Installed DM "new" 7MGTE Intercooler.. question about boost...

[Grandavi]

Basically, there are only 3 things a person would need to worry about then...
1. The core is too small or piping restrictive (as in the stock)
2. The core and/or piping is too big (whereas you wont be able to build enough flow so actually hurt performance...
3. The intercooler piping and/or core is leaking somewhere. (obvious)

Other than that because this is a common intercooler, I should be okay. I am still not clear on why my max boost is registering as 7 PSI at the intake manifold (where the boost controller is reading), but I am fairly certain that is just the 3 psi drop I get when running with this new intercooler. Once I up the boost so that the upgraded intercooler is actually necessary, then the pressures should equal out better. (guessing)

 

[IJ.]

If it's an actual 3psi drop across the Intercooler the Core is JUNK....

My 4" core A2A I ran in the Mk3 had a half a psi drop.

 

[Grandavi]

Well, Im not the first to run the core in a MK3... (I dont think). Its a CXRacing core..
http://www.cxracing.com/mm5/merchan...IT-7MGTE-IC10-IC0010-25-A&Category_Code=ICKTY

So, I think its a proven core. All I know is that currently (without looking for leaks yet) when I ran the 60-1 on the stock intercooler I was getting 10 psi running of the wastegate. Installed intercooler and piping.. and I get 7psi off of the wastegate.

... which is why I made the post to ask "wtf?"

 

[Supra NA-T]

Thats what I put in my post.

Talked to my mechanic. They are going to smoke test it.. just to be sure, however, I think I understand what is happening now.

So.. basics...
7MGTE
Driftmotion (CXRacing) Intercooler - thier "new" one with both pipes on the same side
60-1 CT26 Turbo
HKS 3000 pipe + custom pipe to the fender (2.5" slightly larger diameter than the provided piping)
all hardpipes with silicon connectors, transducer on the turbo (pipe #1) so the turbo is blowing from a slightly smaller pipe into a slightly larger pipe, going through the core and into a slightly larger pipe, so no restrictions until sizewise. It always steps up slightly in size (not ideal, but I really didnt want to dick around with the provided pipes that fit from the fender to the intake seeing as I already had a custom pipe made).

From the explanation...
The turbo is pushing the air to the intercooler core at its rated wastegate pressure of Max 10 psi. Because it is not a larger system, that pressure is actually dropped as it moves through the core and piping (no restrictions like the stock) and as it hits the intake (where the gauge reading is being taken) ther is a pressure drop of 3 psi. Driftmotion (or CXracing, I can't recall) states that I should expect a .5 - 1.5 psi pressure drop with this core, and I just happen to get a 3 psi drop. Therefore, we will check it for leaks just to be sure.

However, what it means is that when I up the boost, the turbo will have to work just a bit harder (not really because there will be less resistance to its actual work), but my efficiency should be better because I will be able to flow more air through the system. This will mean if I set up for 18 psi, the turbo will (theoretically) have to start pushing 21 psi to get that to the intake manifold. This is a little shaky thinking because from my understanding its an exponential thing so that the flow is easier at higher boost. Therefore, my piddly stock boost is just not enough for the system (meaning.. the intercooler is too large for a stock application). It demands a bigger turbo. (thats the basic idea)

You can get too large of an intercooler, but this one is on other 7M vehicles without any discussion so I believe it will work very fine for me at the higher boost levels.

I think I understand now.. funny how this isn't discussed anywhere that I have found so far. (in a simplified way that is).


Good little FAQ site for intercoolers..
http://www.bellintercoolers.com/pages/techFAQ.html#FAQ_2

My only concern is that 3 psi pressure drop is a bit significant as the expected drop should only be .5-1.5. That is very near the max psi drop to tell me the intercooler is too big for my application.

 

[IndigoMKII]

I still think you have a slight boost leak somewhere.

 

[Grandavi]

Quite possible. I have had a bit of bad luck so far with my purchases... Will post again once I get it checked. Still have to put the mount on for the bov and get rid of the stock one

 

[Grandavi]

Just thought I would throw this up. The Driftmotion intercooler (being a CXRacing product I believe) is simply a non-supported distributed item from DM. (for the 7MGTE)

My only real complaint (other than absolutely no directions/suggestions for install) was that the 300 pipe replacement is built for non-integration. Mine was built wrong and bent wrong from what I can tell (see pics). I would have had to remove the AFM and air filter housing to reroute a fitment with the provided pipe, so opted to stay with the custom pipe I had made as well as the HKS 3000 pipe replacement (which is bigger than the piping anyway).

Where the flange is on the pipe is directly above the bov reintegration bung which wont work at all from what I can see and I want the bov reintegrated. Having my own flange mounted on April 3rd.. followed by last dyno, fuel touchup and boost control setup. Should be ready for a fun summer... then I can tint/rustproof/finish the interior.

I figure another 3-15 years and I should be finished working on it...

Oh.. if anyone goes for this setup (the "New 7MGTE Intercooler" from Driftmotion) I made a PDF that shows what goes where with an installation description.

 

[Dan_Gyoba]

I've been thinking about this, but I'm actually happy with the intercoolers that I own. One is a DM sourced Spearco replica. The one on the 1990 that I just picked up is a real Spearco. Can't justify replacing either one, even if I like the CX racing piping.

 

[CyFi6]

View attachment 65954View attachment 65955

Just thought I would throw this up. The Driftmotion intercooler (being a CXRacing product I believe) is simply a non-supported distributed item from DM. (for the 7MGTE)

My only real complaint (other than absolutely no directions/suggestions for install) was that the 300 pipe replacement is built for non-integration. Mine was built wrong and bent wrong from what I can tell (see pics). I would have had to remove the AFM and air filter housing to reroute a fitment with the provided pipe, so opted to stay with the custom pipe I had made as well as the HKS 3000 pipe replacement (which is bigger than the piping anyway).

Where the flange is on the pipe is directly above the bov reintegration bung which wont work at all from what I can see and I want the bov reintegrated. Having my own flange mounted on April 3rd.. followed by last dyno, fuel touchup and boost control setup. Should be ready for a fun summer... then I can tint/rustproof/finish the interior.

I figure another 3-15 years and I should be finished working on it...

Oh.. if anyone goes for this setup (the "New 7MGTE Intercooler" from Driftmotion) I made a PDF that shows what goes where with an installation description.

The kit is far from "bolt on". It isnt as difficult as a completely custom kit, I mean, you dont have to cut or weld any pipes, so it is bolt on in that aspect. But it does require some creativity as far as brackets and routing. To say is is a complete bolt on kit specific for the Supra is a bit misleading. They also assume you have ditched the stock air box. This is how I ended up setting up mine. I found that the small stock BOV recirc hole is too small when you start to up the boost and went with a custom accordion so I could run a large fitting for recirculation.
http://img.photobucket.com/albums/v...ACF5900-3024-000001C481DE4ED8_zpsf7a1fa8d.jpg

 

[HMNGSupraMKIII]

What is some bad things that can occur if you don't recirculate the BOV?

 

[Rollus]

What is some bad things that can occur if you don't recirculate the BOV?

Exhaust flammes and (long term) cat dammage with maf, nothing with a map and standalone or map conversion piggyback (Maft Pro, MapECU)

 

[Insidious Surmiser]

damn... those pipes do NOT line up at all.... I have some with the same lettering on them that I have on my car... they fit nicely :-/

 

[Grandavi]

I think if you have the capability of rebending the pipe mine would have worked, but it may be that they just aren't careful on their bend specs. If I were to do it again, I would still use this intercooler kit, but I would say from the get-go that the pipe would be custom from the intake to the fender and garbage the pipe they send. The thing is.. its easy to get this lined up correctly for the fender hole which is the major point. All they have to do is realign how the build the last 2 pipes and it would be pretty close to plug and play. As well, if the core itself was just about an inch shorter in width it would fit much better too and possibly allow for the overflow reservoir to stay with some minor modification to its bracket. For the money it seems fine.

After driving for a while I am pretty sure I have a leak somewhere because my max boost is dropping over time. Will see what happens on April 3.

 

[Grandavi]

What is some bad things that can occur if you don't recirculate the BOV?

If your running with the AFM the air coming in is monitored. Without the blowoff valve recirculating the air, it vents to atmosphere so the ecu won't know there is less air than what it metered so you will run even richer. Just not proper if your still running the AFM as I understand it.

 

[IndigoMKII]

What is some bad things that can occur if you don't recirculate the BOV?

Boost leak for a brief period after you close the throttle plate from being in positive manifold pressure.

 

[Insidious Surmiser]

massive backfires ^ stumbling

 

[Grandavi]

Yeah pretty sure I have a boost leak now.. my max boost has dropped to 5.1 psi. First time in 5 years that my car has stalled while turning a corner at low idle. Done it 3 times... lol. Cant wait until Wednesday to get the car back up. Amazing how a boost leak can kill performance.. my car feels like it used to as opposed to the rocket ship I used to launch.

 

[IndigoMKII]

Yeah pretty sure I have a boost leak now.. my max boost has dropped to 5.1 psi. First time in 5 years that my car has stalled while turning a corner at low idle. Done it 3 times... lol. Cant wait until Wednesday to get the car back up. Amazing how a boost leak can kill performance.. my car feels like it used to as opposed to the rocket ship I used to launch.

I told you that you had a boost leak, that's why the new IC has such a 'PSI drop' for you.

 

[Grandavi]

Yep I believe you hit it correctly. Makes me feel bad for NA Supra owners... such a huge difference in the drive when your boost falls off like this.. lol.

 

[supraguy@aol]

Sorry to hear about your luck with this unit.
I plan to purchase the same one myself. Good to know about these pitfalls in advance. Once I get mine,
I will let you know if I had the same fitment issues, or if it's a random breakdown in quality control. I'll be using it with a MAFT Pro setup,
so I'm not as worried about the recirc. issue.