Amen mcduck.

 

Step 1 complete.

Need someone to cover the CPR dyno cost and for Sharif and the rest to work out a day to dyno at both locations.

 

The Dynos were already done at CPR's, they were posted in the first post of this thread,.

 

He is talking about redynoing his (McDuck's) Z at both places.

 

Andy, I won some dyno time when I was at the Carolina Z club show. You're more than welcome to use that gift certificate.

*Edit, I need to make sure the gift certificate is at CPRacing.

 

what's taking so long? trying to install some more goodies???

 

This is part of the reason why this thread has gotten so ridiculous. As Mcduck stated.......drama, drama. Yeah it must be a conspiracy; they're trying to hook up a Turbonator right now. I'm sure CPR and Sharif have nothing else to do right now.

McDuck's test seems fair if all the variables are consistent and there is a large enough sample to minimize variations. Patience.

 

most dyno operators around here will give you three pulls for around $50. That should be enough for some average figures.

 

man thats great, around here in MD 3 dyno pulls run 80-85 bucks!

 

This sounds like good idea and all, but I want to know what "G I love my car" car will make. We already know that his numbers will not be exactly equal to a dynojet, but I would still like to know what he will be on a dynojet. I a not in any rush to know like some of the people in this thread. Just whenever he has a chance and even if he doesn't deside to dyno on a dynojet and just leave it alone, that's fine by me.

 

mcducks car doesnt really interest me in this comparison. I have already heard of 1 or 2 cars that had very close results on CPRaces dyno and a dynojet 248...

The dispute is that the 1.13 correction factor will not apply to all vehicles. The truth remains that any car you dyno on both dynos will have some of percentage difference... but that percentage will vary. Mcducks may be that 13% car, and then it devalues this entire arguement, where the car in question is clearly not a car that is going to convert with the 1.13 correction.

We have a perfect car right now with "G i love my car" to prove that the 13% will not apply to all cars.... mcducks might not prove that.

I say dyno the car in question, or we will never know. Putting mcduck on the dyno in his place will only create more questions.

 

This is crazy. Whether you use a Dynojet, DD, Mustang or whatever Dyno, there is variation from one to the next even within the same brand and model. You can hit one Dynojet and then go to another Dynojet down the street (same model) and get a 10+hp gain. Take the numbers for what they are, before and after improvements using the same dyno with the same settings and correction factors to figure out what the gains were from the modifications. I still don't know why everyone wonders about the 300hp NA mark because it was broken a long time ago by mjedens legitimately and on a Dynojet that consitently reads a bit on the low side comparitively. Once he hit that mark, the thrill of the chase was over for me, and he did it before there was a tuning solution for NA cars. Sure he had internal work done, but he still hit that mark on a respected Dynojet which is good enough for me to know it can be done. It would have been interesting to see what he would have put down after proper tuning with an EU or UTEC. If "G I Love My Car" gets a dyno on the dynojet it doesn't tell him much because he has no baseline to compare it to, all it does is tell everyone in this thread what they already know and that is different dynos yield different results! To do a proper correlation study between the Dynojet and the DD you would have to perform way more than one Dyno session with one car to yield anything accurate so that idea does not hold water. I am truly happy for G as he saw some really nice gains from a good tune and to me that is exciting news for us NA guys that have been waiting for a tuning solution that was truly adaptable and didn't require mail-order transactions across the country.

 

this is not true. one dynojet 248c to another at close to the same altitude and with the car strapped down correctly will be within a couple HP of another assuming equal conditions too. The same model dyno can be much more accurate then you would think. I owned one for 4 years and experienced it many times.

 

There are two dynojets locally. From what I've read from some of the local guys, there has been 10, 15, and 20hp peak differences between the two dynojets within a few weeks time. Generally same altitude, similar conditions. The only difference is models.

 

then they are not doing it correctly. if you dont stabilize the bearing temps and the let the car center itself this can account for differences like that. Or one shop could be using STD vs SAE correction or no correction at all. Or one dyno could be much older then the other and never been regreased, or maybe one was overgreased. There are many variable that can throw it off... but I dont think I believe you that they are as far as 20hp difference if the environment conditions were the same.

Dynojet 248c dynos are all identical in construction and there is nothing that is going to change the mass you have to spin and there is no way to alter the load on the car. It will always be what it is. If there is a difference between one dyno and another, it definatly doesnt have anything to do with owner manipulation and self proclaimed corrections.

its not a miracle that most the cars on here with the same mods are making within a reasonable range of the same HP of one another... except this car of course.

On my dyno I had countless all motor domestic guys telling me how my dyno seems to read identical to another local dynojet, as they were very happy to see that there car made nearly the same HP that it made on whoevers dyno that was they were talking about.


EDIT: i just noticed that you said "The only difference is models." That changes everything. Its funny how you say "the ONLY difference"... thats is a major difference, if its a compeltely different dyno I would not expect it to read indentical.

We are discussing dynojets model 248c.

 

Yea lets use the numbers from a FI Z, great idea

 

My proposal was to validate the comparison between two different brands of dynos. If the numbers come out close, then the correction factor is within reason. It **shouldn't** matter whether the car makes 200hp or 600hp, the correction factor should be about the same. I don't know for certain if that is the case, but that is they way it should work otherwise the correction factor is absolutely useless.

If the correction factor, as phunk proposes, changes drastically from one power level to another, then no level of comparitive testing is going to prove a damn thing. The only true test you then have is to pull a completely stock Z up on the Dyno Dynamics and see what it pulls, do all the mods and tuning they did on G I Love My Car's Z, then do pulls after and compare.

My test gives a clean efficient means to put this thread to rest. I offered up my car because I can bend my schedule around those running the test. Something "G I Love My Car" obviously cannot do.

This thread has just proven to me yet again why this forum is far inferior to others I frequent. People would rather drag out the drama than conduct a simple definitive test to get some facts. It may not be perfect, but it would be a helluva a lot better than what we have now which is no damn clue whatsoever.

My offer still stands... Lightning Guy has offered to pony up 1/2 of the dyno expenses. If Eric and Sharif will schedule the time there and Dave Brown Motorsports, I'm still game. At worst, we'll at least have some hard factual information instead of more jerk-off speculation... which is all this thread has produced thus far.

 

I just had an even better idea...

Same setup as before... my car... dyno on the Dyno Dynamics, then Dyno on a Dyno Jet.. dates set around when Eric, Sharif and the gang can set things up.

After the test we report the true DD numbers and the true DJ numbers. No corrections. That way we can see exactly what the car puts down on each dyno and see the difference. From there, the true DD numbers can be pulled for any car CPRacing and Sharif has tuned and a valid comparison can be made. (for those not following along, go back to your elementary school mathematics books and look up 'extrapolation').

This works regardless of my car being FI because at some point... some RPM level.... my car is making 314rwhp. The graphs can be compared at a specific RPM points, not just peak.

I'm game either way.

 

This thread is about "G I LOVE MY CAR's car and whether his car has truly reached that majical 300Hp with his mods..Not anyone elses car.. his car! In question is the validity of his dyno data not someone elses dyno or what someone elses car will dyno on other dyno's..Very simple question 'What does his car put down in terms of Hp"..?? Some question his #'s on the dyno he posted and some have suggested his dyno #'s are suspect as it relates to a correction factor..He posted and some don't believe in the accuracy..Only on his car dyno'd on a D.D followed by dyno on a D.J. will prove if his car has reached that majical # ..

 

Hey Big "A" call eric and find out when I can get on the dyno and u will understand why this is stale right know. As soon as we can get my car on the dyno it will happen, untill then I am waiting. If anyone wants to find out weather or not my car is really making 313 its me, its my car, my money and time that has been spent on the car. So everyone please understand I want this to happen as much as everyone else, so just relax and when everyone that is INVOLVED can get together we will post, video tape and take many pictures with clocks and computers and Lee Harvey Oswalds gun to prove our findings. Untill then I say, Good Day Sir.