JLT Highboost with a separate MAF Housing ?

[MaxSimoneau]

Just want to know if someone already modified their JLT Highboost intake to have a separate housing for the MAf sensor.. my car can't be email tuned by VMP with the sensor inside of the HB intake and I just bought the Intake lol Don't feel like trowing 300$ to garbage..

That's the message I got from VMP ;
''We can tune a car that has a JLT high boost. We won't tune a car that is running a MAF sensor inside the JLT high boost tube. The MAF has to be in a separate housing. ''

So anyone ever cured this problem other than buying another intake ahah ?

 

[cj428mach]

Block hole in side of high boost, install maf on the end of high boost via silicone coupler....tadaa JLT True Cold Air kit.

 

[03 Indy Cobra]

Block hole in side of high boost, install maf on the end of high boost via silicone coupler....tadaa JLT True Cold Air kit.

This.

 

[Bigggy]

But will there be enough space for the filter? I had the same email from VMP when I had some questions regarding a tune. They say that the tube will generate too much turbulence. But what about cutting the tube and inserting a straightener in there, maybe it wouldn't be close enough to the MAF to do anything.

 

[GodStang]

Block hole in side of high boost, install maf on the end of high boost via silicone coupler....tadaa JLT True Cold Air kit.

This is how the original High boost was done. Can either do as he stated or get someone that can tune it. It may be because they can not put it on a dyno and tune. Some draw backs to mail order tune.

 

[cj428mach]

But will there be enough space for the filter? I had the same email from VMP when I had some questions regarding a tune. They say that the tube will generate too much turbulence. But what about cutting the tube and inserting a straightener in there, maybe it wouldn't be close enough to the MAF to do anything.

This really gets frustrating explaining this I wish JLT would do a better job of it on their website.

THE TUBE FOR THE HIGH BOOST AND THE TRUE COLD AIR KIT IS EXACTLY THE SAME!

If you have the true cold air kit and want a high boost, remove the MAF off the end and drill the tube for the sensor. If you have the high boost and want the cold air block the sensor hole and move the MAF to the end of the tube.

 

[MaxSimoneau]

ok thanks I will try to find silicone couplers and see if the 12'' Filter still fits

 

[96gt02]

The 12" high boost will not fit, you need a 6" filter if your running the regular maf housing with silicone coupler

 

[MaxSimoneau]

The 12" high boost will not fit, you need a 6" filter if your running the regular maf housing with silicone coupler

oh dam. Thanks for the reply

 

[96gt02]

I mean unless you want it to be like a straw and suck up anything on the ground haha

 

[Bigggy]

I just got a baseline tune from Bama to start tuning the MAF with this intake. After reading so much stuff on this intake and turbulence caused by the two bends before de MAF, I've decided to cut down the tube and insert a MAF straightener about 3 inch before the MAF. Cutting the bue and adding a rubber coupling will also help for the fitment cause it was not so great with the intake in onr piece.

Nice forum where I've found info:
http://www.hptuners.com/forum/showthread.php?26546-100mm-Maf-kickin-my-Butt!!!

Some exemple of honeycomb:
http://www.saxonpc.com/
http://www.treadstoneperformance.com/product.phtml?p=68172

I will be updating this thread to you guys know if it works out well.

 

[MaxSimoneau]

I just got a baseline tune from Bama to start tuning the MAF with this intake. After reading so much stuff on this intake and turbulence caused by the two bends before de MAF, I've decided to cut down the tube and insert a MAF straightener about 3 inch before the MAF. Cutting the bue and adding a rubber coupling will also help for the fitment cause it was not so great with the intake in onr piece.

Nice forum where I've found info:
http://www.hptuners.com/forum/showthread.php?26546-100mm-Maf-kickin-my-Butt!!!

Some exemple of honeycomb:
http://www.saxonpc.com/
http://www.treadstoneperformance.com/product.phtml?p=68172

I will be updating this thread to you guys know if it works out well.

thanks a lot. we are waiting for your update

 

[Bigggy]

Might take a week or two to receive the air straightener but I'll update the thread

 

[Bigggy]

Here is some picture of the air straightener from Saxonpc.com

http://www.saxonpc.com/100mm-cells-for-100.html

I is a 8:1 cell in 100mm.

I've glued tabs inside to block the air straightener and then puts some rtv tabs on the outside simply to hold it. It is not the best looking job but it will be hidden anyway. In the background you can see the tube cut down with an additional coupler. I've sent idles datalogs to my tuner to have a first revision.

Cutting the tube also helped to place the tube and filter which were a PITA before.

 

[a94cobra]

So is the jtl tuneable at all then without this? Seems Like they would include this if it were so hard to tune.

 

[cj428mach]

So is the jtl tuneable at all then without this? Seems Like they would include this if it were so hard to tune.

Probably everything you'd ever want to know about the high boost

http://www.svtperformance.com/forum...ost-intake-with-a-SCT-BA2600-and-who-tuned-it

 

[MalcolmV8]

Here is some picture of the air straightener from Saxonpc.com

I is a 8:1 cell in 100mm.

That seems like a pain to work with and possibly even restrictive to air flow. All you need is some screen mesh. It must be metal though, I tried nylon and it does not work.

To give you an example here's a car's MAF signal I was working on. It was horribly noisy which directly affects drivability.

I use aluminum mesh to create a screen in front of the MAF sensor.

Here's how it affected the signal.
Before the screen

Here's the signal after the screen

Is that not amazing what a little bit of aluminum screen does? The drivability went up tremendously with this tiny modification. I tried adding a second screen about 4 inches apart and there was no additional improvement. One screen is all you need.

As for VMP not wanting to tune the JLT intake with the sensor located where it's at it's because of the turn or bend in the pipe before the sensor going into fender. I experienced this when I built my own high boost intake (unlike JLT's tiny one). I noticed immediately my drivability was affected. Some analysis showed similar results to what I showed above.
Here you can see my intake was fairly straight shot.

I then built a massive 6" ID intake into the fender

This was my car idling on the straight intake

This was my car idling on the new intake that went into the fender.

All that really changed was the curve in front of my MAF sensor as it re-routed into the fender. I had essentially introduced the same issue JLT did with a curve in front of the sensor. This is why VMP won't tune that combo.

As for my filter setup. The whole reason I built that was to get the intake into the fender and stop sucking in hot engine bay heat but what I found was the radiator heat would blow into it all the same most of the time so it really didn't accomplish as much as I wanted. I ended up scrapping it and going back to the straight intake under hood.

If you're not familiar the MAF sensor is probably the single most critical sensor on the car. It tells the ECU how much air is going into the engine and practically everything else is calculated and derived from that. So when that signal is a mess everything suffers including drivability.