kevellis32

Is anyone running a HX35 w/ an the HX40 conversion (shaft) along with an HT3B as a twins set up?
I am considering this instead of buying a Super Phat Shaft 62 because it will cost me roughly the same to build with some help from my mechanic. I saw the same setup that I mentioned on a common rail, but I am just curious if any other 12v or 24v trucks are running this setup and what you think of it.
As of tomorrow I will have my timing at 16.5 and have a 4K GSK installed with DV's in the very near future.
EGT's are my main issue, but I want good bottom end spool which I don't think I will get with the single, but I am open to all options if someone has some good advice and experience.
Thanks for your input

rollincoalCTD

i have heard those marine injectors cause higher EGTS.... due to the spray pattern

kevellis32

Oh yes they do. I can easily get to 1250 without even trying. The spray pattern is horrid from what I have heard, but they sure do dump some fuel.

dzlfarmboy

Alot of people talk about the bad spray pattern, but they will make good power, you just might have a lil more heat with it. A 35/3B twin set will be perfect for towing and a fun street truck.

Mike Holmen

Which exhaust area housing you using? If you run lots of advance on the pump run a larger turbine housing i.e 14cm vs 16cm. P trucks need more turbine area than the newer trucks, this hurts spool-up some. How large is the wastegate flapper? You will need to work this area some, opening it will load the 3B more good and bad. Tons more air at WOT vs mid range performance. What pressure setting you running on the wastegate actuvator? Nice set-up once you get everything dialed in. Very good mid-range and decent top end. Your intial spool-up time will slow down some with the extra turbo but then things will get more exciting. There are a few trucks that have ran them and put down 700rwhp so they work. Happy building buddy

ratsun

I run a Piers modified 35 (58mm wheel and a 14 housing) over a 3b with a 26 housing and its pretty fast in the spool-up department. It's a bit of a sacrifice for cooling in the top end with all the fuel I have but for me its a fair trade off as it makes for a nice DD to and from work. Don't bother changing your DVs as you will never cool anything bigger than your 181s

Mike Holmen

Ratsun, you ever get that head/block to seal up I blew mine out pulling 60psi, with no re-torques. My schedule didn't premit any time to tweak her prior to going camping. My wife wasn't impressed by my random road side campsite find.
You should try putting on a larger secondary and see what happens. How much did Piers work the wastegate area on the 35? That's the secert to lowering egt's by increasing flow thru the wastegate at higher work loads. Have you tried to any adjustments the wastegate actuvator?

ratsun

Hey Mike, looks like we got it for now but I have set my blow-offs at 65 and have pulled a bunch of fuel out so a hard pull only reaches 1300 ( a little gun shy still)
Sorry to hear about your going out on you, Murphy somehow knows the least opportune time to work his magic doesnt he.
I have only played a little with the actuator, so far it seems to work best if it starts to open at 20psi and is full open at about 27psi but?
You used to run a 40 didn't you? Hows that Garrett working compared to the Holset?

Mike Holmen

Imagen a faster spool-up than the stock single HX-35 and will push more air than my old HX-40/3B combo. My wastegate isn't set-up properely yet, so I'm still tweaking. The garrett wastegate flapper is smaller than my PDR40 and you can feel it openning and lite up the 3B. Unlike my PDR HX-40/3B combo, which was worked smoother. When everything working right, I can pull 50psi in a few seconds. Boost leaks and cracked valve seats/head gasket fixing have been a few of my issues as of late. Also the price of fuel as kinda slowed me down. I'm building a new twin set-up this fall, nothing big power but a sweet street set-up. I might have too much time on my hands and too many new turbos sitting unused in garage.

ratsun

Maybe I will have to run some of your excess stock LOL
Did the Garrett need any changes to the hot/cold pipes? Same mounting as the 40?

CMooreBLKSMK

If you use an external wastegate will that help with the EGTs also?

kevellis32

I would go with a 14 exhaust housing. I am just mainly concerened with EGTs. that and I wanna be able to blow the doors off of a mustang GT. As I am now the truck is fast, but I am just blowing way to much smoke and I wanna clear that up with more HP

Mike Holmen

The only thing required was a new down tube. If you have a welder, its easy. Everything else fits in, no probs. I had a local machine shop build flanges for the 3b and the garrett, I used a 3in exhaust elbow. My new hot down tube bolts in just like the PDR unit did. I just like trying new stuff, nothing prefect yet. I want to build a twin set-up that will spool like a gaser but push enough air for 500rwhp. It will have an external wastegate, which I can control from a remote switch inside the cab. Its all in the turbine housing and wastegate sizing. So far the garrett has held up to my abuse. I have towed with the truck and put a few (20k) miles on my twins. So far everything is rosey. Its not the trick stuff like what Piers is building now, but it works. To smoke mustangs, boost launch hard in 4X4. Most worked stangs are in the 12 second range, for a 7000lbs truck it can be done but you have to have a good reaction/launch to beat them. I've ran a 90's stang at a street light war. It had street slicks and a stick. It was close. Nos would have changed things.

ratsun

I sounds like on a third gen its lightning quick, I can't justifiy the $$$$$ though when my old set still works perfect