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This worked. Thank you for the helpful suggestion!

I just got my LS1 Swapped RX-8 on the road yesterday and did a little logging with the VCM scanner. It was running super rich in open loop but once it warmed up to closed loop it leaned out as the...

Any other comments on the tune or log?

Ah ok... that makes pretty good sense. So if I'm tuning in SD (which I am) it's still using the MAF values to calculate cylinder air? What should it be using to populate the timing table in SD mode?

Well I just got done tuning a friends L33/T56 Powered RX-7 and the results were a bit lower than expected... but maybe the expectations were too high? The car has an LS1 cam/intake/throttle body...

I guess what I am trying to ask is what variable(s) is the spark advance table most dependent on? Displacement (probably not), cam characteristics (seems likely), head design/compression (seems...

Service Pro - 201 Nooksack Ave, Nooksack WA

If they're from the area, tell them that it's the "old" Meridian Performance (MPS) dyno.

Can anyone help me out with a which spark table to start...

Yes, there's one local to me... It's a Dynojet. Why do you ask?

I am having a tough time deciding what might be a good spark table to start with. Here's the engine:

L33 (5.3L aluminum HO)/T56
'99 LS1 Cam
799 Heads
LS1 Intake and TB
Hooker cast exhaust...

Hey there. I am just finishing up my first 5.3L/T56 swap. I too started with the '02 tune... I should be able to give you some pretty good advice. First: which intake manifold, injectors and TB are...

Hey guys, I am rather new to the tuning world but have done two cars with cam swaps so I'm somewhat getting the hang of it.

Along comes a completely new project that I am really hoping a few of...

Cool idea. Never thought about using the brakes to add load to help fill the VE table.

Thanks for all the input. I think I will continue with the LS1 VE table and adjust from there. Just started it up 2 nights ago!

Right. So it's a percentage of the cylinder volume... which is defined elsewhere, correct?

Seems like this is saying one thing and then another. If it's strictly efficiency then the motors are probably very similar (same general architecture) and it's probably closer to the LS1 because...

No one? I guess what I am asking is if the VE table is displacement dependant or if it's merely cam characteristic dependant?

I am working on a swapped car that is using a 2005 5.3L L33 Engine with a complete LS1 intake (1999-style including TB, Injectors, Rails, etc.) and '99 LS1 Camshaft and a T56. I am trying to put...

Well I got 6 passes in tonight. 3 of them were 10.8's... one of which was a new personal best! Temps were high 60's down to high 50's I would say... no noticeable wind. Here is my new personal...

Thanks for the heads up, I was only watching the Knock Retard values which were all zero. I will use that config from here on out, but in the meantime, what RPM's are you seeing the burst knock?

First off, just to let everyone know, this forum is a HUGE wealth of info... thank you guys for that. I am fairly new to tuning so this is the first time I am going to compete with my own tune. I...

I am beginning to wonder if it's because my IAT is getting heatsoaked? I was thinking that if my car was truley in open loop my tune shouldn't be affected by IAT's?

Just a very general question. Yesterday I was working through my VE table in openloop for the very first time. Basically using my wideband error histogram trying to get a decent tune for 0-4000 RPM...

Awesome. I am excited to work on this tonight!

Yeah, it seems like the only changes was a huge block of cells in the >3000 RPM region were just changed to 28* and nothing else.

What is your opinion on whether or not I should start over with...

:doh:

Ok I will get started tonight. Should I reset all the fuel data with known good data I have, seems to me that would be a good thing to do before chasing my tail. Or should I just keep the...