4.2L Stroker - Mustang Evolution

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Old 09-06-2011, 09:08 PM   #1
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OK,

I'm thinking about doing a 4.2L stroker. So I know I need a crank, piston and rods as well as the 310 LPM fuel pulp. But I have questions. Does it have to come from an F150 or can it be from a Freestar? Do I need to go to bigger injectors and if so how big and from what? Oh and I don't want to hear any why are you doing this, it costs too much for too little gains crap. I'm just looking for valuable input and expertise here.

Thanks

Oh and I know there are kits out there, but I will likely buy the required bits a piece at a time as I can afford it over the winter.
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Old 09-07-2011, 06:38 AM   #2
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Re: 4.2L Stroker

Tom Morana Racing Engines

here's a fully compatible kit, but it's really pricey! I will be doing this conversion next summer, si good luck, and I'll be hounding you with questions when you're done! I'm going 4.2 with an m90 blower...
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Old 09-07-2011, 03:42 PM   #3
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Quote:
Originally Posted by bmabbott
Tom Morana Racing Engines

here's a fully compatible kit, but it's really pricey! I will be doing this conversion next summer, si good luck, and I'll be hounding you with questions when you're done! I'm going 4.2 with an m90 blower...
Mmmm....how you going to mount a blower for a single port application onto a spot port engine?
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Old 09-07-2011, 04:09 PM   #4
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I'd do the 4.2, and then an m112! It actually fits on the 99-04 v6s
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Old 09-07-2011, 04:31 PM   #5
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Re: 4.2L Stroker

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Mmmm....how you going to mount a blower for a single port application onto a spot port engine?
I have a single port v6, the m90 blower was on the 89-94 supercoupe 3.8l SINGLE PORT engine... it's nearly directly compatible... I just have to do a little work on my lower intake.

---------- Post added at 04:31 PM ---------- Previous post was at 04:31 PM ----------

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I'd do the 4.2, and then an m112! It actually fits on the 99-04 v6s
I have a 98... m90 for me
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Old 09-07-2011, 04:32 PM   #6
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Oh yeah, ha, sorry... I should've know from your picture. But why not do a splitport swap while your at it? You'll gain way more power with the swap, 4.2 stroker kit, and an m112.
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Old 09-07-2011, 04:36 PM   #7
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Or do the split port swap to maximize the 4.2 stroker. But you are kinda hijacking my thread......
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Old 09-07-2011, 04:39 PM   #8
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Re: 4.2L Stroker

but, back to the 4.2l topic... I believe Ford had a 4.2L v6 engine in their 97-99 f150 that you can take the crank, rods and pistons out of....

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Or do the split port swap to maximize the 4.2 stroker. But you are kinda hijacking my thread......
ok... sorry... no more advice from me
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Old 09-07-2011, 04:42 PM   #9
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Yes, you are correct...the Freestar was 4.2l as well...but I don't know if the parts are interchangeable. I also heard the 310 LPH fuel pump can be sourced from an SVT Focus...I also heard you need bigger injectors...but from where and how big do they need to be?

---------- Post added at 02:42 PM ---------- Previous post was at 02:41 PM ----------

No worries advice is welcome...and I kinda did start down the road to the questions put to you...I was just trying to get the thread back on track. Sorry....
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Old 09-07-2011, 09:39 PM   #10
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No help out there?
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Old 09-07-2011, 10:44 PM   #11
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I'd do a google search. I think I remember seeing a complete 4.2 swap writeup on another forum
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Old 09-07-2011, 11:13 PM   #12
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Really? Because I did a search in hopes of finding something like that and came up empty....
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Old 09-08-2011, 06:41 AM   #13
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Re: 4.2L Stroker

How to: 4.2L V6 Mustang Engine Swap
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*71 Chevelle, 350, 4 spd, H/C/I, (~400 hp)
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Old 09-08-2011, 03:34 PM   #14
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Thanks for the link. It doesn't touch on fuel system though.Are bigger injectors required?
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Old 09-09-2011, 12:45 PM   #15
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Yes...no?
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Old 09-12-2011, 05:16 PM   #16
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Use the ones from the 4.2L I believe
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Old 09-12-2011, 08:36 PM   #17
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What size are they?
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Old 09-13-2011, 03:34 PM   #18
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I'm not too sure you could just upgrade to 36lb and call it a day not need to worry about upgrading again
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Old 09-13-2011, 05:38 PM   #19
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Ok...and what year/model came with 36lbs injectors...Mustang GT's?
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Old 09-13-2011, 05:47 PM   #20
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No gts has 24 pound injectors you would have to go after market and also get the ev6 connectors or go aftermarket on 42s
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Old 09-13-2011, 09:46 PM   #21
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Quote:
Originally Posted by DSGstang513
No gts has 24 pound injectors you would have to go after market and also get the ev6 connectors or go aftermarket on 42s
What do our cars have?
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Old 09-13-2011, 09:48 PM   #22
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I want to say I remember reading somewhere that they have 19# injectors stock
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Old 09-13-2011, 09:51 PM   #23
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That might be right I'm not sure I believe our v6 cars have bigger injectors
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Old 09-17-2011, 10:17 PM   #24
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Re: 4.2L Stroker

I think they are 19# on 99-04 v6. I know my 98 has 14#. When I go with the 4.2 Stroker on mine, I am planning on using 24# injectors, because my 14# won't work with the stroker and forced induction combo... It's always best to go a little bigger than what you think you may need, because you can always make larger injectors act small... but the stock 19# ones may work for your split-port with the stroker...
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Old 10-12-2014, 01:31 AM   #25
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Quote:
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Ok...and what year/model came with 36lbs injectors...Mustang GT's?
The early tBird SC came with 30lb injectors and the 94-95 came with 36lb injectors. So could use those...
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