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Old 12-27-2007, 03:17 PM   #1 (permalink)
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SRT-4 TJ Wrangler?

This is NOT my plans but it is my idea, just an idea for some of the guys with the less than powerful 03-06 Wrangler SE. Looking for input and flamers to test the feasibility of this on paper, before attempting any sort of build. Sorry if it's a little lengthy.


The 03-06 Wrangler SE and PT Cruiser have the same engine, the DOHC 2.4L 4 cyl.
Look at this:

http://www.motortrend.com/cars/2005/...pecifications/

2005 Jeep Wrangler SE Utility Performance & Efficiency Standard Features
- 2, 429 cc 2.4 liters in-line 4 front engine with 88 mm bore, 101 mm stroke, 9.5 compression ratio, double overhead cam and four valves per cylinder
- Unleaded fuel 87
- Fuel economy EPA highway (mpg): 21 and EPA city (mpg): 18
- Multi-point injection fuel system
- 19 gallon main unleaded fuel tank
- Heavy duty alternator
- Power: 110 kW , 147 HP SAE @ 5, 200 rpm; 165 ft lb , 224 Nm @ 4, 000 rpm

http://www.motortrend.com/cars/2005/...pecifications/

2005 Chrysler PT Cruiser Performance & Efficiency Standard Features
- 2, 429 cc 2.4 liters in-line 4 front engine with 87.5 mm bore, 101 mm stroke, 9.5 compression ratio, double overhead cam and four valves per cylinder EDZ
- Unleaded fuel 87
- Fuel economy EPA highway (mpg): 29 and EPA city (mpg): 22
- Multi-point injection fuel system
- 15.1 gallon main unleaded fuel tank
- Power: 112 kW , 150 HP SAE @ 5, 100 rpm; 165 ft lb , 220 Nm @ 4, 000 rpm

http://www.motortrend.com/cars/2005/...pecifications/

2005 Chrysler PT Cruiser GT Wagon Performance & Efficiency Standard Features
- Turbo compressor
- 2,429 cc 2.4 liters in-line 4 front engine with 87.5 mm bore, 101 mm stroke, 8.1 compression ratio, double overhead cam and four valves per cylinder EDV
- Premium unleaded fuel 93
- Fuel economy EPA highway (mpg): 27 and EPA city (mpg): 21
- Multi-point injection fuel system
- 15.1 gallon main premium unleaded fuel tank
- Heavy duty alternator
- Power: 164 kW , 220 HP SAE @ 5,100 rpm; 245 ft lb , 332 Nm @ 2,800 rpm

http://www.motortrend.com/cars/2005/...pecifications/

2005 Dodge SRT-4 Performance & Efficiency Standard Features
- Turbo compressor
- 2, 429 cc 2.4 liters in-line 4 front engine with 87.5 mm bore, 101 mm stroke, 8.1 compression ratio, double overhead cam and four valves per cylinder EDV
- Premium unleaded fuel 91
- Fuel economy EPA highway (mpg): 30 and EPA city (mpg): 22
- Multi-point injection fuel system
- 12.4 gallon main premium unleaded fuel tank
- Power: 172 kW , 230 HP SAE @ 5, 300 rpm; 250 ft lb , 339 Nm @ 2, 200 rpm

The difference between the 2.4 n/a and 2.4 turbo is Dodge replaced the internals with low comperssion pistons, forged crank and rods, turbo cams, beefed up fuel system, and ignition, turbo exhaust manifold, intercooler, turbo, ect. If you decided to buy a turbo kit for a stock 2003-2006 Wrangler SE, all the stuff you would have to do to it to make it work, and work well, Dodge has already done, including the all important ECU program. I've found examples of both GT Cruiser and 2.4L turbo engines, transmissions, ecu, wiring harness, and intercooler going for around $1,600, and about 35,000 miles, on Ebay. Turbo kits generally start around $4K, plus the cost of the internals and such.
But this will only work if:
1) The block is the same externally, engine mounts may be in different locations, because one is used as a FWD and the other RWD/4X4. If so, gut the blocks and swap everything
2) Transmissions: The GT Turbo was offered in both manual and auto, If you are swapping into an Automatic Wrangler the ECU will need to be reprogramed for the Wranglers auto. If swapping into a manual, no reprograming is necessary.
3) The bell housing from the SE trans should fit to the 2.4t, depending on 1). I do not know which bell housing will attach the 2.4t to the Rubicon trans if any w/o being modified or custom made. It all depends on if the SE shares the same trans as a Sport or Sahara, and if the Sport/Sahara trans have the same bolt pattern as the Rubicon.
4) The SRT4 and GT Cruiser have a few differences, the SRT4's intake manifold is a different design, instead of wrapping over the top of the engine like the PT Cruiser and Wrangler, it comes down and back towards the transmission. I don't know if that will work in the Wrangler. I believe the manifold could be the 10hp difference between the GT Cruiser and SRT4.
5) The exhaust, Turbo's require 3" exhaust, a custom piece from the manifold to the cat would have to be made, and you could tie it into any 3" after market cat-back for a Wrangler.
6) The turbo piping to the intercooler will have to be custom made, and the intercooler, well you can get creative where you put it, you have several options, remember, the engine bay has ALOT more room than someone with a 4.0, you have 2 less cylinders. Use the extra space to your advantage. If you are worried about the extra heat while offroading, look into water/methanol injection, and intercooler sprayers. They make intercooler sprayers in 3 different methods: water, nitrous, and CO2. Look up CryO2 for the CO2 sprayer, they have a few other tricks too.
I'm not saying it's the best method for offroading, but it can be made to work, and well, if you can adapt your driving style to make it work. It's definitely one you aren't going to see often.
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Old 12-27-2007, 08:17 PM   #2 (permalink)
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I would love to see someone do this with a TJ and report back with trail results.
The old saying, "There is no replacement for displacement", can on ly go so far. Older non -turbo diesels can't shake a stick at the more efficient power plants that are found in today's full size haulers.

My old 150K+ 2.5L would give up the ghost with even the mention of forced induction. Oops
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Old 12-27-2007, 08:22 PM   #3 (permalink)
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I thought about this when they came out with the new motor in the TJ. Seems like it would be a good idea. As I have no plans to purchase another TJ I would be very interested to see someone do this and report back. I am betting it would outperform my 4.0L on the highway. It might lack some low end grunt, but eh, thats what gears are for.
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Old 12-27-2007, 09:00 PM   #4 (permalink)
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I say do it!!

the torque delivery of the engine is good at idle and will give you the hit at higher RPM when needed
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Old 12-27-2007, 09:00 PM   #5 (permalink)
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I like the idea because of the HUGE after market support that the SRT4 Neon has engine wise, especially from Mopar, stage 3 performance upgrade bumps you up to 310 hp at 5600 rpm and 325 ft.-lbs. of torque at 3200–4800 rpm on pump gas and 355 hp at 5200 rpm and 365 ft.-lbs. of torque at 3200–4800 rpm on a special tune for race fuel(I'd make it flex fuel and substitute race fuel for E85).
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Old 12-28-2007, 12:35 PM   #6 (permalink)
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I think someone already bolted the turbo equipment off of the SRT4 to his 2.4L Wrangler engine. I think he's pushing 300HP. I will try to find the link...

Last edited by G33K; 12-28-2007 at 12:37 PM.
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Old 12-28-2007, 12:44 PM   #7 (permalink)
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How reliable is the 4cyl pushing 300hp with forced induction though?
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Old 12-28-2007, 12:53 PM   #8 (permalink)
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How reliable is the 4cyl pushing 300hp with forced induction though?
you just need to build a bottom end to take it, forged pistons, run around 8:1 Compression, no more then 8.5:1 and the engines are good. If it was a stock bottom end for a N/A motor, run no more then 6 psi of boost to avoid breaking.
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Old 12-28-2007, 03:40 PM   #9 (permalink)
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Replying so I can find this post again...

Interesting ideas: I have given this considerable thought too...
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Old 12-28-2007, 08:52 PM   #10 (permalink)
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Got this response on Jeepforum.com

Quote:
Originally Posted by Air Sierra
Nice Idea....
I decided not to swap the complete PT engine due to a couple of items..I could not find anybody to rewire the stock jeep harness to match the PT Computer to get everything to work perfect. there are some minor difference with the PT block, Motor mount attach points are different, Not a big deal you can make some to work. But the biggest problem was the accessories are in completely different spots which were making it a problem for hook up, Power steering location from one motor to the other, timing sensor was in a different spot.

I will make another post on this in a couple hours when I'm down with work and explain all the different reason I did not swap the engine...Don't get me wrong it can be down but not in a bolt in weekend....

Be back in a bit....




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Old 12-28-2007, 10:33 PM   #11 (permalink)
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How reliable is the 4cyl pushing 300hp with forced induction though?
I have an '05 SRT-4 ACR (American Club Racer) and installed the Stage 3 turbo after having the Manifold ported, upgraded to a larger FMIC, ported Throttle body and a 3" Turbo back exhaust. My car has dyno'd 400HP to the wheels in High Octane Mode. Sht Stage 3 if ordered with "Toys" includes an IC sprayer, 4 levels of boost control, and a special High octane mode, that needs at least 100 Octane fuel, but adds another 30 or so HP at the touch of a button. With slicks, I have run a best of 11.50 in the quarter. On street tires in HOM and The dial a boost maxed, there is no traction in the first 3 gears. In non HOM mode it will spin the tires at the top of 2nd gear every time. Oh yeah, my wife drives it every day in the summer and it gets 30 MPG on the highway.

There are quite a few Stage 3 SRT-4s nearing 100K miles with no problems. The stock SRT-4 short block has proven itself reliable up to 500 WHP with big aftermarket turbos and such. Check out SRTFORUMS.COM. There is a HUGE following, and tons of factory and aftermarket support.

Another advantage of the stage 3 is with its TiAl wheel and relatively small compressor, there is virtually NO turbo lag. This would be a killer engine in a Jeep. Especially in the sand And the 2.4 has good torque off boost, so with the right gearing, it would be good on the rocks as well
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Old 12-29-2007, 10:10 AM   #12 (permalink)
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Originally Posted by Murfman1967 View Post
I have an '05 SRT-4 ACR (American Club Racer) and installed the Stage 3 turbo after having the Manifold ported, upgraded to a larger FMIC, ported Throttle body and a 3" Turbo back exhaust. My car has dyno'd 400HP to the wheels in High Octane Mode. Sht Stage 3 if ordered with "Toys" includes an IC sprayer, 4 levels of boost control, and a special High octane mode, that needs at least 100 Octane fuel, but adds another 30 or so HP at the touch of a button. With slicks, I have run a best of 11.50 in the quarter. On street tires in HOM and The dial a boost maxed, there is no traction in the first 3 gears. In non HOM mode it will spin the tires at the top of 2nd gear every time. Oh yeah, my wife drives it every day in the summer and it gets 30 MPG on the highway.

There are quite a few Stage 3 SRT-4s nearing 100K miles with no problems. The stock SRT-4 short block has proven itself reliable up to 500 WHP with big aftermarket turbos and such. Check out SRTFORUMS.COM. There is a HUGE following, and tons of factory and aftermarket support.

Another advantage of the stage 3 is with its TiAl wheel and relatively small compressor, there is virtually NO turbo lag. This would be a killer engine in a Jeep. Especially in the sand And the 2.4 has good torque off boost, so with the right gearing, it would be good on the rocks as well
400 HP 2.4L with 100K and 30 mpg creates a tingling feeling in my pants

I would love to see someone do this. I would try it but there is that whole "money thing"
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Old 12-29-2007, 10:48 AM   #13 (permalink)
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I think it would be interesting to see as well, I thinking Cummins 4bt for my turbo charged power
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Old 12-29-2007, 12:37 PM   #14 (permalink)
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Dodge did a good job of overbuilding the engine, the only shortcomings on the SRT 4 as a whole are traction, and weelhop.
I've seen complete motors sell for as little as 900.00 on the SRT forums. There are plenty of wrecked ones out there, Fast car + Cheap prices= young owners + many (Way too many) wrecks. Off the top of my head I can remember 7 or 8 forum members that were fatalities in these cars (R.I.P.) But there is about 3 posts a month about people totalling their car over there. I only drive mine hard at the US 66 or the Autobahn CC.
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Old 12-30-2007, 12:35 AM   #15 (permalink)
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Hahahah! Attack of the skittles! Seriously though, those little suckers run quite nicely (killed a stage 2 in my LT1... fast lunch ) I'd be interested to see if this could pan out.
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Old 12-30-2007, 08:46 AM   #16 (permalink)
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This guy added a PT Turbo to the 2.4 already in his TJ. Long post with a bunch of B.S. but the last couple pages have some good pics. He made an adapter plate that flipped the turbo/ Ex Manifold upside down, so the turpbo faces forward. My thought is it would be better to get a Mexican 2.4 Turbo manifold, or an aftermarket one like AGP makes. ( The Factory SRT/PT turbo is cast as 1 piece with the manifold for a smaller overall size) Dodge offered the 2.4 with a turbo in the late 90's in the Stratus sold in mexico, it had a standard manifold/ turbo setup Ie 2 piece. With that manifold it would be easy to swap a different turbo to facilitate clearance etc..
Non related.. I have been collecting parts to build a lakes modified style T-bucket street rod with SRT-4 power. The "SRTBucket" I have the trans(Toyota R154)/bellhousing(Wrangler 5Spd) and computer/stock Turbo/ IC etc from my Skittle.


http://www.reno4x4.com/forum/turboch...e-t5362p7.html

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Old 12-30-2007, 08:59 AM   #17 (permalink)
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This guy added a PT Turbo to the 2.4 already in his TJ. Long post with a bunch of B.S. but the last couple pages have some good pics. He made an adapter plate that flipped the turbo/ Ex Manifold upside down, so the turpbo faces forward. My thought is it would be better to get a Mexican 2.4 Turbo manifold, or an aftermarket one like AGP makes. ( The Factory SRT/PT turbo is cast as 1 piece with the manifold for a smaller overall size) Dodge offered the 2.4 with a turbo in the late 90's in the Stratus sold in mexico, it had a standard manifold/ turbo setup Ie 2 piece. With that manifold it would be easy to swap a different turbo to facilitate clearance etc..
Non related.. I have been collecting parts to build a lakes modified style T-bucket street rod with SRT-4 power. The "SRTBucket" I have the trans(Toyota R154)/bellhousing(Wrangler 5Spd) and computer/stock Turbo/ IC etc from my Skittle.


http://www.reno4x4.com/forum/turboch...e-t5362p7.html
Ya, I've caught up with him on Jeepforum.com, I need to set down and ask him a bunch of stuff.
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Old 01-02-2008, 11:42 PM   #18 (permalink)
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yup this me.....Not sure why its in the hardcore section..lol...I get a lot of crap from some people, but the set up works great I have driven 1,400 mile trips with no problems.
My wife is about ready to give birth to our little girl after she is done I promise I will write the parts down and get the rest of the pics and info..

Direct link...http://www.reno4x4.com/forum/turboch...-me-t5362.html

http://www.jeepforum.com/forum/showthread.php?t=333749
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Old 01-03-2008, 02:01 PM   #19 (permalink)
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Ummm I didnt se it mentioned but are you guys swapping tranny's? Hows your AX5 holding up to all that HP??
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Old 01-03-2008, 02:12 PM   #20 (permalink)
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NV Trans......
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Old 01-03-2008, 04:14 PM   #21 (permalink)
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It has been done before, with a Dodge SRT4 engine. I will try finding the info, but I also belive JP magazine brought that up before. Cool project though!
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Old 07-09-2008, 12:15 PM   #22 (permalink)
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I have adapters for sale if anybody wants one........

http://cgi.ebay.com/ebaymotors/ws/eB...m=150290814573




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Old 09-04-2008, 04:30 PM   #23 (permalink)
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So is anybody else going to try and Turbo there 2.4L????
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Old 09-04-2008, 04:43 PM   #24 (permalink)
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Quote:
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I have adapters for sale if anybody wants one........

http://cgi.ebay.com/ebaymotors/ws/eB...m=150290814573




wow you didnt get flamed for no yellow star
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Old 09-04-2008, 04:49 PM   #25 (permalink)
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well All I have is 12 parts and thats all that I had made extra, and this is all that will be made. So I guess I can pay for a vendor for 12 parts to be sold but that would suck but if the mods feel that I need too. Then just delete my post.

I'm not trying to make a buisness out of this it was just cheaper to have this many made due to cost involved to have just one made. so I want to just get rid of the other ones.

Not really do think it would be manditory to become a vendor for a almost one off part that only a hand full of people will even buy one if any do at all. But Mods speak up if so..

Or just send me a PM with Vendor payment info.
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