Couple tuning questions

[coppertop_01]

Its been a while since I have come to this site, but I don't trust redlineforums anymore

so I have a couple questions, but alittle history on my car

2.8" pulley
60 lbs injectors
full exhuast including header
Cold air intake

I have been tuned, but I am not sure if it is working correctly, does somebody have a tune that I can check out a few things, see if mine is ok.

What I have noticed that is causing me to question the tuner is..........at WOT my car is reading 11.5 a/f, which is allright, alittle rich but close enough. But when I am at part throttle, boosting between 5 and 10psi I am getting 10.5 a/f which is WAY too rich, is this standard? or a tuning problem. On top of that, the guy who tuned me has the PE level set at 9.8 or something like that, but I am only getting to 11.5

Anyways, thanks for your input, I have a friend that he and I have bought a HP Tuners, he has been learning it, and I would like to see what you guys have been doing.

Jer

[aikidoshadow]

+1 If anyone knows how to level out fueling between being in or out of PE, I have been trying to get a leveled PE setup lately.

[SCblkRL]

have you tuned your MAF?

[GMRedline]

+1 If anyone knows how to level out fueling between being in or out of PE, I have been trying to get a leveled PE setup lately.

From what I understand (not a tuner by anymeans) is the PE is a multiplier of VE. Basically you tune your VE for 14.7 or somewhere around there and then adjust your PE multiplier for your desired afr.

You dont really tune for PE I guess.... They only thing you change is when it gets activated. Like PSI and RPMS.

But Im on the other end of this problem. I am way lean until 4700 then fine till 5500. Then super rich to 7k. :shrug:

Im meeting up with my tuner today.

[SCblkRL]

it really sounds like your MAF tables are off on both accounts. VE has very little to do with these cars especially since you can more or less disable VE all together and run off straight MAF.

PE is actually a multiplier of your stoich. 14.7 = stoich, you want to run an 11.4 so formula would be 14.7/11.4 = 1.2894736 That is your PE multiplier

[bc3tech]

it really sounds like your MAF tables are off on both accounts. VE has very little to do with these cars especially since you can more or less disable VE all together and run off straight MAF.

PE is actually a multiplier of your stoich. 14.7 = stoich, you want to run an 11.4 so formula would be 14.7/11.4 = 1.2894736 That is your PE multiplierdont' know much about tuning, but just critiquing your math here... if PE is a multiplier of stoich, and you want 11.4, you'd actually want the PE to be 0.7755... as 14.7 * .7755 = 11.4 while 14.7 * 1.289 = 18.995 :eek:

[aikidoshadow]

No the 11.4 does translate out to 1.2894736, you just don't multiply per se. you divide.
14.7 / 11.4 = 1.2894736 (this number is what is plugged into the PE table)
14.7 / 1.2894736 = 11.4 (Commanded AFR)

[bc3tech]

No the 11.4 does translate out to 1.2894736, you just don't multiply per se. you divide.
14.7 / 11.4 = 1.2894736 (this number is what is plugged into the PE table)
14.7 / 1.2894736 = 11.4 (Commanded AFR)
roger - so it's not a multiplier but a divisor ;)

[SCblkRL]

potAto - potA'H'to....you got the idea :)

[coppertop_01]

I am not 100% sure how I am tuned, by MAF or PE, but I do know that whenever I go into PE mode, it runs rich if I am not at WOT, but at WOT it runs a good a/f.

Guess I will have to wait till my friend does more reading at gets a good knowledge of HP tuners

The guy who tuned my car said it was something todo with the air temp, because it burns slightly leaner than 10.5 in cooler weather, and warmer it burns richer, but I don't know, there is something else playing on that he doesn't see

At least it doesn't run lean, and I can boost it all the way without a problem, just burn through the fuel faster than I should be

[SCblkRL]

are you running a wideband?

[coppertop_01]

of course, I have a Innovate LC1 unit.

Jer

[MGM1979]

I only read the first post, so sorry if I'm repeating the obvious at this point...

your MAF is probably not dialed in properly, and your PE multipliers are definitely off.


I don't have anything reliable you can look at, and by the time I do, I'll be tuning with a return-line conversion installed, so it won't be much good to you at that point anyway.

[SSKev]

What he wants to know is this:

the PE table is set to command 10.8 across the table,

but his car actually runs 11.5 under WOT, while 10.8 is commanded.

This is how his tuner set it up.

Will this cause problems, or should he just leave it since it is actually running at the AFR that he wants?

Kevin

[MGM1979]

What he wants to know is this:

the PE table is set to command 10.8 across the table,

but his car actually runs 11.5 under WOT, while 10.8 is commanded.

This is how his tuner set it up.

Will this cause problems, or should he just leave it since it is actually running at the AFR that he wants?

Kevin

Fair enough - the PE table is not the only multiplier (can't remember the other players off the top of my head, having not looked at it in a while)...so, while his PE may be calling for 10.8 across the board, there's obviously something else at play that is getting the fuel mix to 11.5...now, if he thinks 11.5 is a little richer than he'd like, he can set the PE to command 10.9 or even 11.0 to lean it out a little more...

[SSKev]

COT is disabled,

and what I am saying is that if you run the VCM Scanner, and read the Air Fuel COmmanded, it will say 10.8

So the tuner left that alone, and just messed with VE and MAF tables so that it will run a 11.5

The question is whether or not it should be left like that, or corrected so that the actual AFR is the same as commanded?

Kevin

[coppertop_01]

Thanks for coming in Kev, I really don't know enough about this yet.

Jer

[aikidoshadow]

I have my PE table set to command 11.8 progressively getting slightly richer, down to about 11.5-11.3. I ll have to double check later but I'm pretty sure thats it.

[coppertop_01]

aikido : whats your mods? if you are close to me, can I get a copy of your tune? so SSKev and I can check it out and see what the guy that tuned me might have missed

Jer

[aikidoshadow]

aikido : whats your mods? if you are close to me, can I get a copy of your tune? so SSKev and I can check it out and see what the guy that tuned me might have missed

Jer
I could give you my tune, but my weather is just about the exact opposite of yours since we are about as far away north to south as we get . :lol:
You have my email still right, Jer? Its the one I sent you from the paypal payment for well everything. If not you can PM me here or on IF.net. Let me know.

All in all though you might be better off looking at the tune from HP Tuners forums since they have walkthroughs on the 60's and misc tunes in the threads regarding those or perhaps coaxing Doc into looking into his bag of tricks. Let me know man I can try to help. :)