Brought to you in part by:
Shop Eastwood for all your Auto Restoration Needs!

.


  Mustangsandmore Forums
  Ford Trucks
  questions about rebuilt 351W FI

Post New Topic  Post A Reply
profile | register | preferences | faq | search

UBBFriend: Email This Page to Someone! next newest topic | next oldest topic
Author Topic:   questions about rebuilt 351W FI
CometGT1974
Gearhead

Posts: 249
From: Asheville, NC USA
Registered: Jan 2002

posted 01-21-2003 08:04 PM     Click Here to See the Profile for CometGT1974   Click Here to Email CometGT1974     Edit/Delete Message   Reply w/Quote
Well, I just installed the newly rebuilt 351W back into my 89 F250 and was curious about a couple things before I fire it up. I did a basic .030" overbore rebuild with an OE style rebuild kit and a towing cam. I installed a set of 289 heads that I used to have on my race car, 1.85 Int. 1.55 exh. valves(Manley race-flo) the bowls have been ported and the exhaust has been hogged out, the intake runner has been cleaned up slightly. The cam is a generic towing cam, .424 int. .484 exh. lift w/ 204/214 duration. I took all the smog stuff off and am running a set of flowtech long tubes into 2.25 duals w/ flowmasters. I'm wondering how this thing is gonna idle?? If it will idle at all ?? What should I expect as far as towing power, as opposed to stock?? Any surprises I should look out for?? Any advice/suggestions appreciated!!!

IP: Logged

MLariviere
Moderator

Posts: 3578
From: Biddeford,Me.USA
Registered: May 99

posted 01-21-2003 09:13 PM     Click Here to See the Profile for MLariviere   Click Here to Email MLariviere     Edit/Delete Message   Reply w/Quote
Sounds good. Are you running an EFI?

IP: Logged

CometGT1974
Gearhead

Posts: 249
From: Asheville, NC USA
Registered: Jan 2002

posted 01-21-2003 09:23 PM     Click Here to See the Profile for CometGT1974   Click Here to Email CometGT1974     Edit/Delete Message   Reply w/Quote
yes, stock fuel injection....only changes were the 289 heads, .030 overbore, the towing cam and the new exhaust system....I'm just curious if the fuel injection will be able to handle all these changes i've made and still maintain good driveability. I'm pretty sure this thing is speed density and i've always heard that SD doesn't react well to cam changes and head swaps....oh yeah, i'll be running 9.5:1 compression....

IP: Logged

SteveLaRiviere
Administrator

Posts: 36138
From: Saco, Maine
Registered: May 99

posted 01-22-2003 08:35 AM     Click Here to See the Profile for SteveLaRiviere   Click Here to Email SteveLaRiviere     Edit/Delete Message   Reply w/Quote
That's a mild cam, you'll be all set.

------------------
'70 Mustang Mach 1 - '72 Mustang Sprint - '94 F-150

Please remember our sponsors,
Mustangs Plus, NPD, Osborn Reproductions, MyFordPerformance.com, and FordRamAir.com

IP: Logged

CometGT1974
Gearhead

Posts: 249
From: Asheville, NC USA
Registered: Jan 2002

posted 01-30-2003 10:48 AM     Click Here to See the Profile for CometGT1974   Click Here to Email CometGT1974     Edit/Delete Message   Reply w/Quote
This is gonna sound like a dumb question but I've just gotta ask....i'm gonna set the base timing on this engine tonight and I'm not sure i'm familiar with the correct way to do it so someone please tell me if this will be the correct way to do it. Aren't I supposed to unplug the wiring from the distributor and just line up the painted mark on the balancer with the timing pointer?? Doesn't that mark represent 10 deg. BTDC ??

IP: Logged

SteveLaRiviere
Administrator

Posts: 36138
From: Saco, Maine
Registered: May 99

posted 01-30-2003 06:09 PM     Click Here to See the Profile for SteveLaRiviere   Click Here to Email SteveLaRiviere     Edit/Delete Message   Reply w/Quote
You need to verify the number 1 cylinder is at Top Dead Center because you need to make sure the plug will fire at the end of the compressions stroke. {remember, on a 4 stroke engine the timing mark is at TDC at the end of the exhaust stroke also} Take out the number 1 spark plug, plug your thumb over the hole and turn the engine over. You'll hear and feel the air rush out on the compression stroke, then you'll know you are using the right TDC.

------------------
'70 Mustang Mach 1 - '72 Mustang Sprint - '94 F-150

Please remember our sponsors,
Mustangs Plus, NPD, Osborn Reproductions, MyFordPerformance.com, and FordRamAir.com

IP: Logged

CometGT1974
Gearhead

Posts: 249
From: Asheville, NC USA
Registered: Jan 2002

posted 02-03-2003 03:43 PM     Click Here to See the Profile for CometGT1974   Click Here to Email CometGT1974     Edit/Delete Message   Reply w/Quote
OK, here's the deal...I noticed that when I pull the little chip out to set the timing (sorry, can't recall the name of the "little chip") nothing changes whether the chip is in or out....so I peeled the tape back on the harness and there is a bare wire, so on the part of the harness that leads to the "little chip" there are two yellow wires and a bare wire w/ no insulation. The part of the harness that leads to the distributor looks intact. Any ideas what this bare wire is for and shouldn't the timing change when you put the chip back in?? Please help!!!

IP: Logged

SteveLaRiviere
Administrator

Posts: 36138
From: Saco, Maine
Registered: May 99

posted 02-03-2003 06:37 PM     Click Here to See the Profile for SteveLaRiviere   Click Here to Email SteveLaRiviere     Edit/Delete Message   Reply w/Quote
Do you have it running?

------------------
'70 Mustang Mach 1 - '72 Mustang Sprint - '94 F-150

Please remember our sponsors,
Mustangs Plus, NPD, Osborn Reproductions, MyFordPerformance.com, and FordRamAir.com

IP: Logged

CometGT1974
Gearhead

Posts: 249
From: Asheville, NC USA
Registered: Jan 2002

posted 02-03-2003 07:20 PM     Click Here to See the Profile for CometGT1974   Click Here to Email CometGT1974     Edit/Delete Message   Reply w/Quote
yes, it is running....seems a little sluggish but is running smooth...idle is a little high. I'm not real familiar with these trucks or the EEC IV but it just seems to me like somehting is wrong with the timing or the timing advance.

IP: Logged

SteveLaRiviere
Administrator

Posts: 36138
From: Saco, Maine
Registered: May 99

posted 02-04-2003 12:02 PM     Click Here to See the Profile for SteveLaRiviere   Click Here to Email SteveLaRiviere     Edit/Delete Message   Reply w/Quote
It does have to run a while for the computer to 'relearn' it's parameters. Are all the sensors hooked up ok? Have you scanned it for codes yet?

------------------
'70 Mustang Mach 1 - '72 Mustang Sprint - '94 F-150

Please remember our sponsors,
Mustangs Plus, NPD, Osborn Reproductions, MyFordPerformance.com, and FordRamAir.com

IP: Logged

CometGT1974
Gearhead

Posts: 249
From: Asheville, NC USA
Registered: Jan 2002

posted 02-14-2003 08:53 AM     Click Here to See the Profile for CometGT1974   Click Here to Email CometGT1974     Edit/Delete Message   Reply w/Quote
Well, it's not the S.P.O.U.T connector or the ignition module...the computer is currently at a friends and he is testing it. If it is not the computer then it must be in the wiring harness!! Is there something in the distributor that could cause one not to advance?? Can someone explain this "Hall Effect" thing to me??

IP: Logged

CometGT1974
Gearhead

Posts: 249
From: Asheville, NC USA
Registered: Jan 2002

posted 02-14-2003 08:56 AM     Click Here to See the Profile for CometGT1974   Click Here to Email CometGT1974     Edit/Delete Message   Reply w/Quote
Oh yeah, I forgot to mention, I was talking w/ a technician down at the local ford dealer who I was told was "the man" on fords!!! I asked him a question that I already knew the answer to, I asked him if it were possible to put 63 289 heads on an 89 351W and he looked at me like I was crazy and said that it's not possible!!! Well, i've been driving the truck around for a couple weeks now, only problem is I can't get the damn thing to advance on it's own!!!!

IP: Logged

SteveLaRiviere
Administrator

Posts: 36138
From: Saco, Maine
Registered: May 99

posted 02-14-2003 09:11 AM     Click Here to See the Profile for SteveLaRiviere   Click Here to Email SteveLaRiviere     Edit/Delete Message   Reply w/Quote
The Hall Effect just uses the proximity of a magnetic field as a switching device, as opposed to an optically triggered device.

------------------
'70 Mustang Mach 1 - '72 Mustang Sprint - '94 F-150

Please remember our sponsors,
Mustangs Plus, NPD, Osborn Reproductions, MyFordPerformance.com, and FordRamAir.com

IP: Logged

CometGT1974
Gearhead

Posts: 249
From: Asheville, NC USA
Registered: Jan 2002

posted 02-14-2003 04:42 PM     Click Here to See the Profile for CometGT1974   Click Here to Email CometGT1974     Edit/Delete Message   Reply w/Quote
My computer guy told me that he didn't have the equipment to test every part of the computer but he tested everything he could and it checked out OK. He said the he thought that it could be the MAP sensor....the only other place I think it could be is in the distributer or the part of the harness that leads from the computer to the distributer. A buddy and I are gonna test for connectivity in the spout circuit and were gonna test the MAP sensor this weekend, hopefully we can figure it out.

IP: Logged

CometGT1974
Gearhead

Posts: 249
From: Asheville, NC USA
Registered: Jan 2002

posted 03-07-2003 05:00 PM     Click Here to See the Profile for CometGT1974   Click Here to Email CometGT1974     Edit/Delete Message   Reply w/Quote
The problem was in the wiring harness!! Come to find out there were two shorts in the wiring harness leading to the distributor, this was causing it to not advance the timing!! I'm glad this ordeal is over!!!

IP: Logged

SteveLaRiviere
Administrator

Posts: 36138
From: Saco, Maine
Registered: May 99

posted 03-07-2003 05:03 PM     Click Here to See the Profile for SteveLaRiviere   Click Here to Email SteveLaRiviere     Edit/Delete Message   Reply w/Quote
It's always the last place you look!

------------------
'70 Mustang Mach 1 - '72 Mustang Sprint - '94 F-150

Please remember our sponsors,
Mustangs Plus, NPD, Osborn Reproductions, MyFordPerformance.com, and FordRamAir.com

IP: Logged

All times are ET (US)

next newest topic | next oldest topic

Administrative Options: Close Topic | Archive/Move | Delete Topic
Post New Topic  Post A Reply
Hop to:

Contact Us | Mustangsandmore Front Page

Copyright 2003, Steve LaRiviere. All Rights Reserved.


Ultimate Bulletin Board 5.47d

Amazon Honor System Click Here to Pay Learn More

[Build a free Mustangsandmore.ws Home Page!]

[About M&M][Acronyms][Calendar][Chat][Classifieds] [Members' Pics]

[M&M Conventions] [M&M Mug Shots]

[ Mustangsandmore.com Bookstore] [ Smokin' Fords] [Tech Articles]