i have a ques
i was wondering where the best vtec engagement point or where i should set it its a 97 GSR with the following mods

aem cai
comptech header
apexi n1 cat-back
aem pulleys
apexi VAFC

what do u guys think i have it now to engage at 5200 and shut off at 4800
give me your opinon

 

Leave it at stock unless you have internall work. Or better yet, take it to a dyno and play with it to get the best settings.

 

stock
its there for a reason.

 

I think part of that reason is gas mileage. Hopefully someone can post up some plots, but I woulnd't be surprised if lowering it 600rpm even on a stock car would yield higher power on the big cam then the little cam. Plus, on a GS-R it would give you the ability to easily stay in VTEC between shifts.

 

My friend has a bunch of mods on his ITR, including the VAFC. Anyway, he had his car tuned on a dyno and by lowering his VTEC point by 600rpm's he gained 10hp. HHMM.....

 

but stock is 4400 and it doesent feel good if i have it set at 5200 and shut off at 4800 i cant get it to stay in vtec between shifts and it feels better
4400 feels like garbage

 

Stock is not 4400.... Don't confuse the sound of the secondary intake butterflies opening with the sound of VTEC engagement.

 

I think a dyno run would answer this best.

 

stock is 4400 and the butterflys open at like 5700

 

yes it is
butterflies open at 5700.

 

BAM

 

best vtec engagement? answer: tuning

 

first best thing is to get it dyno'ed/tuned & set VTEC engagement according to the best dyno mapping as possible.

other than that, leave it at stock engagement.

 

get your car dynoed and tuned is the best way to determine where you should set your VTEC engagement. I recently had my car dynoed and tuned at skunk2 and after 2 days of tuning, I was able to make 181.31/127.40 to the wheels. My VTEC engagement is set at 5200. (motor: B18C1)