Engine/Transmission (1998.5 - 2002) How are BD's Twins

[RKraft]

I am wondering who is running BD's twins and how do you like them? I am thinking of twins this coming spring or early summer. I have a Edge drag comp to install and was thinking 130 or 150 hp injectors. Oh yea a Con FE will be installed also. My goal is 500hp, I know once there I will want more :-laf. Any information or suggestions are greatly appreciated.



Randy

 

[Reb.B]

they work nice, spool nice, install is a snap, but 500 HP and up, no way. You need a bigger set or a big single

 

[AK RAM]

The only people who complain about them are the people that don't run them... ... or people that run big singles with nitrous to overcome it's inefficiency. :-laf There was a discussion about them in the 3rd Gen forum not long ago, here, and several 2nd Gens that are running them chimed in as well as some links to another forum with some 2nd Gen BD Twins users. There are better and much cheaper sets out there, but you will see guys approaching 600hp with them on # 2 and they do fine.



There is some good info in that thread. Check it out.

 

[Blacksdieselhp]

I bought a 2000 model 2500 truck with a set of bd twins on it. Not to give a company a bad name or anything, but mine SUCKED. I took them off and put a Bell USB on that I had laying around and it was a lot stronger. I also had a 2001 with a set of my twins which are almost just like what Piers sells and they were just awesome. I think that is the Ideal setup for a high horsepower truck that will be daily driven. it spooled great, EGT's were really good and it pulled HARD on top. It dynoed 608 hp. So I would definatley go with a set of Piers twins or something similar. Definately will never run a set of BD twins again. Theres really no point.

 

[RonA]

I'm running a setup that is using a similar secondary charger. It works very well. 500 is not a problem. If the BD setup is not doing that the primary would be to blame. I was told their primary put out almost as much air as a 3b. Interestingly enough my first aftermarket turbo was a Bell USB. It was terrible. Seems like some people have good luck with certain things and some don't. I am using a Bell WSB as a secondary and have no complaints.

 

[Blacksdieselhp]

Thats true, some things work for some people and others don't. It doesn't make sense but its true. I didn't really like the Bell USB either. But belive it or not, it worked better than the BD twins I had.

 

[Dave Ratcliffe]

The only people who complain about them are the people that don't run them... ... or people that run big singles with nitrous to overcome it's inefficiency. :-laf There was a discussion about them in the 3rd Gen forum not long ago, here, and several 2nd Gens that are running them chimed in as well as some links to another forum with some 2nd Gen BD Twins users. There are better and much cheaper sets out there, but you will see guys approaching 600hp with them on # 2 and they do fine.



There is some good info in that thread. Check it out.

AK RAM,



Just curious, I've seen BD twins advertised new for under $3k for 2nd Gen's. Who else makes affordable twins? Thanks.



Dave

 

[RPA]

bd twins

I am running the bd twins with bd 155hp injectors and an edge drag comp. I do not know what the rear wheel horsepower is but if not at 500 it should be close. Hopefully one of these days it will make it on the roles and I will know for sure. I think that the adjustability you get with the comp box gives this combo excellent street manners as well as the ability to play on demand. Spool up is excellent. Just make sure you have the fuel supply to feed those injectors.

 

[RKraft]

RPA,

you are running close to what I want to, how is it towing if you tow? What are the highest egt's you have seen and what settings work best from the comp? Thank you all for your info and opinions they are all taking in consideration. I am also thinking PDR towing twins.

Randy

 

[DWeiler]

I'm interested in a set of twins too,one day,few other things to take care of first(KORE-pace). Don' know much about them yet but i have starting to read/gather as much info as possible. BD are suppost to be good for 500 usable HP,maybe 600. Truck is paid for but i dont want go into debt again for now to satisfy my craving for twins,i'm saving for the Kore for install in the late spring early summer. If i do decide to go for the twins,probable get the ported head/APR studs/hotrod vp/mach 4's and then decide what vendor to use/buy from. I do tow the TT so they would have to be towing friendly but i would still like to surprise a few Fords around here. Right now i have my B1-2-tow on and i am happy with it,i don't know if i can use it in a twin setup or not,don't want to sell another turbo again,if i could use the one i have now it would definetly help keep the cost down. Right now i think alot that of members have recommended PIERS. Goodluck with your decision and let us know how it works out for you. MERRY CHRISTMAS

 

[RPA]

RKraft,

The only thing I have ever towed on a road that amounts to any kind of weight is 2 1000 gallon anhydrous ammonia tanks about 16,500 lbs. 40-45 mph is the most you can run these wagons so it is not like pulling a big gooseneck. But, just play (hard) with the hooked up you can reach about 1050 (preturbo) by playing I mean starting out at the bottom of the hill about 20 mph lugging the hell out of it until about 45mph just to see the boost build and smoke roll.

The highest I have ever seen the gauge was 1450 when I sled pull.



I have found that I like level 3 sub 4 for normal driving. This gives you excellent response but still decent mpg. FWIW, when the truck was stock it got 16. 5, with all the bombs, it still gets between 16. 0-16. 3 and I have had as high as 17. 8 on the interstate. Although my stock milage probably would have been better with the transmission I have now.



I have not found much of a difference milage between levels 1-3 on comp. But the lower level are nice when traction is poor because tires break loose very easily.

 

[RKraft]

RPA,

Did you use there exhaust manifold,stock or other? Also I really don't tow to much other than a TT thats about 8500lbs, but I do service work for the local farmer's for spare income and have towed trailer with all the disc gangs for a 25ft disc to assemble at an other location. Also pull a New Holland LS190 skid steer a few times in summer months. So from the sounds of it they will work fine for me. PLease if you have time either reply or send me a pm.



Thanks,

Randy

 

[daveg]

BD tow twins

I have had the twins now for about a year and a half. The driveability is excellent, however there are still egt issues when pulling long 6% grades with 22k gross. When running EDM mach 1. 5's and an Edge EZ stacked on a TST PM3, the TST needs to be on "0". It is still easy to reach 1300 deg +. I have found the best combo is rv injectors and TST on level 3, no Edge. Pulling a 6% grade at 60mph at 1200 deg is not a problem with this combo.



When running an Edge Comp and EDM mach 1. 5's, the Comp was off. When running the Comp and DD supermentals, high boost (55psi +)was an issue when running empty and level 5X5.



I have removed the 1/4" wasegate actuator spacer to cut down on boost (wg starts opening at about 20psi with this spacer removed) which helps control the high boost issue but then egt's are to high when towing. This twin set-up needs that spacer as designed.



I made a 1" stand-out wg cover to allow the wg to open much more. This not only helped with the high boost issue, but also eliminated the exhaust leak from around the cover which was a big issue especially when using my exhaust brake. All the turbos with this style wg cover that I have seen leak when using an exhaut brake. I now have this cover and bolt kit in stock.



I hope this helps. If I were to do it again I would use a HTB2/12 as the secondary turbo and a HT3B as the primary. High Tech Turbo will have this twin setup available soon.

 

[sparks57]

If it were me, I'd use an S400/B2 as the primary.



The nice thing about using the htb2 is that you can upgrade the compressor down the road if you need more power... but s300(htb2)/s400 twins are the way to go IMO.



I would put an external wategate on the htb2 to bleed off some drive pressure and spool the s400 faster.



And I would neck down the 5" downpipe on the s400 to 4" for better torque.



A twin setup like that will spool fine at the 500hp range, and with an upgraded compressor or a 5" exhaust, it would support much, much more.

 

[AK RAM]

I now have this cover and bolt kit in stock.

How would someone go about purchasing one? Got a web site or through PMs?

 

[TurboTweaker]

Randy contact Spicyjam i think between him and I we can make you a set for less than a BD set.



The Fat Kid

Andy