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Murlo26
03-21-2011, 01:05 PM
well I'd rather have it reading too high so you get a lower power/safer tune then reading low.

I will confirm with my wideband on the street which will be a better judge.

mlomker
03-21-2011, 01:39 PM
That makes way too much sense, now whose device is faulty?

Well, my AFRs were not a point off at RS. Shane has told me that he uses one of the most expensive widebands and I doubt he'd do so if he didn't think it mattered.

Murlo26
03-21-2011, 01:52 PM
AFR's on the short runner didn't change at all really. We are swapping that out for the next manifold now.

Looks like average gains of 25ish whp 13 wtq.

Graphs and stuff will be done later tonight or tomorrow night. I guess it will depend on when I get all those graphs.

C3L1CA
03-21-2011, 02:12 PM
I've never been on Map's dyno but my wideband showed exactly what it did when Shane tuned all of my cars. I'd go with Shane's dyno being a bit more accurate.

v8klla
03-21-2011, 02:34 PM
Could this be why numerous people have reported their cars leaving MAP's dyno with less power than when they arrived?

Do you have any examples of this? We obviously start with a baseline and I can't recall a car leaving with less power than when it came in...

Murlo26
03-21-2011, 02:36 PM
I guess I haven't heard that either Chris.

I didn't want to start a debate about how the widebands read, was just curious if others see the same thing. It sounds like they do.

I will confirm with the wideband I just bought from MAP this weekend or next week sometime and report back.

The tail sniffers are never perfect and everything is prone to error to some degree.

v8klla
03-21-2011, 02:41 PM
Yep I agree the absolute best option is a permanent install further up stream, next time we get a car with one on the dyno I'll be sure to compare both readings.

Matt D.
03-21-2011, 03:15 PM
Do you have any examples of this? We obviously start with a baseline and I can't recall a car leaving with less power than when it came in...
Of course not, no one would ever post this online. It's all been word of mouth.

v8klla
03-21-2011, 03:26 PM
Well we broke the stock ECU Evo 8/9 record twice using this wideband and I trust it with my personal car. Cars don't come in here for tuning and leave with less power unless they are knocking and on the ragged edge, in which case we did the customer a favor. /rant

Murlo26
03-21-2011, 04:21 PM
Well...very very interesting results so far. I honestly am a little dumbfounded that we got what we did with the FID.

The FID still picked up power over the stock ported mani...but was basically put to shame by the short runner from MAP. We are starting to wonder if the short runner is the BALLS of all the manifolds, lol. Still have the MAP long runner to test.

Now timing seems to be very consistent on all of these runs we are doing. I think the AFR's are all pretty close as well.

I am going to put graphs up later of the logs for timing/boost etc but wow is all i can say...the short runner had 20whp over the FID for their best runs. Average was closer to 10-12ishwhp over. Keep in mind we didn't do any tuning at all...just been watching AFR's and knock so far.