"F" 250 as the ultimate tow rig! Can it be? Reply #15 – February 23, 2017, 08:57:55 AM Its been over a month so just wanted to check and see if you had made any more progress. Quote Selected
"F" 250 as the ultimate tow rig! Can it be? Reply #16 – April 05, 2017, 05:11:25 PM Quote from: Aerocoupe;459429Its been over a month so just wanted to check and see if you had made any more progress.A few things have come up, tranny rebuild X3 until I finally got the ZF right. What a bear! My father died unexpectedly. Really slowed things up quite a bit. I do have some more updates and a few pics to throw out there. Just been stupid busy! Quote Selected
"F" 250 as the ultimate tow rig! Can it be? Reply #17 – April 06, 2017, 03:29:36 PM Oh man, sorry to hear about your pops...that really sucks.Sounds like the trans was an unholy battle. Anything in particular kicking your butt or just one of those Pandora's box slash Murphy's Law deals? No rush on the replies as we know you have a plate full. Quote Selected
"F" 250 as the ultimate tow rig! Can it be? Reply #18 – April 08, 2017, 11:57:13 AM If you look a few posts back, I thought the pilot bearing was toast....turned out that the input shaft had been slightly bent or warped. This took me forever to find and fix. I ended up dropping a few grand into the tranny at a shop to figure it out. I was not so happy about it....but what do you do? I had the tranny in and out about 5 times. What a bear! This thing ain't a T-5, it has some gerth to it! Quote Selected
"F" 250 as the ultimate tow rig! Can it be? Reply #21 – April 10, 2017, 03:05:57 PM Super clean man!! Quote Selected
"F" 250 as the ultimate tow rig! Can it be? Reply #22 – April 11, 2017, 07:26:02 PM How are the highway Roma and mpg? Cool setup so far. Quote Selected
"F" 250 as the ultimate tow rig! Can it be? Reply #23 – April 12, 2017, 12:30:08 AM Quote from: Haystack;460295How are the highway Roma and mpg? Cool setup so far.Haystack, assuming Roma is road manners? Quite well! Rides very smooth after a new set of shocks and 55lbsof air in the tires. Mileage.....not quite sure. I have been chasing a weird CEL since getting it running. I'm beginning to think that I may be too far out of the tune on the factory computer. I cannot find a single thing wrong with any sensor. Engine codes change every time. First the tps, then the IAC, then the ECT. It runs smooth and well but always smells rich. I'm gonna tear the upper intake off this weekend and maybe find something in the vacuum lines, like holes. That the only other way I can explain this issue. Then it will be time to hit the open road. It cruises well at 70 MPH turning 1900 RPM and sounding smooth and quiet. I'm assuming that may be the sweet spot, but I bet it's more likely 62-67 MPH for mileage. I have owned 3 of these trucks and all had the best mileage including the diesel at that speed range. We will have to see. Quote Selected
"F" 250 as the ultimate tow rig! Can it be? Reply #24 – April 17, 2017, 12:44:14 AM Found the intake manifold gasket settled and compressed more than I thought it would. I retrocede all bolts and viola. Vacuum leak, found and conquered, at the exact same time. Adjusted timing, TPS and idle quality. Found it needed quite a bit more fuel and obliged with 50 lbs of fuel pressure on the 19# injectors. I think its time to throw the 24# back at her again and see what happens.Towed my racer to the Drags in Barona California and its up some serious grades of 4-6% or more at a couple points. The 351W just does not have the beans I thought it would. It needs to be over 2500 RPM to really gain some steam. I was underwhelmed actually which just lit a fire under my a$$ to finish up the 393W and get it swapped in with a conversion to MAF. I have a computer and MAF from a 1993 Cobra that would work well here and should add quite a bit of adjustability to the equation.Thoughts? Quote Selected
"F" 250 as the ultimate tow rig! Can it be? Reply #25 – April 18, 2017, 08:48:38 AM Trying to run a 351W on 19lb injectors is like feeding a quarter horse Cheerios...yeah its got oats but not what the horse needs. I would say that the truck needs to go to a tuner and put it on a dyno with a wide band O2. I only say this as my little 306 ran out of steam on 24 lb/hr injectors at about the 280ish rwhp / 290ish ftlb mark on a Mustang Dyno. Popped in the 42 lb/hr injectors with a slight retune and it hit 300ish rwhp / 320ish ftlb and the idle was 100% better as I was not up on 100% duty of the injectors. Quote Selected
"F" 250 as the ultimate tow rig! Can it be? Reply #26 – April 18, 2017, 07:35:40 PM 19's are just a no go on this thing. I had to run the fuel pressure close to 85#s to get it to run correctly. I have a set of 24#, but I'm wondering if that is futile. May need more! A tune would be great, but I do not have that kind of cash at this point. Looks like for a truck it costs quite a bit more than a car. I was quoted $750 from JBA and that includes Dyno time. Not really what I'm looking for. I wonder if 24# and mass air might correct the issue. Should I start looking for a set of 30's? Butt Dyno is all I can afford at this point. Quote Selected
"F" 250 as the ultimate tow rig! Can it be? Reply #27 – April 18, 2017, 07:38:57 PM BTW, I noticed that with my fuel press gauge installed on the schrader it was jumping around and that when the key was turned off, the fuel press went immediately to 0. I thought the rail maintained pressure. Not sure if the jumping on the gauge is the bank to bank vs the SFI I am used to. That is 4 injectors firing at once and not 1. Quote Selected
"F" 250 as the ultimate tow rig! Can it be? Reply #28 – April 18, 2017, 08:17:07 PM What fuel pump do you have? I would call Pro-M and talk to them about a calibrated MAF. They can help you with injector sizing. That will avoid a tune but in the long run that is what you need. I would go with an SCT tuner as they are usually $500 for the chip and initial tune.Sell your 19's and matching MAF. Sell the Cobra ECU, MAF, and 24's. That should get you close to paying for the Pro-M MAF. Whatever size injector you need you should be able to source used online. Quote Selected
"F" 250 as the ultimate tow rig! Can it be? Reply #29 – April 18, 2017, 10:22:30 PM My stock fuel pump had a check valve and held pressure, even when the pump was only pushing 12psi. The new pump didn't and immediately went to 0 when the car was shut off.I think the newer pumps just don't use them. Quote Selected
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