ET and speed headsratcher

[PRHeads]

The moroso chart shows 113 is good for an 11.60.

You’re pretty close.

IMO, Unless there is a noticeable problem with “the car”(which is everything that isn’t “the motor”), you’re going to have a hard time finding significant ET gains until the speed(power) comes up.

 

[66Satellite47]

I may be way off here, but seems to me like lack of MPH comes from two things, fuel delivery or cam/head capability. A higher shift point should help. More gear would help. IMHO. Dyno numbers are numbers, the track is reality. The dyno is a good indicator and good for initial carb tuning. Then comes the product on the track.

 

[Sweet5ltr]

I would be more impressed that a car is running 11.7 @ 113 MPH (rather than 116-118 MPH), shows the chassis is fairly sorted out.

MPH is derived mainly off actual RWHP (to be more exact, power to weight). You may be surprised at what you'll see on the chassis dyno, actual engine power output on an engine dyno and what the actual output to the tire is, will be absolutely different.

Challenger Hellcat, 11.2 @ 125 MPH, 707-HP. (4,488#) puts out around 620-rwhp -.157 power to weight ratio.
C6 Z06 Corvette, 11.5 @ 127 MPH, 505-HP. (3,147#) puts out around 440-rwhp - .160 power to weight ratio.

^ you won't be surprised, but when it was released, many were running 10.9's on drag radials (100% stock otherwise) with the C6 Z06 corvette.

When we talk about power, it's simple, where do you want the car to accelerate the hardest? Is it from 3,500 - 5,000 RPM or from 5,000 - 6,500 RPM? The only way to get the car to accelerate harder on the 'big end' is to push the torque peak / HP peak to a higher engine speed, through camshaft and cylinder head modifications.

 

[Frank Mopar]

I want my car to run 11.7 all day. Ill take the efficient chassis over a couple of MPH. IMHO

 

[66Satellite47]

Consistency is the key in bracket racing. I did like big MPH. Cylinder heads & camshaft, maybe CR do that. A good working chassis is the perfect starting point. You do seem to have that. Your HP goes with what you want to spend. BTW too tall a tire with too tall a gear(lower numerically) will slow us down. Had that experience a couple times.