I want to know what is the best area to start vtec engagment point. I have skunk stg2 cams on a built lsvtec w/ 12.5:1 compression. Everytime i go into vtec it seems to cut out or kind of bog and doesnt feel like it pulls till i get past like 7k i set vtec on my vafc to come in hi-lo 6k and lo-hi 5900. any suggestions on what would be a better setting. Just trying to get the engagment a little smoother transition. anyhelp i will be going to dyno very soon but want to see what i can try for now.

 

take the vafc and set it up to the highest setting (7000 i think) then lower it by hundreds after every pull. then when the power band becomes smooth and doesnt bog you have found your vtec engagement point. i suggest you get it tuned on a dyno due to changing the fuel can also change the rpm it is needed. but for street tuning thats how u do it. by the way how do u like ur lsvtec im actually building one with je 12.5's right now and finally someone has a similar setup to what i want to run.

 

Try 6000 rpm. I had a crazy *** bog around 5400 and then the cams kick in.....So I adjusted them to 6000 and it was pretty smooth after that.

 

I love the setup i dont know why took me so long to do this. car runs good and plugs look perfect im running some ngk7's right now and they seem to be doing the trick. another question do you need to set low-high a little seperated apart like for instance 5600 and high low 6000 or how would that work. or do you want them like right next to each other like what i had it set at 5900/6000

 

I've got JUN III's, 12.2:1 comp, in an ITR motor. My VTEC is right about 6, actually it's a tad over. I notice what you are talking about when I had my cross over at about 5500 which was ****. Once I bumped it up, everything was happy-

 

I had JUN 2's and 13:1 CR in an LS/VTEC a while back-- the best way to do it is to get it on the dyno. You're not going to be able to "feel" what's best for the car. Before I dynoed mine, i put it at 5400rpm, which made it feel like it hit the hardest, but the reason why is becuase the non-vtec lobes had started losing power and torque at 5100, making the jump feel better. Dyno revealed it should have been at 5200.

 

thanks for the info i guess will be going to dyno in acouple weeks then to get this taken care of