it's a weird/low torque curve...any suggestions as to why? gsr obd1 longblock and trans..2000 si wiring harness and ecu...guess that 70 mm tb is hurting as to why the low torque number...at one point i make more tq then hp??
any suggestions/comments?

where i dyno'd (IL)
http://www.automotosports.com/




[Modified by Y2K Si FBP, 10:00 PM 5/20/2002]

 

few things.

1. resize thatthing
2. lets see the a/f ratio.

 

sorry about the size...and i don't have the air/fuel ratio...it was running really lean like 18-19:1...so we did a quarter runs (added more fuel..then stopped & added more till the air/fuel looked close) like 12-13 run to get the air/fuel any other suggestions/opinions? what torque numbers to lightly modded c1's produce?

 

see all that torque you lost down low... I'm no tuning expert but i'm guesing thats from the skunk2 manifold. You'd be supprised how much the dual runners will help on the stock manifold.

 

i dont think the torque looks too bad. You lose a lot from the throttle body / skunk2 manifold.

 

your problem is that ecu, I would be willing to bet you would see ALLOT more gains with a chipped p28/72.........obd2 majorly sucks

 

i put down 155whp and 119.4lbs of torque with nothing but an RSR exhaust, act clutch, and a fidanza flywheel

 

I think some tuning could help you in the HP curve. The torque looks good though. Do you have ITR or aftermarket cams?

 

stock cams..stock compression...just everything listed on the dynoplot as for mods...forgot b&m fpr

 

what is your fuel pressure set at (line off and pinched) Also is your vtec at the stock engagement ie 4400 or did you move it up.

 

line on..33 psi..off 43 psi...vtec was at 5300 via the vafc...hence the big dip...the vafc is adding 23-30% +fuel from 5500 rpm and up...runs really lean witht he b16 si ecu

 

thats huge -- you have the dyno plot?

 

anyone else any comments or want to share #'s?

 

what mods?

 

how much did it cost you for dyno time? id definatly be willing to head down to IL to get one one. dont think there is on even in milwaukee. im prolly wrong but never heard of one

 

mods are:
aem cai for 2000 si 2.5"
dc 4-1 ceramic header for gsr
rsr exhaust 2.375 til b pipe..then it's 2.5
skunk 2 IM
bbk 70 mm tb
apexi vafc
b&m fpr with guage
magnecore 8.5 mm wires
act clutch full face hybrid lining disc
type r flywheel
94 gsr longblock and trans...running 2000 si ecu/wire harness...had to add tons of fuel via vafc 20-30%
has check engine light..last checked to be bad 2ndary o2 (heating element)

 

Get a VAFC and tune your car with that. It'll smoothen out your Power curve and you'll gain even more.

 

If you are adding 20-30% fuel, that sounds like Way too much! Make sure all of your sensors are OK, and everything else is Kosher, INjectors, etc. Thats like moving from a 240cc injector to a 310, mostly used for turbo apps or major NA mods..

 

it's still stock si computer..the air/fuel was like 18-19:1 with the VAFC set to zero...it ranges from 20% at 5000 to about 29% at 6000 rpm and drops back down to mid 20% 7000 and 8000...a gsr ecu ignition timing curve is LESS agressive then a b16 curve for emmisions reasons...flowing air for a well breathing 1.8..but still a 1.6 obd2 "sucky" ecu

 

also u said something about a bad o2 sensor code, this will cause the ecu to run in safty mode, causeing a good loss in power, get an obd 1 ecu!

 

i hit 159whp/118ftlbs with an injen intake/crappy exhaust setup