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Old 12-27-2012, 08:35 PM   #1
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Default Intercooler upgrade

Anyone have a "best fit" size turbo intercooler to upgrade to. I have the OEM intercooler piping but no intercooler. Will be running low boost (<15psi).
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Old 12-27-2012, 08:46 PM   #2
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Most definitely need more info, guy.
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Old 12-27-2012, 09:25 PM   #3
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I am assuming you have an MSM because you have OEM piping. Any ebay intercooler would be fine. CX racing is popular. I have a mishimoto intercooler on my MSM.
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Old 12-27-2012, 09:33 PM   #4
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look inside....

this is good:


this is bad:


As for sizing and style, see my thread:
https://www.miataturbo.net/diy-turbo...iciency-69520/

There are many more like it, some much better, but that's a start.
Lots of info out there, just search for it.
Attached Thumbnails
Intercooler upgrade-ets%2520inside.jpg   Intercooler upgrade-intercooler005.jpg  
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Old 12-27-2012, 10:44 PM   #5
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Quote:
Originally Posted by Oochi View Post
Most definitely need more info, guy.
04 Miata with MSM turbo; most of the MSM stock piping is 54mm (2.125"); AC and PS; will run about 10psi boost. MS3 fuel management.

Looking to eliminate fitment problems before I have to contend with fitment problems.
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Old 12-27-2012, 11:09 PM   #6
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[QUOTE=18psi;962957]look inside....

this is good:


this is bad:


Looking inside, the top pic has a lot more bars & plates. I assume this is the good point.

Also, I read your thread; very good. I was leaning towards the longer, less height (28 x 5.5 x 2.5) also, rather than the shorter, taller (18 x 12 x 2.5) like the OEM intercooler. The 28 x 5.5 x 2.5 looks like it would get more direct airflow.
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Old 12-27-2012, 11:18 PM   #7
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It is not ideal. After talking to a few folks more knowledgeable than myself about these things I concluded that more height than 5.5 is needed. Just because that size "fits the mouth" the best doesn't really make it the best.

What you want is as many turbulators as possible. Also pay attention to how they're positioned inside: the "straight" ones wont be as efficient than the ones criss-crossing all the time. You want as much air to hit as many of those and dissipate heat through them and into the tubes/outside as possible. Exchange heat if you will. If they go through a core with all straight fins like the ebay one, its not as effective.

Now, is that a deal breaker? Probably not. Esp since you're running a very low power setup on low boost. But there is a difference.

You want something taller, like 28x7x2.5 or even taller. Also I decided I liked bar/plate over tube/fin because its stronger and can take more abuse. Most also prefer it and claim it superior over tube/fin. Although the tube/fin or "deltafin" ones will let more air flow through them and get to the radiator easier. Its a tradeoff between iat's and airflow to the radiator. If you have proper ducting/shrouding, airflow shoudln't be a problem anyway.
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Old 12-28-2012, 12:02 AM   #8
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Quote:
Originally Posted by 18psi View Post
It is not ideal. After talking to a few folks more knowledgeable than myself about these things I concluded that more height than 5.5 is needed. Just because that size "fits the mouth" the best doesn't really make it the best.

What you want is as many turbulators as possible. Also pay attention to how they're positioned inside: the "straight" ones wont be as efficient than the ones criss-crossing all the time. You want as much air to hit as many of those and dissipate heat through them and into the tubes/outside as possible. Exchange heat if you will. If they go through a core with all straight fins like the ebay one, its not as effective.

Now, is that a deal breaker? Probably not. Esp since you're running a very low power setup on low boost. But there is a difference.

You want something taller, like 28x7x2.5 or even taller. Also I decided I liked bar/plate over tube/fin because its stronger and can take more abuse. Most also prefer it and claim it superior over tube/fin. Although the tube/fin or "deltafin" ones will let more air flow through them and get to the radiator easier. Its a tradeoff between iat's and airflow to the radiator. If you have proper ducting/shrouding, airflow shoudln't be a problem anyway.
I've been doing a lot of reading on this subject the last couple of days and your reply seems to agree with just about all. The BP vs. FT seems to be a toss-up; efficiency being dependent on the turbulators. Most of the "hardcores" still prefer the B&P. Project_gs has a Godspeed for cheap.
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Old 12-28-2012, 09:17 AM   #9
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Stock v Begi intercooler




Bumper back on

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Intercooler upgrade-lee04vr-15195-albums-msm-581-picture-msm-ic-v-begi-3007.jpg   Intercooler upgrade-lee04vr-15195-albums-msm-581-picture-begi-ic-installed-3008.jpg  
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Old 12-28-2012, 10:12 AM   #10
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why are all of them so offset? ugh, that bothers me to no end.
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Old 12-28-2012, 10:15 AM   #11
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Because they don't measure apparently.
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Old 12-28-2012, 10:16 AM   #12
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Yeah I know, the inlet endtank is bigger than the outlet to allow for a plate that diverts some of the airflow to the top of the core.
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Old 12-28-2012, 10:25 AM   #13
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form > function, right 18psi?
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Old 12-28-2012, 10:27 AM   #14
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Quote:
Originally Posted by Lee04vr View Post
Yeah I know, the inlet endtank is bigger than the outlet to allow for a plate that diverts some of the airflow to the top of the core.
I'm guessing you're right about that. It looks like BeGi put some thought in their design.
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Old 12-28-2012, 10:32 AM   #15
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I looked inside it before I installed it, but I didn't take a picture.
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Old 12-28-2012, 10:36 AM   #16
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Quote:
Originally Posted by Braineack View Post
form > function, right 18psi?
daddy gotta look fly while flying
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Old 12-28-2012, 10:40 AM   #17
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Quote:
Originally Posted by 18psi View Post
why are all of them so offset? ugh, that bothers me to no end.
Begi offsets the intercoolers to fit with AC. So like says it is a function > form thing. If you called and told them that you do not have AC they would probably make you one that is centered.
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Old 12-28-2012, 10:47 AM   #18
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yeah yeah I know. Except on the 01+ there is no a/c stuff there to worry about. So I plan to "re-center" mine
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Old 12-28-2012, 10:49 AM   #19
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Im pretty sure they also do the endplates that way for air to flow better through the core AND to "seal" the mouth and force all air through the IC core.
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Old 12-28-2012, 11:33 PM   #20
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The ebay 28x7x2.5 from ilovetacotaco (yeah, I know, but that's the seller's ID) would work fine for you. It's the one that I have in my car. Tube & fin for greater airflow to the radiator. I wouldn't be concerned with relative strength differences between bar&plate and tube&fin intercoolers. At $67 shipped, buy two and consider it a wear item protecting your expensive radiator from rock chips.

Available in black for those who prefer not to advertise.

Pics of my intercooler install in this thread. I used the same routing that the MSM does. Edit: should not be difficult to figure out what adapters you need to make best use of the piping you currently have. I believe you will have to trim the intercooler outlet piping quite a bit.
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