Understanding Tuning for my stroker

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BcurpKodiak
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Joined: November 2nd, 2015, 8:12 pm
Vehicle Year: 1997
Vehicle Make: Jeep
Vehicle Model: XJ

Understanding Tuning for my stroker

Post by BcurpKodiak »

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.
wldc10
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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

Post by wldc10 »

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.
BcurpKodiak
Making Progress
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Joined: November 2nd, 2015, 8:12 pm
Vehicle Year: 1997
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Re: Understanding Tuning for my stroker

Post by BcurpKodiak »

Thanks for the response. Can you tell me what pump and FPR you bought?
wldc10
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

Post by wldc10 »

The pump is a Walpro 255LPH inline. They also have an intake version. I’ll need to find out what FPR was used.
wldc10
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

Post by wldc10 »

The FPR is from Mallory.
BcurpKodiak
Making Progress
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Joined: November 2nd, 2015, 8:12 pm
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Vehicle Model: XJ

Re: Understanding Tuning for my stroker

Post by BcurpKodiak »

Thanks for the insight, I'll be looking into those parts
stroker
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Joined: December 8th, 2013, 4:34 am
Stroker Displacement: 5.0

Re: Understanding Tuning for my stroker

Post by stroker »

I can help you with stock ecu tune
BcurpKodiak
Making Progress
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Posts: 73
Joined: November 2nd, 2015, 8:12 pm
Vehicle Year: 1997
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Vehicle Model: XJ

Re: Understanding Tuning for my stroker

Post by BcurpKodiak »

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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