This is following up my previous thread: https://honda-tech.com/zerothread?id=334155

A couple of weeks ago went to LACR (Palmdale, CA):

Setup is 1992 Civic VX Hatch
B18C1
Injen CAI
JG Header 2.5'' Collector
Carsound 2.5'' High Flow Cat
2.5'' Crushbent Piping, 2.5'' Thermal Straight Thru Muffler
M/T 20x8x14s

Had 9-10 passes...hittin mid 14s. Fastest time was 14.45 and slowest I believe 14.6-14.7...don't really remember. 60 fts were all 1.9s.

Tonight went again. Same setup except 2.5'' exhaust cutout now installed. Also, thermal was replaced with stock like muffler, smaller inlet for noise purposes on the street...but that doesn't matter as i'm pretty much open header from the cutout.

Only got one run in because it was so damn crowded. New time?

60ft: 1.95
14.23 @ 94.08 MPH
sea level corrected: 13.77 @ 97+MPH

I'll go again maybe next week...try to get in a lot more runs in.



-Rod

 

nice!! i have 2.25" piping with a stock *** muffler for the same reason u do. I hate the damn cops!!! but i was going to get 2.5" exhaust and muffler w/ resanotor...and the whole nine yards. but i just might try out the cut out. i have ran open header at the track b4 and it seemed like it didnt help me out that much. good job though...

 

damm nice improvement. were your first times corrected for sea level?



[Modified by Dominican_Kid, 1:45 PM 11/16/2002]

 

dude nice job. i think i'm going to be out there next week, but sure thought. depends on whether my parts come and we decide to start the turbo install.

wish i could've gone, but the budge job we did adapting the cx exhaust to the b18c1 finaly showed when friday morning i hit a speed bump and it somehow got knoced down, dragging along. cool!

BTW: Friday's suck for getting runs in. Go on wednesdays, you can get 10+ runs in.



[Modified by Ruckus138, 4:19 PM 11/16/2002]

 

Oops...no..those first times are not sea level corrected. Altitude corrected time for the fastest one from a couple weeks ago (14.45) would be a 13.99.

I got in ten passes and the 13.99 was the best. I only ran once Friday night and got 13.77. I'm sure I could have gotten a tad bit lower if I was able to get more runs in.

-Rod

 

 

are you sure the times are better due to the cutout and not just possibly cooler temps..since you did say a few weeks ago.

I know here in Texas, just a few weeks ago we were still in the mid 90's..ha. Today it was about 60.

Nice Job anyhow..

 

Ur right...there would be no way for me to prove it wasn't the track conditions. But, a couple of weeks ago...it was a lot colder. I remember it eventually rained that night too.

It was cool friday also. I guess when I dyno the car again...that'll be when I know for sure.

 

you heading to import builders for the dyno? i'm going out there to have my hondata tuned, soon as this hairdrier gets slapped on.

 

please post complete timeslips of the before/after......and slicks pressures

 

UNCORRECTED TIMES

Before (fastest out of 9-10runs):
Reaction: .972
I1: 1.979
I2: 5.926
I3: 9.205
MPH (I3): 75.244
I4: 11.956
ET: 14.455
MPH: 93.136

After (one and only run):
Reaction: .812
I1: 1.959
I2: 5.790
I3: 9.028
MPH (I3): 76.263
I4: 11.758
ET: 14.230
MPH: 94.086

Slick pressure for both before/after: 12.5psi

-Rod

 

if you'd only made 2-3 runs after changes..............

Seems traction was better on later run, but the MPH increase, no one can agrue that.

 

Open header rules

I have seen a 2-3 mph increase as well as a 1.5 tenth reduction in ET consistently over my 2.25" exhaust system.

Its free.....5 mins to do......worth the effort.

 

Well I'll be on the dyno soon for Hondata...so I'll know then what kinda whp increase if any.

-Rod