Thread: Quick Pull w/Gen V on e30 tune

I decided to go back and do an e30 tune now many may think my tune is a bit crazy but i am running e30 setup currently and i love it.

Power was there once that e85 mixed in and started to feed but im still playing with the tune. Tonight i decided to go WOT on the tune that i edited and pulled an 11.2 AFR and as it got towards 5200rpm range it began to climb to 11.8 so i want to play with that later but for now its running

DHP tune by me
19* of timing
11.2-11.8AFR as i explained above.

3.4 Pulley
Gen V
Northstar setup w/LQ4 Maf
Speed daddy headers
1.9 modded rockers
STOCK injectors l67s so #33
Cars a GT so stock fuel pump
Bully Flo heads
#90s
E30 setup
3.29s
Zzp 3" catback no cat
Innovative MTX-L wideband

I have a 3.3 but i wanna get the timing up first before i switch and and KR fixed. Im seeing 3* before shift which is where it leans out to 11.8

One day ill get the time to throw in my IS3 cam but need more parts first. Anyway thats all.

https://youtu.be/LwVuALY0qN4

Whats the your injector duty cycle like on this setup?

I can only guess that you are pretty much maxed out around 90-95%.

Otherwise if everything else works, it's cool by me.

scan IPW injector pulse width. if your over 20,000 your about maxed out, i was hitting 22,000, on 93 gas with a 3.2 pulley. installed 42's i hit 15,000 now.

You can use a calcuator to bring the large number into a easy to use number.

Think of 15,000 or 22,000 just as 15 or 22 for IPW, for whatever reason DHP does it different or doesn't have "Injector Duty Cycle" has a PID you can log.

The MAX IPW you want to see is 19-20 on stock injectors, you likely hit your highest fuel flow rate at your shift point because the engine is spinning the fastest there. So if you saw 19-20 that is equal to around 90% duty cycle and pretty much out of fuel injector. I've seen people go further like scotty to over 100% duty cycle and still have an engine but that's playing with fire.


Just a few rough examples, at 5800rpm shift with 22 IPW that's over 105% IDC. 6,000 at 22 IPW is 110% and 5800rpm with 20 IPW is around 96.67%.

http://gtsparkplugs.com/Injector_Duty_Cycle.html

L67/L32 same injectors.

L67's are 33's are far as I was aware.

Originally Posted by Casper00693

Its like a debate now over stock injectors lol... X2 that blueguy

Either way, 42's will give you enough headroom for much more play.

I was running 42's on my GenV setup with a stock cam/rockers...mid 11's AFR with 17-18* and a 3.2" pulley. All the car had was an intake, ported TB/LIM, and a 3" catless downpipe. Ran pretty damn good for a stock valvetrain car.

https://www.youtube.com/watch?v=sVEpT11IBMg

You are out of injector if you are at 20 IPW at 6,000rpm.


Even at 20 IPW with 5,800 rpm is already 96% duty cycle, being at 6,000 rpm means you are at 100% duty cycle and way out of injector play room. Time to upgrade for sure.

Originally Posted by Casper00693

Was that on e85 by chance? Assuming by the mod list you just told me about? I truly want 60s or 65s w.e... But for now i can get 42.5s cheap if i go 42s ill just do a e50 tune. I like 100% e85 but i never seem to get the tune where i want it mor feel the power i should so im liking the mixture for now.

Yup, 85.

E30 wasn't near enough to get me where I wanted to be.