GT4094R Experiences
 

Here is my spool up from a 3rd gear pull, around 2500rpm until...whenever.

http://home.columbus.rr.com/dv8/z/Lo...0_image001.gif

Here is a 3rd gear pull from tonight. This time I ran the boost control turned on but on the lowest settings. Very surprised it still pulled a little higher to 1.26 bars.

Rpm Kph Boost
2375 48 -417
2380 48 -393
2387 48 -324
2400 48 -291
2401 48 -277
2413 48 -257
2430 48 -177
2454 49 -78
2472 49 -50
2490 49 -27
2521 50 -16
2542 50 -8
2569 50 0
2596 51 1
2633 51 3
2646 52 4
2682 52 6
2719 53 8
2761 54 9
2795 54 11
2829 55 12
2856 56 13
2896 56 14
2935 57 15
2976 58 16
3015 59 17
3048 59 18
3094 60 20
3138 61 21
3186 62 22
3227 63 23
3266 64 24
3299 65 26
3337 66 28
3395 66 30
3451 67 32
3496 68 34
3547 69 36
3578 70 37
3626 71 39
3678 72 42
3712 73 44
3757 73 46
3812 74 49
3828 75 52
3883 77 56
3970 78 60
4043 79 64
4089 80 68
4127 81 72
4189 82 76
4256 83 82
4337 84 89
4403 85 94
4472 86 99
4559 87 101
4641 88 102
4719 89 103
4801 91 103
4898 92 103
4986 93 104
5043 95 106
5129 96 107
5241 98 109
5326 100 111
5419 101 112
5547 103 114
5609 105 115
5707 107 116
5809 108 118
5868 110 118
5980 112 119
6082 114 120
6172 116 121
6270 118 121
6382 120 122
6504 122 123
6596 124 123
6684 126 123
6768 128 124
6880 130 125
6989 132 126
7075 134 126
7156 136 126
7239 138 125
7324 140 125
6843 141 -460

Here is yours:

http://home.columbus.rr.com/dv8/sk8/...s/image002.gif

I reached 1 bar at 4472 rpm (.99bars) or 4559rpm (1.01bars).
I think you are looking at the speed verse boost on that pull.

You are right. I got that from your other thread were you said it was a 3rd gear pull.

re-graph!

So, how do you guys like your larger 4094R? Sure wish that turbo was out when I bought my kit. I'm ready to see some dyno numbers.

Dee E.

The turbo loves to flow. In direct comparison to the GT40r, it makes more power per psi. Spools a little slower than the Gt40r ( I had a custom compressor wheel on it) but it drives nice.

On my large street turbo it's not going to make 600rwhp at 27psi. But I will get it close!

Did you get your boost bleed down issue resovled?
Tony

well I may go get some base pulls this week on low boost (17.5psi on pump 93) but it will be awhile before I get any real numbers with c16. But I am very curious to see were it is now!

higher boost this morning
 

http://home.columbus.rr.com/dv8/my%20car%20engine.jpg
Thx to TrJackson for the pic from the 7/7/7 meet at the Rx7Store.

4094
 

Here is mine.

Mike, your engine bay looks great man! Yours too Tony :bigthumb:

https://www.rx7club.com/attachment.p...9&d=1184008592

Thanks Rich!

So I confirmed last night it is a .9 bar spring. So either I have the 3 bar set up wrong or have another issue. I am going to try and find a one way check valve and run it inline to another boost gauge under the hood to confirm and compare..

Turn the controller off and see what you hit for the WG pressure.

Tony, I do not even have the controller in line. I am just running the side of gate to mani and top of gate vented! So it is not the controller.

A/R Ratio on GT4094R
 

I'm interested in buying one of these too. The spool up is very quick for such a large turbo!
Asleep, what is the A/R ratio (exhaust) of the GT4094R you tested here? 0.85, 0.95 or 1.06?

yeah id like to know that too. im thinking about running this turbo or the GT4088R or the T04Z not sure yet. It's for a track car, i liked the spoolup with my T04E. But need some more HP :P

JT

hmmm..... i should plot a log of my GT42 with the 102mm wheel not the 94, journal bearing not BB also

interesting

I used to run a PT67 (T04r) Ptrim 1.15 AR, and thought it was perty laggy for the size of the turbo compared to the 42 now.. which is a 1.01 hotside and a much bigger turbine

Anymore news Asleep? I made a few pulls on mine and best was 504rwhp at 22.5psi. I will post the dyno sheet as soon as it is sent to me. But I will mention I am not 100% in belief of the dyno as I was having issues the complete time. Rpms would match down low and then be differant up top. Also had a pull that I went to 7500 rpm (datloged) and they only showed me going to 6k?? The I looked at my log again and saw a spot were I went from 7500rpm to 7020rpm and then back up. May be an ignition read era?

I just tuned a car with this turbo and it made 505 rwhp at 20 lbs. Full boost was around 4500 rpm. We did a pull at 21 lbs and it was around 525 RWHP.

Jason

HB or FB?

yes you should :D although im going to bridge a cosmo re, not sp rew

Answers to PM's and messages above...the graphs were with the .95 AR. I have a 1.06 AR waiting.

Mike,

Nothing new. I am enjoying the car and putting miles on it. About 6K this summer so far. I need brakes so no racing the last month or so. Car pulls harder after fine-tuning on the street. The car is ready for another dyno session in the cooler weather.

I would like to investigate a new wastegate, possibly a new manifold or better optimized WG placement, a new 4" dp with the 1.06 AR, WI, and a couple of other things that I need to test before commenting on.

Since the RL Traction Control is working great, I may cut down in tire width and size...the 315's are BIG. I needed it for traction before the TC was working. Sure saves on tire life as well.

Tony