New HTB2

[Jetpilot]

Clipped does two things.....



1) It basically allows for more top end flow on the exhaust side.



2) lightens the rotating assembly.



The idea is that you find the right compliment that gives the required results. This being said normally one clips the vanes to improve top end performance at the sacrifice of low end performance. Usually a turbo shop will tell you that the lightening of the assembly makes up for the clipped vanes down low. This has not been my experience in real life.



Bottom line is don't clip the vanes if you are looking for bottom end performance!



Doug

 

[KSmid]

HTB2 turbo barking under light load. Reasons for this?

Running the Killer B with 64 wheel. Boost climbs great right to 40 psi when floor boarded. If driving, say 55mph and go to pass a car and lightly get in it boost gauge starts jumpimg around 18- 20 psi and sounds like it barking horribly through the afe. It doesnt sound good to me. Jumps to 30+ psi and every where between. What causes this irraticle jumping around in psi? First time post on here haven't filled out info yet.



2000 with 275 rvs (Have edm 150 hp just arrived to today soon will be installed), edge comp drag box, afe air cannon, 4'' straight out.



Any idea of hp when I get 150 edms in with drag comp. Is auto with 91% Full billet DTT trans.

 

[lmills]

Ksmid. Call Paul immediately about it. I am having the same issue. We are trying to work on it.

 

[mattymac]

so whats the max boost PSI or this chargers efficiency range?



For both the killer B



And the HTB2

 

[lmills]

I believe Paul said to to go no more than 45-50 psi

 

[TORQUE THIS]

This turbo barks very easily, I had to "learn how to drive" again. It takes some getting used too

 

[lmills]

NO offense TQT, but this aint bark. It is a bad surge that occurs right around 16-20 psi.

 

[TORQUE THIS]

NO offense TQT, but this aint bark. It is a bad surge that occurs right around 16-20 psi.

None taken, I know that after my fuel issues were taken care of, the bark was much easier to control.



Do you have the clipped wheel??

Would having an ATS manifold cure or help??

Boost leak somewhere??



Just trying to throw out some ideas...

 

[Jetpilot]

Sounds like what we deem in the aviation world as a compressor stall. The air flowing over the vanes of the compressor is not flowing smoothly. In a jet we just change the thrust up or down and this normally cures the issue. But, on our trucks the issue is not so easy. It sounds like for whatever reasons, under certain conditions you are seeing this... ... Without some changes to the turbo itself I would expect you will have to learn to drive the truck avoiding the conditions that onset the surging. I have driven a couple trucks that do what you describe and it sucks!



Good luck,



Doug

 

[lmills]

I have been kicking around getting an AST manifold, but really don't think it will help in this situation. It really sounds just like the stall that Doug is describing. I thought about trying my TAG out in this to see if it helps. I can drive around it. The turbo is an awesome piece. I wouldn't want to discourage anyone from buying one, but this needs to be taken care of.

 

[TORQUE THIS]

Could the airflow be different between the 2nd and 3 gen exhaust manifolds??



BTW...



Hey Doug, I think I copied your number down wrong, shoot me a PM again and a time to call you!

 

[lmills]

I don't think the airflow problem is in the exhaust, I think it is in the intake side. It's almost like the turbo is flowing too much at too low of an RPM or something. Or maybe it's the opposite. Maybe the compressor is too large and not spinning efficiently at the low end. If I keep the RPM's up the problem is not there. It was most noticable last weekend when I went on a trip through the mountains. When I would slow down for turns then roll the boost back up, the problem would occur. If I downshifted and brought the RPM's up the problem wasn't there.



Either way I have spoke with Paul and he is on it. I feel very comfortable that they will get it taken care of. Other than that I love the turbo.

 

[Chrisw]

surging

As you guys know I have a 2nd gen truck. My turbo did what you are talking about but mine was between 28-32 psi and was worse with the edge box on (timing bumped up). It was very noticable when towing a trailer and having the rpm below 1900. Any faster and I don't remember it doing it. On my truck I had a hard time holding it at that boost so it didn't seem to be a proublem to me.



Anyway my turbo will be shipped tomarrow to Paul for a bigger compresser side Can't wait



I tried last night to make a few runs on a steep hill for boost and temp numbers, So I will be able to compaire them to the new turbo.



I will keep you posted

 

[SRadke]

Had mine on for almost two days now and logged over 500 miles. Spoolup is great, comprable to stock, egt's never over 1350° with my PMCR on 6:6 and max boost of about 41psi. Prelim results look promising



-Scott

 

[Luke Warmwater]

Not trying to pick a fight but since HT raised their price last week, I don't think I will play guinea pig given I can get a proven B1 for the same money. I was ready to try one since B1s are on backorder until who knows when. Not at the new price

 

[Patriot_RAM]

Same here. I saw just looking at their website and debating placing an order. Not at the new price!!!

 

[SRadke]

I ordered the day before the price increase



-Scott

 

[lmills]

Well as some of you might have read earlier I had a surge problem with the turbo and wanted to give everyone an update. After working with Paul on the issue he sent me a modified compressor housing and a 14 cm exhuast housing to try out. I like the 14 cm housing for temps, but the end results was that the bark surge was still there after the modified compressor housing. So we put our heads together and tried a few more things. The end result was the surge is gone thanks to eliminating the factory intake piping. We were thinking that the air being too turbulant going into the turbo might cause it. He felt strong that it could be the case. So over the weekend I bought some PVC (don't laugh it was just an experiment ) and fabbed up something similar to an AFE torque tube. I test drove it Monday and it is totally different truck. I am very pleased. Hats off to Paul for putting up with my continuous calls trying to work this out. He is a very patient man.

 

[KSmid]

would the tag work in this situation? I'm going to the 66 and 14 ex. as soon as they can get one. But would like to know what is actual the problem with them. It was cold yesterday morning, 30 or so . It wasn't near as bad then when it is hot out!

 

[lmills]

I am not sure if the tag will work or not on the sledpuller turbo. I know on the Killer B the tag unit will not fit in the opening of the compressor. The opening is about an 1/8" in smaller than the factory turbo