hey..

Here is my dyno sheet.. I want to know why i have a flat spot from 6000 to 7000 RPM..

one is before tuning and the other is after.. (only in the CHIP)




Here are my Mods if it helps

B16A

Short Ram AIR
70 mm BBK TB
Skunk2 Intake Manifold
Crower Stage 2 A cams (springs and Ti retainers)
.030" off the head (around 11.1:1 CR)
ANR Compact Header
2.5 " Exhaust With a little High Flow CAT
DH-Racing Pulley (6 oz)
AEM Alt Pulley
9.5 LB Flywheel
Quiafe LSD
MSD Ignition
NGK #9 Plugs

What do you think would cause that dip??

 

Whats it tuned with?
Whats the AFR in that region?
Whats the timing in that region?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Muckman &raquo;</TD></TR><TR><TD CLASS="quote">Whats it tuned with?
Whats the AFR in that region?
Whats the timing in that region?</TD></TR></TABLE>

 

the AIR/Fuel is pretty close to be the same about 13 to 13.5 from 5000 to 9000

timming is stock on the dizzy.. and advanced about 10 degrees in the ECU from 5600 to 9000 (the same)

the line that it is very close to is 13:1

 

anything??

 

Cam timing?

My car flatlined from 5500+ To redline, because my cam timing is off..

 

what do you mean by cam timing??

the cam gears??
or ignition??

 

gears

 

i have the intake at +2 and the exhaust at 0


i did a dyno last year. and it didn't have that flat spot...

i changed to obd-1 from obd-0
went from a jun stlye header to the ANR Compact header
from the stock flywheel to a 9.5 lb
added a quiafe

from that didn't change much..

 

10 degrees? holy **** thats alot.

 

up

 

i would take out that ad in your sig if you cant get your own motor to be tuned properly, lol. other than that try a different map in that area.

 

the maps are fine...

i ran 25 pulls with diffrent maps, all had the same line from 6000 to 7000

i'm sure it has to be something to do with the hardware..

Also it looks like no one knows here on honda-tech..

 

its the cams. those are the crowers with the stock primaries. Ive seeen another b16 with that problems and those cams. The reg 402's dont seem to have that dip.

 

last year, same cams, no DIP!!

here is last years..




Modified by crxsirvtec at 12:35 PM 6/1/2004

 

to get rid of that dip on the b16 i was referring to, the tuner had to raise the vtec engagement to almost 7,000 rpms! Not good

 

my first guess would be ignition timing... second cam timing... you have the head milled... did you compensate for the milling w/the cam gears?

 

yes it has to be timing, if you look on the old dyno sheet and the new one, it looks like the flat line on the new one and hump on the old one are in pretty much the same spot, so depending on the timing it could do one or the other, youll just have to find if its the cams or distributor, but my money is with the cams

 

if i set vtec at 6700, would that work good??