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Author Topic:   85 5.0 BLOCK SWAP
Bluegras
Journeyman

Posts: 23
From:
Registered: Nov 2001

posted 01-03-2002 12:12 AM     Click Here to See the Profile for Bluegras   Click Here to Email Bluegras     Edit/Delete Message   Reply w/Quote
Would there be any driveability problem with a stock roller cammed block in place of the flat tappet in an 85 F150 Speed Density EFI pu?

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SteveLaRiviere
Administrator

Posts: 20027
From: Saco, Maine USA
Registered: May 99

posted 01-03-2002 07:47 PM     Click Here to See the Profile for SteveLaRiviere   Click Here to Email SteveLaRiviere     Edit/Delete Message   Reply w/Quote
All of the ECM's parameters would be off, so I bet there would be problems.

------------------

'70 Mustang Mach 1 M code 351C 4V/FMX/3.25 open
'72 Mustang Sprint Coupe 351C 4V/FMX/4.30 Trac Lok
'94 F-150 XL 5.8L/E4OD/3.55 Limited Slip
'97 Probe GTS 2.5L DOHC

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cpmaverick
Moderator

Posts: 1180
From: Auburn, AL.
Registered: Jan 2000

posted 01-03-2002 07:47 PM     Click Here to See the Profile for cpmaverick   Click Here to Email cpmaverick     Edit/Delete Message   Reply w/Quote
I think the Truck computer could compensate for the roller cam. You might want to look into buying an adjustable fuel pressure regulator to up the fuel pressure in case it runs a little lean with the extra air.

EDIT: Are you using a fullsize car or Mustang roller cam?

[This message has been edited by cpmaverick (edited 01-03-2002).]

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Bluegras
Journeyman

Posts: 23
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Registered: Nov 2001

posted 01-04-2002 12:34 AM     Click Here to See the Profile for Bluegras   Click Here to Email Bluegras     Edit/Delete Message   Reply w/Quote
Good question. I would have tried to use a Mustang 5L block unless you have info I should consider. Cam lobe went flat on a rebuilt short block and my Lsc MK7 runs so well as speed density I was trying to see if it could be done without any problems.
Thanks Charlie.

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cpmaverick
Moderator

Posts: 1180
From: Auburn, AL.
Registered: Jan 2000

posted 01-04-2002 10:01 PM     Click Here to See the Profile for cpmaverick   Click Here to Email cpmaverick     Edit/Delete Message   Reply w/Quote
I really think that with an adjustable FPR you can make the truck run fine, but surely you can find some info on the web where someone has done this.

If there are any problems, the truck ECM would be closer to the full-size car cam and compression, but I think the Mustang one (stock) would work.

Try posting on http://www.pirate4x4.com/forum . There are a lot of knowledgable people there and many have converted to or modified Ford Truck Fuel Injection.

------------------
-Charlie Ping
1970 Maverick Grabber
[email protected] with AC and overdrive.
http://www.maverickgrabber.com

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