SCCA STR 370z Progress Thread.... It can be done!

[MIKE_STR]

Originally Posted by AK370Z

MIke STR: How do you cope with tire pressure increase? You simple check before event and run all day? I run 37F, 38R and sometimes I find myself running at 45-46 psi hot! Do you go out and check pressure/adjust before each run?

Yeah. I have a friend that will check my pressure while I'm in line. Front pressure builds so much faster than back.. but that's where all the weight is.

The car seemed to do the best with 37 front / 35 rear psi.

[AK370Z]

Originally Posted by MIKE_STR

LOL! Yes. Windows movie maker... I'm cheap.

Mike, do this. Takes 3s but it'll remove the ugly black strip around your video. (i'm assuming you're recording wide screen)

Originally Posted by Apollo8642

I have an 2009 Nismo, and you can find all my last year autoX runs at https://www.youtube.com/user/Apollo240sx In the SSCC autoX videos I don't think I ever ran less then a half tank on their track. I figure the sweeper might do the trick, but still have never had a problem there regarding fuel.

Just to be clear my car has been fuel starved on the track, but never auto crossing. For the Oregon SCCA Solo we usually only get five runs, and they are pretty small, usually always sub one minute. As for the national events up at Packwood Wa they are one minute and up. I've never burn threw a huge amount of fuel where I've been worried.

There are now two other 370Z's running in the scca autox group with me, so I'll have to ask them what they are doing.

Interesting man. Maybe you have a special edition Z

Originally Posted by MIKE_STR

Yeah. I have a friend that will check my pressure while I'm in line. Front pressure builds so much faster than back.. but that's where all the weight is.

The car seemed to do the best with 37 front / 35 rear psi.

Thank you. I have a BMWCCA Autox event coming up on 4/27. I'll try it out.

[Apollo8642]

Originally Posted by AK370Z

Interesting man. Maybe you have a special edition Z

Yup, it still gets fuel starvation issues on the track, so it can't be that special, I wish it was though, cause that would be cool.

[MIKE_STR]

Originally Posted by Apollo8642

Yup, it still gets fuel starvation issues on the track, so it can't be that special, I wish it was though, cause that would be cool.

No offense.. but you just aren't generating enough G force, driving hard enough, or trail braking into large sweepers while AutoXing. I never ran into it until I tweaked my suspension and added some camber. Once I got the car to actually generate a lateral G.... it would fuel stave like crazy.

At a test n tune this spring I decided to **** around with the car at 1/3 tank... I literally thought I broke the car. It fuel starved for a good 40 seconds. I was dumbfounded.

Fuel starve is only momentary at autoX if you have 3/4 tank. Maybe a second (feels like an eternity). I'd rather run a full tank and take the weight penalty than run into fuel starve again.

[Apollo8642]

Originally Posted by MIKE_STR

No offense.. but you just aren't generating enough G force, driving hard enough, or trail braking into large sweepers while AutoXing. I never ran into it until I tweaked my suspension and added some camber. Once I got the car to actually generate a lateral G.... it would fuel stave like crazy.

At a test n tune this spring I decided to **** around with the car at 1/3 tank... I literally thought I broke the car. It fuel starved for a good 40 seconds. I was dumbfounded.

Fuel starve is only momentary at autoX if you have 3/4 tank. Maybe a second (feels like an eternity). I'd rather run a full tank and take the weight penalty than run into fuel starve again.

No offence but you really can't talk sh!t when neither of us have a proper data logger, and G meter so see if that's true, or not. I would really like to compare note on that if we did.

Originally Posted by synolimit

I think any spring no matter what needs preload set on the spring. If I do preload it the rear will be pretty much OEM height back there. I don't want to look like a funny car.

synolimit WTF are you talking about now? That makes absolutely no sense when it comes to how the suspesion works on these cars.

[MIKE_STR]

Originally Posted by Apollo8642

No offence but you really can't talk sh!t when neither of us have a proper data logger, and G meter so see if that's true, or not. I would really like to compare note on that if we did.

Look, it's a factual statement. Maybe you haven't encountered the right course on the right surface. I have no idea. Bottom line, your car is not generating the same g force in certain elements that mine is (assuming same surface and similar elements). There is no magic 370z that doesn't get fuel starve.

Once again, you could be on asphalt all the time. I don't know. You might never have fast right hand sweepers.. I don't know...

[Apollo8642]

Originally Posted by MIKE_STR

Look, it's a factual statement. Maybe you haven't encountered the right course on the right surface. I have no idea. Bottom line, your car is not generating the same g force in certain elements that mine is (assuming same surface and similar elements). There is no magic 370z that doesn't get fuel starve.

Once again, you could be on asphalt all the time. I don't know. You might never have fast right hand sweepers.. I don't know...

I never said I have some magic Z, or did I say I never had this issue, just never had it happen during autocross. You should go back, and read my posts.

Assume way, I'm 12 hours away from you. Come up to the SCCA National Tour in Packwood Wa. and you can drive my Nismo sense you're such a bada$$, and sense your seem to know my car's setup, and hell everything else.

Seriously though, it's an open invite. If you make it over this way I will be more then happy to let you drive, and maybe there is something both of us can learn in the process. That's happening July 5-6 in Packwood, WA at the former Hampton Mills Lumber Plant. PM me if you're interested.

[synolimit]

Originally Posted by Apollo8642

synolimit WTF are you talking about now? That makes absolutely no sense when it comes to how the suspesion works on these cars.

Dude Jesus Christ, go away. If you can't read whats been said then don't say anything at all. Take your Jesus mobile that's better than all our since it can't fuel starve and go away.

[Apollo8642]

Originally Posted by synolimit

Dude Jesus Christ, go away. If you can't read whats been said then don't say anything at all. Take your Jesus mobile that's better than all our since it can't fuel starve and go away.

Wow I'm Jesus Christ now! Thanks buddy I didn't think you liked me that much. Your an idiot for saying that cause that's not what I've said.

I think any spring no matter what needs preload set on the spring. If I do preload it the rear will be pretty much OEM height back there. I don't want to look like a funny car.

If you adjust ride height to adjust preload your are also moving the center of gravity of your vehicle, which could also give you negative side effects, on the road, and track. I thought I read some place you were having a traction issue, maybe something like this could be the cause.

Preloading springs on a MLS is properly done using coilovers that are not only height adjustable but also allows you to adjust the spring perch independently.
Depending on your setup, and spring rates you may not preload all your suspension when corner balancing, and in some cases you might have to add helper springs for corners that have none at all.

Hopefully this is helpful to you, or anyone else that might be looking at this dribble you continue to spout.

Or if you would rather the words of the internet;
Spring Pre-Load - Compressing a spring in advance of adding a load. For example taking a spring with a 100 pound linear spring rate, preloaded one-quarter inch, would take twenty-five pounds of force before it would further compress. In effect not moving until 26 pounds of force were applied, and only moving one-quarter inch when 50 pounds of force were applied, as opposed to the half inch the spring would have normally moved. The spring rate however has not changed, as it would continue compressing one-quarter inch for every additional 25 pounds of force applied throughout the active length of the spring, until the coils touched each other (bound).

By the way synolimit do you have a youtube channel or video links of your driving on a track, or autocrossing?

Originally Posted by 03threefiftyz

I bet I could get your car to starve at your stated fuel level.....bring it to MD and let me give it a shot .

MD is a little to far for me, but if you came over here sure, and I'd let any competent person drive it.
My setup, and driving skill isn't perfect. There is always some more to learn, specially if someone is faster in my own car. I really find that exciting cause they can teach me something.
Warning if you break it you buy it.