The STX thread!
03-02-2013, 10:11 PM
#2802
I am running in DSP too, I wrote a letter to the board about allowing the Mazdaspeed Kit and they turned it down :-( I am going to take my wing off but I am not changing the body kit, oh well. I really don't think my car is going to be competitive in class though I am just going to have fun and see what happens on the National Tour.
I saw you were signed up, I switch out the MS bumper for the OEM one for all the National Tour's, and I took the side skirts off last year solely for the Championships. I know that personally I won't care if you leave yours on, and others in the class shouldn't either, seeing as a front splitter is allowed in DSP.
03-03-2013, 03:00 AM
#2803
it was obvious me telling you that removing 40 lbs isn't going to transform the car into either being amazing or ill handling won't have anywhere near the impact of you eventually coming to this realization through your own firsthand experience
People who rely on theory generally tend to over emphasize the inevitable reality of the situation
My RX8 with full interior is just a tick off of 2700lbs/1228kg
we're allowed to use racing seats, but there is a minimum weight limit of 25#/seat for non-OEM including the mounting hardware and the passenger or rear seats otherwise can't be removed
it's fully emission-compliant (current STX class rule requirement), most items are custom to achieve minimum weight such as the intake, the exhaust system, aluminum racing coilovers with 2.25" ID springs and aluminum shock mounts, relocation of a lithium battery (went with one having suitable reserve power, not minimum weight), lightweight wheels, lighter brake package etc otherwise most everything else is a base factory 6-spd RX-8 with an empty glovebox and tool kit
if the rules allow it, you intend to put a roll cage in and not street drive it, or it's a dedicated autox car where the likelihood of hitting anything head-on is minimal then getting rid of the front crash bar is one of the best things you can do, that's 15# hanging way out on the top of the front nose
if you can figure out how to make a lightweight PPF that is still stiff enough that would have some potential savings, but again most of it is aft of the CG
most of this stuff is from the S1, if anything the S2 weighs more
https://www.rx8club.com/tech-garage-...8-parts-81791/
.
People who rely on theory generally tend to over emphasize the inevitable reality of the situation
My RX8 with full interior is just a tick off of 2700lbs/1228kg
we're allowed to use racing seats, but there is a minimum weight limit of 25#/seat for non-OEM including the mounting hardware and the passenger or rear seats otherwise can't be removed
it's fully emission-compliant (current STX class rule requirement), most items are custom to achieve minimum weight such as the intake, the exhaust system, aluminum racing coilovers with 2.25" ID springs and aluminum shock mounts, relocation of a lithium battery (went with one having suitable reserve power, not minimum weight), lightweight wheels, lighter brake package etc otherwise most everything else is a base factory 6-spd RX-8 with an empty glovebox and tool kit
if the rules allow it, you intend to put a roll cage in and not street drive it, or it's a dedicated autox car where the likelihood of hitting anything head-on is minimal then getting rid of the front crash bar is one of the best things you can do, that's 15# hanging way out on the top of the front nose
if you can figure out how to make a lightweight PPF that is still stiff enough that would have some potential savings, but again most of it is aft of the CG
most of this stuff is from the S1, if anything the S2 weighs more
https://www.rx8club.com/tech-garage-...8-parts-81791/
.
But the first thing that's why asked i wonder is the rear handling and response of the car. I didn't race all time but i tune my car like a race car i have a headers, straight pipe and single greddy ti-c my exhaust set up is really loud and i like it. I want to be fast on the straights and remove what i don't need on the car.
There lots of things to get weight reduction i knew but need money to change wheels, suspensions etc.
But weight reduction is free and want to remove my a/c it takes 8 kg i think and need alternator pulley or oem pulleys enough for removing ?
And the other tunings near future is bumper reinforcements will change with pipe shape..
That's all now R3's are really heavy, my cars licence wrote 1370 kg with driver car's weight is this true or ? There are lots of information pollution.
Thanks for the answers.
03-03-2013, 03:34 AM
#2804
You're not tuning it like a race car, that's a false assumption.
If you really did so you would have already purchased a set of quantum, nitron, moton or ohlins coilovers while keeping the stock exhaust system.
Building a race car is completely different than installing some bolt ons that only make the car louder.
In the case of the engine... in a race car you build and blueprint the engine first, do a lot of datalogging and start from there, based on what the data says you need (and not what you think you need). Same goes for the suspension, brakes etc.
Don't even get me started on seamwelding the whole chassis to make it stiffer and the whole roll cage anchoring points... there's a huge difference between bolting\welding the cage to the floor and drilling the firewall to weld it on the struts.
As we have all already said, removing the seats makes the car lighter. Will you notice it? no.
Will it upset handling? buy a datalogger and find out... but first learn to drive!
You can't expect to go to the track once, maybe twice a year and be able to drive. Driving requires training like any sport. There's some theory and a lot of practice. Heading out without an instructor means doing a lot of mistakes that you'll carry over with you forever.
To be able to properly tune a car you have to be an almost flawless driver (which is impossible) that knows how to read datalogs.
Experience helps, having different drivers drive the same car and write down their opinions without talking to each other helps as well... at that point you can take their common points and focus on them.
I know my rx8 molecule by molecule but i have friends, real race drivers, who are consistantly faster than me (.8secs on a 2min lap...). That's why I ask for their opinions most of the time.
If you really did so you would have already purchased a set of quantum, nitron, moton or ohlins coilovers while keeping the stock exhaust system.
Building a race car is completely different than installing some bolt ons that only make the car louder.
In the case of the engine... in a race car you build and blueprint the engine first, do a lot of datalogging and start from there, based on what the data says you need (and not what you think you need). Same goes for the suspension, brakes etc.
Don't even get me started on seamwelding the whole chassis to make it stiffer and the whole roll cage anchoring points... there's a huge difference between bolting\welding the cage to the floor and drilling the firewall to weld it on the struts.
As we have all already said, removing the seats makes the car lighter. Will you notice it? no.
Will it upset handling? buy a datalogger and find out... but first learn to drive!
You can't expect to go to the track once, maybe twice a year and be able to drive. Driving requires training like any sport. There's some theory and a lot of practice. Heading out without an instructor means doing a lot of mistakes that you'll carry over with you forever.
To be able to properly tune a car you have to be an almost flawless driver (which is impossible) that knows how to read datalogs.
Experience helps, having different drivers drive the same car and write down their opinions without talking to each other helps as well... at that point you can take their common points and focus on them.
I know my rx8 molecule by molecule but i have friends, real race drivers, who are consistantly faster than me (.8secs on a 2min lap...). That's why I ask for their opinions most of the time.
03-03-2013, 04:46 AM
#2805
@Giorgio you knew what i am saying but you explain everything detail by detail..
Building a race car is really different yes. But in a daily drive ability after these mods car turns more aggressive than stock one. If you tune a car like soft tune or hard tune this determine what it is.
Building a race car is really different yes. But in a daily drive ability after these mods car turns more aggressive than stock one. If you tune a car like soft tune or hard tune this determine what it is.
Last edited by thunderberk; 03-03-2013 at 04:51 AM.
03-03-2013, 04:52 AM
#2806
We have all done what we had to do to build our cars and gathered data, experience and impressions while doing so.
It may look like we act as "professors", the reality is that after you deal with a problem so many times and find solutions it just becomes natural to distinguish what will work from what won't.
It may look like we act as "professors", the reality is that after you deal with a problem so many times and find solutions it just becomes natural to distinguish what will work from what won't.
03-03-2013, 05:12 AM
#2807
We have all done what we had to do to build our cars and gathered data, experience and impressions while doing so.
It may look like we act as "professors", the reality is that after you deal with a problem so many times and find solutions it just becomes natural to distinguish what will work from what won't.
It may look like we act as "professors", the reality is that after you deal with a problem so many times and find solutions it just becomes natural to distinguish what will work from what won't.
Thanks for solutions but i need experienced ones
Last edited by thunderberk; 03-03-2013 at 05:18 AM.
03-03-2013, 05:21 AM
#2808
The problem is that all our solutions come from our direct experiences, which you appearently don't always like.
Btw since msn is shutting down i'm only using skype now.
Btw since msn is shutting down i'm only using skype now.
03-03-2013, 05:37 AM
#2809
If you don't do weight reduction properly cars tyres not hold verywell and rwd cars the back of the car not hold well as i said i have a single exhaust but the answers always consumes lots of things but quoting which you like race car or not ? I talked many tuners they race with oem engines not porting ones and they have only intake or exhaust set ups to be a race car not needs many things if your set ups different from oem ones and you improve car day by day or race by race you are tuner and your car is a race car.
Don't understand me wrong.
I knew msn is shutting down i have skype too and googletalk..
03-03-2013, 05:48 AM
#2810
Weight is a limiting factor when cornering. The more weight you have the less speed you can carry into a corner before the tyres lose traction.
This pdf explains everything: http://www.engr.colostate.edu/pts/Jo...20Modeling.pdf
Most teams run with stock engines because the rules say you can't modify the internals.
This pdf explains everything: http://www.engr.colostate.edu/pts/Jo...20Modeling.pdf
Most teams run with stock engines because the rules say you can't modify the internals.
03-03-2013, 07:24 AM
#2811
nobody understands you wrong except for your insistence to have this off-subject discussion in a thread that's dedicated to STX class competition with the SCCA
you can just as easily start your own dedicated thread where you tell people who have way more practical experience than yourself that they don't know what they're talking about
you can just as easily start your own dedicated thread where you tell people who have way more practical experience than yourself that they don't know what they're talking about
03-03-2013, 11:29 AM
#2812
nobody understands you wrong except for your insistence to have this off-subject discussion in a thread that's dedicated to STX class competition with the SCCA
you can just as easily start your own dedicated thread where you tell people who have way more practical experience than yourself that they don't know what they're talking about
you can just as easily start your own dedicated thread where you tell people who have way more practical experience than yourself that they don't know what they're talking about
03-05-2013, 07:59 PM
#2817
Yeah... I still don't have any 17's, so that was my only option. I'm not very happy with the resulting gearing, but it is what it is. 
I went with the same size for the Michelins, since I like the taller O.D. for a dual-duty street / rain tire.
Does anyone know if the PSS like to be scrubbed in?
I went with the same size for the Michelins, since I like the taller O.D. for a dual-duty street / rain tire.
Does anyone know if the PSS like to be scrubbed in?
Last edited by BRODA; 03-05-2013 at 08:09 PM.
03-15-2013, 10:21 PM
#2824
Close copy, but off slightly. I'l be building a new improved ZeroOverlap V2 model soon.
Still slogging away trying to get mine back together. Theres a local event at College Station on Sunday, but not sure if I can get done and down there. Otherwise I may just have to wing the Tour event untested.
Good luck to everyone in Dixie this weekend.
.
Still slogging away trying to get mine back together. Theres a local event at College Station on Sunday, but not sure if I can get done and down there. Otherwise I may just have to wing the Tour event untested.
Good luck to everyone in Dixie this weekend.
.
03-16-2013, 12:02 AM
#2825
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Drove the car back to my house tonight with the header installed. Nothing blew up and no leaks reared up, so a good first 50 mile test.
Mark not sure if your interested, but i built a pretty good Solidworks model of the stock header/our knock off with changes of your original merge header. Lets just say things didn't turn out exactly as I had planned. My welder is not "quite as careful" as I expected him to be. At the end of the day it is 7lbs lighter than stock and easily 10 more HP
..... Yea right. Sounds good though and with the Koolmat heat shield, it sure looks the part. Plus the super fancy V-Band Dave talked me into buying is cool.
See some of you in a few weeks at Jersey Pro, Victoracers and all!
Jeff
78 STX NER
Mark not sure if your interested, but i built a pretty good Solidworks model of the stock header/our knock off with changes of your original merge header. Lets just say things didn't turn out exactly as I had planned. My welder is not "quite as careful" as I expected him to be. At the end of the day it is 7lbs lighter than stock and easily 10 more HP
..... Yea right. Sounds good though and with the Koolmat heat shield, it sure looks the part. Plus the super fancy V-Band Dave talked me into buying is cool.See some of you in a few weeks at Jersey Pro, Victoracers and all!
Jeff
78 STX NER