Hey all, I was thinking that this would be a pretty good/cheap idea for my turbo project. I would be setting it up like BlueTII as an H-Mount, but with the core runnig the other direction.

 

Well for thoughts on just welding them together try the here https://www.rx7club.com/forum/search...by=&sortorder=

- Steiner

 

There was a guy at SS6 who had a red 'vert he had converted to turbo. He had two stock ICs welded together and set as an FMIC. He said it was a fair amount of work, but it worked just fine.

 

ive never heard of anyone doing that before.... real cool

 

anyone have pics of that?

 

BamBam7 did that on his turbo-NA car. I don't know if he made any formal measurements of performance though. Seems like it would be reasonably efficient, since the stock TII intercoolers definitly don't suck.

 

Running intercoolers in series (inline) doubles the pressure drop of the intercoolers, which means that the turbo must work harder (and therefore create more heat) to produce the same amount of boost in the manifold. Running the intercoolers parallel lessens the pressure drop, but requires more plumbing.

I suggest using a larger intercooler instead because that way you don't need to worry about welding and leaks. You can get a used NPR intercooler for $100-300.

 

There is a guy on ebay who custom builds intercoolers for $200-$300 and they are a damn sight more efficient than the stock intercooler... I would go that route.

 

As I stated before, I will be running a H-mount set up like BlueTII.

He is running an NPR intercooler, and I wanted the stock one coz I could set it up with less pressure loss. After reading Maximum Boost, and Turbochargers, I found that if the air could take a shorter trip the the core it would have less pressure drop, but would have the same thermal efficincy as one of the same size.
I did a really crappy job of explaining that, but hopefully everyone understands.
Evil anymore thoughts on this?

 

I like that . it looks cool 2

 

My thoughts are that I seriously doubt that two stock IC's rigged together will have less pressure drop and/or higher efficiency than the NPR intercooler. However, I don't see anything wrong with trying it out to see how it works. Both of those books will tell you how to test the pressure drop and efficiency. Also, be sure to re-read the Maximum Boost book reference series intercoolers and long intercoolers vs. tall intercoolers like the NPR. Your "shorter trip" theory will help throttle response, but may or may not help pressure drop because pressure drop is more dependant upon the bends than it is on the length of the tubing. The H-setup in the picture looks good because it appears to have only about 100-110degress worth of bends. The sharp bend off the turbo isn't so great, but I don't see any way to fix it. In my experience, a "perfect" intercooler design would never fit in the car, lol.

 

mine too . a friend of mine had 3 stock ic's welded together on his fd (triple stage) and it worked great, by the time the air gets to stage 3 its cold. i dunno about pressure drop though we never checked

mike

 

whats npr's website?

 

NPR are intercoolers out of Izuzu(sp don't really car) NPR delivery trucks, they are disel turbo's.

 

https://www.rx7club.com/forum/search...der=descending

Also check Ebay, etc.

 

did finally someone find pictures of stock 2 or 3 welded together and mounted?

 

does enough air flow through that H-mount intercooler, or do you have to do some modding to get it there?

 

You have to have a Intake for is in the front and a Vented hood for it to work, its not a really simple set-up.

 

I've never seen a third gen with a vented hood for their H-Mount, nor a special intake...

 

I'm using two together.
I woudl have preferred to have the parallel, but I mounted it directly in front of the radiator, and the thickness would have been prohbitive.
I don't have any pics of it, but I can tell you that it works AWESOME. On a warm day I can thrash the car, pull over and I can't even touch the turbo outlet pipe it's so hot, but the upper IC pipe is barely over ambient.
Also, the plumbing is really short, since it is mounted in the engine comatrment, right in front of the relcotaed radiator, and the inlet and outel are on the same side (since on the NA, the turbo outlet, and throttle body intake are also on the same side!) I doubt I have more than 3 feet of IC piping... 2 90 degree bends though...
Haivng the big IC core does contribute to about a 1/4 to .5 seconds more turbo lag too.....

 

http://www.npr.org/

 

That is because most FD's have V-Mounts, that allow the heat to exit through the trans tunnel. With the intercooler mounted horizontaly it is hard to have air flow through the core, and then exit through the trans tunnel. This would make the air flowing through the intercooler make a 90degree turn, not good for air flow.
Check out blue TII's set-up. HERE
And this is how I want to weld the inter coolers together. Intercooelr Drawing

 

ok, we got them welded

first unit goes to SA (together with S5 13BT) and if everything will work out, we are going to make another for FC

http://rx7cz.net/photos/fmic/

 

though I dont have any pics I am using a conquest/starion core with its tanks cut off and 2 STOCK T2 intercooler endtanks welded on to it. I used the outlet side od 2 stock ICS so that the inlet and outlet aim straight back towards the engine. I also positioned it up higher than most due and cut a rectangle hole in the upper part of the front bumper for it. This way it doesnt restrict as much airflow to the rad/oil cooler.

 

hiGGI is your site down or what? I just noticed your post and really want to see the pics.