1994 7.3 turbo idi or ps? - Diesel Forum

CAT1150 · 12-12-2012, 05:22 PM

i just recently bought a 1994 7.3 turbo 5spd manual. ive read some places that late model 94 was really a powerstroke just w/o the badge mine is a build date of 6/29/1994. idk much about older diesels but it was a really good deal so i bought it up. so is this really a turbo or is it like the older ones where the turbo is bassically a engine ornament?

chuckster57 · 12-12-2012, 05:51 PM

8th character of the VIN will tell you for sure.

"M" is an IDI non turbo
"K" is an IDI turbo
"F" is a Powerstroke.

Mine is a turbo'd IDI and I can tell you the turbo isn't just eye candy.

CAT1150 · 12-13-2012, 08:01 AM

ok thank you it is an F! is there a way to straight pipe it without having problems with the exhaust back pressure? can i just slap pipe in where the muffler is? also is there a way to "turn up the turbo" ?

chuckster57 · 12-13-2012, 08:14 AM

Your truck has the smashed downpipe, just like they did on the IDI's. You can change it out and then run straight pipe if you want. Diesel engines don't need or like back pressure.

I would change the DP and exhaust before you did anything else. If you mean getting higher boost, I don't believe there is anything you can do. You may be able to adjust the wastegate actuator and gain a pound or two.

CAT1150 · 12-13-2012, 08:45 AM

ok. to change that out can i use one off like a newer 7.3? like 96 97? and how do u adjust the wastegate?

chuckster57 · 12-13-2012, 08:51 AM

Best bet is to buy a new down pipe, and then just have your local exhaust shop build the rest. When I changed the DP on a '95 a couple of months ago I had to cut the old one in half to get it out and it's probably true with the '96 and '97. IIRC it cost the guy like $75.00 shipped.

IF your wastegate actuator has a rod that is threaded, changing the length can change the pressure it takes to open it. Can't remember off hand which way to turn it right now.

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CAT1150 · 12-13-2012, 09:30 AM

got a website for that pipe?

**NMB2** · 12-13-2012, 09:44 AM

just an FYI for a "quick" identification. In 1994 the IDI came in only automatic, and PSD came in only 5spd.

**NMB2** · 12-13-2012, 09:45 AM

also. shortening that rod will increase boost.

CAT1150 · 12-13-2012, 09:53 AM

ok cool good info. mines a 5spd

chuckster57 · 12-13-2012, 10:33 AM

My customer bought a Bully dog DP on Amazon.

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CAT1150 · 12-13-2012, 02:19 PM

you have to hammer out the firewall quite a bit it looks like to put in a round down pipe?

chuckster57 · 12-13-2012, 03:20 PM

Not a lot. I used a couple of crescent wrenches and just bent the cab seam. Took me about 20 minutes to get the clearance needed.

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CAT1150 · 12-13-2012, 04:22 PM

Quote:

Originally Posted by chuckster57

Best bet is to buy a new down pipe, and then just have your local exhaust shop build the rest. When I changed the DP on a '95 a couple of months ago I had to cut the old one in half to get it out and it's probably true with the '96 and '97. IIRC it cost the guy like $75.00 shipped.

IF your wastegate actuator has a rod that is threaded, changing the length can change the pressure it takes to open it. Can't remember off hand which way to turn it right now.

Answered on my smart phone

IIRC?

444-4D · 12-13-2012, 05:06 PM

Quote:

Originally Posted by CAT1150

ok. to change that out can i use one off like a newer 7.3? like 96 97? and how do u adjust the wastegate?

A 94 Powerstroke won't have a wastegate.