s2kseven

I'm new to configuring boost by gear. I installed a 4 ports hondata boost controller solenoid. The installation was a breeze and connections were done correctly. The solenoid clicking. I'm using flashpro.
At first, I put a value of 40% in duty cycle, the boost comes so fast and hitting the boost cut too so early like pinning you down in your seat. I hate it!
Someone told me to put a 0% value on all the column of the duty cycle, to find out if my solenoid is working properly and I should not hit the boost cut on 0 %. Sure enough no boost cut, I can only go a little over my wastegate spring of 3 lbs. I knew that my solenoid is working.

The reason i want boost by gear is because my car is so light (1,300 lbs) and to dump all the power at 1st and 2nd is impossible to hookup, dangerous, i can't handle it. Now, I like to guess on the value and try this value below:
Can i put 5% duty cycle in 1st and 10% in 2nd and the 3rd is 20% all the way to 6th gear?

Someone who is good in boost by gear, please give me some insight.
Thank you!

boosted94gsr

s2kseven

Thank you for your reply.
I did not change the hertz value from the original flashpro, it was still 33 hertz.
I like to try 25hertz, can you kindly explain what will I expect and the behavior once I change it to lower hertz.
So when I test it again, I will be able to tell you.

thank you

boosted94gsr

s2kseven

Ok, I will try that value and play around with the duty cycle.

Thank u

LightningTeg

You need to set the program to fixed duty cycle and find out what DC% = Lbs of boost. That should plot a line you can use to judge what gear can handle what boost pressure.

s2kseven

If I put it in fixed duty cycle, then how can I find the percentage of the duty cycle under boost?
I can see the boost but not the duty cycle.
You mean, do a datalog?

LightningTeg

Like put it at 5%, go do a 3rd gear pull, datalog and see how much boost it was. Say it was 4 lbs. So 4 lbs of boost is 5%. Then put 10%, do another pull, log the boost and see where it was etc. Eventually you'll have 5%=4lbs, 10%=5lbs etc etc and you can input the duty cylce in the boost by gear table to whatever your preference

boosted94gsr

ls joker

4port solenoid are alot more aggressive than a 3port. I went thru the same issue last year. The higher the frequency, the bigger the jumps in pressure. Aswell as the solenoid being more unstable or inconsistant pressure. The lower the frequency, the more stable the solenoid will hold pressure. Aswell as keeping in mind cold temperature spikes.

flashpro boost control arent as full of options as s300. Unless they updated it. I helped setup boost control for an 8th civic with 4port last year aswell. I do agree also, when tryin to figure out your pressures, to start with the fixed duty cycle checked at low duty cycle. Depending on size of the turbo and desired pressure, once the solenoid start to work, id go up 2-5% percent at a time with 20-25hz.

on my 4port, i am setup 40% duty cycle boost by gear by rpm, at 30hz.
temps about -2,0,2,3

s2kseven

ok, now I understand from all your explanation.
It was raining so hard yesterday and I was not able to test at 25hertz and start at 25% duty cycle. I will keep note on this values. I will consider fixed duty cycle approach too if I get lost.
I will keep you posted

thank you so much!

s2kseven

I got lost using boost by gear so I used "Fixed duty cycle" approached.
First, I changed the hertz to 25 Hz, then I entered 0.5% on all the table under duty cycle.
At 3rd gear I can go to 9psi of boost. That's where I want to be. However at 4th and 5th, it cannot go any farther than 9psi.
Can I increase the 4th & 5th to 10% duty cycle?

Later on, I will fool around on 1st & 2nd and lowered it to say 0.4% duty cycle?

thanks - I'm getting there.
Also, yes by bringing down the hertz from 33 to 25 is less aggressive ( which I like)

LightningTeg

If you have a 3psi spring you will not acheive more than that. The general rule is you typically cant do more then 2-3 times what the spring is rated for.

boosted94gsr

LightningTeg

I noticed this too and you can actually see it in the dyno (between 7lb spring and 15lb spring)

s2kseven

Yes, I have 3.5 lbs wastegate spring.
So, I raised the duty cycle of the 4th & 5th gear to 10% and I have no problem going 11 psi. I bet if I raise the duty cycle to 20% I might see 12 to 14psi which I don't want to go more than that.

Here is my last question, after I'm satisfied on the setup of the duty cycle, can I now change from fixed duty cycle to boost by gear selection?