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350 HP 4.7L Stroker '97 Jeep XJ

Project vehicle blogs or "mod diary" specific threads only.. Pics encouraged!!
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SkylinesSuck
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Posts: 355
Joined: February 14th, 2009, 11:11 pm
Stroker Displacement: 4.6L
Vehicle Year: 1998
Vehicle Make: Jeep
Vehicle Model: Wrangler
Location: Northern VA

Re: 350 HP 4.7L Stroker '97 Jeep XJ

Post by SkylinesSuck » March 16th, 2018, 4:41 am

Very nice! Glad to see a graph showing it kept making power around 5k rpm. Makes me want to shift a little higher. Ported head? I'm in for build specs.

BcurpKodiak
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Posts: 61
Joined: November 2nd, 2015, 8:12 pm
Vehicle Year: 1997
Vehicle Make: Jeep
Vehicle Model: XJ

Re: 350 HP 4.7L Stroker '97 Jeep XJ

Post by BcurpKodiak » April 4th, 2018, 7:41 pm

I keep checking this hoping for specs

sly-jeeper
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Stroker Displacement: 4.6L
Vehicle Year: 1994
Vehicle Make: jeep
Vehicle Model: cherokee
Location: Kaleva, mi

Re: 350 HP 4.7L Stroker '97 Jeep XJ

Post by sly-jeeper » April 5th, 2018, 2:25 pm

Ooo

BcurpKodiak
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Posts: 61
Joined: November 2nd, 2015, 8:12 pm
Vehicle Year: 1997
Vehicle Make: Jeep
Vehicle Model: XJ

Re: 350 HP 4.7L Stroker '97 Jeep XJ

Post by BcurpKodiak » April 15th, 2018, 8:54 pm

Image

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SkylinesSuck
Donator
Donator
Posts: 355
Joined: February 14th, 2009, 11:11 pm
Stroker Displacement: 4.6L
Vehicle Year: 1998
Vehicle Make: Jeep
Vehicle Model: Wrangler
Location: Northern VA

Re: 350 HP 4.7L Stroker '97 Jeep XJ

Post by SkylinesSuck » April 17th, 2018, 2:04 pm

I love Jeep porn. Keep it coming!

BcurpKodiak
Making Progress
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Posts: 61
Joined: November 2nd, 2015, 8:12 pm
Vehicle Year: 1997
Vehicle Make: Jeep
Vehicle Model: XJ

Re: 350 HP 4.7L Stroker '97 Jeep XJ

Post by BcurpKodiak » May 8th, 2018, 8:17 pm

Bought a 63mm throttle body spacer (1" thick) off ebay for $40. Tried to buy a Hesco and they're no longer being made in 68mm like I wanted. I was informed there's no reason for that big of a throttle body unless it's forced induction. So I found another avenue.

Took the throttle body spacer to my machinist on island and had it knocked out to 68mm in under an hour for $20. Total cost was less than half what Hesco wanted for their 68mm spacer. It will add about 5 cubic inches of plenum volume and space the throttle body up away from the floor of the intake manifold.

Here are some pics of the engine now. Doug thorley header with a 3" pipe dumped just like that. My entire exhaust system in one picture!! I couldn't make it louder if I tried! Welded it straight to the header after cutting the 2.5" flange off, and welded in the O2 bungs.

Image

Image

BcurpKodiak
Making Progress
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Posts: 61
Joined: November 2nd, 2015, 8:12 pm
Vehicle Year: 1997
Vehicle Make: Jeep
Vehicle Model: XJ

Re: 350 HP 4.7L Stroker '97 Jeep XJ

Post by BcurpKodiak » May 9th, 2018, 8:01 pm

Installed 68MM throttle body spacer, 68mm painless throttle body, and then all high flow parts from HESCO - water pump/thermostat/thermostat housing

Image

BcurpKodiak
Making Progress
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Posts: 61
Joined: November 2nd, 2015, 8:12 pm
Vehicle Year: 1997
Vehicle Make: Jeep
Vehicle Model: XJ

Re: 350 HP 4.7L Stroker '97 Jeep XJ

Post by BcurpKodiak » May 27th, 2018, 10:50 am

Aaaaaaand it shoots fire
Image

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SkylinesSuck
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Posts: 355
Joined: February 14th, 2009, 11:11 pm
Stroker Displacement: 4.6L
Vehicle Year: 1998
Vehicle Make: Jeep
Vehicle Model: Wrangler
Location: Northern VA

Re: 350 HP 4.7L Stroker '97 Jeep XJ

Post by SkylinesSuck » May 28th, 2018, 12:41 am

Cool! But why?

BcurpKodiak
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Posts: 61
Joined: November 2nd, 2015, 8:12 pm
Vehicle Year: 1997
Vehicle Make: Jeep
Vehicle Model: XJ

Re: 350 HP 4.7L Stroker '97 Jeep XJ

Post by BcurpKodiak » May 31st, 2018, 2:47 pm

I don't know yet. I suspect it's a combination of about 10" of 3" pipe coming off the header and running a bit rich

BcurpKodiak
Making Progress
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Posts: 61
Joined: November 2nd, 2015, 8:12 pm
Vehicle Year: 1997
Vehicle Make: Jeep
Vehicle Model: XJ

Re: 350 HP 4.7L Stroker '97 Jeep XJ

Post by BcurpKodiak » June 3rd, 2018, 12:23 pm

Re-routed my exhaust! No more fire. AFR is just within an acceptable range and I got the cam broken in. This thing is LOUD! I only re-routed it to keep fumes out of the cab. Flexed it out in the garage (dangerously with a floor jack, I do not recommend) to check clearance from the tire. I do think it's going to "tickle" it a bit and clearance it for me haha.

There's no upper control arm in the way on that side because it's a 3-link

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User avatar
SkylinesSuck
Donator
Donator
Posts: 355
Joined: February 14th, 2009, 11:11 pm
Stroker Displacement: 4.6L
Vehicle Year: 1998
Vehicle Make: Jeep
Vehicle Model: Wrangler
Location: Northern VA

Re: 350 HP 4.7L Stroker '97 Jeep XJ

Post by SkylinesSuck » June 3rd, 2018, 7:25 pm

That's hawt :rockout:

BcurpKodiak
Making Progress
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Posts: 61
Joined: November 2nd, 2015, 8:12 pm
Vehicle Year: 1997
Vehicle Make: Jeep
Vehicle Model: XJ

Re: 350 HP 4.7L Stroker '97 Jeep XJ

Post by BcurpKodiak » June 3rd, 2018, 10:09 pm

Thanks! Although I already anticipate getting tired of how loud it is even though it's almost strictly a trail rig

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