GT350 Intake Dyno..ENJOY!

[5ABI VT]

We offer a complete kit. Feel free to contact me with any questions and for 6G member pricing.

http://www.evoperform.com/shop/index.php?main_page=product_info&cPath=660_683_684&products_id=1639

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[Grim12]

Very impressed. Can't wait to see this intake with long tubes. Makes for a nice N/A upgrade path. Intake, then headers (or the reverse). Then cams or GT350 heads/cams.

 

[steph93lx]

Thanks for all the trouble! Seem like a fantastic mod to try

One thing is very weird . Your stock intake peak et 6800 rpm. My car and about every other I seen peak around 6500. Even with long tube that's my peak. You said you put your limiter at 7600 but clearly it show 7300.

Is it possible that for whatever reason the dyno data is off by 300rpm :shrug:

But that change nothing for the result. Seem like it pick-up everywhere impressive!

Thanks again

 

[DarkSubRosa]

sub'd

 

[markmurfie]

The driveability for the most part is good, lund and i are still going over datalogs to get this spot on for his repository...other than some minute part throttle surge below 3k everywhere else is spot on

Keep us posted on the part throttle. WOT is the easy part of Tuning. Part throttle especially with IMRC can be tricky. I have confidence in Lund if anyone can get it dialed in he can do it.

 

[sandeale]

The rpm difference is because i adjuted it with the handheld not through lunds initial tune inputs and he confirmed that it causes erratic and unpredictable results i.e. the lower than expected limiter, but the new 7800 limit is coded in by lund and it does in fact pull to 7800, regarding the power peak, it baffled my previous tuner as well, because the car exhibited the same peak on a different dyno, no clue as to why

 

[sandeale]

Regarding the clutch, so far so good i just need to install a shift light because theres no layover to indicate that its time to shift, and im damn near out of usable tach

Regarding the surge, after only 1 revision he has already almost eliminated it, it still there but really faint and for a much shorter duration in each gear, he said with a little more work it can be tuned out further but probably not entirely because the gt350 exhibits this surge as well (something with the throttle body calibration)

 

[Jon B.]

Also afrs held at 11.8-11.9 through the pull

I feel like that's a bit lean at WOT. Is the car just running out of injector?

 

[Grim_Reaper]

I feel like that's a bit lean at WOT. Is the car just running out of injector?

I may be wrong, but the higher the number the more lean it is. The optimal/regular WOT AFR is usually 14.2 for my car, so wouldn't 11's be more rich?

It's always been my understanding that you want anywhere from 11-14 WOT for AFR. Unless you are running E85 where the guys have 8-9 AFRs

 

[Jon B.]

I'm referring to it as leaner than it "should" be. I don't know if they're targeting that or what, but I figured a targeted number of 10.9 or so would be where he wants to be.

 

[sandeale]

The coyote likes a rather rich afr at wot ideally .84 lamda (11.8xx)

 

[Jon B.]

The coyote likes a rather rich afr at wot ideally .84 lamda (11.8xx)

I guess that's rich for a naturally aspirated car I suppose. I'm used to my truck and being in the 10's. Nvm!

 

[sandeale]

Yeah most other n/a applications prefer around 12.5 - 12.8, which got some initial tuners in trouble when the coyote debuted

 

[Nataphen]

0.83-0.88 lambda at WOT is in the good range for the NA Coyote depending on whether you're running ethanol or not.

 

[Moddiction]

I may be wrong, but the higher the number the more lean it is. The optimal/regular WOT AFR is usually 14.2 for my car, so wouldn't 11's be more rich?

It's always been my understanding that you want anywhere from 11-14 WOT for AFR. Unless you are running E85 where the guys have 8-9 AFRs

14.2 afr is very lean. Too lean. Normally for NA you don't want to be much leaner than 12.5 or so.

11's is normally where most boosted cars are tuned to.

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