Thanks LB...could not get the original post to open up.

Doug...based on your findings, is it best to purchase a tune using the GMS MAF and harness, or using the stock MAF? Have you been able to determine the actual function of the MAF/Harness combo? Thanks in advance!

 

Thanks

 

On the tunes I made I used the stock MAF installed as it is the best point to start from with any tune. I would highly recommend a dynotune for this intake.

Thanks Doug.

 

Doug,


I sent you a PM and an email. I know you're busy, so no rush, just letting you know

 

I am sorry but I can't remember who I was speaking with on the dyno day that had saleen underdrive pullies. I have found a kit available but it only lists the crank and waterpump pulley I believe, at least if the small pulley in a 3 pulley kit is for the alternator, then those are the two I see in this kit. Are yours red? Where did you get them? How was installation? I am wondering what the deal is with these 2 piece kits, and 3 pulley kits I am seeing. Will they give the same gains. Is the alternator pulley not resized, is it just for looks? Any info you can give on the subject is greatly appreciated. BBK also seems to have a 2 piece pulley set, but on saleens website they show 3, so not sure whats up with these kits.

 

Here is a scan of my dyno sheet with the granatelli intake. If you cant read, which I cant pm me and I will send you a legible copy. Thanks again doug, great shifts etc.

 

Thanks for posting your info, on the first dyno run was that with the GMS CAI and its MAF and harness assy? I do see that the first run was a little lean, what other mods were done to your car? Aside from the a/f, so you went from 259HP with the GMS CAI and MAF, to GMS CAI and stock MAF with a custom tune, and you ended up with 259HP?

 

No I think this was the last runs done on the car with the regular maf I believe when he had adj the a/f for my final tune. I am waiting on my other ones to be emailed to me. This was the only print out I actually took, which was the last ones done. I will post my one with the granatelli maf as soon as I get it. I thought this might have had that info on it.

 

Just trying to understand your sheet data.

Run 1 was the GMS intake with the stock Ford MAF sensor (not GMS)
Run 2 was the same set up but with Doug's tune.

RUN 1 and Run 2 show no difference even though Doug radically corrected the A/F ratio?

More confused than ever.....

 

That was his emailed tune file and then I corrected the a/f and this is the same tune with the a/f better.

Actually, from that sheet that is two of the same runs, run 1, and then run 2.

That isn't the stock run with the GMS intake. I'm working on getting the dynofiles as we speak, Andy went by and got them.

Thanks, Doug.

 

OK, I really am not trying to start anything here, but after everything that has been posted with regards to this ongoing debate, and mainly because of the venomous nature of most of those posts, I feel I have to say something. I think we can agree that most people don't ever actually get their car dyno-tuned. Most people will buy an aftermarket CAI that requires a tune, and as soon as they open that box up and install everything, the first thing they do is load up one of their "canned" tunes. Now, in the first dyno pull, that is the "canned tune" that was sent to him with his tuner, that was supposed to be for a C&L intake I'm assuming. Now, if this had been someone else, someone who hadn't gone to St. Louis to get a custom dyno from you, just a typical CAI customer, and they loaded this tune (hypothetical same car same tune), then they would be running extremely lean wouldn't they. Now, how would they know that? They wouldn't. Unless they got their car dynod. Sodaman, had you already loaded up that tune and were using it before you got to the dyno run? If so, had you gotten any CEL's?

 

Dyno files have been sent. Picked them up today.

 

Hey Doug.

Check your email man.

I sent you one yesterday.

 

My thoughts exactly. If the canned tunes that were sent with the scanners are running lean, then I just have to wonder how many people are running these same tunes without getting their cars dyno tested and are running lean as well. I know that nobody is perfect. But a lot of people just load these tunes and assume that they are good, apparently they may not be as good as people think. I am sure they feel a difference in performance just as the GMS guys do and they think everything is fine. I have to wonder.

 

EVERY car is a little different. Just go to the dealer and drive 20 different identical cars.
No canned tune will work on all cars.
Some cars will work perfectly on a canned tune.
Without an A/F reading you don't know what is going on.

 

Although identical cars may seem the same ? each one is calibrated differently from the factory and therefore responds to both modifications and tuning differently regardless of whether or not it happens to be a custom tune ? or canned tune ? I have the SCT X-Cal II SF canned tuner and after being dyno tested ? my A/F was a lean 13.5 at WOT and as a result ? the dyno tech had to add 6% more fuel in order to bring it down to a more optimal 13.1 level..The case in point is ? although I didn't experience any check engine lights or any drivability problems ? my car was still running lean and this was with running 93 octane in the tank..I can just imagine if I had been running 87 ? I probably would have ended up hearing knock and pinging for sure..So in the end ? I'm sure glad I got dyno tested when I did..

 

Yes, I am well aware that there are differences, however slight, between one car and the next. My point is, you are taking your chances with ANY CAI, not just the GMS, nor the K&N, nor the JLT, whatever. The only way that YOU are going to know for sure, as a consumer, is to actually get YOUR car dynod. Otherwise, take your chances like everyone else. And you just proved my point by your comment, you were running lean initially too, and you had to get it tuned correctly because you actually got your car dynod. But how many people actually do that? So how many people do you think are out there driving their cars with tunes right now that don't know their a/f is actually leaner than norm, or optimal. So why, again, does everyone want to single out the GMS because some of those were running lean. And btw, I still have yet to see a single GMS dyno sheet with its CALIBRATED MAF and harness showing that.

 

I can't speak for everyone else Redfire ? but the reason why I got dyno tested ? was for the reasons I stated earlier and because my Stang means that much to me, so by spending the $85.00 + ? was well worth it for my own piece of mind..

 

Yes I was running the gms cai with a C&L tune, so yes I was taking my chances, but no cel had come on. I new I would only be driving it a couple of days before I saw doug for the dyno day. So I tried it, and no CEL'S, then the dyno day. I think everyone is trying to say the same thing here, we noticed it was lean and fixed it. I dont think anyone is saying any of these cai's are junk, I love mine. I just want people to be aware it is in there best interest to see what theres is doing. that's all everyone is saying. As soon as I recieve all my dyno sheets I will post them. This is my first time dynoing, and I am still trying to understand it all just like you all.

 

Sodaman,

Were you still using the GMS MAF and harness when you loaded the C&L tune or had you switch back to the OEM Ford unit when you loaded the C&L tune?

Just trying to keep all the data straight in my head.


Doug,

I'm still suprised that after correcting the A/F ratio there was no HP or torque change across the whole range.