All my questions about Holset..
 

First of all this is an S4 TII with a streetport on it from Rick's Rotary. 3mm apex seals, no emissions, no power steering, no a/cm etc..if my car runs cool enough though I'm throwing the damn a/c back on!

I've got 720cc//1000cc injector setup with a Cosmo fuel pump
I've got the ems, water/meth injection, fmic etc..pretty much the supporting mods.
Keep in mind though, my motor is NOT dowel pinned or anything and I know the S4 rear iron isn't as tough as the S5 ones...

Also note: I get to use shitty CA 91 octane :D..but the meth water 50/50 spray should help some.

The car is going to be used for Drag, minimal street driving, and trips to Thunder Hill, Infineon, etc..

Anyways I sold my BNR so I'd commit to buying a bigger single and going forward with the setup. I wasn't a fan of my BNR since it really didn't have that great of response. I rode in a friend's TII with a MasterPower T70 and when he hit boost his car screamed...mine kinda just wasn't as responsive as a big T70 even so that was just a huge disappointment. :icon_tdow

-HX40 (4" inlet with antisurge housing, 4" exhaust, T4 with 19cm^2 AR) (Still not sure on the compressor wheel specs...:scratch:)
-divided tubular manifold
-4" downpipe
-Jacob's FC1000

That's all I've got at this point.

Here's the questions:

1)The catback I have now is the Greddy Power Extreme duals...I think the y-pipe is like 2.75" and each pipe is 2.5".....how much is this going to kill my power? I love this exhaust and I know J-Rat is running the Racing Beat duals and he's pushing 500+...just wanted to know how much it will hurt me. So I wanted to know if anyone has built a nice QUIET dual catback that's 4" to possibly dual 3" or something...I really want to stay dual.

2)720//1000 isn't enough fuel is it? I'll need some 1600cc secondary's right?

3)Will the cosmo fuel pump flow enough or am I going to have to get a bigger in tank pump or a boost-a-pump?

4)About how much power can I expect, and at what rpm will I be making what psi? I'm not looking for crazy power...just 400, possibly up to 450...any more than that is a bit much for me...and I don't want to run the turbo at some super weak boost levels that are way below its efficiency level. That also makes me ask, what would be a good boost level to run?

5)^That provoked the question of, would it just be better to get the HX35 and somehow use the HX40 hotside with the T4 flange? I don't want to run the T3 flange, but the HX35 should spool faster than an HX40, so that was a plus.

6)Is just using an air horn type intake with no filter a really bad idea on a street car? Another option I was looking at was using an HKS filter (But it costs $160 :icon_no2:) made for the 300zx twin turbo as it has a 4" inlet and I'm a fan of how well the HKS filters flow. (I know they don't filter as well as others, but I'm just wanting stuff big enough to damage the turbo to be kept out.

7)Is the 19cm housing going to be responsive? I'm getting way too many mixed reviews...people saying the 19 will lag, yet I'm finding people happy with a 22, then some are even running 28s! I just want to get some input on this..

8)I saw some people were having TONS of issues keeping the boost levels low enough too with their wastegates. Is a 50 MM wastegate going to be absolutely needed to keep the boost at a reasonable level?

9)Do I need to run an oil restrictor pellet or something on the oil line? If so what size?

10)I have a custom intercooler...it's pretty much the same size as the Greddy Unit, but it's a bar and plate design rather than tube and fin. The endtanks have 2.5" outlets and my piping is all 2.5" ID...is this going to be a restriction?

I'm sure I'll come up with more questions...

Thanks
-Nick

wow that's alot of questions, just so you don't run out of fuel the cheapest way to go is two walbro pumps, 50mm wastegate is good enuff, no need to run a restrictor for the oil, holsets love oil, and finally everyone's setup is different so you'll just have to run what you have and see how it works for you then you can make changes.

I figured 50 would be enough, but is a 44 not enough? And I'd rather save money and work with what I've got if I can...no need for a custom dual walboro...J-Rat is running a single Walboro I believe and hes past 500 rwhp.

J-rat is now running dual walbro's and a LOT of meth to get to 550rwhp.. I'm not sure the capabilities of the cosmo, but at minimum boost-a-pump would be needed.. I'm out of fuel for sure with my single walbro and H1e at 8psi.. I would recommend setting up the fuel right the first time.

Also, I think J-rat's racing beat is probably holding him back power-wise. I will eventually be building him a custom dual 3" to maximize flow and remain relatively quiet in comparison to a single 4".

720/1000's wont be enough. I'm running 4x ID1000's (run higher duty cycle than other 1000's, and am out of injector) at 50psi base. My current plan is use the single walbro to an inline 044 and bump base to 80psi and the 4x ID1000's will be enough. I would recommend against 1600 secondaries as they are a pain to tune in comparison to the ID1000's, but are the easiest way to get more fuel..

I would stick with the T4 HX40, my H1E spools better than a stock TII and makes about 400whp at 8psi. I'm not saying your setup would be that responsive or make that much power, but it should definitely fulfill your expectations... If you are running a raceport, you would want bigger than a 19 hotside, but if you have a stock or streetport, the 19 should be fine. I would go dual 38's over a single 50 if you can, especially with the sweet new MSV 38's.. You might be able to get away with a single 44, once again depends upon port and exhaust also..

I ran without a oil restrictor initially, but was smoking, so put in a ~.060 (don't remember exactly since I machined it myself...) and was fine after that.

I'm running 2.5" IC piping on the hotpipe and it doesn't seem to be a problem, however I have next to no length of tubing since its a v-mount.

Hope that helps!

Sorry, didn't read your whole post. I would say your exhaust will probably be fine, J-rat is pushing his car to the extreme, so that is why I would say his is starting to hold him back.. At 400-450, the 2.5" duals should be fine.

The manifold I'm getting limits me to a single wastegate, which is why I was asking if I'd need a 50mm =/ - Was looking at Synapse or Tial

I'm running a streetported motor so it looks like the 19 is a good choice :)

http://www.puredieselpower.com/catal...ipe-p-219.html
^Going to be picking up that downpipe, as another forum member said that if you chop the center section and shorten it it fits really well. And it's pretty cheap too..

The big deal with the injectors is that I'd really like to have them fit in the stock rails...save me some money.

I'll look into my fuel pump options.

The ID1000's will drop into stock top feed rails...

TTT for more questions!

Oh and my buddy is running a single Walboro and has enough fuel for 380 rwhp with his MP T70...you guys sure I need more fuel?

If you're running a lot of meth and don't want any room to grow, you could probably get away with the single. I would recommend logging fuel pressure or at least have a gauge you can see to make sure you're not running out of pump...

j-rat sux...

no, J-rat just needs a holset... :D

J-Rat is sloowwwwww

And increasing the base pressure seems like it would cost more money in the long run...I know you're not supposed to cheap out on stuff, but I'd like to keep costs to a minimum. (ie...don't want to end up buying 2 fuel pumps or making a custom setup, etc etc..)

i have a holeset hx52 and holeset h2e :) the hx52 is sexy...30psi builds fast and easily

I got 35w, with the fancy blades, but need a GT40 or hx52-55.I actually have a H2E laying around anyone running one of them?

http://www.dsmtuners.com/forums/turb...et-turbos.html

This thread is were the Holset gods are lol. ive read every page many times. it is VERY good info. there is also another holset thread floating around that forum thats very good.

Edit: Look on page 21 (last page) There are links on it and summary info on holsets

the h2e is an awesome turbo also...only problem i had was the hotside was elongated too much that it wouldnt fit on my current manifold...thre is another hotside you can pick up yet i couldnt find one

Well i just figured out my 35w is blowin oil. theres no shaft play just lots of oil. So the H2E i have the shaft prolly moves sided to sided half inch and in and out about half inch. I have to rebuild one and i was thiking about the H2E, the flange on that is like a t5 or somthing corrrect? right now i have a t4 manifold with a custom expansion adapter from t4-t3

i'll trade you 2 1600's for 2 of something smaller, i have 4 1600's right now and would like my primarys to be a little smaller.

dont quote me but i believe its a T25 flange?? either way its a hair bigger bolt spacing than the T4 however you can drill out the bolt holes a hair and it will fit a T4 just fine..thats what i did

Def not a t25 flange, thats tiny. I think its just called an HX50 flange, yeah bolt spacing just slightly wider than a t4. I believe there's some adapters on ebay for like $50 or something.

Im running the H1E with full 4in exhaust dp on back with just a burns resonator. single walbro 550 1600 and make 410 to the ground and get full boost by 3500 ish. never see injector dutys over 85.

thats what i thought also...however i read somewhere that was what the flange was called...its basically a t4 flange with different bolt spacing t25 > t4 in number size btw :) but im sure im wrong

How much boost?

15

Hmm...410 is pushing the walboro's limit on the rotary isn't it? I'm going to drive my car around at about 11 psi or as low as I can get it with my Cosmo (similar flow as walboro) until I can afford a Supra pump..then it's 21 psi time!:devil: