My thoughts from 275's to DD2's

[Sky]

Well After about a week of the switch I am not all that impressed for the extra $600. 00 overall.



~I lost the low end grunt pulling my trailer around. The 275's are much better combo for people that tow.

~The DD2's do smoke more, but this doesnt really bother me.

~I lost about 1mpg in milage pulling my trailer.



The overall power increase wasnt as much as I thought it would be. But there was a power increase AFTER i got the truck rolloing. If I were to do it over again I would have just stuck with the 275's and saved $600+.



Mike

 

[Ramafid]

Thanks for the info. Makes my decision easier. Get a bigger fueling box.

 

[abledog]

Sky



How heavy is your trailer and what axle ratio are you running?



Terry

 

[Snow man]

Sky,we had dd3's in my dad's 01 for 2 weeks,and dropped back to dd2's due to the tiny HY turbo,and smoke being a little to much,I was dissapointed in how much hp we lost when we dropped back dd2's. It sure felt more like 40hp was lost than 20 that DD shows on their site,the dd3's seem to have a lot more low end,and mid range than the 2's do,I know what you mean when you say the dd2's have no low end. My dad's truck is weak off the bottom in comparison to mine,even though he has the quicker spooling hy35. Egts didnt drop much either although we never towed with the dd3's in his truck. The dd2's on the good side,never stall,smoke a lot less than the 3's,and still have quite a bit more snot than the stock injectors did.

 

[TxDieselKid]

Mike



I notice in your sig, it says "EZ Comp Box". Is this the Edge Comp box? So it sounds to me like your kinda saying that the 275's are better from the stop then the DD2's? Is this true with the Comp set on 5x5?



Andrew

 

[JR2]

DD3's rock..... especially with a Power Edge and an EZ. I went from 275's to the 3's and I will never go back.

 

[Sky]

Originally posted by abledog

Sky



How heavy is your trailer and what axle ratio are you running?



Terry

I only pull about 3500-4000lbs about 3 times a week for a total of around 700+ miles a week. Axle is 3. 54. I use to get 12. 5 to 13 consistanly now Im down to 11. 5 to 12. This includes town deliveries and hwy driveing.

 

[Sky]

Originally posted by TxDieselKid

Mike



I notice in your sig, it says "EZ Comp Box". Is this the Edge Comp box? So it sounds to me like your kinda saying that the 275's are better from the stop then the DD2's? Is this true with the Comp set on 5x5?



Andrew

Yes its the edge comp box. I always just use level 1x5 when towing. Yes the 275's IMO are better from the stop. But I did have a faster 0-60 time with the dd2's. Once I get out of the hole its ok. But I am not seeing the difference as much as I thought i would from the 275's. Yes with the box on 5x5 I thought I was faster off the line with the 275's then the dd2's. But like I said once i get rolling the 2's kick in.

 

[1BIG44]

Thanks for sharing the info.



I have been thinking about swapping my 275's for something bigger.



As my primary concern is towing I might just stay with the 275's.



Nice to get a little real world experience on this.





Wes

 

[TxDieselKid]

Originally posted by Sky





Yes its the edge comp box. I always just use level 1x5 when towing. Yes the 275's IMO are better from the stop. But I did have a faster 0-60 time with the dd2's. Once I get out of the hole its ok. But I am not seeing the difference as much as I thought i would from the 275's. Yes with the box on 5x5 I thought I was faster off the line with the 275's then the dd2's. But like I said once i get rolling the 2's kick in.

ok guys, is it just me or does it sound like he needs a Piers HX35? I think you are not getting enough air, and this is what's causeing your results. With the 275's, the HX, or HY is great, but when you start adding more fuel, the need for air goes up too, even more so with that Comp.



What do you all think?



I have always thought that the ultimate towing rig(being pratical here) would be a Comp, DD2's, and a PiersHX35. Just my thoughts, but who am I?



Andrew

 

[Snow man]

Andrew,tin our 01 we had the dd3's,and an EZ, it had the HY35 turbo,it rocked with the dd3's,we dropped to dd2's and it lost a lot of power especially low-to midrange torgue. If air was the problem the dd3's would not have performed well at all. i have a stock hx35 turbo on my 2000,and dd3's,and a comp,it could use a bigger turbo,on level 1 when towing,the turbo is fine,there is no EGT problems until i use power levels 4and 5.

 

[TxDieselKid]

Snow,

Well if your HY worked great, look at this thread from HVAC a while back about how well the B1 did on a 2001 with DD3's, and a Comp.



Things that make you go hhhmmmmmmm



Andrew

 

[Snow man]

Andrew,it didnt work great,but it was powerful,it only has an EZ also this makes a big difference. We dropped to dd2's,because the hy was to small,it smoked to much with the dd3's. IMO the dd3's outperform the 2'd (seat of pants) by way more than 20hp. Those same dd3's hardly smoke at all in my 2000,with the Hx35,even on level 3 of the comp there's just a haze at night. I really wanta B1,dont temp me any more than I am already.

 

[TxDieselKid]

Snow,

Thanks for stepping in and telling us(me) about this. Like i said, i thought that might be what he needed, but you proved other wise. Better he found out now rather then $1,600 later and still not be pleased.



Andrew



P. S. Snow, this is for you...

 

[Sky]

I was really interested in the B1 turbo too, but a couple of guys went down to May Madness and said it had a lot of turbo lag. They said they thought it was "really bad". Its hard because a lot we hear here on the board is a bit of "marketing" for products. If you know someone who has one I would try to test drive it before shelling out $1500 bones.



I did drive a truck with the same mods as mine and he had a hx40 i have the hy, These hy35's are very snappy off the line compared to a hx40. I could walk all over him from 0-60 any day.

 

[Snow man]

Sky,any bigger heavier shafted turbo is going to have more lag,it the guy with the 40had powerbraked some boost off the line he would have blown by your truck as soon as full power could be applied. Ive heard Hurt has a smaller housing for the b1,and that even the bigger housing spools faster than an HX40/16,but it would b nice to be able to try one before you drop the $$.

 

[KatDiesel]

Originally posted by TxDieselKid

ok guys, is it just me or does it sound like he needs a Piers HX35? I think you are not getting enough air, and this is what's causeing your results. With the 275's, the HX, or HY is great, but when you start adding more fuel, the need for air goes up too, even more so with that Comp.

What do you all think?

Well I had a PDR HX35 ... it worked great for what I needed it for, still couldn't supply the air I needed (which I knew before buying). If Sky wanted a PDR turbo I would say look into Pier's HX40. Personally I like the B1... yes it is slower off the line due to its size, which makes it extremely durable, but I thought it was pretty good, I only really noticed it at the dragstrip. I have not tried the smaller housing B1 yet, working on Kurt for that one, anxious to get one to see the temp drops associated with the B1.



Let me talk to Kurt Sky, might have something for you to try.

 

[abledog]

Sky

Part of the problem may be the 33" tires and 3. 54 axle ratio. The 24V seems to like higher revs. I try to keep the revs on my truck(6sp,4. 10,275's,VA and propane when I can find it cheap) between 2000 and 2300 rpm on the highway. Unloaded I get between 18 and 19 mpg avg. , pulling my 13,000 lb. 5th drops this down to between 12 and 13 mpg as long as there are no long grades to pull.

"IMHO"

Terry

 

[Floor It]

The 2 trucks that I rode in have B-1's in them and there wasnt any lag,that is with the fueling box on. Any of the bigger than stock turbos will have lag if you turn the fueling boxs down or off. I cant wait to get my B-1 on

 

[Sky]

Originally posted by abledog

Sky

Part of the problem may be the 33" tires and 3. 54 axle ratio. The 24V seems to like higher revs. I try to keep the revs on my truck(6sp,4. 10,275's,VA and propane when I can find it cheap) between 2000 and 2300 rpm on the highway. Unloaded I get between 18 and 19 mpg avg. , pulling my 13,000 lb. 5th drops this down to between 12 and 13 mpg as long as there are no long grades to pull.

"IMHO"

Terry

I do keep my rpms in the 2000 range. You have the 275's also. I am willing to bet if you went to dd2's you would lose milage. I just took a 400+ mile trip today with no trailer and got 16. 5 MPG where before I was gettting about 20-21. I am really bummed out. With as much driving I do (about 40k a year) I may go back to the 275's.