Charger's

[duramaxin14]

Maybe this topic has been on here before. When i go with a turbo i want a good turbo. I have narrowed it down to 3 options. Industrail injections SPS 66 gt4202 or a aurora 5000 feed back on all turbos will be appericated. Yes i have also thought of the htt and s300 and other chargers. But if im going spin the money i minus will go big or go home.:rofl: Also I no boost can be controled by fuel. A external waste gate is Avaible for the a5k. Do i need a waste gate. Will a waste gate help me or hurt me.

 

[Mike]

Maybe this topic has been on here before. When i go with a turbo i want a good turbo. I have narrowed it down to 3 options. Industrail injections SPS 66 gt4202 or a aurora 5000 feed back on all turbos will be appericated. Yes i have also thought of the htt and s300 and other chargers. But if im going spin the money i minus will go big or go home.:rofl: Also I no boost can be controled by fuel. A external waste gate is Avaible for the a5k. Do i need a waste gate. Will a waste gate help me or hurt me.

Wow, just get one and try it. If you don't like it, get a different one. Ok well maybe not. I'll be testing a Cheetum charger soon, have tested all the aurora's up to this point and have had some testing with the 4202 and some others not listed. The sps 66 one of the ones listed I don't have experience with, but I can say they all work. What are you wanting to build Kurt? If your not going to go crazy with fuel, you may want to scale down a bit to make your normal driving experience pleasant.

 

[duratothemax]

so you're not going to build your tranny.........?

go with the GT42, thats a good option for a daily driven street tow truck!

 

[LarryJewell]

Kurt, here's some reading on turbos

http://www.mcratracing.com/forum/showthread.php?t=1033


I just bought the Cheetah 70mm, and the only reason I chose that one is to be different. I was originally considering the A3K or 4088, but I changed my mind at the last minute. Anyway, i'll let you know how it works out for me.

 

[codyn]

everthing i have seen wiht ak5 and 42 . i have heard the 42 has 100 hp on ak5

 

[SmokeShow]

Wow, just get one and try it. If you don't like it, get a different one. Ok well maybe not. I'll be testing a Cheetum charger soon, have tested all the aurora's up to this point and have had some testing with the 4202 and some others not listed. The sps 66 one of the ones listed I don't have experience with, but I can say they all work. What are you wanting to build Kurt? If your not going to go crazy with fuel, you may want to scale down a bit to make your normal driving experience pleasant.

You are getting a Cheetah on your LB7? :cool2: If so, PLEASE keep me informed. We may tag team it. :hug:

You say you have experience with all Auroras... What do you have to say about the A4K? Is it an s300 varient or something else? Can it be used reliably in a competition setting or is it more for street use?


C-ya

 

[speedy03]

Kurt, here's some reading on turbos

http://www.mcratracing.com/forum/showthread.php?t=1033


I just bought the Cheetah 70mm, and the only reason I chose that one is to be different. I was originally considering the A3K or 4088, but I changed my mind at the last minute. Anyway, i'll let you know how it works out for me.

Let me know how it works out, i'm interested in the 64mm one. Are you sending in the one off your truck or, starting with a new one? What is the price?

 

[Mike]

You are getting a Cheetah on your LB7? :cool2: If so, PLEASE keep me informed. We may tag team it. :hug:

You say you have experience with all Auroras... What do you have to say about the A4K? Is it an s300 varient or something else? Can it be used reliably in a competition setting or is it more for street use?


C-ya

Mitch

I will be testing one on LarryJewells truck. Ok well he will do the testing but I get to play with the controls ( The tune ) and ride in it ( and drive it if I can talk him into it again).


As far as the A4K, I trashed it. I built several pedestal mounts and doing so I left a dingleberry in the mount that I didn't catch. When I drove the truck, I was several hundred miles from home, I heard a chain rattle sound that turned out being the turbine wheel being slowly reshaped. I make it sound like it was a big ball, but it was only a tiny piece that did the damage. I really didn't give the A4K a large test, but will say I really liked the way it performed. I like the 5k better but, the 4k has basically the same turbine wheel and is pretty close in size. The compressor is smaller in size. The surge was way less than that of the 5k, and seemed to come on a bit sooner as well. Because of the surge, I feel the 4k is a better option for longevity. As far as the s300, I'm not sure how they compare. The a5k seems to be similar to s400 or at least the smaller s400 but not completely sure.

 

[SmokeShow]

thanks Mike your testimony is valued.

 

[duramaxin14]

Larry shine light when u can. I have considered the gt serise but for some reason im leaning more towards a a5k or sps66

 

[dieselson]

I looked at the stats on the ATS website, and the A4k is slightly smaller than the GT4088. I gotta tell you Kurt, we love our GT4088R

 

[05_LLY]

IMO the a5k is more compareable to the 4094, maybe not in size and air flow but in power output anyway. It also seems to me that a common factor in ALOTof (not all) engine failures is that they were running a5k's!

 

[LarryJewell]

IMO the a5k is more compareable to the 4094, maybe not in size and air flow but in power output anyway. It also seems to me that a common factor in ALOTof (not all) engine failures is that they were running a5k's!

And a few transmission failures too

 

[Mike]

And a few transmission failures too

You know how to hit a guy when he's down don't you... :rofl:

05_lly, how can the charger be the reason for the engine failure?

 

[02freighttrain]

The A5K is, what it is. A T-3 ped with a lot of drive pressure. Does it break motors? Talk to Kyle or Tomac. They have had good success with one.

Mine works just fine. Other Turbos will definately make more power. At some point, more power isn't kind to parts. It just depends what your goal's are.

 

[Mike]

I looked at the stats on the ATS website, and the A4k is slightly smaller than the GT4088. I gotta tell you Kurt, we love our GT4088R

Some of the measurements are smaller some are bigger? Sure would like to test a GT4088 along side my A4k once it's fixed. Hmmm.... May just do that. Thanks Drew.

Gt4088r compressor inducer 63.5mm / exducer 88.0mm exhaust 77mm? probably inducer .85 to 1.19 a/r exhaust ( Could be an advantage over A4k depending on where the a/r is measured from ).



A4k
Compressor Wheel Inches Millimeters
Inducer 2.48 63.00
Exducer 3.63 92.28
Exhaust Wheel Inches Millimeter
Inducer 3.00 76.43
Exducer 2.76 70.14


A/r's from .85 to 1.20


Would think the A4k would have a better compressing ability with the same exhaust flow.

 

[Mike]

The A5K is, what it is. A T-3 ped with a lot of drive pressure. Does it break motors? Talk to Kyle or Tomac. They have had good success with one.

Mine works just fine. Other Turbos will definately make more power. At some point, more power isn't kind to parts. It just depends what your goal's are.

How long have you had your a5k on and running Steve? What kinda drive pressure do you have with your 1.0? housing?

 

[05_LLY]

05_lly, how can the charger be the reason for the engine failure?

Im not knocking the charger it has more than proven its self, but looking around IMO more engines have failed running a a5k than any other charger!

High drive pressures leads to high cyl pressure and increased cyl temps which is what more than likely causes rod and piston failures!

 

[Mike]

Im not knocking the charger it has more than proven its self, but looking around IMO more engines have failed running a a5k than any other charger!

High drive pressures leads to high cyl pressure and increased cyl temps which is what more than likely causes rod and piston failures!

I gotcha. Thanks

I wonder though? How does high drive pressure lead to high cylinder pressure? With the piston at tdc, with the exhaust valve open, how much of the total volume will stay behind in the cylinder with a 20 or 30psi change in back pressure? What I mean is with such a small space compressed to say 100 psi, how much difference will be made by decreasing the psi to 70 psi? I remember putting an egt probe in a 7.3na diesel and being floored at the temps. Adding a charger to the same engine with the same fuel increased drive pressure from near zero to 30psi. Thing is the truck ran cooler, egt's were lower, and quite a bit more power was made. Just curious is all... Thanks

 

[02freighttrain]

How long have you had your a5k on and running Steve? What kinda drive pressure do you have with your 1.0? housing?

I would have expected a failure at this point. I have beat the parts fairly hard. I can only attribute the longevity to, reduced CR. My up pipes are glowing RED, no, BRIGHT red on every pull video. I don't know the drive pressure. I would guess over 130?

One thing I have noticed is that my oil pressure is high. 70-80 at idle(cold).

I see 35-40 on the guage immediately after a pull at idle. Maybe I'm squirting enough oil on the pistons to keep them living. I would assume the oil pressure is high because we built the motor fairly tight on the mains and rods. Other than that the sender could be bad and it will puke tomorrow.
OT, sorry. Since I'm OT, why don't we drive a dry sump pump off the belt and plumb it into the lower galley that supplies oil to the squirters. I hope Todd doesn't read this or he will have it designed by tomorrow.