Thinking about twins...

[SRadke]

I see a bigger turbo in my future and I'm leaning toward the KSB1. My trouble is that I'm a little worried about being able to keep it spooled while towing. Would it be possible to use the stock HY as the small turbo in a twin setup? If so you should be able to buy a twin kit with all the piping and the big turbo for not a lot more money than a B series. Say $2000-2200?



Am I way off base here? I understand with the 9 cm housing on the HY you'll be restricted and there isn't a lot of extra space in the third gens but why shouldn't this work?



-Scott

 

[Agades]

I have asked myself the same questions

and wonder if that little hy coupled with a full B1 or the B2 wouldnt make for a sweet little runner at about 450-500 hp



I think anything over that HP , the hy would restrict too much



Ive asked "do I have to be using a box wide open to keep the B1 spooling decent?"



of course I only asked myself that and therefore have not gotten an answer

 

[SRadke]

I've tried asking myself and all I get is "Hmm, maybe, or perhaps". What good is that? Now I ask the experts. That's exactly what I'm thinking though. A fast spooling 450-500 hp.



-Scott

 

[BillGotthelf]

Guys your not getting any answers because I don't believe anybodies gone there yet. There is alot of info on 2nd gen twins and what works so I don't think you need to reinvent the wheel. You have plenty of room to work with. On the 2nd gen the manifold is turned upside down to power the smaller turbo up top and then down to the bigger turbo. So with an ATS manifold turned upside down on a 3rd gen it would work well. I believe you would want to enlarge the exhaust side of the 35. You want to run higher boost pressures on the street to keep smoke and egts down. On the strip you actually run less boost-who cares about smoke-you want max power. Turning up the boost with the 35 with stock housing will result in higher air temps. You may want to talk to Piers or Mark kendrick about the combos.

 

[KLockliear]

Why not just use what has already been proven to work? Or are you planning for higher HP in the future?

 

[SRadke]

I understand Bill that few people (if any) have gone there yet. I have very little experience with twins and what I'm really asking is whether or not the theory is sound. Will it work? If not, why not?



If you turn the third gen manifold upside down the turbo moves forward several inches. That's something else to consider. Also, I heard ehxaust housing options on the HY 35's are limited. Is that going to be a problem? All imput appreciated.



-Scott

 

[SRadke]

Keith, I'm concerned about spoolup time, excessive smoke, and high towing egt's. Has anything been proven to work as well as twins have on the second generation trucks?

 

[BillGotthelf]

Well on my 99 I ran the stock turbo, a PDRHX40 and a KSB1B. Now I have the KSB1B and a B2. I was warned about the Hx50 so I went to the twins. BIG change-my spoolup is very close to the Hx40 but if I am not careful I can spin my tires from the 1st-2nd gear shift thru 3rd. I am waiting for a 0-100 psi Boost gauge so I can see what I have. As I said in my earlier post I believe the stock 35 will not work well in a twin setup because of the restricted exhaust housing.

 

[KLockliear]

SRadke. I'm not going to start a crusade about singles vs. twins here... it ain't worth it but - go find a truck setup like you would set yours up and drive it. See if it's what you want/need.



Come to Vegas and we can show you what a single can do. Actually, Phoenix is close, let Fred Swanson show you. At the 500hp level, I don't believe twins are necessary or beneficial. We did test a set towards the end of development of the turbo we offer, and they didn't work as well as what Lawrence had developed.

 

[Greg Boardman-RIP]

I've been in Freds truck, that thing is a dog... ... ... ...

 

[SRadke]

Thanks Kieth. I'm not looking for an argument here either. I'm just trying to gather all the right info from people who know so I can set my truck up right the first time. I know you are heavily involed with R&D on these rigs and I appreciate you sharing what you've learned.



As for Vegas, I'll get there someday. I'm really considering a trip to Muncie this year so I may just stop in and see you on the way back. What's another couple hundred miles when you've already driven half way across the country.



BTY, the only way we can apply the word "need" to my situation is what I "need" to do to get what I WANT!



-Scott

 

[qzilla]

We have run Hy9/Bht3b, but that is the only combo we have played with. We did not have any spooling problems, but we also had more than enough fuel. I am not convinced that if matched right twins are that much better than a good single.



On N20 we made 619rwhp. That has been a while, we have stopped and are working on some neat goodies!

 

[Agades]

I would agree , for that HP level, twins may be a waste of time and money. especially with the good singles that are out now that are handling up to 600 hp very well.



but it sounds like something that would be fun to play with , if a guy had endless amounts of time on his hands , and deep pockets

 

[Piers]

I'm curious who is running a single 'charger at that HP level, and doesn't have temp or lag issues. . ???

Also here is a couple pics of our twin setup...



#ad

 

[Piers]

Second pic of twins...



#ad

 

[Piers]

Third picture ... .

this one is of an HX40, that uses the stock or aftermarket airbox.

#ad

 

[ChrisRyan]

Piers,I talked to Mark last week about twins for my 03 but he said it was going to spring/early summer before their ready to go out.



I'm really interested in when you will be ready so I can twin my truck.

 

[Jim Fulmer]

especially with the good singles that are out now that are handling up to 600 hp very well.



Just a little info for you'll, with my old Twin setup (35-18. 5/HT3B-26) at 65 psi and 674 hp and without water I could make 1850 on the pyro, I don't think there are many singles that can move that much air except some real high dollar hybrid that you can't drive across the country with... ... I'll stay with the Twin idea.



Jim

 

[Agades]

Originally posted by Jim Fulmer

especially with the good singles that are out now that are handling up to 600 hp very well.



Just a little info for you'll, with my old Twin setup (35-18. 5/HT3B-26) at 65 psi and 674 hp and without water I could make 1850 on the pyro, I don't think there are many singles that can move that much air except some real high dollar hybrid that you can't drive across the country with... ... I'll stay with the Twin idea.



Jim

sorry,



I dont have a clue of anyone running 600 hp on a 3rd gen with a single



I was eating and doing the peck peck method of typing and ...

well thats no excuse

I should proof read what I type



but

the word has been that the DD turbo has been handling 500 hp very well (not 600)

 

[SRadke]

Alright this is good info. Please let me throw a couple more questions out there.



If you were to start with say a KSB1-03 as a single how much modification would be required to use it as the upper turbo in a twin setup later?



Kieth, any possibility of a twin setup in the future using the turbo in your current kit?



Thanks to everyone with the patience to answer my questions.

-Scott