k, i'm dumb. there are gif copies of the the report in the thread. a dur...

good round-up of his posts. it's a sticky in Engine Tech.
https://www.evolutionm.net/forums/sh...ad.php?t=65648

 

I can't find the chart I was talking about. I think it was originally on the AEMPower forums. I'll see if I can't dig it up.

 

Here's a good link I found for you apes. j/p, always pickin' up new info so I figured I'd make up for my lost chart by sharing this.

http://www.daytona-sensors.com/tech_tuning.html

 

Interesting - according to the CR chart, the RRM piston crowd should need 98 octane to optimally run 10.5:1 pistons.

And yet Boe didn't blow up on 91...

==========================================

And later on, we get this:

Oh, that makes me annoyed.

 

I dunno where the 98 octane thing came from.

The % power increase is based on larger displacement motors I believe. The basic theory remains the same.

 

I went to 10.5; moved the mouse straight up; moved the mouse straight over; mouse was sitting in the high 90s. I estimated 98.

Here's an example...

 

I didn't intend for that to be a guide for anyone's tuning uses.... it was more to help answer some questions that had been presented in the thread that it was plucked from. I, of course, don't have a problem with it being quoted, but at the same time, the caveat that it's not going to take into account all tuning variables needs to be presented.

FWIW "limp mode" has the AFR at 9.6:1

God I hate our ECUs....

 

Kris, that is understood. I just posted that so n00bs like me would have a basic idea what the hell was going on.

 

Oh, I see what you're saying. I was quoting from the text. I think that chart is ideal range, their comment mentions safe range.

EDIT: In the case of the Lancer I'm sure the ECU will just pull timing until it reaches whatever the max limitation of the ECU is. Then it'll throw a CEL and crap out into limp mode.

 

http://www.ls1tech.com/forums/archiv...p/f-7-p-1.html
Here is my contribution :P

 

"knock retard..." Sorry, I just find that amusing.

Lotta stuff for me to read.

 

^ LOL, got that right. LS1 forum but still lots of usefull stuff.

 

Combustion is combustion no matter what car you're in. EFI principles remain the same throughout most automobiles too, however the different engine configurations lead to different problems and fixes.

 

So much to read, so little time

 

Ok, so here are my questions:

1) Is the graph accurate, because then at stock compression 9.5:1 we should be running 90 octane fuel, when recommends 87.

2) What does each pound of boost do to the compression ratio?