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Halltech fixes the "short change job GM did on the Z06 intake.
Agreed, I tell people about the gains (don't have one...yet) and they say BS immediately, then I explain the LT1 and LT4 use the SAME airbox. Then they believe it. Typical sandbagging by GM.
I would think that 52 RWHP would equate to more than 50 HP added at the crank.
If you make the assumption that the car had 650hp at the crank prior to the install, there's a good chance it's actually putting out 700 or more at the crank.
I would tend to believe the rated horsepower is more accurate than some driveline loss calculation. Dyno's are great at measuring a change, so I would think the gains are real. Not so great at determining an accurate horsepower rating.
What I'm saying is, I tend to believe that your intake is adding 50 crank HP or more as shown in the many dyno results. I would think it's fairly safe to say that the intake takes the crank HP up to 700.
I would think that 52 RWHP would equate to more than 50 HP added at the crank.
If you make the assumption that the car had 650hp at the crank prior to the install, there's a good chance it's actually putting out 700 or more at the crank.
I would tend to believe the rated horsepower is more accurate than some driveline loss calculation. Dyno's are great at measuring a change, so I would think the gains are real. Not so great at determining an accurate horsepower rating.
What I'm saying is, I tend to believe that your intake is adding 50 crank HP or more as shown in the many dyno results. I would think it's fairly safe to say that the intake takes the crank HP up to 700.
That was my first thought, too. Isn't 52 rwhp more than 52 hp at the crank? What am I missing here?
I am by no means an expert on this subject, but I typically hear and see a 15% to 18% difference/reduction from the crank to the rear wheels. Estimating that my car starts with 650 hp and an 18% reduction through the drive train, my rwhp should be 533, which is about what it dyno'ed at last week. As we all know, "actual" rwhp always depends on the type of dyno, air temperature and a few other variables.
So as Hot Rod Tod noted above "Dyno's are great at measuring a change" is my opinion also. "Actual" rwhp is pure bragging rights.
Yes, I was going to do it myself but want a before and after dyno with relatively similar heat, air, etc. circumstances to get an "accurate" reading of rwhp gains.
But it does look like a simple 45 minutes to an hour process!
08-20-2015, 08:11 PM
Halltech Stinger-RZ Dyno today from G-Force
Are the sleeves shipping Jim 
