babyboigsxr

Car 1

Shorty headers
PLM heat exchanger
Johnson IC pump
Belt wrap kit
74mm supercharger pulley
No cats
X-pipe
Resonator delete
C63 mufflers
Custom tune

(Dyno-Jet)
Dyno results... 480 HP / 530 TQ



Car 2

Carbonio intake
Green filters
Intake scoops
Mid-length headers
180mm crank pulley
Eurocharged heat exchanger
OEM IC pump
Primary cat delete
Resonator delete
CLS55 mufflers
Custom tune

(Wind Tunnel Mustang Dyno) - aka... said to be a "conservative" type of dyno.
Dyno results... 466 HP / 626 TQ





Run #1
Cars 1 and 2 attempted to run from a complete stop. LMAO. Terrible move... neither of the cars could gain traction. They pretty much did a burnout through the entire intersection.

Run #2
Rolling 40 - 90... both cars head to head (due to the curve on the road)

Run #3
Rolling 40 - 105... Car 2 was ahead by 1 car length the entire time.

Run #4
Rolling 20 - 100... Car 2 pulled ahead by half a car and kept that distance the entire time.

Run #5
Rolling 30 - 100... Car 2 was ahead by 1 car length the entire time.

Run #6
Rolling 40 - 105... Car 2 was ahead by half a car length.



Based on the mods listed for both cars, and the huge difference in TQ numbers, below is what I don't get...

• Car 1 has 20 HP more. It would slowly pull away at top end / higher speeds, correct?
  
  
• Car 2 has nearly 100 lbs of TQ more, shouldn't it have pulled away drastically?
  
  
• I understand the mods aren't apples to apples. However, shouldn't there be a noticeable difference between the two cars during all the runs?

MTV10

Different dynos... can't really rely on the #'s. The real world results speak the truth - Car two is faster.

PieRat

Car 2 is more like 521.92 whp on that dynojet. Mustangs typically read 12% lower then Dynojet according to the internet.

Pinned

Haha.

As with any dyno, it's all about the calibration. You can force any numbers you want out of it, but the only way to truly compare is running on the same equipment in the same weather back to back. The dyno is a tool for calibration, tuning, etc - comparison of differently modded cars on different dyno platforms isn't all that useful.

sexyxe

That torque number is so much bigger than the hp kinda makes me think something is up...

Of all of the things listed they both only have two power adders. Shorties and 74mm, mids and 77mm (equivalent). Seems about right.

benzslo

That's why you don't race dyno numbers.

Dynos are a good tuning tool and that's about it.

M3diesel

Take it to the track and get it off the street.

Too many dyno queens around here now.

Dyno numbers don't mean $H!T except to bench racers and there are quite a few of them around here!

seanol

There is no calibration on an inertia dyno. It is simply the modeled mass of the drum(s). Pressure, temperature, and humidity are used for the correction factor. As long as you use the same correction factor the variable is the vehicle tested.

The reason the results are different is that there is a load on the Mustang dyno that is not present on the Dynojet.

Mustang is using a proving ground calculation to infer resistance imposed by air.

You can not compare dyno's from different manufacturers as they all have their own idea of how to calculate the number. That makes any number impossible to compare between manufacturers. It is the same with engine dynos.

As such you could compare your car to someone else on that same manufacturers dyno or you can baseline your car and then modify it to see what gains (or losses) you may have. You can not compare your numbers to numbers obtained on another manufacturers dyno.

Hope that helps. There is a lot of misinformation about dyno's. I wrote a post a while back that may help you: https://mbworld.org/forums/w211-amg/...operation.html

oneslow55

This why i hate dynos and those fudged mustang dynos,I only use dynojet.Line them up best way to tell the story..Street tunes are the best imo.Fyi tq wins races.!!00 ft more tq is like a child fighting mike tyson.Nothing like crank pulley vs a upper,crank is far more harsher then a upper ..Same tuners?

jkiddd33

Agree completely car 2 makes more power if you were to put them on the same dynjo jet. Car 1 has shorties/77 not a 74.

Car 2 would most likely put down 510-520 on the dyno jet. Ask me how I know why? Well car 1 is mine, and a friend of mine has the same exact set up with the same custom dyno tune. Only difference is he has EC mid lengths. He made 510/550 on the same dyno. (He pulls multiple cars on mine) Car 2 with a dyno tune should pull about the same)

The fact car 2 shows 600+ on torque raises questions. I would dyno it and see whats going on. Yes, dyno numbers dont mean anything and alot goes into play with these short runs but its always good to see what your graph looks like. (IATS, AFR on the tunes etc)

oneslow55

You didn't read what I wrote crank vs upper pulley just cause the 77 they say is like a 180 ,it's not!!!

A 180 will make more power and tq then a 77 any day of the week .

That dyno number of the tq for the 180 car is real ,crank is brutal the hit and feel .Cranks spools faster too!


What was your boost hitting and afr you ever mentioned this which is important

PieRat

Why is crank better than supercharger pulley? I have 77mm and peak at 13.7psi. I have kleemanns and no cats/x pipe.


PieRat

jkiddd33

Who are you talking to? If me, I didn't say they were he same. My point is his car should make more power and pull on me much harder. It's his tune and I'm sure of it as it's a safe one running pretty rich.

If youre talking to me. Max boost for is 14.3

ill attach my graph as well.

jkiddd33

If his torque is correct then he should be walking me. Car/ half a car doesn't show how drastic the crank is vs the sc pulley you're claiming. I've been trying to get him on the dyno so he can get some data on his set up.

This is just my opinion running vs crank pulley cars/ SC pulley cars with about equal mods.

oneslow55

That afr is little high for my liking ,I like to stick to 11.6.a car and a half is a huge difference at a track so yes ,his car is graph is real