Engine/Transmission (1994 - 1998) single turbo - which one? -vender?

[Reddog1]

I do not pull, or race. I do haul a Truck Camper, truck and camper = 10400 pounds. My mods are in my signature, and have been running the mods for about 5-years with a stock turbo.

I blew my stock turbo today (about 230,000 miles). I have controlled my EGTs with my foot. It would be nice to lower the EGTs. I have never had a reason to go over 30 pounds of boost, and seldom go to 30. I would like to stay with the 3-inch (stock?) down pipe, or reduce a 4-inch turbo to the stock down pipe.

1 What turbo do you suggest, and why?

2 Which vender do you recommend?


Wayne

 

[12V Ford]

I would suggest a pdr 35 or the pdr super 300.



PDR is a good vendor, but others have the same turbos too.



The pdr 35 has a bigger compressor wheel and the super 300 is just a s300g (57/65). PDR can upgrade your stock turbo for not too much.



Either one would work good, but I think the s300g would be better. You would need a 4" downpipe or adapt it to the stock downpipe.

 

[Reddog1]

Thanks for the input 12V Ford. I am considering the PDR 35. I would consider the super 300 if I could adapt it to the stock down pipe.


Wayne

 

[MMcCallie]

I agree on the S300G. It is a little bigger to keep your EGTs down but should spool well with your mods and I haven't heard complaints of surging when towing. How high do your EGTs get if you let them climb? The turbo does a great job of shoving air into your engine. Getting the air out is a restriction. I understand not wanting to have to change out your exhaust brake and resonator but it would be best if you could open it all to 4".

 

[Reddog1]

I ordered a PDR 35 this AM. Mark said that I should stay with my 12cm exhaust housing. He further stated, with 10400 pounds, I needed the quick spool the PDR 35 had, as well as lower EGTs at the upper end.

It all about trade off. Empty truck vrs. 10400 pounds. I decided to not trade my exhaust brake for the benefits a bigger turbo would give me. I use the exhaust brake much more than I would use the turbo.

On a steep or long climb, I can hit 1500 degrees pretty quick, with the camper loaded. It takes a lot to hit 1500 degrees empty, but I can. Very seldom is it an issue, then only because I cannot do 70 MPH on a long up hill with 10400 pounds.

Thanks for the suggestion on the S300G. Everything considered, I think I will see some improvement with the PDR 35.

In passing, it has also entered my mind on where California is going on the smog for our trucks. All other vehicles are required to pass a visual. If they do this with our trucks, a no-stock appearing turbo could be an issue. I sure hope not.


Wayne

 

[hsmith]

Think I remember reading the 12 valves were going to be exempt from the new Calismogmob.

 

[Reddog1]

Think I remember reading the 12 valves were going to be exempt from the new Calismogmob.

That is encouraging. At one time, I was more active in the Cummins mods. I was talking to a fellow that owned a shop with a dino. He had a contract with the Calif ARB, to work with them on smog research with the 12 and 24 valve. He said there was another shop like his in southern Calif. He informed me that at that point, everyone involved with their research, concluded the 12 valve engines produced less smog without the Cat. He further stated that at that point, they were considering not requiring the Cat on the 12v, if they required checks on our trucks. That was about 6 or 7 years ago, and I have been out of touch with him.

Guess I will do a search, on TDR, and/or start a new Thread on the California smog.


Wayne

 

[DRAG DIESEL]

Hi Wayne, Long time no see!!!

 

[Bob4x4]

The scuttlebut say the 98 and up will get smog tested. Any emission parts that were oem will be required

 

[Bob4x4]

I ran a pdr 35/14 for a while at 350(hp)/950 (torque) spool up was Very fast at that level. Temps were controlled by rt foot

 

[Reddog1]

DRAG DIESEL - Howdy. I'm still in the same place. Had to work commute to San Rafael for about five years. I am retarded now. I mean retired. I guess there are those that would say I am retarded and retired.

Judging by your signature, it looks like you have been busy.

If your in the neighbor hood, drop by.


Wayne

 

[Reddog1]

The scuttlebut say the 98 and up will get smog tested. Any emission parts that were oem will be required

I wonder if the 98 12valves will be exempt? Heard anything on that?





Wayne

 

[Reddog1]

I ran a pdr 35/14 for a while at 350(hp)/950 (torque) spool up was Very fast at that level. Temps were controlled by rt foot

I bought and installed the PDR 35. I still run the stock exhaust housing, 12 cm? My PDR 35 does not have the boost port drilled and tapped. Should it have been? It is simple enough to do. So far, it does not appear to need the wastegate, but I am thinking ahead when we have to smog the 12 valves.



My PDR 35 with the 12 cm exhaust spools much faster than stock. I am not sure if it has helped the EGTs. I still control them with my foot. I have not ran it with my camper loaded (10,400 lbs total). I am sure the quicker spool will still be there, but not sure what to expect EGT wise.



Mark suggested I not go with a bigger exhaust housing for my application (10,400 lb load). He thinks I will lose some of the quicker spool, and bottom end, if I understood him correctly. If I thought there would be an obvious improvement in lower EGTs, I would spend the $180. I would be willing to give up some spooling for lower EGTs.



Any thoughts on this? Would the 14 cm exhaust make that much difference in EGTs?





Wayne

 

[Reddog1]

My PDR 35 barks much more often than the stock turbo. I am having to re-learn how drive my truck, to prevent it from barking.


Wayne

 

[Curious Dave]

Yes... . Do tell... I have a 14cm laying around and am wondering the same thing.



Thanx guys.

 

[Reddog1]

Yes... . Do tell... I have a 14cm laying around and am wondering the same thing.



Thanx guys.

Does your 14 cm require a 4" down pipe?





Wayne

 

[Bob4x4]

I wonder if the 98 12valves will be exempt? Heard anything on that?





Wayne

:-laf I have a lot of customers with that same question,so far no concrete answer

 

[Curious Dave]

I don't think so... . But I am not really sure. It is the one that comes in the Banks kit. I bought the entire kit years ago. It took the truck from 3" to 4".

 

[Bob4x4]

I bought and installed the PDR 35. I still run the stock exhaust housing, 12 cm? My PDR 35 does not have the boost port drilled and tapped. Should it have been? It is simple enough to do. So far, it does not appear to need the wastegate, but I am thinking ahead when we have to smog the 12 valves.



My PDR 35 with the 12 cm exhaust spools much faster than stock. I am not sure if it has helped the EGTs. I still control them with my foot. I have not ran it with my camper loaded (10,400 lbs total). I am sure the quicker spool will still be there, but not sure what to expect EGT wise.



Mark suggested I not go with a bigger exhaust housing for my application (10,400 lb load). He thinks I will lose some of the quicker spool, and bottom end, if I understood him correctly. If I thought there would be an obvious improvement in lower EGTs, I would spend the $180. I would be willing to give up some spooling for lower EGTs.



Any thoughts on this? Would the 14 cm exhaust make that much difference in EGTs?





Wayne

The early trucks got the boost signal from the other side of the engine so not all 35's were drilled and tapped for the signal. You will need to be using the wastegate towing.

Above 300hp the 14 will spool up just fine and will give you a lil drop in egts. I saw a 25hp increase by adding the 14 housing.

The 14 housing bolts up exactly like the 12,no exhaust mods needed.

The drop in avg boost pressure will be small going up that little in size

 

[Reddog1]

Thanks for the response. Even though I can drill and tap for the boost signal, it might be easier to get the signal from the other side of the engine, using a "T".

I should have over 300 hp with my mods. Maybe I should try a 14 cm housing. I would use the non-wastegated 14 cm housing. Should I expect an obvious drop in EGTs, or just a small gain? I guess what I am really saying, is there $200 worth of gain?


Wayne