1996 OBS No Pulling power
 

Ok went ahead and put in the TS 6 position switch. Helped on power of course. With a 24 foot gooseneck it pulls ok till I hit a hill. Then it seems to lug hard. 1150 on the pyro in 4th is no problem... it is an automatic. It will make about 9 psi of boost lugging in 4th. If you down shift to 3rd and spool it up it will make 16 psi all day..... Now put this same trailer behind my 2000 F-250 and it does not even seem it is behind the truck on the same hills. I tried it the other day and my 2000 did not even come out of 4th and was gaining speed on the same hills..... Any suggestions on some way to make it get a little more power in the ole 96 would be appreciated.... Thanks Wayne

What gearing do you have in the OBS?

they just put in a new set of 354s i believe

That's half your problem right there...

It did not pull with a crap before when it had 410s either.. It just doesn't seem to want to accelerate in 4th if you load it much..... He change the gear to help fuel mileage.... against what I told him.. but you know some people think they have a better idea.... this truck ran better before he had the 7.3 replaced due to a couple of bad cylinders...

my 95 manual with the ts chip vs my 01 automatic with the chip pulls pretty close to the same. you wouldn't think it, the 01 is so much smoother and you really think you are outpulling the 95, but i've been loaded with identical loads and trailers, and i look in the mirror and the ole 95 is hangen with me! the 3.54's will kill your power and also if you didn't change your odometer gear (i guess they got a gear, i never changed ratios on my fords), you would be showing a lower mph then you really are going so that might make you think it's not pulling as hard maybe??? i do know the power delivery is way different with both my trucks. i think the 95 would pull a dam tractor trailer load but it seems like it doesn't get up to speed as quick as the 01. idk???

As for the speedo issue I checked it with my gps and it is only 2mph off. I also pullled my trailer with the 96 then went back home and swapped to my 2000 and ran the same road. I just had to so as to have a real comparison. My issue is that the 96 will not go ahead and make boost in 4th gear and trying to accelerate with out downshifting when with the same trailer and load my 2000 goes ahead and gains speed ..... just wondering if anyone had any ideas ... i appreciate all the replies sometimes its easy to miss things ... so thanks again

I think you are just comparing two different trucks... They will never equal eachother... There is a difference in gears, the OBS ones are too small. The SD is heavier. Gearing per gear is different. Turbos are different. Injectors are different. Is the SD chipped? If so it's making more power... See where I'm going with this? Way too many variables...

OBS...90cc AA injectors....

SD...140cc AD injectors....

Mo powoa...

Yes I understand that it is not comparing apples to apples.... Just was wondering if anyone had any idea about the 96 not going ahead and making boost when in 4th..... it will not go ahead and make anymore boost without downshifting into third...... thanks

higher RPM's higher boost... Luggin in OD will make less boost than locking out OD and raising the RPM's...

Answers.my question also

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Thanks fellas

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Any suggestion of what I can do to hook up my ride 1996 f350 gas

to correct your speedo's, you have to reprogram your psom. there is no geear for them, it is from your your rear abs sensor in top of your pumpkin that reads a permanent magnet in your rear end.

my 95 doesnt make the boost in 5th gear pulling hills (or even 4th) like my 01 does in o/d or drivemy 95 might make around 15-16 tops winding it out, probably less than 10psi in 5th gear. where my 01 will make 20lbs easily on tow mode in any gear. but like i said, with IDENTICAL trailers and loads, my 95 isn't that far behind on the bigger hills around here where i live but we don't have huge mountains on the east coast like the west coast! put some 4.10's back in it, and it eat!!!

Your chipped powerstroke is only making 16psi?! Something is wrong.

I concur with the above though, downshift if you have to to bring rpms (thus, power and boost) up.

my chipped 95 is only making 16psi. chip may be messed up, gauge may be messed up. i dont care, the truck makes me money and i dont drive it anymore so piss on it!!! and it will run with alot of newer trucks, so i really dont think anything is 'wrong' with it.

well the 16 is low. but my 94 Powerstroke wouldn't do much better when i was towing.

Ya it's only running damn-near stock boost levels and half of what a chipped truck should be running.. no biggie :P

I wouldn't jump to the conclusion that anything is wrong... If you downshifted and gunned it, I bet it would make more than 16psi... Towing in 5th gear isn't going to bring the boost...

These aren't 5.9 Cummins that make 30psi at 1800 rpm. I have owned a couple obs 7.3's and they like to be wound out when they tow. My 96 was a 5spd and if it wasn't above 2k rpm it wasn't going to pull anything.

Ya thats true they do need to be wound out to make power. I was just assuming this guy never saw over 16psi since thats what he claims his truck makes.

i drive these trucks everyday, the boost gauge could be off a little, or the chip may not be as good as some, i understand that...if i really wind it out when towing in 4th gear, it may make around 18. i've driven lots of these trucks, and for the obs i don't think that is crazy low but like i said before. its dependable and tows the weight just fine, so i'm really not concerned with it. i have 170k on it and counting, i'm the 2nd owner and it has towed heavy since day one. my 01 makes boost alot quicker and alot more of it if i want it to.

Technically, since our OBS trucks have the wicked wheel stock, they should make boost quicker ;)

I'm just saying tho.. I personally hate having that dont work right, so knowing my truck is boosting half of what it should be would irritate the hell outta me

i don't think the OBS have the "WW". the E99's do. even then. the "WW" actually flows less air to try and control surge.

OBS have the wicked wheel. Thats why our turbo's are in essence better than superduty turbo's even though they are more or less the same, minus super duties have no WW.

Although I cant comment on flow rates of the WW, I do know that they spool up a lot faster and control surge better. The E99's have the ww because they are basically an OBS with having several carry-overs. All I know is people with stock OBS turbo's boost 26-28psi chipped, and around 32psi with injectors.

i don't know about spool up faster. the name wicked wheel makes it sound cool. it flows less air to help prevent surge.

idk about everyone else, just going what mine is. but like i said, my 95 making 16 or 18lbs of boost will dam near (dam near!) keep up with my 01 that makes way more boost. boost doesn't equate to more power all the time fellas. i'd rather make less boost with the same power!

and yes, i put the ww on my 01, and it does seem to make boost faster and does control the surge, but doesn't TOTALLY eliminate it. the 95 doesn't surge at all.

i would have put a ported compressor housing on it.

No boost doesn't always equal power.. but when your talking the same two basic turbos, it pretty much does. More fuel requires more boost. If you aren't fueling, you aren't boosting.

Like I said, the wicked wheel helps with producing boost faster. I love how my '97 has no surge hehe

You also have a 1.15 exhaust housing which means slow to spool...

And to clarify, the WW does not spool quicker, and moves less air then the factory wheel on the superdutys...

does the surging hurt anything? i changed mine out, but if i knew it didn't hurt anything i think i'd just left it alone and turnt up the radio!

I recently installed a TS 6 pos in my 95 5 speed and i have never seen 25 psi on my boost. It does get up and go a heck of a lot better! Still it doesnt pull up hill as well as my 1st gen.

How much do you boost? It should definitely be in the 20's with stock injectors, and with stage 1's or greater, 32+psi.

surge is hell on the bearings in the turbo. side to side play is alright, as long as there isn't a whole lot. but any in and out is bad.

Yep surge is horrible man

trust me, i know. i have a surge issue when i tow. i have to shift at a higher RPM than normal. just to keep it from surging as bad.