Getting bosch 1600's to idle

[mark4g63t]

Been having a little trouble getting my car to move more than a foot before dying. lol. If anyone has any advise for me here's the link to my logs http://www.dsmlink.com/forums/showthread.php?t=77050 This is on 92 pump as still have a little less than a quarter tank before I can switch to e85. I have one question however. Would switching to e85 raise my Injector pulse width? i'm at 1.5-1.6ms and read I should be more around the 2.0ms range with these injectors.
Thanks, Mark

[mark4g63t]

Got her running on corn, posted a log on the link forums as it's an invalid file on this one. let me know what you think. CombFT is high any suggestions?

[Pushit2.0]

up the injector dead time to, A LOT, or get a set of 1200cc injectors that are made to work at low injector pulse width....

[mark4g63t]

Ok and that should bring my CombFT down? Would that also bring my STFT Low down?

[mark4g63t]

Put another log up on link forums. Added some deadtime and played with the MafComp and got my fuel trims down to hover around zero % during idle. I will go for a cruise after work and post that log up. Got some BR7ES's that I was planning on gapping to .028. Was wondering what you guys would recommend for timing and a/f ratio? I just set it quick to 12.0:1 Should I go leaner?

Loving the sweet smell of corn!
Thanks, Mark

[Halon]

1600's are somewhat of a pain on pump gas. E85 helps a little bit for some reason, but still I was always tweaking them to get it to idle decently. Any car that I care about idle quality, I will never put a set of those in ever again. I could get it to idle decent, but 2 weeks later things would change for whatever reason and I'd be in there tweaking, which I'm sure screwed up the rest of the tune. No thanks, but good luck.

[mark4g63t]

Yeah, they're definitely harder to get fuel trims in line than compared to my last injectors (650's). E85 did help a lot as before on 92 octane my car wouldn't move more than a foot before it would die. After I put in the E85 I was able to drive around the block with only global and deadtime adjustments for the fuel change.
I don't have a problem tweaking things every now and then as I always drive with my computer (car has been more than unreliable lol)
What would you suggest I set timing to? I've heard that E85 requires a little more timing advance than pump gas does.

[Halon]

You mean timing at idle, or in general? I'm pretty sure at WOT I was running a max timing advance of around 17* on my 62mm setup. Anything higher than that and the dyno showed no significant gains, so there was no sense in running any more aggressive numbers than that.

And yeah I had my computer in the car all the time as well. After a couple years of constantly having to tweak the tune, I got tired of it. Probably also didn't help that I had all the idle control stuff removed from the TB as well. I eventually put an ISC back on which seemed to help a little.

[turbotalon1g]

My old 1600s would just have the classic miss/hiccup to them. I hated it and got rid of them, but apart from that slight miss they were perfect.

Back then I wanted my car to be as smooth as a caddy though.

[Tachyon]

I also hated my old 1600's. They were a CNG injector that Percision had re-branded. Their minimum pulse width was too high for my batch fire setup.

When I switched to 1150's my MPG leaped up because I could hit the low PW's I wanted at cruise/idle.

12:1 AFR is usually fine. I typically go a bit richer as E-fuel is seasonally dependent and it's nice to have a little buffer during the E70 to E85 changeover... (or just be logging all the time, like an OCD motherfucker).

I would also set your timing artificially low until you can get on a dyno. With a 2g head, guessing reasonably normal static compression, somewhere around 10* during peak load. Every setup is different and you really need a dyno here or you're playing with fire.