Engine/Transmission (1994 - 1998) Pump Modification Question

[lpearson]

I have been playing with several things to tune up the H. P. and torque. But this elevation (6000') is really putting a cramp on things.



I can get lots of fuel into the engine; but the EGT's and smoke are to outragious. (EGT's hit 1700* once short time). Even with the fuel turned up that much, there is no more power, it just comes to the end of itself, and blows black unburnt clouds out the tail pipe.



I love reading about everyones power increases and how they got them. So------------------ my question is can "pump work" improve what I have or does it just increase fueling? Oh, just put on a AFE stage 2, helps with EGT's somewhat; down 75*WOT.



What do you all think?



Lowell

 

[Forrest Nearing]

timing can help EGT's, but more fuel will generally just mean more heat...



might I suggest adding another turbo?



water injection (straight water, no methanol) would work really well also.



Forrest

 

[gwagner]

you might just have to get a bigger turbo (or a bigger housing for the one you have) to help burn some of the excess fuel you have goin in.

 

[Forrest]

We're in the high altitude crowd Lowell.



Pump work didn't improve EGT. Consult with the PDR gang ... a 40 sounds like it's in your future.



I went from a stock 35 to a stock 40 & got tons of EGT releif. The PDR 40 is light years above the stock 40, but I don't know how it compares to your PDR 35, especially @ altitude.

 

[lpearson]

Originally posted by Forrest

We're in the high altitude crowd Lowell.



Pump work didn't improve EGT. Consult with the PDR gang ... a 40 sounds like it's in your future.



I went from a stock 35 to a stock 40 & got tons of EGT releif. The PDR 40 is light years above the stock 40, but I don't know how it compares to your PDR 35, especially @ altitude.

The PDR 35 works well at this altitude. I did have a PDR HX-40 for a while. Loved it when it came on. But was scary to drive. Lag was sooooooo long that passing or merging was nail biting, then all of a sudden-------wham and off we went.



I went back to the smaller turbo. Twins would be fun. But I don't have the $$$$$$.



Thanks for the reply and info about pump work, I kind of thought it wasn't going to help my air problem.



Lowell

 

[lpearson]

Originally posted by gwagner

you might just have to get a bigger turbo (or a bigger housing for the one you have) to help burn some of the excess fuel you have goin in.

Love to, (Had one), but the lag is too long. Wish I had the air you have. Ha.



Lowell

 

[1dslram]

You are definately in the must have twins crowd. You had a 40 and the only way to get less lag and more air is twins.

Bruce

 

[Forrest Nearing]

yup, at altitude, twins are the only way to fly IMHO... (they kick ass at sea level too of course! LOL!)

 

[lpearson]

Originally posted by Forrest Nearing

yup, at altitude, twins are the only way to fly IMHO... (they kick ass at sea level too of course! LOL!)

Don't scare me to much. But what kind of $$$ for a good twin setup?



Lowell

 

[lpearson]

Originally posted by 1dslram

You are definately in the must have twins crowd. You had a 40 and the only way to get less lag and more air is twins.

Bruce

At this elevation what two turbos in combination would you recommend. -----------------and is there anyone out there in the Denver metro area that has a good reputation to put them on?



Or did you guys that have them install them yourselves?



Thanks,

Lowell

 

[Forrest Nearing]

Originally posted by lpearson

Don't scare me to much. But what kind of $$$ for a good twin setup?



Lowell

build one yourself... stack an HT3B on your current turbo... if you or someone you know is halfway decent with a MIG welder, you could get out from under it for under $1k... figure a few hundred for the turbo, a few hundred for the wastegate, and a few hundred for "misc" and you're in business.



Forrest

 

[mdivincentis]

Sheesh, I wish I was at only 6000' Oo. (at least when I'm watching my EGT gauge)



Up here the 35/40-16 has lotsa lag and EGTs are real high.







Matt

 

[Forrest Nearing]

heh, it'll be interesting to see how my HX40-16 does this summer in the 8-10k ft range... I can already tell it's gonna be a smoke show!!! LOL!



we've got a cabin in the rockies that's just shy of 9k



Forrest

 

[lpearson]

Originally posted by mdivincentis

Sheesh, I wish I was at only 6000' Oo. (at least when I'm watching my EGT gauge)



Up here the 35/40-16 has lotsa lag and EGTs are real high.







Matt

Are you up near South Park, or are you at a ski area?



Lowell

 

[lpearson]

Originally posted by Forrest Nearing

heh, it'll be interesting to see how my HX40-16 does this summer in the 8-10k ft range... I can already tell it's gonna be a smoke show!!! LOL!



we've got a cabin in the rockies that's just shy of 9k



Forrest

Forrest,



You might want to tie a bucket to the tail pipe so you can catch all that unburnt fuel; that way you won't have to stop at the filling station



When I had my PDR HX40 up at Steamboat Springs here in Colo. It was very hard to get going. It was almost nothing or it was hang on Nellie we're going for a ride.



Summers are great here in Colorado, wish I had a cabin up in them there hills.



Lowell

 

[Forrest Nearing]

we're blessed to get to spend time up there in the mountains every summer... my grandfather bought and added onto a cabin in box canyon in Mineral County right around when I was born... stone's throw from the Rio Grande. when I was about 10, they sold that one and built one on the hill to the west of Creede.



I'm not really a big fan of winter weather, but the Colorado rockies during the summer is heaven on earth as far as I'm concerned!!!



I had my '91 CTD up there two summers ago... it had the 21cm housing on it. down here (Dallas, ~300ft ) it would give a decent puff of smoke when you first romped it... up there it looked like a freight train taking off!! my '97 puts out a lot more smoke down here... it'll be interesting to say the least, but I won't be pulling anything, and the truck is pretty light by CTD standards, so I think it'll be interesting/fun as opposed to interesting/concerned



Forrest

 

[lpearson]

Originally posted by Forrest Nearing

we're blessed to get to spend time up there in the mountains every summer... my grandfather bought and added onto a cabin in box canyon in Mineral County right around when I was born... stone's throw from the Rio Grande. when I was about 10, they sold that one and built one on the hill to the west of Creede.



Forrest

Nice country!



Lowell