Thread: Dynoed My Car Today!

oh lol gotcha

No!

Anything richer than 12.0:1 is too much fuel. If you have to do it to keep the engine alive, "you're doing it wrong". (But we already knew you were doing it wrong from the beginning. I like your lower boost plan.)

Leaner than 12.2:1 is trouble.

i personally do not know a single person that tunes for 12's up top on a turbo application when running anything more than a farts worth of psi through a turbo. Whether they are self tuners or well respected professsionals. Not one.

there are obviously an awful lot of people "doing it wrong" in the eyes of Ben Fenner

There certainly is.

You're also wrong about the professional/amateur tuners. Tuning to 12.0:1 on high boost applications is common enough. I understand most shops will not send a car out like that because their reputation is on the line, and they've heard rumors/can't trust the kid with the car to not fuсk it up down the road. They know they will take the heat for that. You can be damn sure they tune their own cars to 12.0:1 and the amateurs follow suit with great results.

All of the advice I've gotten from tuners I trust have recommended what I said for modern DOHC boost friendly engines.

Hell, even older SOHC engines with poor anti-detonation head designs should be tuned to 12.0:1. I've done it, and I hold the US record on pump gas for that engine partially due to that. Engine was daily driven on 21 psi, GT35 turbo, etc. etc.

It's called over fueling, and it's a band aid at best.

You know me. Or do the interwebs not count?


I'm not trying to belittle you kieron, but it seems to me like you're stuck in the world of controlling detonation with fuel. Sure, it can be done, to an extent, and it's certainly cheap and easy, but detonation is much better controlled with ignition timing (as I'm sure you know). Maybe you've been hanging around the SAFC crowd too much?

interwebs does not count

im not going to get into some internetz argument with the self oppointed forum guru but like i said, i do not know one, not one person that tunes for 12's up top on high boost set up. The fact you that you are telling me im wrong about people i know personally and that they do infact tune to 12.0:1 is kinda funny.



you're a funny guy, but you are suffering from one of the worst cases of forumdouchebagitus i have ever seen tbh.

My apologies for trying to correct misinformation, defend my position and illicit educated responses.

I personally tune to 11.8 afr. I have tuned only 4 cars myself and been in on about 10 other tunes assisting and going over numbers. So far, no issues at all. Now, I will say that the extreme power cars we do we tend to tune the same way, mainly because the engine mods and so on work well with it. I don't know, 12:1 is where my daily driver is right now (fuel economy) and no issues on that with about 38k miles on the setup. I average around 34-36mpg highway in the summer with the cammed T25 setup on AEM EMS. Just my experience.

Similar stereotypes with compression. No one wanted to boost motors with over 9:1, well, we are out boosting 11:1 motors now because materials/tolerances and tuning technology has shot up in the last 5 years.

To sum it up, i fyou feel safer at 11:1, run at 11:1, if you are comfortable at 12:1, run at 12:1. That is the great part of this, these are all individuals and custom builds and everything is done to the way the owner wants it!

Brent

You know that isn't allowed.

I agree with you and everybody who is in the know does what you say... It is the way to do it with the newer technologies that have been helping tune.



I tune the same way and get great results.

Personally I wouldn't build a turbo motor under 9:1 compression anymore. Lots of advantage with that compression.

im deep in the posts taking notes as we speak. believe me. my "HELP!!!11!" thread is coming. :o

Maybe on a lower boost level the higher a/f's would be acceptable. But I think putting my turbo over it's efficiency and with the same higher a/f's is not safe due to the heat. I believe Miko's said this. If I was running 16lbs with the same a/f's I'd probably keep the low 12's cuz more power.