Bseriescivic5

Hello all, I just recently got back out to the track after several years and trying to get car dialed in. So just a quick run down of setup and then my question.

SETUP:
93 cx hatch, stock suspension
b16a2 (bone stock, has ARP headstuds)
full race ram horn
tial 44 gate
Holset HE351cw (60mm)
s300
ID1000
GSR trans, LSD
Stock 205/195 tires
Jeff Evans tuned- 330whp/200tq at ~12psi

Results:
pass1: 13.6 @ 109
Pass2: 14.0 @ 110
Pass3: 13.3 @ 110-111, cant remember exactly

60':
All pretty shitty, my best was 2.2-2.3 ish

Ok, so obviously I need better tires..... final pass we took a bunch of air outta them and picked up a half second, as well as I started getting use to car and drove better. Now my question is in terms of s300 and boost by gear. My plan is to start tweaking it a bit to see if I can get a little more boost in 2nd, and ramp it up a few lbs in 3rd and 4th. I think 1st gear is fine (5psi, and on two-step i get like 2lbs maybe, hard to tell on boost guage). Next time I go out, I will be using 22" slicks, so I think i need to make some adjustments to fully benefit.

So how do I make adjustments to the boost by gear option in s300? Obviously I have to be connected to car right? the values dont make sense to me at the moment, looks like its all based on duty cycle so there is some trial and error that needs to be done to get exactly right? any guidance would be much appreciated. I have uploaded screen shot FYI

Thanks,
Greg

luck4rmkc

iTrader: (2)

First step is dialing in your pressure vs duty cycle values.

Then use the boost vs rpm vs gear table to bring in the boost as you see fit depending on what the car likes and ability of the track to hold power.

IMO invest in some slicks ASAP.

Bseriescivic5

Absolutely, I have acquired a set of 22" that still fit hubs with the standard studs. But im worried with the current boost settings, car might fall on face with the increased traction. Ill look into your suggestions. THanks

Bseriescivic5

Also, what is the best approach to dialing in pressure vs duty cycle? is this just trial and error? or is there a more analytically approach? I dont have a dyno, just test and tune at track, but wanted to at least get an idea of what im doing first before wasting time understanding at track.

Also, since season is almost over, would you guys suggest just having Jeff Evans do it for me? or is this something I can play around with on my own? (Car is tuned up to 15psi, so in theory im not changing tune, just adjusting boost delivery)

THanks, and sorry if these are trival questions

SPOOLINmatt

i find it MUCH MUCH MUCH easier to do a little testing and use duty cycle only and kinda know what percent does what and go from there. That pressure reference table blows.

Bseriescivic5

So basically just play around with the duty cycle only in that Pressure vs duty table, then make a pull and see what the data log records for boost in each gear? Thanks again guys.

boostedteg4dr

to set up your DC table use FIXED DUTY CYCLE.

1)Set the duty at 20% make a pull in 3rd gear.
2) data log your boost psi.
3)Input your finding in the look up table

4)test with fixed duty of 30, 40, 50, 60 etc

boostedteg4dr

to set up your DC table use FIXED DUTY CYCLE.

1)Set the duty at 20% make a pull in 3rd gear.
2) data log your boost psi.
3)Input your finding in the look up table

4)test with fixed duty of 30, 40, 50, 60 etc

nonvtecallmotor

Bseriescivic5

Sweet, thanks guys im slowly figuring it out. still on street tires doing the changes, so wont know for sure if I have it just right for the slicks yet. Ill keep playing around with it. Right now its 5psi 1st, 10psi second, 14 rest of way....

SPOOLINmatt

When using duty cycles, the reference table is not even active. It's all based in what duty cycles you put in the gear x rpm table.

dpetro1

i dont think that most responses took into account that you already have bbg setup. are you just trying to increase the psi in each gear? if you are tuned on 12psi, why are you running 14psi? that may not be safe

also your screen shot doesnt appear to match your current bbg settings. the psi vs duty cycle table shows a much higher pressure at 58 duty cycle, yet you claim you are getting 14psi

boostedteg4dr had good advice. get your fixed duty cycles correct but be careful not to overboost for what the car was tuned for. keep it low and increase slowly. better safe than sorry. once thats good, you can input the duty cycle values in the bbg table

D-Rob

Yes, please just use the solenoid duty option.

Makes life a million times easier than a target.

luck4rmkc

iTrader: (2)

Agreed fixed duty cycle is the easiest way to determine what boost level is yielded by what duty cycle.

Bseriescivic5

Yes, sorry for the confusion guys, that screen shot is from before I started playing with the settings. Jeff tuned me up to 15psi, but pulled it back down to 12 when finally dialing in the bbg stuff. Do you guys think i should stay at 12psi max? it was my understanding the tables are still good up to 15. is this correct?

Garage 808 Hatch

why are you tapering off boost up top? does your setup creep? I usually add boost in after peak torque and up the rpm range

Bseriescivic5

Honestly, I dont know. The screen shot I posted is directly what Jeff Evans did and I posted in here to get some guidence as to how to change the delivery of boost for each gear. When I made changes (still need to upload new screen shot), I opted to use the fixed duty cycle as everyone has pretty much told me to do.... Im still not quite sure I got this right, but I was able to make a pull and see that boost is definately up in second, and also that I have increased 3rd and 4th to about 14psi total.

Garage 808 Hatch

put slicks on it and just run 14psi in every gear. It'll be fine

Tippyman

I concur. I made 378 in a very light car and use 23" slicks. Full boost all the time, 1.6x 60ft's, no spinning. I launch at 6500 with 13 lbs of boost on antilag.

Bseriescivic5

I hear ya guys about just running max boost in all gears, have not fooled around with car in a few days, got finals this week and next to finish up my Masters program. Are you guys on stock suspension though? Im a little worried, coming outta the hole with 14psi right off the bat.... and im still on STOCK suspension.... Also, my anti-lag will not build more than 1-2psi on the line, so im wondering if im going to bog down on the launch.

Ill play around with it some more and let you guys know. THanks again for all your help!

Tippyman

Sounds like your antilag isn't set right. What rpm is it at?

Bseriescivic5

It looks like its set at 4400. Should I raise this? The turbo is rather large.... 60mm compressor inducer, has a 9cm turbine housing, not sure how big turbine wheel is

Tippyman

I have a rather small turbo (.63 ar 50 trim) so i cant speak for your setup, but i launch at 6500 and it makes 12-13 lbs off the line from what i remember. 4400 is really low, especially if you plan on running slicks.

Bseriescivic5

Yea, thats what I am thinking. Im going to track this Saturday, weather permitting so I will see what it does with the addition of slicks and the modified boost settings. Thanks guys, I will post up the results!

Garage 808 Hatch

youre probably going to need to leave at 5500 or higher depending on slick size