Well not done yet....maybe run on sunday. I have both the hx35 and the ht3b mounted. So far I m ver happy with it. The 3b is rather heavy, but I was able to mount it very good, so no weight is on the hx 35 at all. I have my own mandrel bender so do most of the ducting is pretty straight forward. The 3b drain worked perfect. The only real questions at this point are the oil feeds, cause its sunday, so what ever I have in the shop Ill have to make work. The 5 inch down pipe looks like it s gonna take some time........but I think I can get it through there.

The question will be the need for an external gate on the 3b, I have two aftermarket gates, but I didn t have time to get flanges cut, so right now, I thought I d try it less gate, then ad it if I have to? I could cut a flange with the plasma cutter.....but that will be last.

So far total investment is rather low.....and I think I could duplicate for under 2000.

 

What size turbine housings are you using on your turbos? The 35/ht3b setup that interests me the most is the 35/14wg and ht3b/23 as that doesn't need an external wastegate to run fine.

 

What if you ran the stock Hx 35 with the wastegated 12cm2?

 

What boost pressures are safe with twins and stock heads and gaskets?

 

I'm not certain how it'd work with the hx35 and the 12 as it is a bit of a restriction, however somebody showed before that their wastegate was enough to allow the ht3b to run properly. So if you were willing to live with the high EGT restriction the 12 creates it may work properly. I'm not very certain about this setup, the best thing to do is find the thread here about that, I remember Don M. was in it.

Around 50psi a stock head gasket is pushing towards its safe limit, sure you may be able to run higher but the question is for how long.

 

I think Ryan on this board has it running.....he uses the 26 housing .....I almost went with the 23, but after talking with ryan I went with the 26 also.

Ryan was making 510 rwhp and 1100 ft lbs about.

I have the oem 12 housing. I don t know how well it will work....but compared to just my hx35 #10 plate etc....I expecting it to be a lot better.

It will be nice if I can tow at more then 1/4 throttle.

I ve been told that 50-55 psi is ok for towing and daily use, and 60-64/65 psi is the outside max .

well.....back to work

 

I would talk with Ryan about his set-up. They were built around the concept of towing. Spool-up and EGT management are amazing.

Matt

 

Thats my purpose too.....I pull a rather large trailer.

It has never done poorly mind you, but I think this may be as good as you can expect for a reasonable cost. I tow a 1/4 throttle, on hills I just hold it right on 1200 degrees......hopefully that will be different.

 

I just ran my truck past 1500rpm today after getting my twins on last week. I'm running the hx40/ht3b setup. That ht3b at 4000rpm sounds like a jetliner taking off. It's enough that I could have died then and been happy just hearing it. After I initially got the turbos on I had to take them out twice and the plumbing out about 15 times before all the kinks and bugs were out. Everytime you think it's done you see something else. Hopefully it'll work right the first time for you.

I've heard for the most part that you'd prolly be best keeping your boost under 55psi or so on a stock head gasket... and make sure the truck is at operating temp before it sees it. I have the 26cm exh housing on my ht3b, What size is yours?

 

FWIW, I blew the stock headgasket on my 96' Dodge CTD
12 valve at 65lbs. of boost when I was running the single
B-1 turbocharger awhile back.

---------
1320:

I recommend checking your drive pressure on the twin
system too. That is "good to know" information and can
affect the way the system performs.

Good luck.

---------
John_P

 

superduty12v, I went with the 26 housing also, agter I talked to Ryan. I think he had used both the 23 and 26.

4000 rpm! holly cow....I rarely run mine past 3500.....how does it perform from 2200 to 3000? Thats ussually were I tow at.

I will check the drive pressure, probably in a few weeks. I hope I don t have to take things apart....my arms are sore from the ht3b curls I did mocking it up. I got the 5 inch down pipe done, but still need to do other plumbing, well back to work.

 

I was initially running an HX35/16 non wg and an HT3B/26 non wg. With the injectors and box that I have it was a really well ballanced set up. I could tow at 23k gross and leave the box on 5x5 with no temp issues. The max boost I saw at WOT was 70 psi, loaded the max EGTs were around 1175°.

 

I'm going to be running a 35/14 - 3b/22 very soon.

It's a setup close to Ryan's, but centered more for towing. Spooling the big charger harder.

50PSI is the general accepted limit for the stock headgasket.

I'm running haed studs, and o-rings, so I feel safe running 75PSI. Which, I think I will hit easily.

$2,000 isn't bad.
Depending on where you get your turbo's from would depend on the price. Sometimes you can pick up a '35 for $100, sometimes not. Same with a 3B...

Merrick

 

Merrick, I ran the 35/14, ht3b/22 for a while and the big turbo spools quick. By 15 lbs of boost in the air horn the big turbo was spooling. It is hard to control total boost with the 22 bottom housing though unless you dont have a lot of fuel. As far as stock head gaskets go mine is still alive after more than a year at 65 lbs of boost, even with towing in the mountains. Make sure it is fully warmed up before you bring the boost up. Tim