closest holset equivilent to a gt35r t4 flanged
 

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Re: closest holset equivilent to a gt35r t4 flanged
 

You're looking for something that spools late and makes medium power?

60-1 with a P-trim wheel and .96 AR turbine

Re: closest holset equivilent to a gt35r t4 flanged
 

HX-40.

Re: closest holset equivilent to a gt35r t4 flanged
 

That makes more than 550 whp. He's looking for an HX35 that spools sluggish.

Re: closest holset equivilent to a gt35r t4 flanged
 

I just gave him size to size, t4 flange. HX-40 is a touch smaller on the compressor, and bigger on the exhaust, but t4 flanged it is the closest in size.

Re: closest holset equivilent to a gt35r t4 flanged
 

HX40 flows a lot more than GT35, in truth HX35 is on a par with it and 60-1.

You can get T4 flange HX35, or at least you can buy bolt on housings. IIRC the smallest comes in at 19 CM^2; I asked Jaymez at Diesel Injection Service in Cinci about it once and that's what he came up with for me. I think that'd spool about like a GT35.

Re: closest holset equivilent to a gt35r t4 flanged
 

Re: closest holset equivilent to a gt35r t4 flanged
 

You can get a 16cm T4 flanged hot side. Now not stock on an hx35, but there were a few hx40's like that.

Here are some interesting things to note:

Hx-35
Specs:
Compressor cover- 4" intake and 2.5" out.
Compressor wheel - Inducer: 56mm, Exducer: 81.8mm
Turbine wheel - Inducer: 60mm, Exducer: 69mm

GT3582R
Compressor cover- 4" intake and 2.5" out.
Compressor wheel - Inducer: 61mm, Exducer: 82mm
Turbine wheel - Inducer: 62mm, Exducer:68

The imho the reason that the HX-35 makes power like the GT35 is 2 reasons
1) The big turbine wheel.
2) Higher efficiency at high boost

Now if you want the closest specs inducer to inducer an HX-40/35 hybrid would fit the bill.

Re: closest holset equivilent to a gt35r t4 flanged
 

Inducer vs inducer isn't a very fair comparison, especially since the Holset has a larger exducer meaning it's higher boost efficiency is through the roof.

Neither is turbine size a good comparison, exactly. It's a good indication of how much a turbo will choke an engine, but the HX35 spools a little better than a GT35 on the same engine.

There's a lot of good design on the Holsets. If they upped the inducer diameters to suit gasoline applications then they'd be true baller turbos.

Re: closest holset equivilent to a gt35r t4 flanged
 

I realize that inducer to inducer isn't even close to relevant, but it is a well published internet way of sizing things... :8

If we want to complicate things further here are three different hx 40 compressor wheels.

Starting with the 8 blade compressor wheel
Attachment 10444

Then the 7 blade
http://i23.photobucket.com/albums/b3...7bladehx40.jpg

Then the 6 blade
Attachment 10445

To make matters worse there are at least two turbine wheels for the hx40 as well, a standard 12 blade, and a higher flow 10 blade. I have specs for these at home, but alas I am at work... So if beer doesn't over take me I will post those up as well. :1

Re: closest holset equivilent to a gt35r t4 flanged
 

So I was going through the maps I have at home vs the maps I have at work, decided I might as well post them both:

Starting with the 8 blade
Attachment 10362

7 Blade (sorry this one is kinda fucked up, has that gap, anyone with basic photo shop skills should be able to fix it, and I would be much obliged)
http://i23.photobucket.com/albums/b3...-7blades-1.jpg

6 Blade
Attachment 10363

Re: closest holset equivilent to a gt35r t4 flanged
 

Ok on to the HX-40 turbine.

Inducer - 63mm
Exducer - 76mm

12 Blade stock wheel
Attachment 10361

10 Blade quick spool wheel
http://i23.photobucket.com/albums/b3...adeturbine.jpg

Now from what I understand from holset the 12 blade has a greater flow efficiency of about 10-12%, but spool and transitional response is greatly improved with the 10 blade. Too the point that you can put the 10 blade in a bigger housing, match the flow of the 12 blade, but still pick up some spool and response.

I'm sorry but I have not yet been able to track down any applications that used the 10 blade stock.

Re: closest holset equivilent to a gt35r t4 flanged
 

I should mention to those who aren't aware that this is going on a rotary. The exhaust pulses are far stronger than that of a piston engine....... Me running a t3 turbo from a volvo on this engine would make it slower boosted than n/a regardless of what psi the wastegate is set to...... A 57 trim t3/t4 would probably choke it off as well.

I haven't decided if i want to use high compression rotors or low compression tII s4 rotors or not yet. I've got to talk to some more people and get some more ideas. I do know this though, a gt35r was one of those turbos that came up alot when i asked for "FC3S turbo that's good for drifting and daily driving" on the forums, google, etc..... 60-1 with a .63a/r hotside came up as well. The stock turbo chokes off somewhere around 250hp and 14?psi i believe. Kain recommended a bnr stage 2 turbo which will make my power goal and have quick spool but i'm not paying 700+ for one and that's only if you have a stock second gen turbo laying around so chock another $50-100 up just to buy the "core"....... I just want something i can make 300 with, spool fast and not worry about going out of it's efficiency range. I'm not getting many hits on the rotary forums so i came here.

As long as i'm making near decent boost at around 4500rpms, i'm fine. I have an 8000rpm redline. It goes past that but that ------- buzzer is annoying......

Re: closest holset equivilent to a gt35r t4 flanged
 

Oh ----. Nevermind. THIS! THIS IS WHAT I NEED!

Re: closest Holset equivilent to a gt35r t4 flanged
 

A rotary is a whole different kettle of fish. ;) I would go the Series 5 turbo rotors, are you porting it? I would recommend an extend port as it helps alot with quicker spool and is still a good streetable port. A hx40 would do the job with at least a 14-16cm rear housing. What vehicle is this going in?

Re: closest holset equivilent to a gt35r t4 flanged
 

You realise there are guys running those $550 brand new with warranty Borg S400s straight out of the box on those, huge turbines and T6 flange and all?

Re: closest Holset equivilent to a gt35r t4 flanged
 

It is.

Stock ports (sleeves and rods removed from 5th and 6th ports by the advice of kain), stock hi-comp rotors, stock n/a intake manifold..... Still working on what i'm doing as far as getting all that ---- to work with a turbo without toasting my motor. I'm shooting for 250hp if i get impatient. Meaning i'll be using ALOT of stock tii parts (sans turbo, manifold and intercooler) and aux injection. 300 if i can wait and save up for stand alone and buy atleast 750cc secondaries and stock tii primaries with a conservative tune. I've got to talk to a few more people and put in another month or so of research before i have something set in stone. I do have a tuner picked out (thank god) so i've gotta touch base wth him on a regular basis so i dont do something stupid. Boost WILL be kept in check properly with a 50mm wastegate. I wouldn't creep with a 40mm but still. I want the extra insurance and refuse to skimp on my build.

So you think an hx40 would be a better bet than a 35 with a 10 blade wheel? Where do you think i'd be making full boost? My desired powerband is 4200rpm and up but if i can make decent boost at 3500 i'll be pretty happy.

Truthfully i was going to import a jdm tii to build up while keeping my current car n/a so i'd have a fresh motor to drop in to save on downtime but i've heard horror stories of blown rear rotors, ass turbos....all kinds of fucked up ----. How pissed would i be to pay $1200-1400 to have a swap dropped off at my house only to find out the rotors have no compression, the coolant seals are gone and the turbo is cracked all to hell on the inside. My plan then shifted to buying an s4 usdm tii as well but to do that i was going to have to pay for a built motor, pay to rebuild a blown motor and STILL have to buy all my turbo goodies or settle for stock. The six port na-t seems to fit my situation and goals better. The only downtime i'd have is test fitting stuff for fab work, installing the complete kit and then an couple hours of dyno time (depending on setup). I dont know why i stressed about it so much but now it's nbd to me.

My car is an fc3S and is being built as a daily driven drift car. I dont plan on regular street swangin, just heading out to local events to practice, meet people, hang out and learn ----, show off my mad tyte jdm parts.... I was never really into jdm parts on hondas. Go figure. I get an rx7 and i'm all over it. Re-amemiya, uras, bn sports, infini, pbm.....good googly moogly! I haven't started a build thread yet simply because i'm not doing anything worth posting right now. It's been fixing the previous owners' ---- ups. The good news is that the motor was rebuilt 13k (verified by a recipt i found crammed in the carpet next to the center console last month when swapping seats) ago by rotorsports racing in kanapolis, NC. My tuner Zac used to work for them and intense motorsports in charlotte. My engine purs like a kitten, doesn't burn any more oil than usual (will be disabling the mop and start premixing one of these days so i wont have to worry about oil burn off) and does not smoke other than a very small amount initial start up before it's warm but that's normal. They did a fantastic job. The kid who owned it before me paid $1200 for parts and labor on a stock rebuild.

Hope this clears things up for you a bit and is a teaser of things to come. Believe me when i say i'm taking this stage of my build SLOW. I dont want any mistakes or fuckups. I damn sure dont want my car to burn down to the ground either.


Joseph Davis: I'm not down for spending large coin all at once on one part but i am down for doing it right within purpose and means. Hopefully now you understand why i want to run "jdm tyte coilovers". I'm just slamming the car down, getting rid of body roll, ass squat, adding front camber, enjoying pillow ball mounts.....stuff like that but on the cheap. I'm telling you i'd love a set of bilstein or ohlins coilovers but they're out of my price range. It's either bomb ass coilovers now on a peice of ---- car or mediocre coilovers now and a decent all around car later. Back to what you were talking about in THIS thread:
They're doing ALOT of crazy ---- that i'm still trying to understand. I've never seen turbos so big until i jumped into the rotary world. Turbo rotaries are something serious. They cant take detonation worth a ---- but they can make big power reliably if built, tuned and maintained properly. We can get away with running very large turbos because rotary exhaust pulses are VERY strong and can spool just about anything.

Re: closest Holset equivilent to a gt35r t4 flanged
 

I don't see how $400 Bilsteins plus $250 GC coilvers vs $500 rusted out crap that doesn't work in the first place is out of you price range? Spend $650 or throw away $500. You aren't logical.


Yeah, notice as soon as you actually said what the turbo was supposed to go on I spoonfed you exactly what you needed, again? Meh, unit I mentioned is a hair big for whoring around on the street, but you can get smaller T4 flanged turbines for $150 extra. So, whats that come to? $700 for a warrantied turbo good for 1000 whp? You can probably find a low mileage diesel unit on eBay if you have a tight budget, they have comparatively big hotsides that would suit a rotary, but a Borg S400 is the ticket if you have some skrill.

Re: closest holset equivilent to a gt35r t4 flanged
 

GC coil sleeves are $430 shipped for my car......
Ebay mk1 pillowball camber uppers are $210 shipped

Using bilstein hd non adjustables, GC coilovers and mk1 (EBAY) pillowball camber plates the total comes out to 1110 shipped. Bilstein says NOT to use lowering kits with these shocks. Go figure.

Using the same coilover/camber combo with kyb AGX's= $1170 shipped

Using the same combo with koni yellows= $1340 shipped

THESE ARE EBAY PRICES! I'd hate to see what retail would come out to and using legit camber plates from super now, pbm, etc....

This isn't a honda. Not everyone has one so companies dont have units fly off the shelves to keep the cost down.




Yes, this is a street car. I dont need 1000hp. I'll be happy enough with a turbo that would support 450 b/c it wouldn't be breaking a sweat at 300 and would give me room if i ever get good enough to utilize a significant bump over 300hp. Yes, the motor i'm using can be capable of rediculous hp with the right combo of porting, tuning, and reliabilty mods (running s5 irons, rotors, housngs, and covers, doweling the "block", using high strength apex seals, v-band intercooler setup....etc. However, i'm running an n/a transmission. (kain offered me a stronger t2 transmission that i'll drive down and pick up when i have time), n/a driveshaft and n/a rear end. My power level and rear grip level are sorely limited by this. I can run a t2 transmission and modify the t2 driveshaft to use my rear end until it blows up but i have 2 na diff's, 1 lsd, 1 ready to be welded up as of 5 minutes ago, 2 na trannys and 2 na driveshafts. No point in swapping over. Not only that, i can buy n/a transmissions dirt cheap for $75 each. People are practically giving open diffs away and the driveshafts dont go for much either. As much of a beating my car is going to get, i'd rather stick with n/a parts on power levels that isn't going to destroy them in short order but if something does go wrong replacements are READILY available and DIRT CHEAP. There is a t2 sitting at a junkyard about 14 miles from my house i'd like to inquire about. If everything checks out and i get off my lazy ass and talk to the man, my goals might change but right now i'm keeping ---- on the real and working with what i have now the best it can possibly be done.

Aaroncake blew his ---- out on his project tina's drivetrain. Was making 400+hp using the n/a drivetrain. GT42r turbo, bridge ported, full stand alone. Transmission was well toasted as well as the rear end if memory serves. The n/a drivetrain can't take those power levels for long, especially if you run really grippy tires and launch hard often. I've been hoping he'd chime in since he's the 6 port turbo god. Guy is on another level. That's for sure.

Hope this sheds a little more light on my choices. I DO APPRECIATE your help and concern. I am on a fairly tight budget. Like i said, i want an all around good car, not just a baller part here and a baller part there on a piece of ----. I have ALOT of stuff i want to do with the car. Not just a turbo kit and decent suspension.

Re: closest holset equivilent to a gt35r t4 flanged
 

. double post/quote

Re: closest holset equivilent to a gt35r t4 flanged
 

From what I can gather, any hx40 is going to be perfect for you.. the stock hx40 exhaust housings are either 17 or 18cm, which is quite large, 1.1 a/r ish on a gas piston motor.... and just right on a rotor motor.

as far as HP support goes, the hx40 compressor options are fairly flexible... and well over the 300hp that setup can handle.

Re: closest holset equivilent to a gt35r t4 flanged
 

Problem: Bilstein says to not put on lowered cars

Solution: Make the top hats taller. Dropping the car 2 inches? Make the top hats 2 inches taller.

Re: closest holset equivilent to a gt35r t4 flanged
 

Problem: Clueless

Solution: Acquire a clue

Re: closest holset equivilent to a gt35r t4 flanged
 

Do what, -------?

Attachment 10188

Re: closest holset equivilent to a gt35r t4 flanged
 

Dropping the car about 4-4.5" all the way around. Without a kit, it will sit about 1.5-2" off the ground. I'll raise it up when i purchase aero. I want my ---- DUMPED. I already bought them anyway. They're sitting on my floor in my room and i just got done sessioning on them with a wire brush to get rid of the surface rust..... Threads are perfect, top hat pillowballs could use a greasing. Other than that, they're straight.


Holset hx40 it is. If i dont like it, i'll swap it out for something else. I've had several votes. Kain is on the same page as jd, trying to make me eat top ramen and easy mac for a couple of months...... BNR stage 4 turbo is $825 with a stock core and that's what he recommended. For that price, a master power 35r looks more appealing. Called rotorsports racing and they said i'd be fine. I'm trying to get ahold of my tuner but he's swamped with ----. Everyone got their tax return and is spending money..... Jakob, the guy i bought my coilovers from is running a bnr turbo. He's got a stock T2 engine he's putting in his car today though. He has no idea what i should do as far as turboing my six port but gave me a few screen names to hit up if i have any questions. He did say my idea to use a T2 ecu, map, afm with t2 primaries and 750cc-ish secondaries should work fine. They'll be a few bugs to work out at first but that's a rotary for ya. He also agreed that i'd need to dowel my block and switch to an s4 rear housing if i plan on making 450 or more. A friend of his ended up completely destroying a motor. It was a 4 port but wasn't doweled. Just a large street port/extended port. He was making around 500hp.

Re: closest holset equivilent to a gt35r t4 flanged
 

Wtf is aero? You still might want to make the tophats taller.. I don't think dumping any kind of shock like you're planning on doing is healthy. If not suit yourself.

Re: closest holset equivilent to a gt35r t4 flanged
 

I'm sorry but I'm not for sale.... lol

Re: closest holset equivilent to a gt35r t4 flanged
 

$200 for an hour of your time! come on!!!!


Seriously, had i known a rotary would kill a holset, i wouldn't have posted.

Re: closest holset equivilent to a gt35r t4 flanged
 

If you're on such a tight budget, I'd suggest you ditch the RX-7.

Anyways if you really are, a Holset is a great choice. Tough turbos, can be purchased cheap with relatively low milage, and can really pump out the power - relative to a turbo Honda's needs at least. The 6-blade HX-40 wheel can do around 68 lb/min, which is more than enough for pump gas - but as you seem to think rotaries are some completely different magical solution, all bets are off. Power pulses be damned, you still need X amount of air to create Y amount of power, so in that respect rotaries aren't different from any other gasoline engine.

If your power goal is 300-450whp, you don't need anything bigger than even an HX-35. An HX-40 has the balls to make over 600whp with the right motor.

Re: closest holset equivilent to a gt35r t4 flanged
 

In my experience a hybrid 40/35 can make over 600whp, and a full hx40 is a lot closer to 700whp.

Re: closest holset equivilent to a gt35r t4 flanged
 

Ditch the rx7, nevar.

Budget? FC's are cheap and easy to fix up. It's the problem of selecting parts. I dont have $1500 or even $1000 to just go out and buy a turbo. I've got $1500 alloted for suspension, $500 for mechanical, $550 for dress up, $400 for interior and there's some extra but i'm probably going to blow that on bullshit that has nothing to do with cars so it's not in the budget. This season is pretty much me getting the car at a good base point for things to come. I'll be buying ---- as i see it along the way but right now, i'm not going to turbo it until this time next year. Have to buy haltech. No if, ands, or buts. NEED GOOD MANAGEMENT.

I'm hearing alot of mixed input on holset turbos on a rotary from ALOT of different sources. It's hard to decide. It's like trying to vote for bush, kerry or nader again.

Re: closest holset equivilent to a gt35r t4 flanged
 

Translation: You're building another useless all-show-no-go ricer princess.

Re: closest holset equivilent to a gt35r t4 flanged
 

Ownd by the noob :-*