I am in the USAF and did my first stroker motor about 7.5 years ago. I have a '90 Wrangler, love it, but I tow my boat with it and the Jeep didn't have the power I wanted. At the time of the stroker, I had endured the "craperator" for long enough. I wanted EFI, and a mild stroke....so this is what I did:
I took my 4.2, gutted it;
- Bored the cylinders .030 over, put hypuretic pistons in it
- Kept the 4.2 crank
- Kept the 4.2 rods
- Put a gone over 4.0 head on it (sealed off some water jackets because they didn't line up)
- Slapped a 4.0 Cherokee EFI setup on it
- Changed the EFI stuff I needed to (brackets and stuff like that)
Then I called it good and fired it up.
I'm in the USAF and was subsequently shipped overseas for 5 years. Put it into storage, up on blocks and when I went to fire it up, it took 3 cranks and vroom! It was back to life! Now that I'm back and with all the stroker talk.....I want to know....um,.....what did I do and what do I have? What liter is it? What is my compression ratio?
The power is OK, not what I thought it was going to be....not a CRAAZY amount better in towing my boat.
After I know what my Motor is at (in liters) I would like to get your advice.....I would like to get a little more power out of what I have. I "may" stroke it again, use a 4.0 block, my 4.2 crank, 4.0 head, etc....but for the short term I would like to get more power out of what I have.
1. I have a squeal in the throttle body....do I need a bigger one? Will that give me more power at the mid-high end? - I think I do but just asking for help and the technology behind it. I want to understand the "Why?" question
2. Do I need bigger injectors? The 24# perhaps? - I think so based on the increased cylinder volume.....
2. If I put in new injectors, do I need a new fuel pressure regulator and what should I set it at?
Thanks for your time - Ken