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Old 03-24-2011, 12:35 AM   #1
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2.5 turbo tj project.

After dropping a skirt on a piston and beating it all day at Rausch I decided its time to do a Turbo build. Just finished motor build. Been compiling parts thru winter. Ready to mock up and Fab exhaust this week. Specs. To4e, external wastegate 7 lb spring, intercooler, eBay bov, 36#svo injectors, and Splitsecond ftc1-019b fuel / timing control with 2 bar map being ordered in a week. Motor goes in this weekend. Getting closer every day to completion.

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Old 03-24-2011, 12:56 AM   #2
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put pics up when its done

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Old 03-24-2011, 01:15 AM   #3
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Sounds like this Motor build might be Awesome..

Post pics ASAP.. :]
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Old 03-24-2011, 01:29 AM   #4
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More details, please!
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Old 04-26-2011, 06:06 AM   #5
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Well, work is keeping me very busy and it seems every time I have an opportunity to work on the pile its pouring rain... exhaust is almost done. The only thing I haven't bought is the Splitsecond. Play money has been tight, every time I squirrel away enough something happens. Oh well. The weather is nice and I'm itching to go wheelin.
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Old 04-26-2011, 06:16 AM   #6
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Mo pics. Progress is glacial at best but that's entirely my fault. If I had a garage not full of stuff and an actual budget it would have gone quicker. No rush.
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Old 04-26-2011, 06:32 AM   #7
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As you can see, no intercooler, seems pointless for my application as its a woods machine, I doubt an intercooler will be efficient covered in mud and crawling at 2 MPH. Water /Methanol injection is the new plan but I want to get it setup without for now. Exhaust has changed a couple times to provide clearance to other components for field serviceability ( I break stuff on the trail ) and full suspension articulation. Ive gotten an hour or two a week for the past two months and progress is painfully slow. Work and family first. My boy drove this bad machine over Easter weekend. Full cage, flatfenders, lights, winch, I was jealous ...I was too big to ride this ride :-( ...
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Old 04-27-2011, 09:22 PM   #8
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Finished exhaust.
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Old 04-27-2011, 09:55 PM   #9
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Im not sure of the specs,I know a guy who did this to his TJ and it rips .havent talked to him in a while .
did you beef up the bottom end at all? he said he used 6banger rods ,is this possible?
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Old 04-28-2011, 06:04 AM   #10
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I dropped a skirt off the rear most piston at Rausch. That's how this mess started.
Basically a stock rebuild. New set of Hyperutectics, fresh bearings, rings. Nuthin fancy.
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Old 04-28-2011, 10:38 PM   #11
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Exhaust welded. Ready to clean up some of the welds, few coats of hi temp paint and wrap it all.
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Old 04-28-2011, 10:45 PM   #12
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Here's a local guys carburated 4.2 yj with turbo woods machine . He was just wrapping up little details when I took these pics. I'm told its been out wheelin since then and works well. Love the wastegate dump above the fender.
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Old 05-04-2011, 06:56 PM   #13
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Here it is. No Splitsecond yet gotta raise some play money without the wife's knowledge. 36 lb injectors are instantly flooding it. Gonna swap in the stock ones just to hear it run. Once the computer gets here tuning begins.
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Old 05-13-2011, 01:41 PM   #14
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Off a tooth on distributor ...doh! Runs OK with 36s. Splitsecond ftc ordered. Couple easy spins around the neighborhood staying out of boost as much as possible ....you can feel the difference, incredible. Can't wait till its tuned properly.
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Old 05-13-2011, 05:17 PM   #15
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what was the total cost not including the new piston?
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Old 05-15-2011, 09:53 PM   #16
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hey can you tell me the part numbers, of the fuel injectors, the controllers, the ar ratio of the turbo and the type, and anything else, i have a 2.5 and was thinking of useing the msd fuel pump booster and boost controller, whats you opinion?
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Old 05-15-2011, 11:18 PM   #17
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ok just saw the specs, my apologies. Now if im doing my math right, dont you need just 24# injectors for 7-11 pounds of boost?
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Old 05-18-2011, 07:16 PM   #18
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Running a Splitsecond ftc1-019b to run fuel and timing. Some guys use 24s - 30s - or 36#. These were laying around my buddies shop. There from a SVO mustang 2.3 Turbo so I figured they'd work. Splitsecond says there fine. Just got the ftc hooked up and its a snap to install....gigantic pain for a dummy like me to tune, I have sought help and progress is glacial at best. Really wish I had a complete map for all rpm ranges as a baseline instead its a barometric map to make it run and the rest of the cells are same at all rpms.
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Old 05-18-2011, 07:51 PM   #19
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Iirc svo injectors used a diffferent impedence didn't they? Could you possibly go with a vam setup much like the svo did?
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Old 05-19-2011, 06:23 AM   #20
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Runs n drives with em. Not sure about impedance ,remember looking into it. After last nights tuning session we decided to hook up fuel pressure guage for real-time reading ....dropping under load and more under boost. Like to 25#. I have fuel delivery issues.
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Old 05-19-2011, 09:06 AM   #21
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Get a 255 walboro pump. If you are still using the stock pump it won't feed those injectors.
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Old 05-20-2011, 12:05 PM   #22
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Pump replaced. Now everything is super rich. Holding 50 psi all loads. My baseline fuel map is not right. Have no real starting point. Seeking professional help. Dyno tuning. Good shop about 2 miles away. I just don't feel comfortable and am not experienced enough and would rather not hurt anything.
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Old 05-31-2011, 12:34 PM   #23
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Stykthyn you're dead right. Low impedance Injectors .....sourcing new ones.
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Old 05-31-2011, 03:49 PM   #24
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I replied to your pm, but I will reply what I know here as well in case it helps anyone using the search function and if I am wrong on any of this someone please feel free to correct me.

The SVO/Turbocoupe used 30lb low impedence injectors. The difference between low/high impedence is the size of the coil windings used inside the injector to determine power draw and pulse width. The ECU's internal injector driver is what determines what injector style you can run. With that said I have heard there is a black box you can run that will allow you to run low impedence injectors with an ECU set up for a high impedence driver, but I have never seen one.

If this is a junkyard buildand you are scrounging for injectors look for ford supercoupes. 30# red top were 89-93 with the series one blower 94-95 series 2 blower came with dk blue which are 36#.
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Old 06-19-2011, 07:44 PM   #25
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Ordered 36# high imp. Flow matched. New style Injectors e10 ethanol compatible with plug adapters.. got a rich tune in it right now took it on a shakedown wheelin run locally. Great power and its not even fully tuned. Put it on its side ...again LOL.
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Old 06-20-2011, 11:48 AM   #26
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Nice pics! Does the turbo make it easier to turn those tires.
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Old 06-20-2011, 12:26 PM   #27
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post a video please please please
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Old 06-21-2011, 12:30 AM   #28
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Will do with the video, next trip. Those are 34 ltbs but swampers run small, there actually smaller than some 33s . Its got 4:56s and now it seems just a bit too low geared. It'll be great at Rausch creek .still looking for the next set of tires, 35 or 36" and comp cut the tub and highline mod the front. I'm split between a ax15 conversion or an aw4, the ax5 can't possibly last much longer after 3 years of bludgeoning it to death and running chocolate milk in it half of that time it still shifts fine and seems OK but I gotta have the replacement on standby. Got a 15 waiting . Once I address the beat and now totally outta balance cv rear driveshaft and leaking rear pinion and cover on the rear I'll try n get some footage of it in its natural environment. It does make some great music .
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Old 06-21-2011, 03:21 PM   #29
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Would you say this is a better alternative than droppingin a 4 liter or v8?
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Old 06-21-2011, 03:44 PM   #30
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Honestly I think an intercooler would be beneficial to you... Giving yourself ALOT more room for error..

I spent a few years in the WRX world and an intercooler makes a world of difference, especially in longevity. Sucking in hot hot hot hot hot air is asking for bad bad bad news, your computer is gonna dump as much fuel as possible into those cylinders to compensate, did I say the air your turbo is pumping is going to be HOT?

Cooler air is more dense, which = more oxygen for a cleaner burn, even at idle or crawl speeds...

My WRX made 380hp, taking your hand and placing it on the hot side then the cool side is shocking because it really is COLD. After a hard run the hot pipe is HOT, and the cool pipe has condensation developing on it.. Cold air is your very best friend when it comes to forced induction, high octane fuel as well...

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