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9krpmrx8's Boost Build Thread

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Old 04-04-2011, 09:50 PM
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Originally Posted by RX8Soldier
before this gets messy... Dude, you jumped into someones build thread and started asking questions that aren't the easiest to answer (without enticing other questions).
go to the "Major hosepower upgrades" section of the forums and read the stickies. You'll get your answers there
I apologize for jumping in and causing any trouble but as i said I'm new to this and just went to the first thread i saw, when i put "turbocharged" in search bar, that said boost or anything related in the title. All i was looking for was some help here, just as you politely gave me and i thank you for that. But the other dude didn't have to be a dick about it, that's all I'm saying.
Old 04-04-2011, 09:53 PM
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I wasn't a dick. I typed it up pretty nice. You said bad words, not me. edit: Now delete your posts by clicking the "edit" button and I will delete mine. Keep this thread on track.
Old 04-04-2011, 11:01 PM
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he thought that was being a dick He is in for a load of fun.

No offense Patrick but if you wanna learn, then just read. The info here can be a bit overwhelming (especially turbo stuff) but you just have to read through all the crap to get the good stuff. Asking questions and just expecting people to give you the right answers will get you no where.

For water cooling I am thinking a secondary radiator in one of the factory cooler locations is needed to assist the Koyo (no better than stock really). I have already sourced a unit that should fit in the factory oil cooler location that has a Spal fan on it. The fan will reduce flow through it at speed but overall it should reduce water temps enough. I also plan on replacing my aging factory fans and shroud just to start fresh there. Funny enough on our canyon run on Saturday in 90F weather, one of the guys with the Mazmart water pump and thermostat had significantly higher water temps than me

Now that I think about it I will do the V mount for the intercooler.

Last edited by 9krpmrx8; 04-04-2011 at 11:06 PM.
Old 04-04-2011, 11:41 PM
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I think a big part of the problems people are seeing with there temps is an improperly sealed Rad.

9K I think I have seen that some people are have good results using the stronger 09+ fan motors. It may be something worth looking into. I still have no idea what I will be doing for cooling.
Old 04-05-2011, 02:40 AM
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+1 on the "bout time" comment


https://www.rx8club.com/series-i-aftermarket-performance-modifications-23/cooling-mod-idea-155235/
Old 04-05-2011, 10:10 AM
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I am pretty set on a secondary radiator. Grungepup also had a good idea about modifying the crash bar to move the oil cooler back and mounting the inter-cooler in front of it. So I need to find a crash bar I can play with and see what we can come up with.
Old 04-05-2011, 10:41 AM
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Originally Posted by 9krpmrx8
I am pretty set on a secondary radiator. Grungepup also had a good idea about modifying the crash bar to move the oil cooler back and mounting the inter-cooler in front of it. So I need to find a crash bar I can play with and see what we can come up with.
I plan to ditch the stock crash bar and replace it with a lighter, smaller and probably stronger tube frame bar. That way I can put it where I want with whatever tow hook I want and include mounting holes, or studs for coolers and splitter struts/supports.

Moving the bar back won't help. I would move it forward and up, or more accurately, make it smaller so it blocks less airflow. Of course you will need a modified grill or aftermarket bumper too.
Old 04-05-2011, 10:47 AM
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Btw, ditch the fan for the secondary radiator. You will want optimum air flow at speed not at idle. Plus it greatly reduces the thickness of the cooler you can install. With the small bumper openings on the stock bumper, you will want the thickest cooler you can fit. Probably 3" depending on the fitting location.
Old 04-05-2011, 11:12 AM
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Originally Posted by Highway8
Btw, ditch the fan for the secondary radiator. You will want optimum air flow at speed not at idle. Plus it greatly reduces the thickness of the cooler you can install. With the small bumper openings on the stock bumper, you will want the thickest cooler you can fit. Probably 3" depending on the fitting location.

Yeah there is quite a bit of room in the factory oil cooler locations. The fan will reduce airflow at high speeds but at low speeds under high RPM (when coolant temp is really an issue for me) it will cool better with the Spal. I can always test it.
Old 04-05-2011, 03:10 PM
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Okay so Majestic Turbo says they can "upgrade" the T1618Z to make it more reliable, adding water cooling, etc. I am wondering if going with a better turbo is even worth it for the power level I am seeking. I trust these guys they have done two rebuilds for me previously. I am awaiting some more specific details.
Old 04-05-2011, 03:51 PM
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I haven't heard much info regarding their work.
Old 04-05-2011, 03:56 PM
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Originally Posted by J8635621
I haven't heard much info regarding their work.
Back in the day when I had my Turbonetics T3 rebuilt they were highly recommended and I was actually surprised when I learned they were in Waco of all places. My bosses brother owns the largest diesel repair business in the Dominican Republic and they have bought and dealt with them on turbo balancing equipment. Small world.
Old 04-05-2011, 03:59 PM
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That's good to know. I used to see their turbo 05ish mustang around town. I saw pictures where they pushed the stock block too far lol.
Old 04-05-2011, 04:22 PM
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Originally Posted by J8635621
That's good to know. I used to see their turbo 05ish mustang around town. I saw pictures where they pushed the stock block too far lol.

Yeah I have not heard any bad things about them and I searched a bit. I do remember their names in some magazines from back in the day. I guess we will wait and see what they say.
Old 04-05-2011, 05:01 PM
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Originally Posted by 9krpmrx8
I am pretty set on a secondary radiator. Grungepup also had a good idea about modifying the crash bar to move the oil cooler back and mounting the inter-cooler in front of it. So I need to find a crash bar I can play with and see what we can come up with.
Check with fellow board member "darnellm" about the crash bar, I'm sure it was his car I recall had some interesting things done in the nose for improved cooling.

Last edited by Striker-7; 04-06-2011 at 01:58 PM. Reason: Wrong name used (dang dyslexic memory!)
Old 04-06-2011, 05:50 AM
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Re the crash bar : FYI - JDM models have a smaller one . One member from the States actually bought one in for the same reasons you are wanting to change yours.

Re the upgrade : T04e 50 trim is the way to go for your desired power level
Old 04-06-2011, 06:09 AM
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Have you got pictures of said crash bar Brett?
I'd like to see if it's like the one that the eudm cars have!
Old 04-06-2011, 08:24 AM
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Build your own bar, its a metal bar with a plate. Easy and cheap for any fabricator to make and you can build it to fit your custom needs. You will need a metal buy to build you brackets for the coolers anyways.

You think there is a lot of room for coolers in the oem location, but when you start trying to fit something in there it gets tight. Ditch the fan, you won't overheat at low speeds or low rpm. Try it if you want, but it makes better sense to run an inch thicker cooler then a fan.

Give me a few months and I will have my custom crash bar, maybe In the rear too.

If you give me specs (vs stock) of what you want, I will build one for you too.
Old 04-06-2011, 09:45 AM
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Hmmmm. building a custom crash bar is a good idea.
Old 04-06-2011, 09:49 AM
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for real, you can free up alot of room down there. I got everything mounted up as far as front mount goes. I will have to cut all the plastics away for the piping to the front mount and then its done up there. Until I decide to change the cooling parts
Old 04-06-2011, 09:52 AM
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My father is heavy into offroading and has a lot of buddies who fab sliders, bumpers, etc. I am sure they can recreate the crash bar with mounts for my oil cooler and inter-cooler. I will have to find a crash bar from wrecked 8 and see what they can do with it.
Old 04-06-2011, 02:51 PM
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Originally Posted by bse50
Have you got pictures of said crash bar Brett?
I'd like to see if it's like the one that the eudm cars have!

here is mine . BTW - don't block off the rad like i did here - overheats like this .

Attached Thumbnails 9krpmrx8's Boost Build Thread-intercooler-front.jpg  
Old 04-06-2011, 03:04 PM
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It looks similar to mine but i should double check.
Btw i have the fuel filter packed and ready to ship, it's just that i can't reach the post office without driving
Old 04-06-2011, 03:34 PM
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Hmmm. I wonder just how much a bigger intercooler will really help at the power levels I am trying to hit. Do you think the bigger intercooler really helped?
Old 04-06-2011, 06:02 PM
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not at anything below 300whp - better off with the stock Greddy .


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