Very small 12 valve tow twins

madmikeismad said:
Did you ever get your setup working right? I remember you having problem after problem.
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Yeah pretty much I guess. I still need to fix some drive leaks and stuff and dial in the gate, but its working ok. I got a higher stall converter and that helped alot. My main holdback now is the pump, thats next on the list.
 
Big Blue24 said:
The BD towing twins will not break 600 HP to the tire fuel only. Lots of guys tried back in the day and the most I ever saw was 590 HP.

If I were in your shoes, I'd pick up an HX35, HE341, or HE351 and build a set of junkyard twins using an HT3B, HT60, GT4202, S472, S475, K31, or similar and have yourself a nice towing setup, capable of 600-650 HP, and spool-up like a stock truck!!!

If money wasn't an issue, I'd do an HE351 over S475.
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He341/gt4294 is quick on spool time. Love my setup. Both turbos gated also.
 
I have a 4294 so I'm curious to know what it can sustain power wise.

Monkey Fist Rage
 
Looks like I'll be using a 72/83-1.10 for my twins... The girlfriend and I exchanged presents the other night and a s472 just happened to be one of them!

All I need is a piping kit now!
 
SuperDave4x4 said:
Looks like I'll be using a 72/83-1.10 for my twins... The girlfriend and I exchanged presents the other night and a s472 just happened to be one of them!

All I need is a piping kit now!
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I run a S476/88 1.1 and a HE351 twin set-up. Spools fast and will support decent amounts of power. I have around $800 into my twins. The price is going to go up as I want to ceramic coat the turbine housings and exhaust piping.

I ran a 3 1/2in short 90 exhaust off the HE351 into the S476. The cold air piping was done in 3in shortly 90's and chunks of left over 3in straight. Most expensive part was the hydraulic hoses. I run a single 5in straight pipe exhaust, I just had to buy the chunk of exhaust that goes over the rear end. I had left over 5in piping from a customer truck.
 
Just made this hot pipe, I would guess that materials were around $260. Has anyone nickel plated a manifold and hot pipe? I'm looking for something that will hold up better than the factory coating on a steed.


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newsmoke said:
Just made this hot pipe, I would guess that materials were around $260. Has anyone nickel plated a manifold and hot pipe? I'm looking for something that will hold up better than the factory coating on a steed.


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$260 seems high? About $100 for the T-6 flange and about ~$50 for the flange and another $30 for pipe? That's only $180?


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Stainless diesel sells their flange for $145 I have at least $80 into the 351 flange and clamp, and I went through Jeff Moocow for the clamp. I haven't found anyone that beats their prices on Cummins parts. After all was said and done I still had to machine .020 off the flange to get the clamp to seat properly
 
Ghostman said:
Lots of online shopping. I can't remember exactly, but I think that's the most I paid for my pieces.


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I have seen a lot of pieces on eBay but don't know if there worth a flip.
All I have to weld with is a Arc welder. But I can make it look good.
 
Going with a super b (s300g) then I take it. If you don't already have the super b, I know a guy that has ran both back to back with better power AND spool out of the 351.. just food for thought. The s300 would be easier in a twin setup on the other hand as kits are readily available.
 
You guys sure pay a lot for materials. 3.5" exhaust tubing can easily be squares into t6 flange, and b stock u bends from Columbia river mandrel bends are quite affordable.
I made these with bends from CRMB.
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