Casper has White underwear

McRat

Diesel Hotrodder
Aug 2, 2006
11,249
26
38
64
Norco CA
www.mcratracing.com
I am not trying to be an asshole or bash what you are doing(with enough funds, i would like to do it to). But you changed too many variables like gearing, 7.1+l engine, lowered it some more ect; to test the reliability of the new engine with how you had it set up before the changes. The new engine at 3300 rpm should live a long while. The old engine probably would have held up just as well with the gearing and lowering changes. I thought you needed lots of rpms for those massive twins to stay fully spooled(4000+rpms)

Nobody knows what it will take. Last year it melted down at 3800 rpm, far below the power peak of 4400rpm. The high DA does have a major roll. It effectively reduces your turbo size.

The 10% increase in displacement will drop the power peak of the twins 10%, which was 4500. So now the peak will be about 4100. The twins also have a wider powerband than the big single. I can also tighten up the turbine housings.

My guess is we will need to leave it in 5th, but if I can run it in 6th, I will. It's nice to have options. We can also drop the drive tire dia 10% as well, and go 3650rpm in 6th.
 

Fat_Robi

I may be wrong, but...
Sep 7, 2008
232
0
0
Las Vegas, NV / Provo,UT
Nobody knows what it will take. Last year it melted down at 3800 rpm, far below the power peak of 4400rpm. The high DA does have a major roll. It effectively reduces your turbo size.

The 10% increase in displacement will drop the power peak of the twins 10%, which was 4500. So now the peak will be about 4100. The twins also have a wider powerband than the big single. I can also tighten up the turbine housings.

My guess is we will need to leave it in 5th, but if I can run it in 6th, I will. It's nice to have options. We can also drop the drive tire dia 10% as well, and go 3650rpm in 6th.

I am just excited to see Casper flying down the salt at crazy fast speeds! :happy2:
 

McRat

Diesel Hotrodder
Aug 2, 2006
11,249
26
38
64
Norco CA
www.mcratracing.com
Does the white paint affect the cooling of the rotors any? Does it even matter?

Minor effect. Rotors will heat a little quicker, but the rear brakes are overkill for this application. Most of the heat generated by braking is absorbed by the mass of the rotor, and the cooling is done afterwards. Majority of braking is done by parachute. Paint helps salt fall off.
 

z79outlaw

Member
Apr 20, 2007
793
0
16
37
Salem WI
Hopefully Casper doesent come out of all this looking like a midwest truck with missing cab corners and holes in floorboards
 
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