Im having trouble deciding what IC setup to go with. Id like to run a backdoor FMIC that way i can keep My HID's in my headlights and foglights.. Foglights are 1-2" longer than OEM's and i have ballast mounted right there.

SO what are the main advantages to a Backdoor vs a Traditional endtank Interrcooler?

Ive heard the debates about the 90* bends for the backdoor can cause compressor surge, Loss of boost pressure, Minor cutting of frame (i dont mind this part)

But it does reduce the amount of piping so wouldnt that help with better response?

Also another question. What do i got to do to put the BOV on the Intercooler? Im going for Nice clean install with The wireless enginebay effect. so i would like to hide alot of stuff. that goes along with the turbo setup.

 

I have wondered this before, so BUMP for some answers! But, I do know that Full-race back door intercoolers come with a BOV fitting on the turbo side. I am sure that Full-Race has a reason why they design it that way

 

One of the obvious cons of a backdoor would be flow restriction, since air doesn't like to change direction 90* in the space of 3 inches. The only reason I'd go with one or the other is if I had some space restriction. The common example is the CRX's w/o ac, due to the radius bar being in the way and the core support having nice places for it to go through.

If you can weld, you should go with a normal fmic, a lip, and snake pipes below the lights.

 

see im confused.. since you are getting rid of a bunch of piping with the backdoor.. wouldnt that make up for the 90* bends?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by HiProfile &raquo;</TD></TR><TR><TD CLASS="quote">One of the obvious cons of a backdoor would be flow restriction, since air doesn't like to change direction 90* in the space of 3 inches. The only reason I'd go with one or the other is if I had some space restriction. The common example is the CRX's w/o ac, due to the radius bar being in the way and the core support having nice places for it to go through.

If you can weld, you should go with a normal fmic, a lip, and snake pipes below the lights.</TD></TR></TABLE>

Of course, backdoor doesn't have to be a 90 degree bend. Thats just one of many designs.

The example you speak of reminds me of the one Tony1 posted awhile back. Its short flowing piping is quite nice. And it isn't 90 bends. I duplicated it with a somewhat narrower fmic and was able to route mandrel 90s into it, nice and smooth. I love it...

As to stuff like the fullrace straight into the intercooler... it is great for lack of piping, which might just counteract that wall it hits.

 

anymore info?

 

to each their own really, traditional style is going to be IMO more restrictive.

backdoor style has a more direct flow on the intake side.
free's up all that intercooler piping that you would have to run on the turbo side
charges air faster

overall a good intercooler is going to be a good choice be it backdoor or regular style.

there are big differences between ebay intercoolers and high end intercoolers

my intercooler kit setup cost around 1100.00

 

were's tony when you need him...

 

ive heard alot of good things about the Ebay Intercoolers.

i dont see what makes them soo different than other intercoolers.

 

Correct me if I'm wrong, but weren't the end tanks designed that way due to the placement of the turbo on a FR manifold? I think all that's required between the compressor outlet and the intercooler is a coupler.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b18sihatch &raquo;</TD></TR><TR><TD CLASS="quote">to each their own really, traditional style is going to be IMO more restrictive.

backdoor style has a more direct flow on the intake side.
free's up all that intercooler piping that you would have to run on the turbo side
charges air faster

overall a good intercooler is going to be a good choice be it backdoor or regular style.

there are big differences between ebay intercoolers and high end intercoolers

my intercooler kit setup cost around 1100.00 </TD></TR></TABLE>

would'nt more intercooler piping cool the air more? as the back door is direct, and hot *** air is pumped to the intercooler directly. Don't know if there would be a big difference in either case.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by drintegra &raquo;</TD></TR><TR><TD CLASS="quote">

would'nt more intercooler piping cool the air more? as the back door is direct, and hot *** air is pumped to the intercooler directly. Don't know if there would be a big difference in either case. </TD></TR></TABLE>

hot air is being pumped in there either way...hence the purpose of an intercooler
i&lt;3 my backdoor

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 92eg6 &raquo;</TD></TR><TR><TD CLASS="quote">

hot air is being pumped in there either way...hence the purpose of an intercooler
i&lt;3 my backdoor </TD></TR></TABLE>

WOW talk about easy access to jacking someones bov..expletive that

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ludesleep &raquo;</TD></TR><TR><TD CLASS="quote">WOW talk about easy access to jacking someones bov..expletive that</TD></TR></TABLE>

Exactly, it's a great setup due to the lack of piping, but for a street car, not a good idea.

 

this is just a fun race car for Track/street

 

more intercooler piping means the air has to travel longer through the intercooler piping through the intercooler and up the intake charge pipe.

backdoor intercoolers shorten the route of the intercooler piping meaning the intercoolers charged air has less of a distance to travel = faster and cooler charged air and can also better spool times, as the air travels faster from the turbo to the intake manifold.

 

Only one charge pipe in my setup...

Hotside

Coldside

 

do you know how much of the air actually flows in the lower half of the IC as opposed to the top half?

since the air is moving so fast, and the turbo is pointed directly ay the lower half of the IC, i wouldnt think the top part (yellow box) is doin much cooling.

i know the entire IC will be pressurized, but i would think the lower portion would be doin ~80% (wild guess) of the cooling
please someone correct me if im wrong, because this is meant as a question, not an insult

to the OP, if i was gonna do a backdorr IC, i would want the front of the ic (if you are standing in the front of the car) to be rounded so the air has a smoother transition as it turns to go into the IC.
like this:


edit: spelling and MS paint owns

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b18sihatch &raquo;</TD></TR><TR><TD CLASS="quote">more intercooler piping means the air has to travel longer through the intercooler piping through the intercooler and up the intake charge pipe.

backdoor intercoolers shorten the route of the intercooler piping meaning the intercoolers charged air has less of a distance to travel = faster and cooler charged air and can also better spool times, as the air travels faster from the turbo to the intake manifold.</TD></TR></TABLE>

it's pressurized, 2-4 feet of piping will not dramatically affect speed, 9psi is 9psi. Remote mounted turbos use the piping from the intake charge. Just a thought.

I would like to see a dyno or temps from a back door and a traditional front mount. I think that is what this thread needs. So somebody who has both intercoolers needs to get on the dyno $$$$$$$$

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Kelly. &raquo;</TD></TR><TR><TD CLASS="quote">do you know how much of the air actually flows in the lower half of the IC as opposed to the top half?

since the air is moving so fast, and the turbo is pointed directly ay the lower half of the IC, i wouldnt think the top part (yellow box) is doin much cooling.

i know the entire IC will be pressurized, but i would think the lower portion would be doin ~80% (wild guess) of the cooling</TD></TR></TABLE>

Well, since it is pressurized it will exand much faster than you would think. Think about wind, there is a pressure difference in the atmosphere between 1-2psi and it can get pretty windy outside because the high pressure area is pushing the pressure to the low areas, causing wind. Like I said, that's only 1-2psi in a LARGE area (miles). Now think of 10-20psi in just that endtank, it'll move that air VERY quickly to the upper part of the core.

 

I think a "back door" style inlet is good because it breaks up the air and helps distribute it evenly through the core. A traditional style outlet that flows well is also best in my opinion. Just my opinion though...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Kelly. &raquo;</TD></TR><TR><TD CLASS="quote">do you know how much of the air actually flows in the lower half of the IC as opposed to the top half?

since the air is moving so fast, and the turbo is pointed directly ay the lower half of the IC, i wouldnt think the top part (yellow box) is doin much cooling.

i know the entire IC will be pressurized, but i would think the lower portion would be doin ~80% (wild guess) of the cooling
please someone correct me if im wrong, because this is meant as a question, not an insult
</TD></TR></TABLE>


One thing I have noticed about aluminum is that it transfers heat very quickly. if you hold a torch onto it, it takes a long *** time to heat one spot up because it spreads so quick. Just an observation of mine.

 

the fr backdoor also helps w/surge w/the bov on th ic as the thread creator mentioned.....a friend of mine had that problem last season until he got his frbackdoor

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tony1 &raquo;</TD></TR><TR><TD CLASS="quote">I think a "back door" style inlet is good because it breaks up the air and helps distribute it evenly through the core. A traditional style outlet that flows well is also best in my opinion. Just my opinion though...</TD></TR></TABLE>

meaning what i described happens to a certain extent ?

 

And my newest one...