Jackass w/ LS9: original build and new Jackass 2.0 updates!

[hersheys69z]

Hi Mark
I'm thinking of buying a new 2015 Z/28 and was just wondering if you guys have something better coming down the pipe next year that would make me regret it?

[Stielow]

Originally Posted by hersheys69z

Hi Mark
I'm thinking of buying a new 2015 Z/28 and was just wondering if you guys have something better coming down the pipe next year that would make me regret it?

We always have something better......

Is the iphone 6 better that the iphone 5...? Depends on what you like or need.

The 2015 Z/28 is a very low production one off car. It is special. It is a pure drivers car. I feel the cars coming in the future will not be as true of a driver's car as the 14/15 Z/28. Will the future have faster cars...maybe. Will they be as raw and fun to drive as a Z/28. That is for the public to tell us. I can say the 2014/15 Z/28 is an iconic car and will have a place in the automotive history books.

On a side note with the goverment required fuel economy ratings coming these type of cars are going to be a lot more expensive in the future. We have to sell a lot of high fuel econmony cars to balance out the high performance cars.

Mark

[waynieZ]

I love to hear ( read ) the passion when you talk about these cars. That's why your builds are so amazing. Keep Chevy on the cutting edge!

[LXSS350]

Mark I use the Walbro 460 E85 pumps with the Fore FC3 Triple Pump Staged Controller. Even though I am staging the pumps the biggest issue is the big amperage draw as pressure demand increases. On the Walbro's at say 6bar a pump is pulling 19amps or it pulls just over 15amps at 3bar.

Although my system runs well with the multiple Walbros I just came across the Asnu FP580X (E85) pump. By comparison it is only pulling 12.5amps at 6bar and 7.7amps at 3bar.

[CarlC]

Originally Posted by LXSS350

Mark I use the Walbro 460 E85 pumps with the Fore FC3 Triple Pump Staged Controller. Even though I am staging the pumps the biggest issue is the big amperage draw as pressure demand increases. On the Walbro's at say 6bar a pump is pulling 19amps or it pulls just over 15amps at 3bar.

Although my system runs well with the multiple Walbros I just came across the Asnu FP580X (E85) pump. By comparison it is only pulling 12.5amps at 6bar and 7.7amps at 3bar.

Nice pump, but it may be difficult to find a replacement. The Walbro's are everywhere.

VaporWorx can PWM the Walbro 450's as well, dual and triple setups. That limits the power to the pumps to only what's needed, so if the engine does not need all that fuel, the controller will throttle the power to the pumps to only what's needed.

[Stielow]

We had a good test day at Waterford Raceway. It was a bit cold but we still got to run 3 15 minute sessions. We finally have enough fuel flow. Now we are refining the system.

The event Sunday was the Shelby Club. Great group to run with. The advance group is one of the best groups I have ever ran with. I would like to go to a few more of their events next year.



Now that I know it will stay together we are taking it to Gingerman this Sunday for the true test.

On our test at Waterford the car is working great. I know it was a cool day but on a 60 degree day the water was 180 F and the oil got up to 195 F after 15 minutes. All the systems on the car work great.

Off the data trace the car is cornering at 1.15 G and braking at 1.3 G so once I get the chassis dialed in we should be doing better.

Mark

[syborg tt]

Morning Mark,

This is more of a curiosity question. How long do your tires last when you are tracking them ?

[RussMurco]

Originally Posted by Stielow

I think I have my new computer wallpaper!

Originally Posted by Stielow

I tested some Michelin Super Sports and tore chunks out of them.

I guess my boss has never pushed his Ferrari 599 anywhere near the limits when he goes to the Elkhart Lake Ferrari every summer. That car is roughly 3700lbs with 600+ horsepower so I'm wondering if it would chunk the tires at 9 or 10/10ths too.

Originally Posted by Stielow

A 2014 Z/28 can wear out a set of tires in 80 minutes of track time going flat out. (Two tank fulls of fuel) A new Z06 will wear out the tires in 30 minutes and they are the best on the first two laps. (One tank full of fuel).

Do you think the Rival S tires would improve those numbers, Mark?

Originally Posted by Stielow

If you want to play you are going to need to pay....
Mark

Indeed!!!

Originally Posted by Stielow

Off the data trace the car is cornering at 1.15 G and braking at 1.3 G so once I get the chassis dialed in we should be doing better.

This makes me wonder, what kind of numbers did Hellfire generate once it was dialed-in?

[hersheys69z]

Originally Posted by Stielow

We always have something better......

Is the iphone 6 better that the iphone 5...? Depends on what you like or need.

The 2015 Z/28 is a very low production one off car. It is special. It is a pure drivers car. I feel the cars coming in the future will not be as true of a driver's car as the 14/15 Z/28. Will the future have faster cars...maybe. Will they be as raw and fun to drive as a Z/28. That is for the public to tell us. I can say the 2014/15 Z/28 is an iconic car and will have a place in the automotive history books.

On a side note with the goverment required fuel economy ratings coming these type of cars are going to be a lot more expensive in the future. We have to sell a lot of high fuel econmony cars to balance out the high performance cars.

Mark

Thank you for your insight.
Do you feel the Z/28 is a better track car than a used Zr1 corvette?
Also for race track performance is there a advantage to getting a Z/28 with no air conditioning?
I was leaning towards not getting ac because of weight and possible hp loss but curious to know what the real answer is.
Thanks for your advice. Means a lot coming from the man behind the Z/28

[Stielow]

Originally Posted by hersheys69z

Thank you for your insight.
Do you feel the Z/28 is a better track car than a used Zr1 corvette?
Also for race track performance is there a advantage to getting a Z/28 with no air conditioning?
I was leaning towards not getting ac because of weight and possible hp loss but curious to know what the real answer is.
Thanks for your advice. Means a lot coming from the man behind the Z/28

The best bang for your buck right now is a used C-6 Z06 with Carbon Brakes for a track car. You can also pick up a used ZR-1 for less than a Z/28. Which one is "better", if you want to be real fast get the ZR-1 if you want to just do lapping days and have fun the Z06 or Z/28 are better track cars.

If you want a new car our best track car value is a 1LE Camaro. Great cars very durable.

On the A/C question, if you are only going to track a Z and you want the rarest one get no A/C. If you ever want to drive it on the street get A/C and the other 5 speakers. It makes a much nicer car.

Mark