When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
[Z06] I am going to take advantage and do some upgrades while my TR6060 is being rebuilt
C6 Corvette ZR1 & Z06General info about GM’s Corvette Supercar, LS9 Corvette Technical Info, Performance Upgrades, Suspension Setup for Street or Track
I am dying to get my car back. I hate not being able to drive it when the weather is good. Unfortunately, it is going to be at least 2 weeks and probably 3.
Got my ARH 2" headers and mid pipes back from Calico. They are local to me and have a fantastic facility. Most of their work appeared to be for industrial applications. I saw a lot of huge pistons and some bearings that would have fit a crankshaft 12" or more in diameter. Luckily they take care of a lot of race teams and local customers like myself and I am very happy with how they look. I am sure that they will hold up just as well.
I paid $400 for the headers and mid pipes, which is an inside and outside ceramic coating.
All of my transmission internals are getting REM polished and CRYO treated this week and I hope to have my transmission back late next week and hopefully get my car back together the following week.
Last edited by lamboworld; 05-30-2018 at 05:26 PM.
Just found out that I am getting my transmission back today and it is being delivered to my shop as I am writing this. In addition to the upgrades that I listed earlier in this thread, Tick Performance added bungs and sprayers to my transmission. Anyone have an opinion on whether I should use them and what other parts I would need.
Last edited by lamboworld; 06-11-2018 at 03:27 PM.
My car is finished and my numbers are a little low but I know why.
I have always dyno'd using street tires, but I never got around to switching my tires back because I broke my transmission during my last track event and had it towed to my tuner. My car had R888's on it when it dyno'd and it is about 20 to 30whp low because of them. I have two track events to go to over the next two weeks and I am going to take it back to the same dyno and run it again with street tires.
I found this article very interesting how small things like tires or how tight or loose the straps are can affect the dyno numbers. I realize that dyno's are just a tool but I like consistency and I want to really see how these tires impact the numbers. The testing done in this article shows that track tires will definitely impact the results. http://www.superchevy.com/how-to/add...el-horsepower/
Once I switch the tires I think that it should be around 590whp and 520wtq, but we will see.
If you had the tire pressure at something like 40psi+ then I could see it impacting results. But simply have a set of R888s on your car aired up to normal pressure should not have a 30whp impact. I dyno my car on NT01s pretty regularly and they sure don't produce a 30whp variation from MPSS.
If you had the tire pressure at something like 40psi+ then I could see it impacting results. But simply have a set of R888s on your car aired up to normal pressure should not have a 30whp impact. I dyno my car on NT01s pretty regularly and they sure don't produce a 30whp variation from MPSS.
Nice results though!
This cam should be around 585 to 590 based on the other cams that I have had in my car. In the link I provided they had results that was 2.39% lower because of this tire and the numbers actually go up with higher psi because of reduced roll resistance. I think that I will see an increase of at least this amount and should be between 585 - 590. The numbers really don't matter, but something is off compared to other dyno's and the only difference are the tires that I used during this dyno session. If the numbers don't change then I will be a little more concerned considering I increased my cam overlap by 4 degrees and also added 2" headers.
Last edited by lamboworld; 06-22-2018 at 10:03 PM.
This cam should be around 585 to 590 based on the other cams that I have had in my car. In the link I provided they had results that was 2.39% lower because of this tire and the numbers actually go up with higher psi because of reduced roll resistance. I think that I will see an increase of at least this amount and should be between 585 - 590. The numbers really don't matter, but something is off compared to other dyno's and the only difference are the tires that I used during this dyno session. If the numbers don't change then I will be a little more concerned considering I increased my cam overlap by 4 degrees and also added 2" headers.
No. That is not correct. They raised the tire pressure using the same tire and saw a loss of 2.39%. So it was the pressure change that caused the loss.
No. That is not correct. They raised the tire pressure using the same tire and saw a loss of 2.39%. So it was the pressure change that caused the loss.
It doesn't really matter but read the other paragraph:
Increased Tire Pressure
Chassis dyno testing obviously measures an engine's horsepower and torque, but it also measures friction and drivetrain loss, since the engine has to turn everything in the drivetrain, plus the wheels and tires and, finally, the dyno rollers in order to obtain the dyno data. As such, any changes to resistance or friction during a test should affect the results, just as they would affect e.t.'s on the track or speed on the street. An easy way for a dyno operator to change resistance would be to increase tire pressure, which should decrease rolling resistance and sidewall deformation, resulting in higher horsepower numbers.
The numbers were down because of the tire and not because they increased pressure. They expected to see higher numbers and they were lower.
Last edited by lamboworld; 06-22-2018 at 10:15 PM.
It doesn't really matter but read the other paragraph:
Increased Tire Pressure
Chassis dyno testing obviously measures an engine's horsepower and torque, but it also measures friction and drivetrain loss, since the engine has to turn everything in the drivetrain, plus the wheels and tires and, finally, the dyno rollers in order to obtain the dyno data. As such, any changes to resistance or friction during a test should affect the results, just as they would affect e.t.'s on the track or speed on the street. An easy way for a dyno operator to change resistance would be to increase tire pressure, which should decrease rolling resistance and sidewall deformation, resulting in higher horsepower numbers.
Their loss of horsepower was due to a CHANGE IN TIRE PRESSURE. Which is not what you said and not the reason you gave. But hey man, use whatever reason you want. I was just pointing out your error.
"with our 18-inch Toyo R888 R-compound tires aired up to 41-psi from 29, we saw a loss of 9.72-rwhp (2.39-percent)"
Glad you got the car running again man! That REM polishing that RPM does is nice! It's a shame all of shine that gets hidden in the tranny.
Yes, I am ready to get back in this car. I should get it back on Monday and I am going to leave it alone and not do anything else for a while. It is time to drive and enjoy.
I ended up going with Tick Performance to rebuild my transmission because they are local to me. I did go with their REM polishing and Cryo treatment.
My car is finished and my numbers are a little low but I know why.
I have always dyno'd using street tires, but I never got around to switching my tires back because I broke my transmission during my last track event and had it towed to my tuner. My car had R888's on it when it dyno'd and it is about 20 to 30whp low because of them. I have two track events to go to over the next two weeks and I am going to take it back to the same dyno and run it again with street tires.
I have R888rs and my car dyno'd the same as it did with Pilot Sports, NT05Rs lowered it by 20 whp or so though
Last edited by Millenium Z06; 06-23-2018 at 08:50 AM.
I have R888rs and my car dyno'd the same as it did with Pilot Sports, NT05Rs lowered it by 20 whp or so though
I am going to put my street tires back on my car before I pick it up tomorrow and have my tuner make two pulls on the dyno to see if my theory is right or wrong. We will see.
05-30-2018, 05:22 PM
