skatingsamurai

i need advise on what to do please

Bad2ndgen

is it at 3000 or 3800rpm's? What are you fuel mods? How are you controlling fuel? How much boost are you running? How do you know its rich down low? How do you know its lean up high?

No the only way too tune is not under full load, its just the most important time to have the state of tune correct. Answer the questions above and maybe we can help.

RETed

I do it all the time.
There's a safe way to use an EGT gauge to tune fuel, and most people don't know how to do it.
Wide-bands are easier and do react faster, but to state you cannot tune fuel with an EGT gauge is pure ignorance.


-Ted

RETed

Upgrade fuel pump???
FCD???


-Ted

Bad2ndgen

Please enlighten me......I don't pretend to know it all and would be very interested in your technique....Thanks

skatingsamurai

FD fuel pump FCD
i think its in my info um its around 3k bout 9-10 psi maybe. and that what im asuming...could you tell me how to tune using a egt gauge plz?

RETed

My recommendation to you is to get a narrow-band AFR gauge.
Some are as cheap as $35 (Summit Racing) and the Autometer 20LED ones are like $50.
If the hesitation is due to a fuel problem, it will show on the gauge.


-Ted

skatingsamurai

well i HAD one but i sold it due to it being USLESS acordning to eyecandy is his name on the boards because since its only runs off a 1 wire o2 sencor i dont get real signals....i did try the gauge out and when ever i reved it got rich. that shouldnt happen should it? it should go from about 15 afr to like 12 or 13 something at 100% throttle....IF you think that would be the best way to "rough" then i guess ill by a cheepo one again. but what do YOU guys think?

RETed

Oh boy...


-Ted

patman

iTrader: (3)

narrow band AFR is good for rough tuning. the best way to tune with one is just as a 'patch' until you have a chance to get a wideband or take the car to a dyno. My method is to tune to the line between stoich and rich (off boost) and about 2/3 of the way rich on boost. you wont get full power, and your gas mileage will suck, but your car will run fine, and your engine will be safe. DO NOT try to use a narrow band to fine tune, since it is realtively inaccurate, and will more than likely result in a poorly tuned and possibly blown engine.

however, if you just want to get the car to run ok until you have a chance to tune it right, and as a normal use guage to just keep an eye on the mixture, 1 AFRs are great.

pat

skatingsamurai

thanks a million pat and every one else.

i cant say enough how many probs. i have solved already just by trouble shooting with you guys. i really apritiate it alot

-steve

Evil Aviator

I think you need to have a professional tune your engine. Reading the internet and buying a tool (afr gauge, egt gauge, etc.) does not automatically turn you into a tuner. It would be like if you bought the same paint used by Michelangelo, and then thought you could paint the Sistine Chapel on the ceiling of your house... not gonna happen.

And yes, the AFR should go from about 15 to 12 or 13 under full throttle during acceleration. It's OK if you don't know these things, as it's not something you should know from your public education, but it is a venture into folly if you still try to tune your car in ignorance. However, using a narrow-band AFR gauge just to monitor the engine is a good idea for anybody.

* Just as a side note so I don't sound like I'm flaming, I would like to point out that I don't tune my own automotive engines, but rather I have much more experienced people do it for me.

I agree. Most aircraft engines are tuned SOLELY by EGT. The last aircraft I flew was tuned by EGT, and each engine was good for nearly 2,000 hp, running an 18:1 CR (about 250psi boost).

JAPSPECGTUs

'
True, but going from 400 to like 1400 dollars for a Haltech with a proper tune is a major setback to some people, plus don't you need a labtop as well?

patman

iTrader: (3)

I would like to know how to properly tune using an EGT. If one of you guys would make a thread about it, I'm sure more than a few would appreciate it.

pat

skatingsamurai

i would agree with you patman...might time to reserch something like that

as for my gauge ill but the 27 dollar summit one with FREE shipping yeah! beats the 71 dollar one i bought up the street couple days ago

Bad2ndgen

If you want to call someone ignorant the least you can do back it up with some hard facts. And now that everyone knows that you are such a great tuner and you know everything about everything, you should not have a problem proving me wrong here....

https://www.rx7club.com/2nd-generation-specific-1986-1992-17/please-enlighten-me-tuning-fuel-egt-361690/

skatingsamurai

if that last comment was directed towards me i diddnt mean it in offence...i simply meant that if i would do something like that i would need to do research or see it done in person. i have the utmost respect for the guys on the forum (especially cuz they prob know more than me).

RETed

No, he's talking about me.
I've put in too much time and effort to figure out how to do this.
If you a search under my nick, you might be able to piece together everything.
I've dropped enough hints on here on how to tune with an EGT.
I'm not going to do a full-on detailed write-up on how I do this, cause people pay me for it.
There's a reason why I haven't replied in that other thread.


-Ted

Bad2ndgen

I dont want to be a dick or put down the way you do things but simply stated, I dont really want to know how you do this because your tuning methods are wrong. I used to think alot of things and always thought I was correct but then I was turned on to something that educated me. I invite you to do the same......Oh and I get paid for it too.

www.efi101.com

P.S. I didn't mean to get all huffy, but I really took offense to the "ignorance" comment.