Hi,

I currently have a hybrid TO4/Hitachi (Series 5 spec) turbine which was built up in the U.K. It's a definite improvement on stock, but (of course) I want MORE power now (hopefully around 340-360 RWHP).

I am considering either a Garrett GT36-40 (which seem to be giving good results down in Australia) or one of Bryan's (BNR) 60-1 hybrids.

I'd be interested in hearing from anyone who is using one of these, particularly which turbine wheel you are running. Also, what are your experiences with turbo lag - I realise that lag will be worse than my current turbo, but I'd be interested to hear your comments

Many thanks in advance for any feedback

Best wishes

Peter


‘Turboported’ 13B engine

Bigger radiator (K2RD)

3” downpipe and presilencer with 3” into 2 x 2.5” ‘Y’ pipe and tail pipes/silencers

Hybrid Garrett TO4 compressor/OEM Hitachi turbine

BIG Greddy FMIC

Denso 550 cc/min primaries with Bosch 1600 cc/min secondaries (far too big, as I have found out !)

Walboro uprated fuel pump

Microtech MT8 ECU (nice product – would have been even nicer if they’d bothered to make it so that it could run the RX-7 metering oil pump)

Greddy front strut tower brace/Cusco rear strut tower brace

Tokiko ‘Illumina’ top adjustable struts/Eibach ‘Pro-Sport’ lowered, progressive rate springs

Racing Beat uprated anti-roll (sway) bars front and rear with Racing Beat (front)/Mazdatrix (rear) links.

Uprated polyurethane bushes in all suspension arms

RH Alurad six spoke alloys, 8 x 17” with Yokohama A 520’s, 215/45Z17R (soon to be replaced with Toyo F1 Proxes).

Goes a bit better than the standard car

 

Thats a pretty good mod list you have there. I have no experiences with upgraded turbos as I am still stock but I was wondering how much power you are putting down with that setup.

 

if u want 350 or more RWHP hybrid is not going to take you there

 

I have the BNR Stage IV. it is a t04b compressor housing, 60-1 wheel. Stock S5 turbine housing, with a p-trim (housing has been bored out). the p-trim is clipped a little.

BLUE TII has basically the same turbo. He has welded an external wastegate onto the existing housing. He had an o-trim but it spools to quick and causes way too much boost creep. He did get boost by 2500 rpm, though, but it would creep past 22psi. This is as i recall. he might hop on this thread and give some of his own comments.

My car doesn't run yet, but he spins his tires at 6000 rpm in third gear. I am expecting in excess of 350rwhp. He is expecting 300rwhp with "a lot of icing" and he probably already has that, untuned.

email Bryan and he can discuss specifics with you. bnrsupercars@aol.com

a GT35/40R (which is what i think you mean, i haven't heard of a 36/40) is good for way more than 360rwhp, though. i am considering it for a further-down-the-line setup.

 

Higgi, you don't think so? Why not?

 

Hi, $150FC,

Thanks for the feedback. Your BNR 60-1 set-up sounds pretty much like what I had in mind. I would be very grateful if you could let me know how this works out when you get it running (peterball@beeb.net).

Sorry, yes, I did mean GT35/40 - my typing is even worse than I thought !

ilike2eatricers - the guy who did my car failed (along with a few other things) to give me a dyno read-out, but my 'seat-of-the-pants' guess (seconded by a couple of more experienced 'pilots' who have a lot of experience setting up 'hot' RX-7's) is around 320 RWHP.

Best wishes

Peter

 

get a full to4 60-1. not a hybrid. new manifold and external wastegate.

 

Hey Peter.

340-350 RWHP is attainable from a hybrid. A few customers of mine have done 12.3 at 114 and dynoed 332 RWHP on a stage 2 hybrid. The customer that ran the 12.3 jumped from the stage 2 to the stage 3 and said at the same boost level he noticed a big difference in power.

The bad thing about a stage 2-3, you can only run 15 psi max on the stock turbine wheel that is clipped 15 degrees. If the turbine wheel is unclipped, you will not be able to hold peek boost once you get it up there to 12-13 psi. After that the boost jumps and the car feels like it hits a headwind b/c of excess backpressure in the turbine housing/manifold.

The stage 4 has a "P" trim turbine wheel that is machined to fit the factory turbine housing. This decreases backpressure, and also increases efficiency of the stock turbine housing. With a stage 4 you can achieve anywhere from 350-370 max at or below 17 psi.

I think that if you are on a budget and cant afford the manifold/wastegate/custom DP, intake and oil lines, then a hybrid is your way to go. I am not saying that a hybrid is the best way to go. It has its pro's and con's.

Bryan
www.bnrsupercars.com
bnrsupercars@aol.com

 

anyone have dyno's of the stage 2-3? when does it get full boost?

 

I cant build boost with my BNR!

 

I have a stage bnr stage 3 and a rx7trix street ported motor and it takes a while to start building boost maybe around 4000rpms or alittle more..it seems laggy to me but I come from a 3rdgen rx7 to a 2ndgen so its different to me..

 

from what i read, the stage 3 BNRs are having problems...im gonna go for the stage 2

 

I have the stage 4 BNR, and as of now, I am pleased with the turbo. True, it is a tad bit laggy, but thats probably due to insufficient tuning on my part. Bryan also lets you know that you will experience some lag. Its part of the design. Once spooled, that turbo is a MADMAN! I havent gotten it to the track/dyno yet, but when I do, I will post results.

Rat

 

My stage II spooled fine

 

Ya I expected it to be laggy, however I pushed it a tad over 7k without ever seeing the boost gauge go past 8psi. I thought I was suppose to be spooled by 4k... but whatever, I am not the only one with this problem with a stage 3 I think a member on here( Rpeck) said he had to get his BNR stage 3 redone by someplace else. I will probably have to do the same thing.

 

whats the turnaround time on a stage 4? im planning on getting one, but ive heard of people wait months to get it back.

 

hmm...whats the turn around on a stage 2? :-p thats what ill be getting .

 

Ok folks I am finally getting somwhere with this turbo, bryan gave me some tuning tips and it seems to be working. I have now built 11 psi and will work more with it tommorow. Anyhow things look like they are moving in the right direction

 

Hello Everyone. I am not backed up at the moment, so turnaround time will be minimal. I am working on a new site right now and hopefully it will be done this month. Keep your fingers crossed.

Bryan
BNRsupercars@aol.com

 

Sorry to hijack but I didn't wanna start a thread for a small question. Will a stage 2 require a FMIC? or can it be ran on the TMIC.

 

I ran the stage one on the stock top mount for almost a year and it ran fine, but when I went Greddy FMIC it was much better! It pulled ALOT harder at any RPM.

 

You can do it with the top mount, but like 95nracer said, a FMIC will help lots.

 

The stage 2 would work with the TMIC, but a FMIC would be way more effective b/c you can run more boost to put the compressor wheel in its sweet spot. Then you really start having fun. 13-16 psi is ideal for the stage 2. A customer actually made 332 RWHP at 14 psi with the stock TMIC!

Bryan
BNRsupercars@aol.com

 

Jeez thats crazy, can't wait to get some money and get that BNR.

 

I talked to Bryan of BNR and he answered all my questions abouy his hybrid upgrades. Im still waiting for mine........... My shop sent my turbo to the wrong rx7 store (rx7store.com - rx7 trix) instead of the real rx7 store in OH. So rx7 trix calls me up and says they can do me a hybrid for the same price but I told them I deal with the rx7 strore in OH and they tell me no problem and they would ship it out right away (hahaha) that was like 3 weeks ago. So now my turbo is out there someplace and my car is still in the shop ........... waiting ......... waiting ...........

Hi Jacked by RX7 Trixs