't have any sort of monitoring to watch for knock.
Randomly changing boost levels is a *bad* idea. Find the boost level that the motor will tolerate (without knock) on the gas that you run, and leave it there.
Brassmonkey
Cruzin' Mel Man
Re: man. boost controller (?)
WELL SAID, that is exactly why I haven't moved mine to the cab. :tup:
WELL SAID, that is exactly why I haven't moved mine to the cab. :tup:
BoostedSUV
Active member
Re: man. boost controller (?)
Put a Greddy Profec spec B elec boost controller in the glove box/console. Best upgrade I did! Gave me total control of my boost PSI with out running 6ft of vacuum line into the cab. BUT like Dig said, set to where it needs to be and leave it alone... Don't be a dummy and crank the boost up becasue the knuckle next to you wants to race! Lol
Mine controller has a high and a low setting with a single button to switch between the two. Low is for 93 octane pump gas (18psi) and the high is for meth spray or race gas (25psi).
Put a Greddy Profec spec B elec boost controller in the glove box/console. Best upgrade I did! Gave me total control of my boost PSI with out running 6ft of vacuum line into the cab. BUT like Dig said, set to where it needs to be and leave it alone... Don't be a dummy and crank the boost up becasue the knuckle next to you wants to race! Lol
Mine controller has a high and a low setting with a single button to switch between the two. Low is for 93 octane pump gas (18psi) and the high is for meth spray or race gas (25psi).
Re: man. boost controller (?)
i understand what yous guys are telling me, loud and clear but what you are saying about low>93 oct.(18psi) and high>meth/alky(25psi) raises a whole new question for me.
what is or should be the boost psi. cut off for 93 oct.? on my last track run i got into the low 20's but no where near 25psi. 21-22psi. to be exact. even then i thought i was pushing it to the limit. i can not even think of going 25psi.
i understand what yous guys are telling me, loud and clear but what you are saying about low>93 oct.(18psi) and high>meth/alky(25psi) raises a whole new question for me.
what is or should be the boost psi. cut off for 93 oct.? on my last track run i got into the low 20's but no where near 25psi. 21-22psi. to be exact. even then i thought i was pushing it to the limit. i can not even think of going 25psi.
turbodig
Active member
Re: man. boost controller (?)
Well, first off 18 psi may be on the high end, depending on what your setup is like, but DM or TP will tell you that for sure. I generally don't get much past 16 on pump gas, but it varies from one area of the country to another and from summer to winter.
Stock overboost cutoff was ~15 psi for more than 2 seconds sustained (ie, it had to *stay* above that) on all the stock calibrations. Most of the aftermarket chips removed this limitation.
Any of the 3 bar chips have the ability to set a fuel safety cutoff at any boost level up to about 28 psi. I'm kinda surprised more people don't use this, as it would save a lot of motors.
What it'll run on meth/alky depends on how good the chip tune is. Again, DM or TP (KR) will tell you if you've gone too far. Some are in the low 20s, others are in the mid 20s. Others higher.
Well, first off 18 psi may be on the high end, depending on what your setup is like, but DM or TP will tell you that for sure. I generally don't get much past 16 on pump gas, but it varies from one area of the country to another and from summer to winter.
Stock overboost cutoff was ~15 psi for more than 2 seconds sustained (ie, it had to *stay* above that) on all the stock calibrations. Most of the aftermarket chips removed this limitation.
Any of the 3 bar chips have the ability to set a fuel safety cutoff at any boost level up to about 28 psi. I'm kinda surprised more people don't use this, as it would save a lot of motors.
What it'll run on meth/alky depends on how good the chip tune is. Again, DM or TP (KR) will tell you if you've gone too far. Some are in the low 20s, others are in the mid 20s. Others higher.
BoostedSUV
Active member
Re: man. boost controller (?)
Exactly... There is no set number that works. It all depends on the build and tune. There are a lot of differences from truck to truck and build to build so each case is a unique one. You really need DataMaster and watch for knock/spark retard to determine that number.
I think I read that your truck is "untuned" and based on that if you are running 20psi on 93oct I would say its only a matter of time before you blow it up. You REALLY need to datalog it and watch VERY carefully for engine knock. It does not take much to blow these things up...
Exactly... There is no set number that works. It all depends on the build and tune. There are a lot of differences from truck to truck and build to build so each case is a unique one. You really need DataMaster and watch for knock/spark retard to determine that number.
I think I read that your truck is "untuned" and based on that if you are running 20psi on 93oct I would say its only a matter of time before you blow it up. You REALLY need to datalog it and watch VERY carefully for engine knock. It does not take much to blow these things up...
Re: man. boost controller (?)
again with my head down in shame for the no tune
not that it makes much of a difference, but i only go into the 20's with race gas. i have the boost and ultimate box turned down for street.
again with my head down in shame for the no tune not that it makes much of a difference, but i only go into the 20's with race gas. i have the boost and ultimate box turned down for street.