6600 on stock rod bolts, if i had aftermarkets id prolly spin to 7k

 

People keep stating numbers that they have there specific car set @, but there are more variables then whta someone else's car shifts at IMO. Get it on a dyno and find out where you peak then set it accordingly. If you peak @ over 6600 then look into getting ARP rod bolts. Just my .02

 

word i wouldnt go past 6600 with factory rod bolts, cause they will stretch and will break if u push the motor to far.

 

Any issues with stock timing chain reving to 6600??

 

My trex makes peak power at 6,600 and my rev limiter is set at 6,900. I usually shift at 6,800 to 6,900 or bounce it off the rev limiter. It's hard to tell when to shift because my tach is so slow it says 6,500 when its really a lot higher. My friend shifts his MS3 zo6 at 7,200.

 

here is how you figure out where to shift.

get on a dyno, get a complete power curve for your engine (NOT just the peak, go a bit farther). Find one of the calculators that shows you speed vs engine RPM based on gears, tire height, etc and make sure it accounts for transmission gear (heres a decent one: http://www.camaroz28.com/services/calcs/) Calculate what your HP is at say 6500RPM. Then calculate what the RPM will be if you shift into the next gear FROM THE RPM YOU USED FOR THE FIRST CALCULATION. If your HP after the shift is lower than your HP before, you need to shift at a higher RPM. Basically you should lose no HP from shifting. Do this for every shift, and you are good to go. For many people this means you will be shifting a lot higher than your comfortable with...such is the downside of the big *** cam you bought

EDIT: just noticed that camaroz28.com has a shift point calculator based on this theory right on that page...wicked

 

here's a shocker...this is using a stock LS1 dyno, however I had to estimate the 7500+ numbers so it may drop a lot faster than that...

Bowling's Optimum Shift Calculator
Input Parameters Are the Following:

* Transmission Ratio One = 3.06 to 1
* Transmission Ratio Two = 1.62 to 1
* Transmission Ratio Three = 1.00 to 1
* Horsepower = 70 at 2000 RPM
* Horsepower = 150 at 3000 RPM
* Horsepower = 185 at 3500 RPM
* Horsepower = 225 at 4000 RPM
* Horsepower = 275 at 4500 RPM
* Horsepower = 325 at 5000 RPM
* Horsepower = 340 at 6000 RPM
* Horsepower = 275 at 7000 RPM
* Horsepower = 160 at 7500 RPM

Computation Results:
Using the Criterion for Maintaining the Same Horsepower Before and After Shift:

Finding Best Shift Placement Points For Ratio 3.06 to 1.62:
# Found optimum shift RPM at 7308, which achieves 214 horsepower and lowers the RPM To 3869 after shift

Finding Best Shift Placement Points For Ratio 1.62 to 1.00:
# Found optimum shift RPM at 7082, which achieves 261 horsepower and lowers the RPM To 4372 after shift

Maximumizing the Area Under the Horsepower Curve:

Finding Best Shift Placement Points For Ratio 3.06 to 1.62:
# Found optimum shift RPM at 7480, which achieves maximum area under horsepower curve, and lowers the RPM to 3960 after shift

Finding Best Shift Placement Points For Ratio 1.62 to 1.00:
# Found optimum shift RPM at 7355, which achieves maximum area under horsepower curve, and lowers the RPM to 4540 after shift

 

well i guess i will keep it below 6500 for now, since i don't have aftermarket rod bolts. Thanks for the huge response.

 

I shift right at the redline no more than 6200rpm

 

6500 to 6600 RPMS is where I shift.

 

stock bottom end with f13, i shift at 6700.

 

my limiter and light are set at 6400

 

FM13 I shifted @ 7,000 for best ET and MPH
T-Rex only a few passes and shifted @ 7,200

 

7200 here, ARP rod bolts & built bottom end. No higher for me without better lifters & springs. I subscribe to Magius' theory regarding maximizing mechanical advantage.

 

I shift at ~6800 and my limiter is 7000. I have the same problem with the tac being about 700 rpms too slow. I have my shiftlight set at about 6700. Stock bottom end here with a 228/236@.50 588 lift on a 114 LSA cam, stage 2 ported stock heads with dual valve springs and a retainer kit.

 

93k on stock motor shifting at 7200 in the camaro. cam makes power till like 7300 on the dyno. i just think shifting at like 7400 is a little excessive seeing as im prolly rattling the hell outta the bolts now. when the new cam goes in im intrested to see where im gonna have to shift it! 245/250 cam in a 346 a4

 

Shifting at 7000 with a 7200rpm limiter. Stock shortblock with ARP Rod-Bolts...