Towing Twins

[Blue Thunder]

Who's got them, And where did you get them??

What are you Running?

 

[TRAMPLINEMAN]

Right now I've got the single Super B and just ordered the second for the twins setup. I ordered them thru BD-www.dieselperformance.com

 

[reddge]

I have had mined for 5,000 miles and thinking going back to the signal “B” not as much power but a lot quieter than the Twins and easier to work on.

 

[Blue Thunder]

Reddge,

Please explain!!?



I am mostly interested in lower EGT'S. I have all the fuel/power I need, but can't pull a long grade with my 40' 5'er. Heck, I can hardly accelerate to highway speed durring hot weather (90's +) without my engine temps rising to near danger level. Even with an HX-40, water/meth. , and my box on the lowest setting, I still have a difficult time keeping EGT's under 1400 while pulling a grade.

 

[Scrappy]

I think Reddge is way underfueled for twins, he would probably like them better if he put some fuel to them. at your level it is almost mandatory to run twins to keep cool.

 

[Todd T]

I have PDR's Street/Strip twins. I think Reddge is way off base and the exception to the norm. other than a bit of lag (hx40/ht3b), twins are the only way to tow. its called usable power and with twins you have way more of it. I can hold speed uphill with a 10K TT behind me and never go above 1200*



with a single i had to charge the hill about 10MPH fast and gradually slow towards the top to keep it cool.



same thing on accelleration. more usable power and with lower EGT's.



Noise? twins are half the noise of a single with an open element filter.

 

[Partyat33]

I have my own set of HX-35/12 and BHT3B/22 and as far as towing goes I could not be happier. Except for big hill you usually stay under 1000 degrees. Now thats cool air.

 

[TRAMPLINEMAN]

Blue Thunder, I have the same problem you do with towing. Just today I changed my thermostat, clutch fan and am going to clean the radiator. I'm hoping this will help some, but I should be getting my twins anyday now.

 

[Todd T]

what i left out was on a level grade i run 600-700 degrees at 72MPH. my sweet spot is 2100 RPM's. the only trouble i noticed was on back roads at 55MPH or slower i had to go to 4th gear to pull the hills or it would heat up trying to lug it up maintaining speed.



like i said "usable power" you'll have almost double what you have now.

 

[Blue Thunder]

That's what I need. So, what are you running, and did you buy a kit or did you do it your self? I am leaning towards buying a kit, possibly from PDR.

 

[reddge]

Reddge is way off base and the exception to the norm.

Reddge is way off base and the exception to the norm.

Well let’s start over?

My first up-grade was 275 injectors. They were the only things available at the time. They did help a little. Then I added Banks power pack the complete kit. I liked the power and the economy dynode at 298hp 645 ftlb of torque. With this setup it pulled good but the Egt’s would run up to 1,400+ with the Ottomind it would defuel back to 1,300. I ran this for 60,000 miles.

Then I changed to BD single turbo with the 275 injectors it ran real good with lower Egt’s . This took 4 hours to install.

I would get up to 1,400 it would take a long hill and be going a lot faster. I changed to BD comp injectors (90hp) and you could feel the power difference but it liked to smoke a lot. The Egt’s were about the same. I did not like the way it idled. It was like it had a hot cam in it and the fuel economy went down.

Next changed to BD Twin Turbo. This is a 12+-hour job.

This is the ultimate for towing. This dynode 440+hp and 880+ torque with the Comp Injectors. Max Egt’s 1,250 no matter what hill or how long. It would still smoke too much for me. I changed back to the 275 injectors lost some power with a lot less smoke and a smooth idle. I’m running the stock air box to keep the turbo noise down.

You have to remove the air filter and intake pipe to change the oil filter. It is difficult to work on; you can’t get to any thing on the turbo side.

Look up TDR#47 page 138 and TDR #48 page 138 this is REDDGE

 

[BMancin]

Twins

I have a B1/B2 setup back ordered from PDR. They fabricate everything, and even give you choice for color for the tubing.

 

[RonA]

A kit that uses an external wastegate is something to consider.

 

[BPINE]

A kit that uses an external wastegate is something to consider.

Although I think you can have better control with an external wastegate for towing heavy loads you can't open the wastegate at all. I have tried several wastegate combo's Although internal and bottom line is when towing I just have to turn it off. I can control my internal wastegate very well.

 

[RonA]

I am not sure what the problem is where you have to shut the boost off to the wastegate. I guess it must only show up when you tow well over 10k. Mine is opening at around 20 psi and works fine except for the drive pressure. I have noticed that the externally gated setups are able to run around 50 to 100 hp higher with the same egt levels. But then again that is not towing. I don't run over 40 psi towing. With my trailer that is enough to go well over the speed limit just about any where. Above that the driveline noise makes me uneasy.

Ron

 

[BPINE]

I am not sure I have all the answers but I have tried many things and so far this is what works the best. My combo is 23,000 lbs ready to go and under full load I run about 50 lbs of boost at 1200 degrees. In high altitude or the heat of the day I can not tow as fast as I would like so the quest is still on for more useable HP.



I know that the 24 valve seems to work better than mine and the 3rd gen even better. Bottom line is I need to flow more air than my ported 12v can flow.

 

[RonA]

My ported 24 valve runs hotter than that. I'll try more air, if that doesn't do it I'll try less fuel. Maybe both!

Ron

 

[BPINE]

My ported 24 valve runs hotter than that. I'll try more air, if that doesn't do it I'll try less fuel. Maybe both!

Ron

I will tell you one thing I bet less fuel would cool thing off but that wouldn't be fun would it.



By full load I did not mean full throttle, probably only about 3/4 at best.

 

[dsather]

Bpine



I remember reading about when you got these twins from Piers. Towing twins, is it the HT3B and PDR 35? How is the spoolup unloaded (running along 60 mph and giving it half throttle real quick)? Did you ever have to oring the head? What kind of boost are you running?



I'm looking to make a decision on a set of these, not because of towing heavy but because of the quicker spool up. Thinking about sing a B2 on the bottom.



Dennis

 

[BPINE]

My head gasket is still stock, I replaced it about 70k ago when I took the head off for port work but put a . 010 thicker stock gasket back on.



I am running 55 to 60 lbs boost and the spool up while on the freeway is instant. I have been changing a few things around lately and am going back to my original 35-14, 3b-23 combo. It has great drivabilty for daily driving with that combo and less smoke.