Hey guys, im thinkin about gettin the stage 3 HTT compressor upgrade kit for my HX35. Has anyone tried it, and if so, what did it do for your EGT's, boost, and spoolup? I will be running a #0 plate, 4k, New Era 370's, and 191 DV's for fueling. Will it keep it cool enough to drag race, and pull on? Im hoping it will bring my EGT's down a couple hundred degrees, or at least make them a lot slower to rise. I am running a 16cm exhaust housing, but may switch to the 18.5cm exhaust housing I have when i put the injectors is. Also, I take it you dont have to balance anything with this kit? Just stick the wheel and housing on, and go? Thanks

Eric

 

Its a nice upgrade for a mild truck, spools quick and drives like stock, but with your fueling it wont be enough. I would recomend stepping up to something in the s300 range. And yes its as simple as bolting on the wheel and housing.

 

Any ideas on what kind of EGT drop it would give me? I can handle a little heat when im running it hard, just as long as its pretty controllable. Thanks for the info though!

Eric

 

I saw this thread over on comp diesel also and seeing that you dont want to go to an s300 and are considering an hx40 I would recomend going with HTT upgrade. I have never been a fan of hx40's and I would never buy one, as you probably know the HTT upgrade is an HX40 wheel and housing and will cool just about the same as a 40 but will spool nearly as quick as stock due to the hx35 hot side. It is also much cheaper than buying a 40 and you have a lot of options on exhaust housings, wastegated and non.

 

As far as the egt drop I cant say for sure. How hot are you running now?

 

Well, im not sure what i want to do for an aftermarket charger. I really would like to have a BD Super B, but It will be a while before i can afford that. I just havent been impressed with the towing ability of a SPS 62 on a 12 valve, but im sure a 40 would be the same. So thats kinda why i was thinking about the HTT compressor wheel till I can save up for a Super B or something like that. Probably next year or something. My EGT's right now peg the gauge on 1500* on about a 0-60mph run. I think its running mid 14's now. Id like to run 13's with the 370's, and the 60mm HTT kit. My EGT's are really controllable right now. I can run it fairly hard and keep it cool, but on a WOT pass it will get fairly warm. What were your EGT's like on the stock turbo runnin 13's?

Eric

 

The sps62 that your talking about on your buddys truck, is it a 14cm housing? If so then I can understand where you are coming from. I have a sps62 with a 14 housing on my truck now and with an auto it runs pretty warm with a big load, and I have to keep the rpm's up to keep it cool while towing up a grade. It sounds like my truck would peg the pyro about as quick as yours does when I had the 35 on it. The 35/40 should run a decent amount cooler than your 35, it might be just what youre looking for, for now at least.

 

Yeah, this wont be permanent I dont think, but I figured If I could cool it down a little for the time being that It wouldnt hurt anything. The 62 was on my cousins 12 valve, but it had the 12cm housing, and it was still toasty. Our head doesent flow quite as good as the 24 valve head though. I think his empty cruising EGT's were right around 1k degrees. Doesent leave a lot of EGT room for towing anything. Mine will cruise about 600 or 700* right now. I know I could control it towing with a 62mm charger, but i think id have to babysit the pyro pretty good. I dont haul a lot, but im afraid I wouldnt be real happy with a 62 for towing. I think if i put the 18.5cm housing I have on the exhaust side to keep the drive pressure, and boost down a little, and the 60mm compressor and housing to flow the air, then it should'nt be too bad with the injectors. Thanks a lot for the help

Eric

 

With the upgrade you are talking about, I believe you have to machine the face of your Hx-35 cartridge to accept the 60mm wheel since your stock one is either a 54 or 56 IIRC. The wheel is recessed on the cartridge face a little for a tight fit.

 

Well I was reading on HTT's site, and supposedly, for the 95-02 HX35's(mine is off a 96), no machining is required. It lists it for one of their other upgrades but not that one, so I dont think i have to worry about that with this one.

Eric

 

It depends on the upgrade. There is a 60mm 8-blade wheel with an 83mm exducer that doesn't require any machining (same exducer size as stock) and there's a 60mm 6-blade "high flow" wheel with an 86mm exducer that will require machining.

 

The 8 blade is the one i was looking at.

Eric

 

I emailed HTT directly and was told they all required machining for the HX35?

 

Hmm, thanks for the heads up. I might have to call and see what they have to say. And i looked again, and I thought the stage 3 kit was a 8 blade wheel, but now that i look again it says its a 6 blade wheel.

Eric

 

I think that's for the newer HX35's with 7 blade 54mm inducers. They switched sometime after going to the 24valves. AFAIK all the 2nd gen 12v's had 56mm/83mm wheels.