Differences between early99 and late99-03 trucks

[powerstrokes only]

They started the door badges in the Fall of '98, I got some and put them on my early 99 that was built in like 3-98. It was a 6spd and it had a cooler, it also had a whole lot smaller turbo than my 99.5 and had A LOT LESS power too I only kept it a year.

[99bigred]

the turbos were the same size, just different wheel. ours is by no means slow and it has a banks chip. the previous owner pulled an 11k 5th wheel toy hauler and said he could pull it 250miles back from glamis with the cruise at 60and never downshift and never slow down. that doesnt seem slow to me

[strokin_early_99]

The turbo is smaller than the late99. The injectors are smaller hence the lower power rating. However the differences between the turbos is an advantage since it does not surge that easy at all.

Here is some good reading: The TheDieselStop.Com 1999-up FAQ

[99bigred]

i read somehwere on here that the wheels were diferent but could be swapped. how can a bigger turbo use a small wheel?
that site said 235hp, is that at the wheels? the valve cover on mine says 250hp

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Last edited by 99bigred : 01-30-2008 at 09:30 PM.

[strokin_early_99]

The wheel is the same, yes. But the housing is larger on the 99.5. See for yourself:

[99bigred]

ok i stand corrected the later ones are bigger. how do they make more boost when they use the same wheel? with the banks chip i can get it to 21psi uphill at wot and cruising at 60 it runs 16-18. are those good numbers?
anybody know if the 235hp is wheel hp? what do the late 99s valve cover say for hp?
and that other site says all late 99s had passenger air bags, early 99s dont? how do you know if you do?
thanks

[strokin_early_99]

The late99 does not make more boost than the early99. My early99 stock turbo with a banks big head would make 32psi but I was running real tuning.....

Yours sounds kind of low even for banks tuning.

The bigger turbo does not flow more air but the housing made it whistle less, some said it was annoying.

My truck has passanger air bags. Look above the glove box, there should be the outline of a flap with a stamp in the vinyl that says "SRS".

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Last edited by strokin_early_99 : 01-30-2008 at 10:35 PM.

[J-HO]

fromm 1999.5 to 2003 were there any engine changes? I herd that connecting rods were changed?

[alabamafrog]

Mine hit 28-30 psi with stock injectors and 32 with my new injectors. I hear banks stuff is way overpriced and kinda weak. I have a key switch above my dash drink holder to turn the passenger air bag on or off and there is an orange “off” light that lights near the key when the truck is first started. I hear that in 2000-2001 they changed the rods from forged to powder which only matters if you’re hitting like 450+ hp. older model forged rods are better of course.

[99Smokin73Stroker]

The 235hp is not rear wheel rating. It is a flywheel or crank number....probably crank.