Which twins for towing???

[Blue Thunder]

I know this topic has been discussed at length. But I wanted some specific information.



Looking at sig. , Who's set of twins would tow the best? Preferably, a package that includes all necessary parts and accessories. (intake, exh. manifold, etc. )



I'm looking for a simple kit. No major mods ar fabrication.



The sets I've seen are BD and ATS. Are there others?



What twins have you used??

 

[Fishin Guide]

I know this topic has been discussed at length. But I wanted some specific information.



Looking at sig. , Who's set of twins would tow the best? Preferably, a package that includes all necessary parts and accessories. (intake, exh. manifold, etc. )



I'm looking for a simple kit. No major mods ar fabrication.



The sets I've seen are BD and ATS. Are there others?



What twins have you used??

Lots of players out there now. For towing, I prefer a smaller secondary and thi will give the best performance for the mild HP level with fast spool. Also, cruise temps tend to be lower with the smaller top.



Dave

 

[JJPage]

I would look into Arctic Air Twins, they utilize your stock turbo into the mix, that keeps the price down. They have had some very good reviews also.

 

[Blue Thunder]

Thanks.



For those of you the BD set-up, How much fuel do they need?

 

[Jim Fulmer]

http://http://www.industrialinjection.com/id45.html



These! Even if I were building a set I would use these turbo's!



Jim

 

[Blue Thunder]

These are some good products. Tell me why you like them over another?

 

[Jim Fulmer]

http://http://www.industrialinjection.com/id45.html



These! Even if I were building a set I would use these turbo's!



Jim

The top turbo speaks for itself and it doesn't take long to see how many are being used right now. The bottom turbo has the quick spool up to match the SPS 62 but the topend of a K-31 wheel, I've seen the setup with my own eyes. Both turbo's are wastegated so you have complete control of the system, also there are a few extras like a bung in the cold pipe for a boost guage and blow off valves in the intercooler pipe just incase you might need them but are used primarily as a safe guard.



Last I think the turbo setup is under rated for max HP, look at what each are capable of as a single.



Jim

 

[OPoole]

I have been playing around with a HTT62/12 and S400 turbo set-up

 

[Idaho CTD]

If I was building a really quick spooling set up I would go with a stock turbo and a GT4202 wastegated. The next best would be a stocker over a S400/B2. Honestly there is very little gain to be had by going with a 62mm S300 instead of your stocker unless you go with the S400 as the primary and even then it's only going to show up over 600hp. The 62 will make less back pressure then the stocker but a K31 makes more than a GT42 or a S400 (and flows less). I ran the stock/S400 set up for 2 years on my 04. 5 and would still be running it if I hadn't built a stock/GT42WG set up as well as a bigger set up. Using your stock turbo also saves you about 1/3 of the total cost versus two new turbos.

 

[Cummins724]

I would only consider the II setup or Opooles set. They are awesome kits! The other sets won't compare in overall performance & warranty will be there when you have problems. The 62/12 turbo in the kit spools as fast as the stocker yet outflows it by far.

 

[Idaho CTD]

I would only consider the II setup or Opooles set. They are awesome kits! The other sets won't compare in overall performance & warranty will be there when you have problems. The 62/12 turbo in the kit spools as fast as the stocker yet outflows it by far.

Do you have any proof or is this your opinion? Those of us that actually build twins for a living know what works and what doesn't. II doesn't build their own stuff and they are trying to sell stuff so of course they want you to spend 5k+. I have probably built and run more combinations than anyone so atleast I have some basis for my opinion. You can ask Summit on here if he thinks changing from a stocker/S400 to a 62mm S300/S400 was worth it. I bet he tells you for the cost no it wasn't.

 

[Fishin Guide]

Gotta agree with Idaho. I know he's done jusst about every possible configuration and after seeing his work, it's top notch.



I also found that a stock sized charger over the S400 worked very well for me.



I would be curious if an external gate would help performance enough to justify it's expense.



Dave

 

[Bandit1]

i have my stocker that i put a hybrid kit on (35/40) over an s400 with an ext gate. spools very fast and cools well. i would stand behind Idaho CTD in a heartbeat for quality and knowledge. he helped me out with questions i had on my setup.

 

[12V Ford]

IMHO, if you are going to actually tow with twins, a stock size turbo is about as big as you want to go for the top turbo. Anything bigger is just going to spool slower. I pull often and at 5,000 to 9,000 ft elevation, those big turbos just spool too slow. I've always heard that twins will spool slightly slower than your top turbo. Besides, if your pulling you can't use all that hp and the more hp you add, the less reliable it is.



I have an ht3b for the bottom turbo and it seems to work fine. If I had the money I would try an s400, but I don't know if it's worth it.

 

[Idaho CTD]

Dave,



An external probably isn't worth the cost. It can help lower drive presssure and can run cooler but it wont fix the tight turbine housing/wheel on the HX35.



This thread is about towing and what works best. What works best for towing is to get on top of the turbos early. Then you have to work around the sizing to get whatever top end power you want and hopefully not sacrafice spool up. Nothing off the shelf works perfect for everyone as everyone wants different things from their truck.





The S400 is better than the HT3B but the plumbing is all different and for the average guy the small gain in spool up/hp/ and reduced temps isn't worth it. Plus the HT3B is WAY quieter than the S400.

 

[NoSeeUm]

My set-up tows very well, not a 3rd Gen though. I would aggree that a smaller secondary (edit-oops) would tow better. From my experience, I get more than enough air flow to more than manage EGT's. I am glad I opted to keep the Dodgezilla vice the added expense of a s300 hybrid.



Like Idaho says, the s400 has a very noticeable whine until it is spooled up. My truck makes quite a bit of whine until boost goes over 15 psi or so. 10 psi of boost is about the loudest. I use that noise as a key for when I can lay more fuel into it and not smoke out my co-travelers without having to watch the boost gauge.



Jim

 

[Blue Thunder]

Top.

Just thought I would bring this topic back up to the top to see if there are any updates??????

 

[231jasonS]

Well like Carlos is looking for about what im looking for. Except Id like to use my WSB which is about a 57mm s300 based kickarse turbo. It spools better than the stock IMHO and i thought it would make a killer twin set up.



I dont know if a HT3b would be the best match or something else. I have a wastegated housing and a non waste gated housing for the WSB.



Id like to keep about 600 HP cool with out sacraficing spool up when im not useing the HP.

 

[ThrottleJockey]

I don't think 'spool up' is a factor in towing a heavy trailer. How fast we can ramp up the RPMs on a dual set of chargers is a sacrifice I would be willing to make to keep my EGTs in check, which is the purpose of a set of twins.



One should strive for two turbos spinning at half speed to deliver a 'colder' charge of air.



Not some exotic combination of hybrids accelerating at competition engine speeds.

By the time I'm at the end of the merge lane with the fiver, the ole Hx-40 and HT-60 are rollin'!