DYNO set up?
Melting Slicks
Joined: Sep 2000
Posts: 3,150
Likes: 1
From: Carlsbad, CA CA
You can run 0 weight oil for a little more power, run VP 105 and add more timing. IF you have nitrous make sure you got a full bottle and run it over 1000psi.
Make sure you have the biggest fan you can find blowing right into your intake. If the dyno tech allows, you can keep a bag of ice on the intake the whole time you run.
Other than that just make sure your car is nice and cool.
Make sure you have the biggest fan you can find blowing right into your intake. If the dyno tech allows, you can keep a bag of ice on the intake the whole time you run.
Other than that just make sure your car is nice and cool.
Race Director
Joined: Aug 2003
Posts: 11,043
Likes: 3
From: San Jose Pat Tillman - American Hero
Originally Posted by Corvette Kid NC
That's cheating! 
Le Mans Master
Joined: Dec 2002
Posts: 5,270
Likes: 3
From: Seattle Area WA
I would say when its 70* believe 281rwhp and when its 107* believe its 265rwhp. 
I wouldn't doubt, not knowing all the other possibly different conditions, i.e. humidity, that it could vary that much in those different temps. Keep in mind, you probably ran a different number than 281 the run before that run so you also have to factor in the run-to-run differences that can happen as well.
I wouldn't doubt, not knowing all the other possibly different conditions, i.e. humidity, that it could vary that much in those different temps. Keep in mind, you probably ran a different number than 281 the run before that run so you also have to factor in the run-to-run differences that can happen as well.
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Drifting
Joined: May 2003
Posts: 1,730
Likes: 1
From: Charlotte NC
St. Jude Donor '05
I had a guy who was crazy about doing over 300rwhp. (mustang) so after we tuned it we still fell about 6hp short.
we aired up the tires to 40psi and put wet rags on the intake and the next pull did 305rwhp.
we aired up the tires to 40psi and put wet rags on the intake and the next pull did 305rwhp.
Team Owner
Joined: Sep 2001
Posts: 62,119
Likes: 1,725
From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
Originally Posted by Lichen
Well, I dynoed my car when the outside temp was 70*F and got 281RWHP. I went back to the same place when it was 107*F and got 265RWHP. Which am I to believe?
I would just set up the car for whatever conditions its actually driven in, 32-35psi tires and no special consideration for anything else, like bags of ice on the intake. A fan wouldnt be special consideration, since on the street you have air coming in anyway.
Otherwise, what good is this special stuff going to do you?
Preferably oil temps would be around 190-200ish, coolant as cool as possible.
Race Director
Joined: Oct 2001
Posts: 19,653
Likes: 428
From: Melbourne Florida
Cruise-In IV Veteran
It appears you have a reason for wanting to show the biggest dyno number you can...I look at it a bit differently...I want to show the lowest possible dyno number but still run real quick at the track...I get a big kick out of beating someone at the track and then they ask me how much HP I have...I tell them 278 RWHP (true) and they get all upset...he he he
Safety Car
Joined: Sep 2000
Posts: 3,524
Likes: 4
From: Hinckley Ohio
Originally Posted by Lichen
Well, I dynoed my car when the outside temp was 70*F and got 281RWHP. I went back to the same place when it was 107*F and got 265RWHP. Which am I to believe?
Very interesting........I thought we always looked at CORRECTED ratings that corrected for outside air temperature?????
So even if the actual tested rwhp varies with temperature the reported rwhp should be relatively constant?????
The other question I have is do you correct for outside air temperature or IAT.......these two can be quite different depending on your intake system.....
To get best actual hp you do want your intake air temp to be as cool as possible......hot intake air really kills performance.....]
Thread Starter
Le Mans Master
Joined: Feb 1999
Posts: 9,916
Likes: 38
From: South Carolina
St. Jude Donor '03 & '05
Originally Posted by Fuzzy Dice
It appears you have a reason for wanting to show the biggest dyno number you can...I look at it a bit differently...I want to show the lowest possible dyno number but still run real quick at the track...I get a big kick out of beating someone at the track and then they ask me how much HP I have...I tell them 278 RWHP (true) and they get all upset...he he he
Team Owner
Joined: Aug 2005
Posts: 34,988
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From: Riverside County Southern California
Co-winner 2020 C4 of the Year - Modified
2018 Corvette of Year Finalist
2017 C4 of Year
2016 C7 of Year Finalist
St. Jude Donor '09 thru '20
Originally Posted by Alvin
I had a guy who was crazy about doing over 300rwhp. (mustang) so after we tuned it we still fell about 6hp short.
we aired up the tires to 40psi and put wet rags on the intake and the next pull did 305rwhp.
we aired up the tires to 40psi and put wet rags on the intake and the next pull did 305rwhp.
Does he carries wet rags in his rustang for street races?
Drifting
Joined: May 2003
Posts: 1,730
Likes: 1
From: Charlotte NC
St. Jude Donor '05
I know right.. i'm jsut glad I made the mark on him when he got his new motor..
He said he was going to be dissapointed if it didn't do 480rwhp.. first few pulls where barely 400.. with some work fiinally got it up to 480 without the damn rags, ice, and air pressure
He said he was going to be dissapointed if it didn't do 480rwhp.. first few pulls where barely 400.. with some work fiinally got it up to 480 without the damn rags, ice, and air pressure