B18C + ITB

CivicVTi · Post by **CivicVTi** » Wed Sep 29, 2004 10:38 am

Any base maps? ANy general guidelines for ignition tuning?

Silverbeast · Post by **Silverbeast** » Wed Sep 29, 2004 9:41 pm

Add timing down low...it's going to need it. Make sure you have a good vac. source for the map sensor.

Plug your ears, hold on, and pray that the car has full exhaust.

CivicVTi · Post by **CivicVTi** » Thu Sep 30, 2004 3:15 am

Adding timing down low is what I was already thinking. The question is what to do in the upper rpm range. THe engine runs on Toda Cs and 12.7:1 CR. I'll start with the ITR + JUN typeIII cams calibration for a base map. This base map should be OK. I expect to subtract a couple degrees in the upper range. Maybe more.

Silverbeast · Post by **Silverbeast** » Thu Sep 30, 2004 11:49 am

I found on the dyno that around 26 degrees timing at WOT until 9500 seemed to be the best on the car I did with almost the same setup. This was on 93 octane and in Texas heat, so... adjust accordingly. This is justr an example.

BTW, this car didnt have full exhaust, just a side exit header... i think my ears still hurt.

turbosi92 · Post by **turbosi92** » Thu Oct 07, 2004 1:46 pm

I tuned a ITR motor with ITB's and 370cc injectors (provided by TWM). Initial run was 170 and I got it to 185 just from tuning. If I remember right, it like timing around 30. The midrange increased a lot with more timing. WIth ITB's, it needs larger cams for sure (and this car needed better exhaust, header and test pipe and I think 195 would have been easy). This was on a dyno jet.

FYI, these are not fun to tune. It took 2.5 hours of dyno tuning and 22 runs if I remember right.

Super-Tuner · Post by **Super-Tuner** » Wed Nov 03, 2004 12:40 pm

How does the fuel maps with itb's differ from a log style manifold. Im just curious to see if there is any significant diffrences as like you guys have disscused with timing. Thanks