DYNO Comparisons Focused on Driveline Efficiency




That I had purchased 4 years ago not fitting inside the torque tube after
Installation on the driveshaft ($340.00 we'll see how their lifetime warranty
Applies to a part that NEVER fit its designed application lol) replaced with
Poly couplers from DSS ($400.00).
Expecting the 320 LPH Fuel Pump any day, good time to do it now before Engine &
Dry Sump Install in November.
I will do some Heat Cycles for the Diff and put 300-500 break in miles on
the clutch before returning to Dyno so hopefully ~3 weeks.




since 1989 so no change to measure. As a Dealer I am able to
Write Off 70-80% of what I have spent on this project which
by completion this year will be over 3X the initial purchase
($14.5K 10 years ago) So mentioning every now and then
should help justify the Write Off according to my CPA
(Also an Avid ZR1 Track Addict). Hopefully readers
will put up with this inconvenience lol.
I am joking of course. Parasitic losses from fluids is a very real thing - contrary to what LS1Tech will have you believe. I love Amsoil too.
Many of the Big LS HP Tunes in the SF Bay Area says the STP
Numbers are within 1 % of Dyno Jet STD Corrected #s.
Recent example 625 RWHP Here VS 620 RWHP on a corrected
Dyno Jet. Correction factor typically .99-1.01,
elevation is ~75' above sea level.
More concerned with the changes then absolute #s for this
Round of testing.
It should be no problem for him to plot your graph(s) using SAE factor or even STD. Be interesting to see the difference in numbers reading SAE correction factor on his Dyno.
I like Mustang Dyno are similar low reading Dyno VS Dynojet.
Engine in my car makes 360 SAE RWHP on a Mustang Dyno & 409 SAE RWHP on a DynoJet.
Weight to HP ratio on car is 9.97 Lbs per HP on Mustang and 8.71 Lbs per HP on a Dynojet.
Regardless of Dyno numbers, on Long Black Dyno, 11.78, 60' 1.97, MPH 119 with 300 TW street tires, 2800 stall converter, 3.55 rear gear. Can't even spin the rear tires...LOL
It should be no problem for him to plot your graph(s) using SAE factor or even STD. Be interesting to see the difference in numbers reading SAE correction factor on his Dyno.
I like Mustang Dyno are similar low reading Dyno VS Dynojet.
Engine in my car makes 360 SAE RWHP on a Mustang Dyno & 409 SAE RWHP on a DynoJet.
Weight to HP ratio on car is 9.97 Lbs per HP on Mustang and 8.71 Lbs per HP on a Dynojet.
Regardless of Dyno numbers, on Long Black Dyno, 11.78, 60' 1.97, MPH 119 with 300 TW street tires, 2800 stall converter, 3.55 rear gear. Can't even spin the rear tires...LOL
Superflow STP corrected numbers in this case are about dead on with Dynojet SAE corrected numbers in the 600whp range with both at sea level in this case. Superflow SAE corrected numbers would be lower then Dynojet SAE numbers.
At the end of the day before and after on the same dyno is what matters.
I don't believe you will ever see 1/4 mile numbers out of this car.
At the end of the day before and after on the same dyno is what matters.
I don't believe you will ever see 1/4 mile numbers out of this car.
But assuming an honest attempt at keeping the dyno properly calibrated by the respective owners, you're not that likely for a 480HP car to be 350 on a different dyno. So, I still do take dyno numbers at face value, knowing there's a +/- 5% slop in there. Someone says their car dyno's 440, I take it as it's close to that. Could be 425, could be 450, but it's close. Typically guys who track often, their track performance will back it up.
In the end, your 1/4 mile trap speed and DA when you ran it are probably the best power metric, but even then, driver skill, wind conditions, track surface, tire selection... there are still variables so it's not perfect either.
I still think that for what the OP is proposing, as long as the yard stick is consistent, differences will be real and valid.
The Best V8 Stories One Small Block at Time




In SSF, complete Driveline and rear suspension R & R (coilovers,bushings,
And braces, trans/diff, & trans to chassis) feels really solid & tight.
These guys are really GREAT! only place that works on my
Corvette along with Abel Chevrolet, the Two best shops in Nor Cal
for LS Performance IMO.
Ditos did 2 heat cycles for the Ring and pinion gears, one static,(wheels elevated) one dynamic. First time driving car & clutch since Hernia procedure
left side ~6 weeks ago so somewhat apprehensive. Clutch feels Awesome! I don't believe it has+10% more pedal effort than stock.
Glad I listened to Tony, recommending new OE Master & Slave cylinders,
VS Aftermarket.
Pedal engagement is very progressive and engages roughly
In middle third of travel. Needs about ~+150 RPM to engage from a
stop on flat pavement (no hills of SF LOL!) I could definitely feel less inertia
from a stop, I did NOT stall on the way home, ~ 10 miles 12 stops 1500-3000 RPM easy driving. Thursday (little sore Wednesday and decided not to push
it, 59 years old and a Personal Trainer for 34 years, decided to follow my
own advice I give to my clients, lol) I drove ~ 17 miles, got on it
a little, shift 1-2 @ 5K, 2-3 @ 5K, then@~4K in 3rd <75 MPH
(service active handling engages early, not at 80 MPH like dash warning says so fun over). Definitely feels like it spins up a little quicker in 2nd so far
anyway.
I knew replacing my active shocks with coilovers would do that till I
get to Abel Chevrolet to tune out with Tech II, on 20 Oct.
7+ years to this point I can wait a few more weeks, in the meantime I am in
So Cal for My In Law Memorial Service this Tuesday, then preplanned mini
vaca next weekend. I will do 2 more mellow heat cycles and then figure 8s for the LSD, then Abel and some Hwy Break-In miles before changing fluids
and a return to the Dyno,
Contrary to my Tuner's comment I will try to
get up to Sonoma Raceway for a few 1/4 mile passes (weather and track schedule permitting) before going back to Abel again, in mid November for the
396" Install.
Update turned out to be more then a little.
Thanks for reading.
Last edited by NAVYBLUE210; Oct 8, 2017 at 02:14 PM.
That on STD correction definitely reads little higher than a Dynojet on SAE correction, they are prob equiv STD corrected





