HT3B vs s400 twins kits
 

Stock/HT3B Twin kit w/turbo
Stock/s400 Twin kit w/turbo

My buddy is trying to convince me to get twins because of all the towing I do. I pull a 10k horse trailer and a flatbed that I usually have at around 12k+ (have had it upto 20k). I found these two kits online. Both are affordable but I will have to save to get them. There is a $100 difference in the two kits. Which kit would be better with my current setup and what size injectors should I go to? Also will I need head studs to run this?

Which S400 based Turbo are you looking at?

:pca1:

a set of compounds would make the thing tow a lot nicer. Yes get yourself a set of head studs. I would go with 150hp injectors and not a set of jammers. I would go the s400 route.

My next purchase I had planned was a set of 110 DDPs. But I will go with the 150s to run the twins. Can I stay with my hybrid for this setup?

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I talked to the company, I can get a 71 or 75 s400 in the kit.

The K31 works great for a set of Towing Twins.

How much does a kit with a K31 run?

who makes the kits? If i may ask cuz im thinking of doing this to my pickup this fall

It is a company out of So Cal called Diesel Auto Power.

Sweet thanks

Stock turbo over anything is very restrictive. Even with a huge external gate, there's only so much you can do with this setup.

I would not go bigger than a 100HP injector with an adjustable box like a Comp or Juice. You will be at the limits of flow for drive pressures.

Skip the K31. It's better suited to a 64 sized top charger. Same thing with the GT4202. I prefer the S400 setup as the piping is cleaner.

Dave

K31 with a 62 works great for towing.

IMO,

not the best setup to be sure. Runs out of breath very early and on many trucks doing a tough pull, it's right in the RPM range that it's needed most. Most commonly, the 62 begins to over-compound and EGTs skyrocket.

This is not always the case. For small injector trucks, it works fine. But if they just want a really good solid towing set, it's hard to beat BD's twins to 450-500HP.

Again, JMO.

Dave

This is my daily driver so I am not looking to get any more than 400hp out of my truck. What I would like to do is lower my current EGTs on a good grade and have a little more power out my truck while pulling a heavy load. I am in the Military and living in Southern California so I need to keep my upgrade in the affordable section. I do not have the ability to afford the $4k plus for the BD twins and the parts required to use them anytime in the next year or so. What would you suggest with my limits in place?

I would say a great way to lower your current egt's is to get a better set of injectors. Is your dyno numbers with the jammers? If so you might have an issue there. I made 319 with my edge juice with attitude, and 354 with a set of industrial 24v injectors. With those injectors my egt's were much lower and drove well. A quality set of injectors goes a long way.

Funny how the 62/k31 Industrial Injection Towing Twin setup is rated at 350-700hp.

:pca1::humm:

Yes my number were with the current setup on my signature to include the jammers. My next investment is a set of injectors. I just need to make a decision on what size I need to run a set of twins. I don't want to have to buy them twice.

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This setup and the BD twins are way out of my current price range. I apprecate that you two are try to get me the best possible setup. Please remember I still have to get head studs and injectors to go along with twins.

look into a set of industrial or ddp injectors they make great injectors. Im goin up to ddp 150's this summer.

I am going to get a set of DDPs. Just working on the size to match up with a set of twins.

I personally think 150's would be good but they might be alittle big for your turbo

I agree, funny.

350HP- 400HP usable is about right. Put a 64 on top and then they really start to shine.

Remember, many of us have actually ran multiple setups in the real world and not just on the track or at a dyno event. But pulling trailers at low speeds to cruise on the highway to up and over the passes.

Dave

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For injectors I am running Vulcans. Way more economical and all the same power. In fact, my truck had a 3% opacity on the left pipe and a 5% on the right. Guess which pipe is shorter? :D

This was done with everything on KILL. But with a light foot.

Dave

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If that's the case, keep it simple.

A single 62 sized charger with a 14cm housing will do what you want it to. A set of compounds does not really net you much until you are looking at 450+. Again, JMO.

But, as mentioned, the HX35 over S400 is the cheapest of the cheap. I would run a 14cm housing though. And it will be severely limited at RPMs climb. But, it will spool fast and cool those temps. You will not need a very big injector with this setup either.

But if it were me, I would buy a single that could be easily integrated into a set of towing twins later. Something like a 62/65-14 or 13SS. BTW, we all started out only wanting 400HP. Even after adding 250+ more to that, some of us are still looking for more.

Again, JMO.

Dave

Yeah i just put a 62/71/14 on my truck. It cooled it down nicely even with my dirty crappy hot jammer injectors. I think it would be a good choice for what you wanna do. And it would make a good top turbo in a set of twins. I have only seen 1300 once with that turbo.

set of bd tow twins for sale used for 2000 I saw the other day

The 71 turbine makes for a tough sell once a large primary is used in most applications. For everyday driving they are fine, but for towing and low RPM use, they can get laggy and hot.

This does not mean this will happen, just something I have observed on my own truck. That things has had more turbos than I care to remember.

Dave

Hmmm I will have to remember that when i got to build my twins. Everyone i said that they worked well in a twin set up thats why i bought it

I don't have any issues with my 62/71/14 over s475 towing driving whatever. Egt's are cool.

Oh ok i was kinda worried for a moment

Being that you are from Spokane, or the Highlands area, elevation will play a factor for you as well.

Again, it does not mean it will be an issue, just something to be aware of. If you have a manual truck, it'll behave much nicer. This is where a smaller turbine on the primary can greatly help spool.

Dave

Yeah i got a handshaker in mine

That will help you out greatly.

Dave

Thanks for all the help

what's this "handshaker" that you speak of?

A manual transmission is a "handshaker" or a "mixer stick"

aaaaaaaaaaah ok

at 300HP I would not consider you a good candidate for twins. As Dave said its when you get above 400HP and tow then a single turbo becomes bit of a compromise. I don't like towing above 350HP with my 62mm. The truck runs better and cooler at a lower power rating. Doing a small turbo upgrade (in order of air flow) HX35/40, HE351, s300g or 62/65 turbo will work fine. Some airflow mods like a Tunnel Ram Intake plate that gets more air to cylinders 1, 5 & 6 and a 3pc manifold will bothe lower EGT about 50 degrees depending on mods.
https://www.dieselbombers.com/diesel...-manifold.html Basically it works like a mild port on the head.

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How much is that tunnel ram intake?