[Z06] C5 Z06 and the Mojave and Magnum Mile
02-12-2016, 07:39 PM
#41
Mind sending some pictures? nskyline34@hormail.com
What do you think about my side skirt idea?
02-14-2016, 10:57 AM
#42
Drifting
That's not a bad thought... I was just thinking about a heat shield I made that was curved, made of .055" stainless and about a 5" lever arm from the mounting holes and it was pretty rigid. That was stainless not aluminum tho. I'll have to do math on the static pressure at 200.
Mind sending some pictures? nskyline34@hormail.com
What do you think about my side skirt idea?
Mind sending some pictures? nskyline34@hormail.com
What do you think about my side skirt idea?
Mark
02-17-2016, 03:04 PM
#44
Drifting
From a peace that I had left over it measures out at 2mm. Between the bend and top plate it was very stiff. Just so you know, the peaces that I made (or had made) matched the rubber end fixtures with solid locking tabs on the center deflector.
Mark
Mark
02-17-2016, 03:13 PM
#45
Did you make the car a flat belly or a diffuser or anything?
Curious about any good reading about this stuff
03-02-2016, 11:56 AM
#47
Update:
Car is just about done with tuning - max power was 487 at about 6900-7000. Graph was still climbing a little so this coming winter I will pull everything and do a forged rotating assy for 7400-7500 rpm to get the last bit out of it and break 500whp and make it a lot more reliable.
Next on the agenda is the aero pkg for the car. going to make a sheet metal air dam in front of the OE plastic one that extends down about 1/2" off the ground. Also going to make a 'semi diffuser'. basically close off the area behind the diff and before the rear valence. That thing acts like a giant air brake.
After the April race the car will likely get a flat bottom aero kit - also getting another stock hood to cut up and play with to remove some of the pressure under it. But again - all that will be after the April race.
Car is just about done with tuning - max power was 487 at about 6900-7000. Graph was still climbing a little so this coming winter I will pull everything and do a forged rotating assy for 7400-7500 rpm to get the last bit out of it and break 500whp and make it a lot more reliable.
Next on the agenda is the aero pkg for the car. going to make a sheet metal air dam in front of the OE plastic one that extends down about 1/2" off the ground. Also going to make a 'semi diffuser'. basically close off the area behind the diff and before the rear valence. That thing acts like a giant air brake.
After the April race the car will likely get a flat bottom aero kit - also getting another stock hood to cut up and play with to remove some of the pressure under it. But again - all that will be after the April race.
03-02-2016, 11:37 PM
#48
Drifting
Mark
03-10-2016, 01:35 PM
#49
Sorry for the long delay, I didn't do anything to the bottom of the car, the thickness was to stop any flex at speed. I also tried raising the back of the hood to reduce pressure, but that did produce any real improvement in speed or stability. The guys that were running faster then 150 class suggested and do add weight at floor level. Lower center of gravity and improves traction (it's all salt flat magic).
Mark
Mark
So I'm now hunting for 200mph (201 actaully) lol
I'm curious what people have found the magic number to be for propelling the C5Z to that number? My goal is to get there with 500 by doing easy basic aero mods...
03-13-2016, 07:21 PM
#50
Drifting
Something to consider is tires, you may want to look into some funny car frontrunners, they are narrower and will reduce some drag and rolling resistance. And are related for speeds up to 300+mph.
Mark.
Mark.
03-14-2016, 11:03 AM
#51
Can you give me a high level run down on the effects of caster at speed please? (toe and camber arent quite as prominent correct?)
03-14-2016, 12:01 PM
#52
Drifting
I didn't really change my setting from my street setup. Rear -1 zero toe, front 1.25 1/16 toe in with as much caster as i could get., I would think that having the rears at near zero camber would put the tire flatter on the ground. Any toe (in or out) will have a drag effect but will also ad some stability. You'll have to decide for your driving comfort the set up that works best for you. Plus I believe that your are running on a paved surface.
Sorry if this is now much help.
Mark
Sorry if this is now much help.
Mark
03-14-2016, 01:13 PM
#53
I didn't really change my setting from my street setup. Rear -1 zero toe, front 1.25 1/16 toe in with as much caster as i could get., I would think that having the rears at near zero camber would put the tire flatter on the ground. Any toe (in or out) will have a drag effect but will also ad some stability. You'll have to decide for your driving comfort the set up that works best for you. Plus I believe that your are running on a paved surface.
Sorry if this is now much help.
Mark
Sorry if this is now much help.
Mark
You're correct - its an airforce runway IIRC
04-07-2016, 10:03 PM
#54
Anyone else headed down to the Mojave mile?? Curious if there will be any other C5 guys...
04-11-2016, 06:39 PM
#55
April 10, 2016 Mojave Mile
Car hauled the mail
174 in sanding mile - launched it like a grandma - shifted at about 4-5k and only went WOT in 4th and 5th
180 in the 1.5 "magnum" mile - launched like a GRANDMA (partly an oops lol) 1-2 shift at 4500, 2-3 shift - blew that shift 3x lol, 3rd went WOT, shift 6k, 4th - WOT, shift at 6k, 5th WOT, saw 187 (about 6800rpm) and realized my tech speed was 180, so I lifted and coasted through at 180.
Not bad for a stock aero and zero attention to setup and not shifting remotely quick or launching hard at all.
Going back in October for 200...
174 in sanding mile - launched it like a grandma - shifted at about 4-5k and only went WOT in 4th and 5th
180 in the 1.5 "magnum" mile - launched like a GRANDMA (partly an oops lol) 1-2 shift at 4500, 2-3 shift - blew that shift 3x lol, 3rd went WOT, shift 6k, 4th - WOT, shift at 6k, 5th WOT, saw 187 (about 6800rpm) and realized my tech speed was 180, so I lifted and coasted through at 180.
Not bad for a stock aero and zero attention to setup and not shifting remotely quick or launching hard at all.
Going back in October for 200...
04-12-2016, 05:47 PM
#56
Drifting
That Great... Keep us informed on any changes to the car, and how it goes in Oct.
Mark
Mark
04-13-2016, 12:07 AM
#57
Racer
Awesome numbers!
I wonder if anyone has ever broke 200 with m12 gearing. I wonder if it's possible to get enough tire (height wise) under the car to make it happen.
I wonder if anyone has ever broke 200 with m12 gearing. I wonder if it's possible to get enough tire (height wise) under the car to make it happen.
04-15-2016, 01:49 PM
#58
Was going to try and get to 500whp on motor, I'm really close at 487, but I dont want to spend the heaps of money for 14 more hp to get there for no REAL reason. I've proved plenty with getting to 487 how I did.
October will be aero mods, a little taller tire maybe, obvious safety equip, and then a little bit of spray if needed. (50hp shot will be plenty). I really think I can get there on motor if I can get aero to help a little, but it will be close. I dont want to drive another 50+ hours only to come up at 199.9mph - so I'll bring 4 bottles of drugs with me
04-15-2016, 02:09 PM
#59
Racer
Keep us posted along the way! I have a bit more power (expecting near four digits at the wheels) but kinda in the same boat in terms of goals. Wondering if thy 200mark can be reached with the m12
What size tire are you planning on running with your m12 trans?
What size tire are you planning on running with your m12 trans?
04-15-2016, 02:39 PM
#60
I'm not sure yet - its really going to come down to how comfortable I feel turning the motor. Right now it has 305/35-18's on it which math says 200mph at about 7400 rpm (IIRC). Now this is going to maximize acceleration, so if I go to a taller tire I will turn fewer R's, but will not get there as fast. Also that's a LOT of RPM for a Stock LS oil pump - lots of cavitation = no oiling.
Likely I will be going with this same tire set and make a pass at 7000-7100 and see how I feel about it, if I think I can get there on RPM I might go to 7200-7300 - but this is really unlikely as i will be banking on centrifugal forces and tire growth. lol
Most likely I will swap rear wheels/tires for something like a 295/40-18 in the NT05 (about 0.7" taller) so it would be like running a 3.30 rear gear rather than the OE 3.42's. This would mean to hit 200 I would need just a tad over 7000rpm - which has been proven a LOT on a OE bottom end without rod bolts. I really think this is the winning ticket though, tires will grow a tiny bit and should allow for 201-202 at 7000 or so. (Tires definitely grew on the runs - you can see it in the contact patch/wear path.
Mind you I'm not trying to hit 200 in the mile, I'm aiming for the 1.5 mile. Just a bucket list thing - 200mph before i'm 25, then 300 before i'm 40 < that will be on the salt though.
Trying to use this car to prove that for a REASONABLE BUDGET you can have: 500whp, bitching track car, go 200, and hang with a C6Z or maybe a C7Z around a track. So far I'm on track - proved the 500whp is easy (I'm 13hp shy and left a LOT on the table) and I know 200mph is very do-able safely now, and now I'm working on the aero pkg/brakes to help the track side of things to keep up with a C7Z. Luckily a close friend has one so I can go drive it and drive mine and see where I need to improve things!
Math says that we should only need a little under 400hp to push through the air at 200mph - but this is assuming infinite run upto 200, so I need to look into the data logging I have/did and project out how quickly I will accelerate and see about how long/distance it will take to get to 200mph. Like I said, I really think the car has the stones to do it on motor, if I get close (like 198) I will likely NOT spray it, go home and spend the money to do it on motor to really set the bar for people. Oct is a long ways away and I have a mountain of work to do between now and then on the car
Likely I will be going with this same tire set and make a pass at 7000-7100 and see how I feel about it, if I think I can get there on RPM I might go to 7200-7300 - but this is really unlikely as i will be banking on centrifugal forces and tire growth. lol
Most likely I will swap rear wheels/tires for something like a 295/40-18 in the NT05 (about 0.7" taller) so it would be like running a 3.30 rear gear rather than the OE 3.42's. This would mean to hit 200 I would need just a tad over 7000rpm - which has been proven a LOT on a OE bottom end without rod bolts. I really think this is the winning ticket though, tires will grow a tiny bit and should allow for 201-202 at 7000 or so. (Tires definitely grew on the runs - you can see it in the contact patch/wear path.
Mind you I'm not trying to hit 200 in the mile, I'm aiming for the 1.5 mile. Just a bucket list thing - 200mph before i'm 25, then 300 before i'm 40 < that will be on the salt though.
Trying to use this car to prove that for a REASONABLE BUDGET you can have: 500whp, bitching track car, go 200, and hang with a C6Z or maybe a C7Z around a track. So far I'm on track - proved the 500whp is easy (I'm 13hp shy and left a LOT on the table) and I know 200mph is very do-able safely now, and now I'm working on the aero pkg/brakes to help the track side of things to keep up with a C7Z. Luckily a close friend has one so I can go drive it and drive mine and see where I need to improve things!
Math says that we should only need a little under 400hp to push through the air at 200mph - but this is assuming infinite run upto 200, so I need to look into the data logging I have/did and project out how quickly I will accelerate and see about how long/distance it will take to get to 200mph. Like I said, I really think the car has the stones to do it on motor, if I get close (like 198) I will likely NOT spray it, go home and spend the money to do it on motor to really set the bar for people. Oct is a long ways away and I have a mountain of work to do between now and then on the car
Last edited by nskyline34; 04-15-2016 at 02:46 PM.