ETS-Pro Center Diff Torque Split Controller for R32 R33 R34 Skyline GT-R

[Full-Race Geoff]

4 comments to respond to your points

-the reason I suggest to hardwire the pump is not for an increase in fluid pressure, it is for consistency in fluid pressure. When the line pressure is logged (pre solenoid there are fluctuations unless the pump is on) of course some people may opt not to do that, and like you suggested keep the stock system in place and use the ets pro just to control the solenoid

-As an experiment early on I left the pump running on my test-stand workbench for 48 hours straight at 150psi xfer pressure. It did not miss a beat or have any problems, in fact that is the unit in my car currently. This is well designed and well built

-We have not seen any failed accumulators in any of the units we have run. Maybe it is unusual but hasnt happened to any of these cars

-We are aware of the components for this system. When I refer to "the pump" it means the entire assy which mounts above the rear differential on an R32 GTR. sorry to confuse you


^^^this entire assembly is what i call the pump. there is a feed hose, return hose and pressure hose, then there is a solenoid to regulate xfer pressure. if this has an issue i suggest to replace the entire unit, they are pretty easy to get used in good condition. the same pump is on gts4, stageas, many others

[tk80]

anyone on here bought and installed one of these yet? i need to make a decision asap on which controller to buy but want to hear feedback.

[RJT]

Originally Posted by tk80

anyone on here bought and installed one of these yet? i need to make a decision asap on which controller to buy but want to hear feedback.

+1

Not doubting its any good, just want to hear feedback

[Full-Race Geoff]

We have sold quite a few of these recently, Im surprised nobody else has posted up yet. Here is an email correspondence you might be interested to read:

Originally Posted by trent

"I was hoping to trouble you for a little feedback on the ets pro system from fullrace. Firstly, what sort of hp and weight is your car and have you done any other modifications to the fwd system? Have you done any back to back testing at a track to determine the improvement in lap times. What are the characteristics of the car now...any understeer? Do you have to continually adjust the dial? Any breakages or maintenance issues since installing the unit? Look forward to your reply. Thanks Trent

Paul's response to trent:

Originally Posted by paul

Hi Trent

My car is putting out 453 kilowatts or 607 HP at the wheels and weighs 1280 KG or 2822 pounds.

I found my lap times improved instantly. I picked up 3 seconds off my personal best 2nd lap out with the unit installed straight out of the box. Since then I have played a little with the software and picked up another second. Since fitting the unit it has allowed us to focus on other aspects of the car for improvement due to the unit giving us a consistent and reliable operating 4wd system.

I have done extensive testing with the unit and as far as the adjustment dial goes you can dial in as much or a little understeer/oversteer as you want. Once you have found what suits you the car the track ECT you just leave it where it is and no further adjustment is needed, unless tyres go off or the track/road surface changes then you may want to trim the dial a little.

It's really easy to setup, I normally get in the car turn the dial all the way off and do a lap or two gradually dialling in more until I have the car driving the way I want it to. It then stays there for the rest of the day.

The transfer case I used initially had been modified. The mod we did was to add an extra clutch plate to give a bit more preload. this worked fine with the unit. We pulled the transfer out after several intense track days and found everything as it should be no evidence of burnt oil or clutch material. Maintenance would not be an issue in our opinion apart from normal oil changes.

We have now replaced the modified transfer case with a stock unit out of a car that had done over 80K miles.

The reason for this was we put a Hollinger sequential 6 speed gear box in the car and in the process we modified the gear stick with an all metal bush on the bottom of the gear stick. The bush was not fitted correctly and fell into the transfer case. As we were in the middle of a race day we didn't have time to pull the transfer apart and try to find the bush so we just fitted our spare transfer case to finish the day.

We have now done 4 more race days and 5 testing days with the stock transfer case and have found lap times and the overall performance of the car to be much same as when we had the modified box in the car.

Since fitting the unit we have had that much more grip it has allowed us to play around with the car a lot, especially tyres. If your interested let me know and i'll give you a bit of a rundown on the tyre side of things?

I hope this answers your questions if there is anything else you need please let me know.

Cheers
Paul

last email response:

Originally Posted by trent

Thanks for the quick reply. I'm amazed that this mod can alter lap times by a matter of seconds. Are we talking 5min + laps or sub 2 or 3min laps? Do you have any data/video to illustrate the improvement in lap time? A friend of mine mark berry here in australia is about to test this system back to back with the locally made ruzic controller in his time attack gtr. If your experience and his testing show the same improvements, full race will sell hundreds of these units into australia as the gtr scene is very big out here.

mark berry is testing this unit for WTAC next month, I for one am excited to see what he thinks and how the unit performs at this level of competition

[Full-Race Geoff]

most recent response (I hope paul/trent dont mind my sharing this, as I think everyone reading would be interested)

Originally Posted by Paul Cahill

I'm in Melbourne and have been doing most of my testing at Sandown and Phillip Island. I've got lots of video using VBOX with GPS lap timing.

Basically I was doing consistent mid 1:44s at the Island. I put this unit in and 2 nd lap out I did a mid 1:41s. After some tweaking I have done a mid 1:40s and am consistently running low 1:41s.

Same thing at Sandown I was running high 1:17s now consistent mid 1:15s. The car has done 1:37s at the Island in the hands of a pro driver. We had changed a few things in the setup and were getting a fair bit of bump steer. We believe the car will do a 1:35s in the right hands and correct setup.

This unit allowed me to get on the throttle earlier as drive to the front wheels was instant and predictable. Before I had the unit in the car I had masses of oversteer out of corners and mid way through high speed sweepers. You can set the car up how ever you prefer with the gain dial. UNDER/OVER STEER

I did look at the Ruzic, but as it was a piggy back system I didn't go that way. I know they have just released a new unit but I don't know much about it.

The other reason I went with this unit is because it is a stand alone unit and you can get rid of all the factory wiring and computer. This was of great interest to me as a weight saving and as the car is a track only car it was rewired and the factory unit was just not an option in any form.

Are you building a car?

Cheers

Paul

[Adam Kindness]

Our is now fitted and we'll be racing both cars this weekend.

It was installed by Wallace Performance - they commented on how easy the installation was. I've left all the orig gear in place just now.

Tested it in a carpark on Manual - behaved as expected. With Dial at min the car turned freely at slow speed. At Max the car bunnyhopped and clunked round.

Fee's VBOX has been playing up but hopefully it'll work on sunday and we'll see some dry weather.

[Adam Kindness]

for reference we have it wired at the solenoid under the floor.

[Full-Race Geoff]

thanks adam - it sounds like the system is working for you. Please clarify that the original wiring and ecu were left entirely in place, and all you did was connect the ETS-Pro directly to the solenoid? That is what I expect was done, very simple install that way. looking forwards to hearing your input, even in the wet

[Adam Kindness]

correct - Fee got a 1st place and a 2nd but also crashed in qualy LOL. I'll let her comment but she says she prefers it to the previous setup. Much more grip out of corners.

She settled with it set to around 50% on Auto (she runs quite hard slicks and struggles with tyre temps).

Sadly she didnt get VBOX logs again but I know she didnt set any PB lap times.

[Full-Race Geoff]

happy to know she prefers our system. She got a 1st and 2nd, congratulations!! Is that a typical finish for you or is the competition fierce in your class? sorry to hear she crashed in qualifying, but it must not have been too severe if you came out and took 1st/2nd

edit: If you dont mind sharing what tire, spring rate and differential combination are you using?

[Adam Kindness]

medium/hard compound pirelli slicks
NO1 TX box
Swapped to OE rear diff and still on OE front diff

I was expecting her to take 1st in both races.

[tk80]

come on fee...where's the feedback?

[Fee Kindness]

Sorry for the delay!

Like Adam said I had the car out for the first time with the controller fitted on Sunday. I didn't have a huge amount of time to play around with it - 20 mins practice in the morning, took the car into the tyre wall in qualifying and then straight into the races.

I made a few adjustments during the practice session - I have been having major problems controlling the back end coming out of the hairpin at Knockhill so that was the main corner I concentrated on. Turning up the 4WD definitely showed an improvement with the traction out of the corner, if I got my lines right. If I took it too tight then the rear end would still step out a bit. The one thing I did notice was that even when turning up the 4WD it didn't overly cause understeer into the corner - this is what I found difficult with the TSC controller, if you tried to turn it up to correct oversteer or corner exit it would cause more understeer on corner entry.

I only used the controller on Auto mode on Sunday...so there is still a lot of playing around to do with it. I'll hopefully get out again soon to try it out some more.

[infamous_t]

A few people have brought up stability under hard braking as a reason to go the replacement G-sensors instead of the ETS-Pro.

How did you feel it rated in this respect, better/worse/same?

[Fee Kindness]

I did have the back end step out going into Duffus (after the pit straight) earlier in the morning....I think that was more from cold tyres and wet patches on the track though - I didnt notice it at all during the races