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Old 12-09-2015, 08:14 AM   #1
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Twin Turbo ideas and help

I've recently gotten the idea to twin turbo my 14 3.7. I've done a lot of research and have got a fairly solid idea on how to do this. I know i will have to fab up some headers and mount the turbos and then get a intercooler made or find a prebuilt one. And then route the exhaust back to the rear of the car. And all that stuff. But has anyone done this before? I'm needing to know what's the best turbo with best bang for your buck in mind. I've looked at On3 stuff and like their gt35 turbos. I have thought of using 2 and on3 44mm waste gate/bov they have as well. Also I've seen some boosted gt's that have the mass air sensor in the intercooler, would that be a good idea on my 3.7? What size injectors would also be good? And I know I'll have most likely have to use a fuel voltage increaser. I just want to build a budget friendly (cheap as possible with it still being very good quality) I'll spend money where it's needed but would like to save as much as I can. I don't want to spend 5k on a bolt on pro charger kit when I can fab up my own kit for most likely cheaper and that way it would be the way I want it not a universal kit. I'd like to be running 7-8psi of boost and somewhere in the neighborhood of 450-525ish on rear wheel hp. I've seen some YouTube videos on turbo 3.7's but they didn't list details on building one. I'd also be up for a single turbo designs if I can find a good design and plan of attack.
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Old 12-09-2015, 08:42 AM   #2
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You're going to spend much more than $5k to do this properly, trust me. Two quality turbos alone should cost you in the neighborhood of $3k. I see a lot of things i could comment on, but my biggest concern would be expecting 1.85L to spool a 35R with any sort of proficiency.

Other things to consider:
How are you going to get oil to the turbos?
How are you going to have oil drain from the turbos? You will need to modify the oil pan for this.
What are you using for boost control? An electronic boost control solenoid, a manual boost controller?
Who is going to tune it?
Do you understand why the other boosted applications move to a blow-through set up (MAF in the charge pipes).

I don't want to sound like a condescending ***, but i apologize as there's just no other way to say this. You have a lot more homework to do than just simply fitting turbos and exhaust into the engine bay.
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Old 12-09-2015, 09:03 AM   #3
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I understand that lol it's hard to fully explain all of my thoughts into text lol but I've really researched the single idea and like it a lot. But it's cool as s*** to say twin turbo. But I have thought of oil drain. I thought of drilling the pan and taping it for the oil lines. I was thinking of using aems electronic boost controller. And yes there is a local tuneing shop that can tune it for me. I've bout decided to just do the single idea. The only part I'm kinda unsure about is the cross over from one side to the other to turn the turbo.
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Old 12-09-2015, 10:05 AM   #4
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I personally prefer singles and think that may be easier to manage. Good luck.
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Old 12-09-2015, 10:08 AM   #5
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I will start to assemble parts and whatnot soon. When I start building I will make a thread about it
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Old 12-09-2015, 12:21 PM   #6
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Start here if you haven't already. Boss 227 Build Thread
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Old 12-09-2015, 04:10 PM   #7
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Someone on this site did a custom twin turbo build and recently had it for sale in the classifieds. I believe his build thread is still up from a year or two ago.


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Old 12-09-2015, 06:59 PM   #8
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I have JMPs twin turbo kit Click image for larger version

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And Alrefire just bought a twin set up from JMP also


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Old 12-09-2015, 07:16 PM   #9
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Where can you get the JMP kit?
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Old 12-09-2015, 09:42 PM   #10
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Here's the link to their Facebook page

https://www.facebook.com/jmpturbo/

Jack should be able to answer any question you may have


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Old 12-10-2015, 01:08 PM   #11
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3.7 TWIN TURBO BUILD

this is the build thread of the guys custom twin turbo kit. I really liked what he did but theres a lot of work to get it done.
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Old 12-10-2015, 01:15 PM   #12
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Just buy the kit. If you think its too expensive stay NA or go Nitrous. You'll spend way more money than the JMP kit trying to jury rig something in there yourself unless you have a ton of skill and experience working on cars.
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Old 12-10-2015, 01:49 PM   #13
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I found thier Facebook page but where do you buy the kit at?
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Old 12-10-2015, 02:47 PM   #14
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Quote:
Originally Posted by Acaudill23 View Post
I found thier Facebook page but where do you buy the kit at?

You have to send them a message
They have 2 different style kits. One like mine and one with the turbos hidden in the bumper

Message them and jack should reply pretty quickly. What's your name? I'll let him know you're interested in more info and will be contacting him

I think their site is being reworked or something


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Old 12-10-2015, 03:27 PM   #15
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What would be a good size turbo to run twins on my car?
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Old 12-10-2015, 03:49 PM   #16
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I'm running 59 mm precisions


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Old 12-11-2015, 07:51 AM   #17
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Twin precision 5558 with a .82 AR would be nice. I'm used to turbo 4 cylinders, but half a 3.7 is 1.85 so its close enough. I prefer response over all out power, but there's no point in going too small either. Or if they have Garrett Turbos twin GTx3071s wouldnt be bad either.
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