|
Author
|
Topic: Analize my dyno graph...PLEASE
|
cobra status
¯
Member # 571
|
posted
 
 
I'd mostly like to know why the A/F ratio so different between the runs. Where should it be? Stock run was pretty low.
Mods on red pull: K&N air filter
Mods on blue pull: K&N air filter, magnaflow X w/cats, FR500 cat back, WMS cold air to TB, stock MAF
http://www.modularfords.com/forums/showthread.php?t=11837
--------------------
2001 Mineral Grey Cobra Coupe
Posts: 96 | From: East Bay | Registered: Nov 2001
| :
|
|
BlackNGold
CaliforniaFords.com
Moderator
Member # 655
|
posted
What was the engine temp on both runs?...If your car was cold it will run richer...
It looks like you're running too rich and could gain some hp just by running a little leaner... ![[patriot]](graemlins/patriot.gif)
--------------------
-SLOWER TRAFFIC KEEP RIGHT-
Posts: 5132 | From: Bay Area, CA | Registered: Dec 2001
| :
|
|
cobra status
¯
Member # 571
|
posted
Is the red or blue line too rich? I'm not sure on the engine temp. It was about the same I'd bet. Would a MAF help lean me out?
--------------------
2001 Mineral Grey Cobra Coupe
Posts: 96 | From: East Bay | Registered: Nov 2001
| :
|
|
JoeT
¯
Member # 298
|
posted
only problem I see is the car richening up at 6k, anywhere between 12-13 A/F is probably good, every car is a little different for max power, you can see how you made more power closer to 12.0 than 13.0, by nearly 10 HP.
also looks like an unstable ignition or something with that ragged dyno graph, running rich past 6k probably cost you some HP as it happens right at your HP peak
--------------------
1984 Ford Tempo AOD--- RIP
Posts: 6785 | From: San Jose | Registered: Jun 2001
| :
|
|
Mean2001GT
¯
Member # 1750
|
posted
the blue line actually looks really good. a great afr is 13:1. that is usually a good number to get good performance, but still keeping it safe. a mass air may lean that out...but you don't want it much more lean that that. i would get a mass air however, and then get a custom tune to make sure that the afr is perfect. you will see and feel a noticable difference in power and throttle responce with a tuned car.
--------------------
--Silver 2001 GT--
13.020 @ 110.46
340.2 rwhp
339.8 rwtq
Posts: 158 | From: San Ramon, CA | Registered: Aug 2002
| :
|
|
dynolabs
New Member
Member # 4424
|
posted
Data logs would provide useful info here. The dates of the runs are far apart. The adaptive learning mode of the EEC-V may have caused a gradual change in long/short term fuel trims. This affects WOT (wide open throttle). Also. data logs provide info on what your 02 sensors are doing, MAF voltage, fuel trims, ignition timing, IAT (intake air temp), ECT (engine coolant temp), etc....... in most cases the mods you bolted on should have been adequately compensated for by the EEC-V. Custom tuning (SCT) will improve performance. Typically, the MAF transfer function is fine tuned resulting in a crisp throttle response and power/torque improvements across powerband.
--------------------
Dyno Labs, LLC
SCT Tuning
San Ramon, CA
(925)831-8240
info@dynolabs.net
Posts: 5 | From: San Ramon, CA | Registered: Apr 2004
| :
|
|
cobra status
¯
Member # 571
|
posted
quote:
Originally posted by dynolabs:
Data logs would provide useful info here. The dates of the runs are far apart. The adaptive learning mode of the EEC-V may have caused a gradual change in long/short term fuel trims. This affects WOT (wide open throttle). Also. data logs provide info on what your 02 sensors are doing, MAF voltage, fuel trims, ignition timing, IAT (intake air temp), ECT (engine coolant temp), etc....... in most cases the mods you bolted on should have been adequately compensated for by the EEC-V. Custom tuning (SCT) will improve performance. Typically, the MAF transfer function is fine tuned resulting in a crisp throttle response and power/torque improvements across powerband.
Wow, I think I caught most of it. ![[Eek!]](eek.gif)
I'll be getting a MAF and a tune when I get the money.
--------------------
2001 Mineral Grey Cobra Coupe
Posts: 96 | From: East Bay | Registered: Nov 2001
| :
|
|
ci$ko
¯
Member # 2425
|
posted
needs higher #s ![[Wink]](wink.gif) ![[Big Grin]](biggrin.gif)
--------------------
2000 GT for sale
89 lx burning up slicks at a track near you
91 bottled gt sold :/
72 chevelle
Posts: 1286 | From: valleJo .7o7. | Registered: Feb 2003
| :
|
|
cobra status
¯
Member # 571
|
posted
quote:
Originally posted by dynolabs:
Data logs would provide useful info here. The dates of the runs are far apart. The adaptive learning mode of the EEC-V may have caused a gradual change in long/short term fuel trims. This affects WOT (wide open throttle). Also. data logs provide info on what your 02 sensors are doing, MAF voltage, fuel trims, ignition timing, IAT (intake air temp), ECT (engine coolant temp), etc....... in most cases the mods you bolted on should have been adequately compensated for by the EEC-V. Custom tuning (SCT) will improve performance. Typically, the MAF transfer function is fine tuned resulting in a crisp throttle response and power/torque improvements across powerband.
Wow, I think I caught most of it.
I'll be getting a MAF and a tune when I get the money. Thanks!
--------------------
2001 Mineral Grey Cobra Coupe
Posts: 96 | From: East Bay | Registered: Nov 2001
| :
|
|
cobra status
¯
Member # 571
|
posted
[ April 22, 2004, 11:47 PM: Message edited by: cobra status ]
--------------------
2001 Mineral Grey Cobra Coupe
Posts: 96 | From: East Bay | Registered: Nov 2001
| :
|
|
|
Email this post to someone!
Printer friendly view of this Ford topic
