Cummins HE351/HT3B Twins Build

[stevewes2004]

I wanted better spool than the II Silver 62 I had, with good top end, and the ability to support around 600hp. So really my only option was TWINS. Its not complete, but making good progress. I should be done within a week or two. Here are the pix i have so far.

Gutted

Some parts

two 55psi pop-offs with weld-on bungs

soldnoid plug for the HE351

manifold is painted with VHT paint

manifold flipped

got my big turbo oil feed and drain on

oil drain for the 3B

got this housing for the HE with a spring wastegate, the cold pipe, hot pipe, and the 3B from a guy on another forum. saved me a lot of work!! which is good since i have a little one at home with limited time off.

ordered a 5" exhaust to match the 5" downpipe required for the 3B

turbos unfinished with the exhaust housings removed

mounted up the exhaust housings/hot pipe to fab the down pipe

more to come..........

 

[Benjie]

very nice.

 

[BRUISER]

looks good so far.. I will be watching

 

[1stgenxxx]

My eyes got really big when I started looking at the pics.....then I heard my auto tranny screaming from the driveway. What other mods to you have done?

 

[stevewes2004]

thanks guys. i've got 200hp ddp injectors & a drag comp + supporting mods. ive got a single disc SB clutch but i really need a dual disc. im going to retorque my factory headbolts and hold the pressure at 55psi til i get Orings and studs. even then i know my headgasket wont like me

 

[iluv_mud]

i like lol makes me wish i hadnt sold my dirtymax cuz that was my next plan for it damn u economy

 

[braxton357]

im going to retorque my factory headbolts and hold the pressure at 55psi til i get Orings and studs. even then i know my headgasket wont like me

Keep dreaming.

Looks really good though. Putting it all together in the truck is when it gets tricky.

 

[stevewes2004]

i know of a few people running 55-60psi with no problems with the factory bolts retorqued to ~130ft. lbs. obviously running on borrowed time tho.

i can imagine it being tricky. i'll def need an extra set of hands when i go to put the turbos all back together and in the truck.

 

[stevewes2004]

hey braxton. i saw your twin build, are you running just one battery?

 

[Spence]

These going to have enough flow to effectively relieve you of unwanted pressure?? I see higher pressures in your future as a result of low flow rates.

 

[stevewes2004]

most likely not. i'll also be regulating boost with the right foot. i got these pretty cheap, but the good thing is, if they dont work to good, i can just take em out and install some that better suit this application.

 

[braxton357]

hey braxton. i saw your twin build, are you running just one battery?

I did for a month or two then bought new ones and mounted them under the bed in front of the pass rear tire. It's great. So much more room to work with all around, should have done it when I first bought the truck. Am going to switch to some better injectors soon too. The 150hp edge injectors just make a lot of smoke and not much else. Let me know if you have any other questions or need anything specific, still have some parts laying around.

 

[Hurdt299]

While you've got it apart, it would benefit you greatly to put a 3 piece exhaust manifold on the truck. It's not a matter of if the stock manifold cracks but a matter of when it cracks.

 

[stevewes2004]

true, but the budget for this build has been met i'll wait until i'm forced into it unfortunatly

 

[Hurley]

boost regulation with your right foot's gonna suck

It's like trying to "only put the tip in", before you know it you're buried to the hilt and about to blow

 

[stevewes2004]

boost regulation with your right foot's gonna suck
It's like trying to "only put the tip in", before you know it you're buried to the hilt and about to blow

haha. that has to be one of the funniest analogies i've ever heard

 

[Pinkston]

Cant you set the edge up to defuel at a certain psi?

 

[stevewes2004]

Not my comp. I think the juice does that.

 

[stevewes2004]

here are some updated pix:
got the flange welded on the downpipe

oil drain for the 3B

got the turbos coated and the 3B put together and mounted

bout halfway done polishing the HE and my intake horn

 

[snappy]

Looks awesome. Is that heater core hose on the drain? If it is, speaking from exper. here, you will want to change it to something that is oil res. Had one on my last buggies turbo with the little kink in it and it swelled after a while and pinched off. Not hating hoping to help....

 

[stevewes2004]

well im glad you pointed that out, yea it is. i'll be looking to change it pronto. i didnt even think about it being oil resistant. here are some more pix:

 

[stevewes2004]

any idea where to buy oil resistant hose? besides ordering it.

 

[snappy]

What size do you need? I might have some left over.

 

[stevewes2004]

3/4" prolly 18" or so

 

[stevewes2004]

i can order it for 1.00 an inch but i just dont wanna wait for it to get here