g2turbo

I seem to have some challenges getting my new car out of the hole and into 2 gear nice and smoothly. Heading back to the track for the 2nd outing this Friday, and looking for some advice.

Here is a video of my first time out, 11.5@127mph

https://www.youtube.com/watch?v=aZ_c...ature=youtu.be

Am I spinning to much out of the hole, or just staying in 1st gear too long? I've heard some guys recommend shifting around the 60ft marker.

I'm only doing 2nd gear burnouts and will be doing 3rd this next time out. 24.5x9x13 MT, at around 9-10psi. Hondata 2step setup around 6500, cutting high 1.7 60fts.

Car is making around 560whp, so i'm hoping to get into the very low 130's and get a 10 second pass.



Last years setup was similar, i went 11.06@130 but similar launch and shift characteristics. Best was also a 1.7 60'


Thanks!

sanman000719

9-10psi in the tires????

sanman000719

and yes shifting at the 60 foot marker

g2turbo

Yes, 9-10psi in the tires.

Car has boost by gear, currently set at the 18psi in all gears. I can/will lower 1st back down to 10 if that proves to help me out.

Thanks!

Turbo-LS

iTrader: (4)

Start the tires at 6 pounds before first burnout. run them at 7 psi

step two turn the boost down untill its a little to much power in first gear

step 3 fine tune the launch rpm untill it leaves best and enjoy

When you get it hooking a lot better you'll see it will want to drive past the 60ft mark vs spinning like crazy and then when going into second bogging

g2turbo

Thanks for the advice, much appreciated!

Turbo-LS

iTrader: (4)

You'll need to fine tune it and play with stuff but thats a good starting point for you to try

D0PE Ek

^ like mentioned above. Lowering boost in first gear would help imo. Watching your video on first run you shifted to soon caused it to kinda bog. It's better to let it rip little longer. then to have it, fall on it's face, causing you to lose boost. Plus practice makes it perfect. You'll have it all figured out. Keep us updated and let us know, how it goes next time out. Good luck

sanman000719

yah i was going to say he catches in 2nd and bogs lol

Turbo-LS

iTrader: (4)

Also Full Throttle shifting will help with the boost loss. simple wiring and setup in the ecu

CDecker0218

I'm having the same issue as you. From your video you are bogging gong into second gear which is why your loosing alot of MPH. After reading all the comments I will be going to the 60ft marker to shift. Its either you spin too much and hit limiter or you bog going into second. Its all about finding that happy meduim!

tepid1

You want to ride out first longer to keep the tire big. Tire size and vehicle speed determine when you shift. Not just the 60' marker. You're bogging in second because tire speed and vehicle speed are too different on the shift. When you let the tire grab in first before you shift you'll have better times all around.

VtecCarHauler

Just lower the boost in first until you see improvements on your 60ft. Deal with the bog in second gear only after you get first gear to hook (60ft). One thing at a time.

One reason it's bogging is because the car is not going fast enough in first (it's just spinning). As the speed increases in first gear, second gear will bog less because the car is moving faster (mph) and less load going into 2nd.

Easy high to mid 10's with that power. Once you get 60ft lower and consistent you can start looking at suspension settings and other things.

VtecCarHauler

Also are you pre loading the clutch? If you have twin disk ride it out a little longer off the line before engaging fully.

Ron Burgandy

iTrader: (1)

Tepid + 1.
Wait for chassis speed to catch up, don't lift on shift and you will see much improvements.

g2turbo

Thanks for the advice. I ran the car this past Friday and went 11.31 @ 126. The pass before that the car went 11.4x @123. The car just wasnt running very well, needs to get back on a dyno and cleaned up a bit.

I started at 7psi in the tires, and stayed there for the 3 passes I made. I also dropped my 2step down to 6000-6100 (down about 500 rpm from first visit).

The car responded pretty darn good, much less spinning and more linear into 2nd gear. I can still play around with this and get even better.

The car is still going 1.7x 60 fts, but so much better into second now so the 330 is better. I've lowered the boost to 10psi in first (wastegate), and then to 18psi in 2,3, &4th gear.

I've been meaning to try out the full throttle shift but have gotten mixed reviews.

I'll try to get a video up soon.

Thanks again!

extremeracer

I'm in a similar position to you, my car is currently sitting at 11.2x @ 133. I haven't pre-loaded yet or used a fixed rpm launch control strategy so hoping that will help me dip into the 10's.

The car ran a 11.2x @ 128 also, so the mph is up but I've found getting the first 330 sorted is the most important as it will run multiple 11.3 - 11.4's with lots of wheelspin but getting it into the 10's at this power level requires it to hook in the short track.

g2turbo

Here is a video of my 11.4x pass. As you can hear, the car wasnt running very clean. The following pass after this was my 11.31 @ 126, after I had added quite a bit of fuel (via Hondata)


My 1-2 shift is much better here than the first time out (first link in the thread).

We only have one more track day this year, so its probably done for the season.

rudebwoy

iTrader: (1)

This is a good thread, I have the same issue but haven't had the chance to test my options, I was in street class and forced to use DOT tires, 12.01 was my fastest time in the delsol, next year I will be on full slicks in the coupe lets see my improvement with the tips in this thread.

boosted k20

Definitely try Full Throttle Shift with Hondata. I tried it for the first time at the track last friday. My car is making 490whp on pump 93 oct. The 1st pass i didnt use full throttle shift. My tire pressure was at 8psi on 24.5x13x9 slicks. I didnt have a good 1-2 shift (bogged a bit) and ran 11.5 sec. My 60' was a 1.7X
My second pass i dropped the tire pressure to 6psi, did a 3rd gear burnout and full throttle shifted the car. I kept the car in 1st gear bouncing off the limiter a bit before shifting into 2nd. No bog this time. my 60' was a low 1.6. I did shift too early from 2nd to 3rd but the car still ran a lot better. Ran a 11.004 @ 127mph. Hook up FTS next time you go out. It helps out a lot.

g2turbo

Awesome, i'll try it out for sure. Added to the list of things to do this winter.

I was also doing 3rd gear burnouts for the first time, definitely the way to go in the future.

What RPM are you launching at? I dropped from 6500 to 6100 and it took care of the spinning and bogging into 2nd for me.

I'm still after that elusive 1.6x, do you have any videos of your passes?

boosted k20

i have videos on instagram. If you have IG whats your name. i will tag you. It wanst a video of the full pass but just the launch up to like 3rd gear.

Im launching at 6.9K and my FTS rpm is set at 7100rpms. Build about 10psi off the line.

Turbo-LS

iTrader: (4)

Full throttle shift on the hondata works great. I started using it at the last event and the boost is right there in every gear. You'll need to make boost control adjustments as the power being right there can also overpower the tires if you have to much in the next gear.

rudebwoy

iTrader: (1)

where is your activation switch? I used to have mine on the clutch pedal using the clutch switch but I have a bad habit of hovering the clutch and it was too sensitive keeps activating when I don't want it to, not I have a Gforce shifter with a switch I will try to activate it manually next time.

Turbo-LS

iTrader: (4)

i have mine setup on the clutch switch as well but took the slack out of the clutch pedal travel with the switch so the clutch pedal doesnt move from light pressure