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  • October 09, 2024, 09:19:30 AM

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Author Topic: 4.0 stroker replacement  (Read 1903 times)

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Offline rmick

  • Eagle Sport
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  • Posts: 392
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4.0 stroker replacement
« on: August 19, 2022, 08:28:40 PM »
Well looks like I need to replace my tired 258. Broke a piston skirt. Looking at a 4.0 stroker as a replacement engine. Any one have any experience with this been looking at crate engines from different sources. Hope just swap my accessories and bolt back into place. Any recommended vendors?
72 Javelin AMX
72 Javelin SST
72 Gremlin with 4.0
81 SX 4

Offline djm3452004

  • Eagle
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  • Posts: 135
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Re: 4.0 stroker replacement
« Reply #1 on: August 19, 2022, 09:04:46 PM »
Well looks like I need to replace my tired 258. Broke a piston skirt. Looking at a 4.0 stroker as a replacement engine. Any one have any experience with this been looking at crate engines from different sources. Hope just swap my accessories and bolt back into place. Any recommended vendors?



AVOID Promar Engines out of NJ.  Have had a number of serious issues with a rebuilt 258 from them that resulted in a lot of hassle.  I can elaborate if you need details but don't feel like boring anyone by writing a book.  I finally built my own motor that I'm in the process of breaking-in right now.
Current Project: 1983 Eagle Wagon 258
Past AMC Project(s):  1979 Spirit Liftback 232
                                1968 Ambassador 287

Offline amcfool1

  • Eagle Limited
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Re: 4.0 stroker replacement
« Reply #2 on: August 19, 2022, 11:32:29 PM »
hi, if you have deeep pockets, check out Newcomer Racing in NC.  :)  btw, keep your Eagle oil pan!   good luck,  gz

Offline rmick

  • Eagle Sport
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Re: 4.0 stroker replacement
« Reply #3 on: August 20, 2022, 09:54:03 AM »
Sorry no deep pockets unless folks want to donate for the cause. Was looking at these guys. https://www.sandjengines.com/searchproducts/enginesearch/288
72 Javelin AMX
72 Javelin SST
72 Gremlin with 4.0
81 SX 4

Online Taylor

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  • Eagle Sundaancer
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Re: 4.0 stroker replacement
« Reply #4 on: September 06, 2023, 08:27:16 PM »
Stirring a old pot here, what engine and or engine builder did you go with. Curious to know.
Thanks,
Taylor
2010 Toyota Rav4 pack mule, totaled 3/26/24 rear ended REAL HARD. concussion and whiplash. not fun
1999 Ford E250 conversion/work van 238,000 see if it will make 300,000
1985 AMC Eagle Limited Wagon 🖖🏼🦅
2020 Honda Africa Twin, the long haul trucker

Offline rmick

  • Eagle Sport
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  • Posts: 392
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Re: 4.0 stroker replacement
« Reply #5 on: September 07, 2023, 12:18:36 AM »
I went with S and J and got the one for 91-95 block https://www.sandjengines.com/searchproducts/enginesearch/288 It came with the 7120 head or equivalent.
72 Javelin AMX
72 Javelin SST
72 Gremlin with 4.0
81 SX 4

Offline vangremlin

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Re: 4.0 stroker replacement
« Reply #6 on: September 07, 2023, 11:13:12 AM »
Have you been pretty happy with the engine?  Thanks
1981 Kammback 258 - "Pepe"
1980 Coupe 258 - "Ginger
1972 Gremlin X 304
1978 Gremlin 4 cyl 121 - sold
1964 TBird 390 - sold

Offline rmick

  • Eagle Sport
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  • Posts: 392
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Re: 4.0 stroker replacement
« Reply #7 on: September 07, 2023, 04:45:55 PM »
Ya Ive about 800 miles on it now Maybe a little peppier than my old 258 with the 4.0 head. Just seat of the pants feel.
72 Javelin AMX
72 Javelin SST
72 Gremlin with 4.0
81 SX 4

 

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