Artic Twins / Kendricks

[Scrappy]

you could upgrade your turbo to a B1 or some othe small aftermarket turbo and then some places sell kits to use that turbo in twins (B1= powerbypoole) or Mark can fab up a custom set using whatever you go with. I have a B1 and am going to eventually get it twinned using that turbo.

 

[RCC]

So what would you rather have? A 700HP D-max that is more or less a 1/4 mile/dyno queen, (at that HP level due to the NO2) that cant tow a trailer at probably more than 400 HP without EGT probs. Or a 600 HP daily driveable day to day HP on diesel only that can tow trailers at that HP and not have to worry about EGT's or power without spending time and money getting NO2?



Ive seen my fair share of D-max's and they run well, but everyone of them are NO2 dependant past 500-550 HP. I havent seen what they are doing with the twins yet but I think I can figure it out, but daily at that HP they are having some issues with the strength of some of the internal parts.

I would never want a dmax,its not the motor, its the transmission i do not like. I have seen many modded dmaxs with aftermarket transmissions that will not shift under power and 5th gear always seems to be problematic. I am diehard dodge,I believe it is the best truck to do what I do. The disheartening thing about it is at dyno events people new to the diesel sport see my twin turbo dodge get out dynoed by a basically stock dmax,they are like wow why spend all the money when i can just add alot of gas to a stock truck. We all know the dmax will not last with the egt's and other related problems,but alot of new people dont understand this, they just see "800hp dmax with a stock charger".

 

[Mark_Kendrick]

Thanks for the responses everybody. I still have a few questions though. Is it possible to replace my stock 35(?) with a good turbo and then upgrade it to a set of twins or is kind of a package deal only? I talked to Piers a few days ago and they told me their wasnt much that I could do as far as modding the stocker in an 04. 5. I do understand that I can make a set of twins using my original turbo and another one but is it gonna be the real looser in my plans to make high HP? I have been told that you can find some good deals on ebay for singles from time to time but I am worried that I would just end up with a mild/moderate turbo that I would be unhappy with down the road and end up forkin over the cash at the end anyway. I guess im sayin id like to start cheap if possible but I will be doin it either way.

the cost effective route is twins first. You spend near $2k on a good single and only $3-3. 5k on twins.



Not to say the big single is wasted, but you get more reliable power from twins for daily use because of reduced EGTs and boost/drive pressure levels at high output.



I build twins using about any big single you could want but they are much more expensive because of the extra turbo. Buying the single first allows you to swallow a chunk of that pill in advance.

 

[michaelRitz]

the dmax lovers just make us look better in the end

 

[cmonroe]

Let me start by saying I am a CUMMINS NUT but I've driven Duramaxs up to 800 hp on diesel only. They are by no means dyno queens, well tempered good daily driver. As far as the Allison transmissions having shift problems when built correctly, no they have no problems with "hainging shifts", they also when built properly perform well. As far as compound turbos go. I firmly believe you either have to have a divorced waste gate like Mark has mentioned to control drive pressure or you would need to greatly enlarge the waste gate bi-pass hole and valve on a stock turbo housing. As far as not studding your head for twins??? I quess if you know your drive pressure is under about 50psi you would be OK. Over 50 psi I would not chance it. The stock head bolts I believe are still streach to yield.

 

[mattymac]

I've driven Duramaxs up to 800 hp on diesel only.

Was it clints truck?

 

[Mark_Kendrick]

Was it clints truck?

Clint's truck has been one of the top performing D-max's for 3 years. It's the only Chevy I've ever thought went TOO fast

 

[fox]

Doesn't that truck run a fuel additive? What is it.

 

[Mark_Kendrick]

When I rode in it it had Nos but he wasn't running it. He doesn't need it but it helps on the dyno.

 

[mattymac]

I thought he was running mid to upper 11's in it on the bottle?



I also thought that daves D-Max was a bit faster than clints? Low 11's?

 

[cmonroe]

I've seen 806 rwhp on diesel only with the cp3 mods on his Duramax. Some Duramaxs are faster in the 1/4 mile that his sure, keep in mind of his lift, tires ect.

 

[mattymac]

I havent heard of a D-max in the 10's yet so if there are faster trucks they arent that much faster?



Daves truck barely beat clints truck on the dyno (This was a while ago though) Dave was right at 800 HP and clint was 73x. But when they went to the 1/4 after dynoing dave lost his fully built to the hilt ATS Allison.



(If memory serves me correctly)



I think this thread needs to get back on track!

 

[COWBOYDUALLY]

Chris has it going on there in Willis, wish i had a third gen at times so he could go buck wild on it . Artic Air IMO are the way to go,tested and proven. From what im hearing he has some new tricks up his sleeve, hes just waiting on matierial from the machine shop, should get really interesting :-laf ... Jeremy

 

[mattymac]

I just think drive pressure in the AA twins has to REALLY climbing past 50 lbs. If they would incorperate an external WG I think there would be alot more. But then the price would be close to Marks kits and we all know he runs WG's. I do like the fact that the AA kits give more people a chance to be able to run twins because of the cost. I would like to see what Relentless has up their sleeve for the future. I have heard that they are going to make a kit with a bigger secondary though.

 

[JDerbedrossian]

im very interested in the AA twins, can somebody that has these just put a gauge to monitor the drive pressures and put this to an end so I can buy a set.



Jake

 

[RCC]

You can call Chris @ Relentless Diesel and he can give you the lowdown on all the pressures,he checked eveything and ran them on a few select trucks before releasing them to the public. He can also be reached at www.relentlessdiesel.com.

 

[Idaho CTD]

I built a kit for my truck with the stock turbo over a B2 that uses the stock wastegate modified slightly. I see 67psi of boost and 77psi of drive pressure. I'm putting a external on it right now to see what the difference is.

 

[BRayls]

:--) wow that drive pressure is crazy

 

[Idaho CTD]

:--) wow that drive pressure is crazy

Believe it or not that isn't bad for the size of the stock turbine wheel and wastegate. The wastegate hole is only 7/8" and I think the exducer on the turbine wheel was only 2. 2". 7/8" equals . 6 square inches. A tial 38mm external wastegate using a 1 1/2" pipe with a inside dimension of 1 3/8" equals about 1. 5 square inches. So the flow potential of the stock internal is only about 1/3 of a external 38mm.

 

[BRayls]

it not bad . I would not be happy with that much. is your rig o-ringed?