Artic Twins / Kendricks

[BLACKJACK]

Was wondering what your impressions of the Artic Air Twins vs. the Kendrick setup is. I am tryin to find the best all around setup for twins or a big single for the truck that sees all types of abuse. Fuel mileasge is of no concern just lots of cheap useable power. I am in no hurry to get this done as I have alot of other mods and so forth going on, but I just wanted to do a little research. Thanks in advance.

 

[Scrappy]

What I get is the arctic air system doesn't have an external wastegate, so it is limited on EGT reduction @ high HP levels. To get quick spool you have to use a small exhaust housing on the small turbo that is restrictive @ high RPMs. the Kendrick twins use an external gate so they can spool quickly and still keep cool @ high HP, you can use the small housing to get the spoolup and the wastegate bypasses it @ higher RPMs to keep it cooler. This is just my oppinion(and I could be wrong).

 

[Stefan Kondolay]

Relentless Diesel's Artic Air set-ups seem to be the fastest at the track. They have 2 that are in the 11's I believe, and they spool super fast.

 

[RCC]

I am curious about some of the above remarks,being the owner of one of the trucks that stefan mentioned, neither one of the trucks that see alot of track times has egt or high horsepower problems. Neither one of us rarely go above 1250 degrees and both of us have dynoed in the 700 hp range in veiw of many people.

 

[speedyjdl]

Whats the bottom turbo that is used in the Artic Twin setup? After months of testing nobody has blown the top turbo yet? What is the maximum boost pressure in this system?

 

[mattymac]

Whats the bottom turbo that is used in the Artic Twin setup? After months of testing nobody has blown the top turbo yet? What is the maximum boost pressure in this system?

HT3B bottom, 50ish for boost pressures. I would like to see what that kit would do with and external WG. They seem to be working very well.

 

[AK RAM]

Relentless Diesel's Artic Air set-ups seem to be the fastest at the track.

Yeah... nitrous sometimes has that effect. :-laf

 

[speedyjdl]

Is that a 26cm exhaust housing on the HT3B?

 

[michaelRitz]

I am sold, I've been sold, I will have a the Arctic Air setup this summer right after my SB DD, FASS, and head studs are installed. Which FASS are you running RCCox 95 or 150?

 

[RCC]

I run the 150gph fass, most days i wish i had the 95. The 150 has a tendency to make some really hellacious slurping and gurgling sounds sometimes. I am told if you install a bigger pickup in the tank the noise will go away. I will have to get around to trying it one of these days.

 

[michaelRitz]

Would the 95 provide enough fuel? Just trying to make a final decision on what pump I want. Trying to make 600 plus rwhp eventually. Thanks for all the info and help.

 

[BLACKJACK]

Will a twins setup require studs? I think I saw that they cost around $500 clams. I wasnt figuring on that. Is ARP the only manufacture or is there a better solution?

 

[michaelRitz]

I am going to install ARP studs before I put my twins on. I am not sure if it is necessary with the Arctic Airs check with Relentless but I am studding the head anyways for an added safety

 

[cmonroe]

Blackjack, yes twins do require studs! Stud your truck before installing twins. As far as the Kendrick compounds. I've had two sets of them, one on a 12v and one set on my common rail. Mark will build you a set of twins to match whatever you are planning on doing. Just give him a call and he will build them to suite your needs.

 

[Mark_Kendrick]

Before I say anything. . I know nothing about Arctic twins. I don't know who makes them or what they are. Do they have a website?



Most of this has already been said here...



As far as wastegates go... any set of twins that uses the internal gates on the turbos is at a disadvantage to a set with an external gate. The external gates flow more and are much more adjustable. They allow for smaller housings on the secondary turbo (faster spooling) and usually prevent the need for blow off valves. Egt reductions are significantly higher with larger wastegates.



The drive pressures on most sets of twins that use internal gates have a crossover point at 50-55 psi. The crossover point is the pressure after which drive presure significantly exceeds boost pressure. If the crossover is much higher than 50-55 psi the secondary usually has a large exhaust housing making them 'lazy'. There also could be a small housing on the primary compared to the secondary either way they will be slow to spool when compared to a similar set with matched wastegate and exhaust housings.



An HY9/HT3b-26 set of twins with a 42mm wastegate has a crossover point of about 65psi.



HX35-HT3b twins are capable of about 650hp(diesel only) on a 24V VP44 truck. A B2 can stretch that to near 700.



3rd gens using a B2 and the stock turbo (HY9) max out about 550-575 (diesel only) this is due to the top turbo. To get better power you need a bigger secondary (little turbo). There is a version of the B1 that swaps in very nicely .



Drugs throw a whole new wrench into the works... Nitrous is turbo in a bottle that makes up for a lot of other deficiencies.





FWIW,

Mark

 

[michaelRitz]

I have read and know many of times guys making over 600rwhp on 3rd gens that are using diesel only. Some over 700rwhp

 

[driverno8]

Couple of more weeks and I'll be there... . over 600rwhp. Can't wait.

 

[Mark_Kendrick]

I have read and know many of times guys making over 600rwhp on 3rd gens that are using diesel only. Some over 700rwhp

I never said any thing about what was achievable with a 3rd gen. I was talking about where the stock turbo seems to be a hinderance.



Big singles and or twins on a 3rd gen will make lots of power. The HPCR fuel injection system is capable of immense power.

 

[michaelRitz]

Sorry I missed out an important part of my previous reply. Guys are making 600+ and some 700+ with the Arctic Air setup. Yeah I know big power is definitiely feasible with the 3rd gens. Sorry for the previous misunderstanding, but now I have it all out.

 

[michaelRitz]

Also, maybe to I am ready to buy i will just shell out the extra money and get the Piers Street twins, I have talked to many of people who love that setup. There are some many options out there. I feel you can have a great setup with a lot of the twins that are out there. Just have to know your goal