Boxer2rotary

iTrader: (8)

Not sure. Hoping to get on the dyno by this weekend. Car goes good, holds boost past 7500rpms. I will post results soon.

vitafist

It is not good video but we get the point. 16psi at 3800rpm. I am going to use full-race's manifold which will have aproximatelly 200rpm slower spool due to large primaries. The difference from your setup is that i have t4 divided exhaust housing and manifold and two wastegates that suppose to give me faster spool and better boost balance. So hopefully i am going to spool same as you. Any porting job on yours?

Boxer2rotary

iTrader: (8)

I have a Dave gibson street port (not sure how large that is). the exhaust ports are ported pretty good as well. I have the 1.06 housing which is a slower spool than an .82 would have been.

I am suppose to head to my buddies dyno tonight if he gets back to the shop in time. I will have good quality video with a flip camera at that point. I will keep you posted on the thread.

Boxer2rotary

iTrader: (8)

Is this your setup you are going to have? If you read down a bit to "uncle harry's" post he gets 13psi at 3800rpms on a regular T4 35r.

https://www.rx7club.com/3rd-generation-specific-1993-2002-16/full-race-turbo-manifold-856090/

Double_J

iTrader: (28)

Can you give a bit more info on your setup? You say 16lbs by 3800, but what is your max boost when you are achieving that? I might have missed it but do you have a short or long manifold, single or twin wastegate, rerouted to the down pipe or to the atmosphere?

Thanks

Boxer2rotary

iTrader: (8)

I did that run just for this thread it was only a 16psi max run I have a aspec short runner street port single wastegate rerouted. I went to the dyno tonight but the clamp for rpms and torque was missing a magnet so no torque or rpm readings. The car feels like it is low on compression a bit. Made 437whp 19psi and 470whp 21psi. No knock at all
i could probably lean it out a bit and advance timing but I want to check compression first. i had it set for 23 on the 19psi runs and 25psi on the 21 psi runs. I am using a blitz sbc-id and i think the gains have to be higher or I need a manual boost controller because it will hit the set boost but is only making the lower boost numbers list above in the upper rpms and the line is up and down on the graph.

Zero R

iTrader: (1)

Don't you find that a bit hard to buy? Physics is physics. A inducer the same size essentially as a 67mm a larger (10mm) exducer and essentially the same sized turbine wheel? That's a bit more compressor to push for the same sized turbine wheel. Imagine if we took a 35R and made the comp exducer 92mm how laggy that would become. My guess is no, and I'm not saying you're wrong, I'm wondering who is saying that and what the comparisons actually were, ie T3 to T4? T3 to undivided T4? Maybe aero had some effect but even still rotational mass has grown.

~S~

vitafist

Uncle Harry uses T4, thinks undivided,with 1.06 a/r and usual 3582r
I am going to use T4 divided with 1.00 a/r and hta 3586r billet.
So i will be very close to him if not better regarding spool and whp.
He is also uses very aggressive port. I will try stock port in order to see beter exchausts speed and pressure, more heat because of that of course, but hoppefully better spool.
It will be very close "battle" bewtween these two setups. My opinion is that the tuning part will be the most crucial.
Another factor will be the fuel!!!In Greece we have available 100 octane fuel everywere. I heard, correct me if i am wrong, that is rare in US.

Boxer2rotary

iTrader: (8)

Just an update. That spool up and those power numbers were with only 60psi in the rear housing. I would think spool would be improved and so will power output with a good compression motor. Good thing its winter time.

Boxer2rotary

iTrader: (8)

Well they have a 86 exducer on the 35r and it spools up great on my motor that has bad compression. I don't see any more lag verses a normal 35r.

vitafist

Nearly there....


FP 3586r, dual Tial mvr 44 wastegates.

Jobro

iTrader: (2)

You don't need a manual boost controller you need a mapable electronic boost controller and a stronger wastegate spring. A standard 1.06 GT35R is already in turbine section choke on a 13B motor. Bringing more compressor wheel to the equation is not going to do anything good. Most likely you have excessive exhaust manifold pressure at any rpm above 5000 when boost above 15psi.

21psi in your intake, probably 30psi in your exhaust manifold, no wonder your boost controller is having a hard time when the wastegate is unseating by itself.

If your happy with 440rwhp/530BHP buy a 1.06 GT35R if you want more buy a T04Z 1.0. No amount of marketing is going to allow a poorly matched turbo to make the power of a big one with the response of a small one

Liborek

Common sense is something rare in these days. Just small searching holds answer. GT35R maxxed out on turbine on stockport engine by 20-21 psi boost. Mated to P-trim turbine and good for maxxing out compressor

Exactly. I´m not sure if it is in this thread, but claims that T4 flanged T3 housing flows more than regular T3

Boxer2rotary

iTrader: (8)

I am not lacking common sense. I already had a t3 single 35r setup from the previous owner and the turbo was bad so I figured I would try the 3586 to see if it was any better than a regular 35r rather than swapping my whole setup out. I did plenty of searches and don't disagree with the 35r t3 being choked up top and I'm not arguing that its better than a good t4 setup because its not. I will be switching to a t4 over the fall once I save a little money.

As for the boost controller what do you recommend? I'm using a blitz sbc-I'd and a 1bar spring in a tial 46mm.

Boxer2rotary

iTrader: (8)

I have a large street port not stock ports so me running 23psi is pushing It a bit for now. I usually leave the boost at 20psi anyways. Car is fun to drive but Jobro is right, If you want low 400whp t3 is fine but leaves no room to make more power, I maxed out at 470. T3 35r works hard to make the same power at 20 that a billet 67 makes at 14. My next setup is a precision billet 67.

arghx

iTrader: (3)

Did you try raising the gain on the controller first?

Boost controller comparison chart is here https://www.rx7club.com/3rd-generation-specific-1993-2002-16/electronic-boost-controller-comparison-chart-952767/ . The Blitz SBC controllers use an unconventional valve unit. If you really want to switch controllers I'd go with something that uses a 3 port solenoid--basically anything on that list there that isn't Blitz

Boxer2rotary

iTrader: (8)

have the gain at around 30 which is decently high. I was going to raise it a bit as it goes up to .50.

smg944

iTrader: (34)

boxer where in ct are you located? would be nice to meet up with fellow single turbo fd owners. only 1 other here in ri that i know of.

G's 3rd Gen

iTrader: (11)

So what numbers are the t4 35r 1.06 guys making at 20 psi w/ a bit of water/meth injection? JUst trying to get a comparison to correlate my numbers here soon. It will be a healthy streetport engine. G

Boxer2rotary

iTrader: (8)

You can do a search for the normal t4 35r Dyno numbers here on the forums as there are quite a few with that setup. I would think similar numbers to mine maybe a bit lower and I run meth as well.

Boxer2rotary

iTrader: (8)

Branford which is about hour to RI border.

G's 3rd Gen

iTrader: (11)

Thanks. Sounds about right. I made 423 @ 17psi on straight 93 octane for a while. Never had a problem. Going to be bumping up to id 2000's in the rear and aeromotive 340lph. and shoot for 20-21 psi on high boost setting with 50/50 water meth sprayed. Hopefully get the 450 mark. G

Boxer2rotary

iTrader: (8)

What do you have for injectors now? I never came close to high IDC with 550/1680. Then again I run (2) 760cc AI jets at about 80%.

G's 3rd Gen

iTrader: (11)

550's and 1600's. Do you think I would be ok since there is some meth. involved (50/50 h20/meth.)? I purchased an aquamist 2D systemw/ an injection amplifier. I was reading where it is better to run a bit higher duty cycles w/ this kit because it sprays according to what it reads from the injector voltage output. I just didnt want to be pushing it too close. It would be nice not to have to spend the extra $$. 450 whp is my goal. G

smg944

iTrader: (34)

i made 480whp with 550/1600 injectors on race gas but not too extreme of an afr 11.8. idc was 90% so it was getting up there. you could add in some meth that would help out lower your idc as it is a fuel. 450whp should be fine with 550/1600's though.

boxer we need to setup a meet for some rx7s around the area. maybe meet midway near the casinos or at a track... something. i havent been to a nice rotary meet since 07 in cape cod.