Hello,
I need to try and understand what I need to tune my stroker once it's installed. I want to buy the parts soon.
1997 Jeep XJ
4.7L alum head stroker 11:1 comp (hopefully 300 HP or more)
26 lb injectors
It's my understanding there's not an adjustable FPR for my year? I believe I've read I would have to convert to an older style fuel rail to use an adjustable FPR.
Looks like I will need an adjustable MAP sensor. Timing can't really be played with unless you can tune the "computer". I plan to run a vacuum gauge and a wideband AFR gauge.
Can someone give me a rundown of what I need to do? I searched and didn't really find a thread like this.
Understanding Tuning for my stroker
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- Making Progress
- Posts: 73
- Joined: November 2nd, 2015, 8:12 pm
- Vehicle Year: 1997
- Vehicle Make: Jeep
- Vehicle Model: XJ
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- Posts: 7
- Joined: September 11th, 2010, 1:26 pm
- Vehicle Year: 2001
- Vehicle Make: Jeep
- Vehicle Model: XJ
- Location: Phoenix, AZ
Re: Understanding Tuning for my stroker
You could install an adjustable fuel regulator when the factory one goes out.
I believe 1997+ had the fix regulator at the fuel pump in the gas tank. The factory pump on my 01 XJ went out on mine, and then had an inline high-rate pump with adjustable fuel regulator. The regulator was installed under the hood, so adjustments are easier.
I have a mid-range stroker build with 10:1 compression, Eldebrock aluminum head from Russ Pottenger, and 703 Bosch injectors. The AFRs are good overall. I have not done any other tuning.
I believe 1997+ had the fix regulator at the fuel pump in the gas tank. The factory pump on my 01 XJ went out on mine, and then had an inline high-rate pump with adjustable fuel regulator. The regulator was installed under the hood, so adjustments are easier.
I have a mid-range stroker build with 10:1 compression, Eldebrock aluminum head from Russ Pottenger, and 703 Bosch injectors. The AFRs are good overall. I have not done any other tuning.
-
- Making Progress
- Posts: 73
- Joined: November 2nd, 2015, 8:12 pm
- Vehicle Year: 1997
- Vehicle Make: Jeep
- Vehicle Model: XJ
Re: Understanding Tuning for my stroker
Thanks for the response. Can you tell me what pump and FPR you bought?
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- Posts: 7
- Joined: September 11th, 2010, 1:26 pm
- Vehicle Year: 2001
- Vehicle Make: Jeep
- Vehicle Model: XJ
- Location: Phoenix, AZ
Re: Understanding Tuning for my stroker
The pump is a Walpro 255LPH inline. They also have an intake version. I’ll need to find out what FPR was used.
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- Posts: 7
- Joined: September 11th, 2010, 1:26 pm
- Vehicle Year: 2001
- Vehicle Make: Jeep
- Vehicle Model: XJ
- Location: Phoenix, AZ
Re: Understanding Tuning for my stroker
The FPR is from Mallory.
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- Making Progress
- Posts: 73
- Joined: November 2nd, 2015, 8:12 pm
- Vehicle Year: 1997
- Vehicle Make: Jeep
- Vehicle Model: XJ
Re: Understanding Tuning for my stroker
Thanks for the insight, I'll be looking into those parts
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- Posts: 9
- Joined: December 8th, 2013, 4:34 am
- Stroker Displacement: 5.0
Re: Understanding Tuning for my stroker
I can help you with stock ecu tune
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- Making Progress
- Posts: 73
- Joined: November 2nd, 2015, 8:12 pm
- Vehicle Year: 1997
- Vehicle Make: Jeep
- Vehicle Model: XJ
Re: Understanding Tuning for my stroker
I now have it about 99% tuned. It's an animal. Waiting on 1 more possible revision from Ryan at FRP
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