Thread: Budget Build

Progress cannot be made without controversy, and with the knowledge of the forums we can make our own decisions as to who to believe. Especially in this thread. I learned a lot just from reading this and listening to respected points of view on dynos and tuning. Good stuff. Supercowboy, welcome back. Setzer, sharp as ever. Charles, good points on the dyno discreptancies. Miko, good stuff. Clint, good points from down under, keep up the R&D. BenFenner, I agree with your statement on dyno accuracy and it's usefulness. Mr 4Door, lookin' forward to your 200whp build. Not trying to draw this out but in spite of the controversy with the 231whp claimed by Jun we want to squeeze as much as we can out of the VE because there is still more hp to be found. Don't know how much more, but at least this thread is moving in that direction. Looking forward to those track times.

Well thanks for clearing that up john!! So much drama over #'s. LOOk at the bright side of this tho ..we saw alot of sr20 big boys make appearances on this thread. We gotta stop argueing over petty shyt.
Remember we r suppose to be hatin the honda boys not each other.

Having looked at the new dyno graphs posted by supercowboy, I would have to say there's definately a glitch with this particular dynapack.

Look at the swithover points and you will see more pyramids. The graphs should be smooth like lonewolf's graph. Another thing that caught my attention was the torque curve after peak torque. On every VE dyno graphs I have seen, the torque curve will tail off after peak torque but not jump up like this dyno graph.

In general, a dynapack will read higher #s than most dyno's due to its' design. The tires, wheels, alignment, tie down straps tension, are taken out of the equation. Dynapacks by design are meant to measure close to flywheel hp as possible. Making 230whp/hub on this dyno does not mean it will make 290 at the crank, more like 240hp.

In my area, the dynapacks usually read 20hp more than the dynojets at sae.

I don't buy the claim "this dynapack was calibrated like a dynojet". I hear this all the time from dynapacks guys because their #s are usually higher than other dyno's. Most shops get more attention and business by having a generous dyno and not a tight one. Afterall, everybody bench race on the internet.

dynapack's do read higher than most roller dyno's.
in australia we have the same issue with comparisions to dyno dynamics (which you guys in the states dont seem to use)

In the end, despite what manufacturers/tuners claim, there is no real comparison between dyno's, they are a tuning tool.
People should be looking at gains after modifications on the same dyno.

In this instance, I would have liked to have seen a dyno for the motor before it was built, and then afterwards to see the gains, rather than the numbers.

Miko looks to be on target with his estimate, you can extrapolate data somewhat in that area, the "pyramid" is not a natural occurance.

That's right, did they have any baseline dyno run for this build, before this dyno session?

I don't think so, they put the motor together and stuck it on the dyno to tune it. Hey isn't 220 still the highest whp so far for a VE NA???

Don't chop my head off for not following this entire thing but it's been said the output numbers are "wheel" horsepower. Is there a setting for that on the dynopacks? You can get hub output no problem obviously, but do they have a setting to estimate wheel output?
Is that what we have here?
Speaking about the 220 horse power on repeated runs. Is that hub, or calculated "wheel"?

Jun for pres.


Dudeman

Remember that usually happens with stock compression.



Ive seen dynapacks read 20whp more than rollers. So What. If anybody who knows how to use a dyno They dont care about peak numbers. They use it as a tool to make changes safely.

We did have a baseline and the car made 210whp. We spent about 2 hours with the car on the dyno. The differance we made from before and after were huge. The car is very responsive. Plenty of power up top. The car turned super VE after it left the shop.
This is why you go to a dyno shop to have your car tuned...