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2.5 to 3.1 and a turbo soon!

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cmcb15
Noob
Noob
Posts: 10
Joined: August 10th, 2008, 4:08 pm
Stroker Displacement: 3.1
Vehicle Year: 1995
Vehicle Make: Jeep
Vehicle Model: YJ
Location: San Diego, CA

2.5 to 3.1 and a turbo soon!

Post by cmcb15 » March 22nd, 2020, 4:40 pm

Hey all,

I’ve actually never posted anything but I finally thought I should maybe post since there are very few to no projects like mine. I know you all are thinking...why a 2.5?! Well...lots of reasons: 1. It’s over 110lbs lighter than a 4.0, 2. by stroking it to 3.1 I’ll start with 4.0 power and still weigh MUCH less, 3. its different.

So to start I braved buying the 505 Performance 3.1 stroker kit from Zach for my 95’ YJ. Yes, he has horrible customer service but his parts have good quality once I finally got them all. I had the block machined here locally and assembled it myself. It had a broken skirt so it was time to do something anyway. Got his “custom” cam and ported HD head. Studded the mains and head and put on a long tube header. Every sensor, bolt, nut, and all accessories are new. 8.8 rear, AX-15 conversion, Tom Woods driveshafts front/rear. I’ve done a partial frame off on the Jeep and now just finishing getting the motor running and miles put on it to start the turbo build.

Got the motor running on the stock computer. It ran very good. I started to develop a studder while deccelerating after about 100 miles so after much diagnosis it was the ECU that needed help. Well those aren’t easy to find. After trying a couple stock ECU’s I decided to go aftermarket. Enter MegaSquirt! I ordered up an MS3 Gold box from EFI Source who are great guys! They’ve been super helpful thus far.

I’m in the middle of getting the wiring done so I can power up the MS3 and start testing sensors and working on a tune. More to come...
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SkylinesSuck
Donator
Donator
Posts: 521
Joined: February 14th, 2009, 11:11 pm
Stroker Displacement: 4.6L
Vehicle Year: 1998
Vehicle Make: Jeep
Vehicle Model: Wrangler
Location: Northern VA

Re: 2.5 to 3.1 and a turbo soon!

Post by SkylinesSuck » March 23rd, 2020, 1:57 pm

Very interesting. Look forward to seeing your results!

cmcb15
Noob
Noob
Posts: 10
Joined: August 10th, 2008, 4:08 pm
Stroker Displacement: 3.1
Vehicle Year: 1995
Vehicle Make: Jeep
Vehicle Model: YJ
Location: San Diego, CA

Re: 2.5 to 3.1 and a turbo soon!

Post by cmcb15 » March 26th, 2020, 6:29 am

For some reason all the pics I attached didn’t show so posting some more individually. Sorry for the multiple posts.
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cmcb15
Noob
Noob
Posts: 10
Joined: August 10th, 2008, 4:08 pm
Stroker Displacement: 3.1
Vehicle Year: 1995
Vehicle Make: Jeep
Vehicle Model: YJ
Location: San Diego, CA

Re: 2.5 to 3.1 and a turbo soon!

Post by cmcb15 » March 26th, 2020, 6:30 am

When it was just finished getting out back together.
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cmcb15
Noob
Noob
Posts: 10
Joined: August 10th, 2008, 4:08 pm
Stroker Displacement: 3.1
Vehicle Year: 1995
Vehicle Make: Jeep
Vehicle Model: YJ
Location: San Diego, CA

Re: 2.5 to 3.1 and a turbo soon!

Post by cmcb15 » March 27th, 2020, 4:57 pm

Ok everyone, in case anyone wanted to know...a Megasquirt MS3 WILL run a 2.5 using all stock sensors from a 94/95 and a cam sensor from a 2000 4.0. Just got her running and she runs great so far. I’ve tried to find other people that have done it and while I understand people aren’t putting much money into their 2.5’s, as a whole considering cost and effort I feel it was well worth it! Now for tuning and a turbo. More to come...

jasonb
Making Progress
Making Progress
Posts: 53
Joined: August 7th, 2015, 5:59 pm
Vehicle Year: 1996
Vehicle Make: Jeep
Vehicle Model: Cherokee

Re: 2.5 to 3.1 and a turbo soon!

Post by jasonb » March 27th, 2020, 6:46 pm

Interesting project! I don't know much about the 2.5 so forgive me, what crank strokes it? Or is it custom?

cmcb15
Noob
Noob
Posts: 10
Joined: August 10th, 2008, 4:08 pm
Stroker Displacement: 3.1
Vehicle Year: 1995
Vehicle Make: Jeep
Vehicle Model: YJ
Location: San Diego, CA

Re: 2.5 to 3.1 and a turbo soon!

Post by cmcb15 » March 27th, 2020, 7:49 pm

To be honest I don’t actually know but I’m going to assume it’s custom. Stroker kits are priced about the same as everything else since they aren’t overly popular. With the weight savings and a turbo it should be pretty impressive for sure. “They claim” 200hp/200ftlbs from the stroker alone. We shall see. Once I get it driving and a decent tune I will be having it dyno tuned to see how the engine alone does then with the turbo to really bring it all together. I’m excited. Glad it’s different. A learning curve, absolutely!

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