Gainesville Road Race event 23MAY09.

[Cory]

I finally took the car out on the track today for some trials. I am very happy with how it performed. I'll post the data first. I apologize for the picture quality. Photo****et is the youtube of pictures complete with a gay user interface.

Red is speed, green is lateral, black is longitudinal.





Power oversteer was on demand today. I could not power out of corners like I wanted to. My HP+ pads faded in short order as well. Those will have to go before the next event. I also started out with slight oil starvation under lateral acceleration today, which was fixed with adding another quart of oil or so. I also noticed that oil pressure drops quickly as oil temps rise. I guess viscosity tapers off pretty quickly. Oil temps hit around 267*F with a tru cool oil cooler after four hard laps. I am going to need a larger oil cooler. Coolant temps never went past about 205* from what I saw. Boost was at 14psi, so I was making around 350whp. A 360whp SRT-4 ACR on Direzzas was hitting 57.9 today. So I felt like I did pretty well for not being on that track in well over a year (over a year and a half with the 240). The T04R killed me for lag. I think with a quicker spooling turbo, the car has 56's in it. With more track time, I may even be able to get into the 56's on this turbo.

[Frankist]

how do you read those graphs? and how would you as a driver benefit from this type of acquisition. it looks interesting.

[2Fass240us]

What brake setup are you running?

[Cory]

300zx F&R w/ 1" MBC. Hawk HP+ all around.

I have Cobalt Friction XR3's waiting to be installed in the garage for tomorrow's track event.

[sr20goofus]

XR3 front and rear?

[Cory]

Yea, I decided on them for both front and rear.

[veilside180sx]

Time for some sticky rubber.=)

[Def]

How big is your cooler? You'd probably be fine if you just ducted the inlet and outlet. If it's in front of your radiator, then that's your problem. Air builds up in front of the radiator which kills the pressure differential across the oil cooler core.

[Cory]

I totally agree, but I don't have a lot of options... Right now, my brake ducting takes up the inlets for the normal location. I did make a divider plate for the area between my intercooler and radiator that sections off the inlet to the radiator for my oil cooler.



It is also very open on the other side of my radiator, whilst most have a fan shroud in the area.

And then, I do have a small hood vent that I feel is pretty effective.


I'm thinking of moving to a much larger Setrab core in lieu of more aggressive tracks. I do plan on upgrading to a GT3076R in the very near future though. I think with a turbo that spools much sooner, I may not be at high RPM as much as I am now. I really have to be hard on the engine to be able to accelerate out of corners, whereas with the GT3076R, a lot of corners will be taken in the next gear. I actually have to drop down to first gear for a 25mph turn... So I think with lower RPM, that should also help with oil temps.

I also have an email sent off to Canton about building a custom oil pan with diamond trap doors. If I can do that, I should be able to drop the oil level slightly and still retain more oil and not starve. I also plan to do a crank scraper and windage tray, which should further keep temps down.

Lots of plans that are awaiting funding.

[Cory]

Time for some sticky rubber.=)

I can't complain about Direzzas. Though, I may try a set of NT-01s next. I'll be happy if I can get into the 56s on this track and have a car that is capable of doing a lot of laps continuously.

[Cory]

Well I just found out an interesting fact about Cobalt XR3's while browsing around for info on bedding the pads in (which is not required). Apparently they are only good for 1200*F. The site I ordered from advertises 1600*F. I am a little upset about that. I took for granted that the site simply copy/pasted the advertisement as most online dealers do, but it bit me in the ass. I still plan to test these pads, as the next best thing I have is HP+s. I'm hoping these will cut it for my little bull**** track days, but I will probably be ordering a set of XR2s sometime in the near future.

Cobalt's website

http://www.cobaltfriction.com/compounds/

The site I ordered from

http://rpgproduction.rpmware.com/cobalt_friction/cobalt_friction_brake_pads_xr3/crbxr3d647/i-150995.aspx

I guess I had my hindsight eyeglass prescription filled just a few days too late.

[sr20goofus]

when i told you the XR3's are a big upgrade from the HP+'s i wasnt lying. There is so much more you can learn from you brakes with the XR3's, no need to jump all the way up to XR2's yet. NASA racers you them and instructors because they have compressed their braking zones so much it necessary to have that compound and heat range.

Again i suggest learning more with what you have then banking on what is ideal for a cars setup.