anyone using a Holset HX-35 from a 94-02 Dodge Ram Diesel?
- Thread starter flubyux2
- Start date
quik, what do you mean? that formula doesnt apply to T3 flanges or what... i dont make the connection.
Jon, do you have internal wg actuators with different spring pressures? the stock actuator on my truck is 18-19psi. whats-his-face said a 50mm external is a must for the HX35-12cm... but what if i were able to use the CT-T3 mr2 adaptor, bolt on the HX35 and a tial 38 and be able to match the spring in the tial to the internal gate spring so i have two gates venting at the same boost level?
Jon, do you have internal wg actuators with different spring pressures? the stock actuator on my truck is 18-19psi. whats-his-face said a 50mm external is a must for the HX35-12cm... but what if i were able to use the CT-T3 mr2 adaptor, bolt on the HX35 and a tial 38 and be able to match the spring in the tial to the internal gate spring so i have two gates venting at the same boost level?
yeah really!!! my hx50, at least thats wat i was told it was- but it does have a 74mm inducer?!, has a twin scroll 18cm housing with a 5in vband t6 footprint. i figure 18cm is way too big and theres now way to run 5in downpipe without tearin shit up. but 3800rpm with a 16cm housing?? wat size vband?? is it t4?? dude ur givin me new hope. let me know more info please.foreverpsycotic said:
btw, that formula should work for t3 or t4 flnged turbos to get a basic idea, but different turbos have different spool characteristics.
QWIKSTRIKE
475rwhp459torq an climbin
flubyux2 said:
Meaning if it is a t3 housing made for that turbo specificly you will want the 1.0 or maybe larger ar. Those smaller t3 housing will spool fast but lose the turbos efficiency at higher RPMS when compared to the t4 units. I have a friend that had a t3 set up and it made more power when a t4 housing was use.
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flubyux2 said:
Why do you need two wastegates. Find a 40mm wastegate like me that has plenty of different spring rates available. I have a 6lbs spring and I have not had a issue with it now. I am still waiting on my wideband and some added funds but I think I can hold boost steady at 14lbs. If you are looking for lower than that, I dont know you could find a lighter spring rate.
The internal gate on the holsets is no where near large enough to controll the exhaust energy comming out of the gas engines.
I grafted a ct26 wastegate actuator and welded mounting studs on my old hy35.
I grafted a ct26 wastegate actuator and welded mounting studs on my old hy35.
mk3713 said:
in addition to what jon said, my MR2 CT-to-T3 adaptor is only flanged for a 38mm WG. thats why i specifically mentioned that one.
btw, IIRC, the WG port on a stock CT is 36mm diameter. any idea what it is on the HX35, or at least what the HY35 was?
i think tandem Wastegates would be just as effective as a single WG. it could even be more effective. i know some of the big guys running GT47's or whatever they are called in that range have to run dual 50mm or 60mm WG because the pressure differential between the a closed WG and open WG wasnt enough to prevent the turbine from overshooting the desired boost level.
foreverpsycotic said:
Just piggybacks. HKS VPC+S-AFCII. I'm going standalone this spring.
Here's a dyno comparing my HX55 to stock twins in TTC-mode (not sequential). European dynos usually calculate the drive train loss and convert it to crank numbers, so the numbers are estimated crank hp. Both dynos are at 1.2 bar. Twins are the continuos line and single is with the dots:
supra_ed said:
If you have a 74mm inducer on your turbo, I doubt you will get full spool before 4500rpm. Even if these are very efficient turbos, they are not magic turbos. What size exhaust wheel do you have?
I have a true 4" vband on the exhaust side. I had to modify my BL 4" downpipe as they come with a 2.5" discharge. I used a V-band clamp from a HX60 that my friend cut and made a little smaller and my friend made the V-band flange with a lathe according to my drawings. You can get HX50 vband clamps, but I couldnt find any, and I got this HX60 clamp for free.
The HX50/55 come usually with a housing that is very close to a T4 footprint. I had to grind the exhaust housing bolt holes a little to make it fit my T4 manifold, it took me 5 minutes with an air pressure tool. The mouth in the housing is a perfect fit to a divided T4 manifold. If you have a T6 footprint, this also makes me thing you dont necessarily have a HX50, it could be something bigger. But I dont know all the specs these Holsets came in, they could have been sold with different housings.
Can you post some pics of your turbo?
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foreverpsycotic said:
I'm guessing around 4000rpm? Depends alot of the exhaust wheel, twin scroll mani+housing and if you have cams etc..
In a 2 litre engine with a 12cm^2 housing, most get positive boost at 3000rpm and 1bar at 4000-4500rpm.
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flubyux2 said:
The internal gates on the diesel turbos are usually only 20-25mm. You need to port these bigger if you use them in gasoline engines. Most replace the flapper from a stock turbo like a CT-26 and port the wastegate hole accordingly. You can also just change the exhaust housing that doesnt have an internal gate and run an external gate.
I also found this:
6 cm2 = 0.41 A/R
7 cm2 = 0.49 A/R
8 cm2 = 0.57 A/R
9 cm2 = 0.65 A/R
10 cm2 = 0.73 A/R
11 cm2 = 0.81 A/R
12 cm2 = 0.89 A/R
14 cm2 = 0.97 A/R
15 cm2 = 1.05 A/R
16 cm2 = 1.13 A/R
17 cm2 = 1.29 A/R
19 cm2 = 1.37 A/R
There's quite a bit of information here:
http://www.dodgeram.org/tech/dsl/FAQ/turbo_faq.htm
http://208.186.78.102/forums/showthread.php?t=145691
http://honda-tech.com/zerothread?id=1225182
http://www.turbomustangs.com//forums/showthread.php?threadid=32406&perpage=20&pagenumber=1
6 cm2 = 0.41 A/R
7 cm2 = 0.49 A/R
8 cm2 = 0.57 A/R
9 cm2 = 0.65 A/R
10 cm2 = 0.73 A/R
11 cm2 = 0.81 A/R
12 cm2 = 0.89 A/R
14 cm2 = 0.97 A/R
15 cm2 = 1.05 A/R
16 cm2 = 1.13 A/R
17 cm2 = 1.29 A/R
19 cm2 = 1.37 A/R
There's quite a bit of information here:
http://www.dodgeram.org/tech/dsl/FAQ/turbo_faq.htm
http://208.186.78.102/forums/showthread.php?t=145691
http://honda-tech.com/zerothread?id=1225182
http://www.turbomustangs.com//forums/showthread.php?threadid=32406&perpage=20&pagenumber=1
flubyux2 said:
A little porting action on the flange and adaptor is all thats needed. You can't directly bolt the wastegate to the mr2 adaptor, so I have a 40mm tube welded to the flange that goes to the ported adaptor then a 40mm wg flange on the wg side. On the hy35 turbo that is all you need. There is no need for a dual wg setup in my opinion.
I have an HY35W on my Supra.. err had.. Something else is in the works I had ridiculous boost creep until i went with an external w/g. I was using the 14cm2 ex housing. I had full boost between 3200 adn 3400rpm. at 26psi and 110oct fuel, i had no traction in 1,2 or 3 and clutch slipped in 4th. supposedly built for 510 ftlbs. i doubt it was making THAT much, but it was pulling HARD... as i said in another Holset thread, with external w/g itll hold boost perfectly.. and it will make for one bad-ass street car!!
I had ridiculous boost creep until i went with an external w/g. I was using the 14cm2 ex housing. I had full boost between 3200 adn 3400rpm. at 26psi and 110oct fuel, i had no traction in 1,2 or 3 and clutch slipped in 4th. supposedly built for 510 ftlbs. i doubt it was making THAT much, but it was pulling HARD... as i said in another Holset thread, with external w/g itll hold boost perfectly.. and it will make for one bad-ass street car!!
youll also need to put an oil restrictor in the center section, otherwise youll over-oil the turbo and youll pour TONS of smoke out the turbine housing. Ask Jon M. he had to make a little pill for me.
^Yup. Josh... glad to get that turbo back from you. I have a car here that its going on for more R&D.
I only have this problem on starup. Once it is up to temperature the smoke goes away. After coming off a rebuild on the engine, my initial thought was the rings had not seated or I had not put a valve seal in correctly. Then I searched some threads that Jon posted about his problem and I new it was just the turbo. I need to fix that before it gives me some problems, I dont drive the car it can wait. Hey supradupra, have you ever taken it to the track or dyno. I want to see what kind of hp and e.t. times I could expect. Well once it is finished.
I hope an hx40 fits in my engine bay on my t3 manifold, lol. Im on the lookout for one to play with and see what I can do with it (hoping for 425-475 on pump )
)it wont let me post pics (not even an avatar)- if anyone can help out with this please pm me- lol.Krister said:
anyway, ill have to remeasure the inducer again- maybe im mistaken, although i dont think i am. it came with that gi-normous exhaust housing which i notched the bolt holes to match a t4 flange. outlet is way too big- i would like a 3 or 3.5in- will 4in downpipe work in am mk3??? if anyone knows where i can get a smaller housing for this (lets say hx50) let me know asap. i think a housing like u have krister, will work good. its the only thing keeping me from using this beast.