Just remember I am returnless so my IFR and Offset tables are sloped.

 

Good job getting it up and running. I am procrastinating. I really need to install some 60lbers.

 

They are requiring allot more attention then my 44's did, however you having a return system may make it easier.

 

Here was my 6.0 tune Im still fine tuning the 408 so the VE table is pretty choppy. It's been acting like this ever since I went 2bar SD. I used redhardsupra's excel program for the IFR table.

BTW sorry to get off topic.

 

Your IFR Table is scaled wrong, its scaled for a Returnless system. Yours should be the same value the whole way across.

 

Yeah, really should be as easy as plugging in the new flow rate into the IFR tables.

 

OOPS!!! This thread confirms what you just said. I guess that spread sheet wasn't meant for a return style system.

https://www.performancetrucks.net/fo...ifr+calculator

O.K., The weird thing is it only runs lean for 30 sec. then runs fine. I'm sure the IFR could be messing w/ my VE table some (making it a pita to dial in), but I think my problem has more to do w/ SD mode. I had written it off as just a side effect of running 2barSD until you said you don't have this issue. If you don't mine I'd like to take a look at your tune also.

Here's my thread from hptuners.
http://www.hptuners.com/forum/showthread.php?t=10815

 

Not a 2bar thing. Mine actually kicks in cold enrich and idles rich on cold starts. If warm goes right into closed loop and at 14.7:1.

I do see a lean tip in at bout any throttle input. Now that is a 2bar thing that I don't think can be tuned out everywhere.

 

I dont get a lean tip in..... the saga continues.

 

blown, bare with me, I didn't read the whole HPT thread you had going....at first glance on your OL/CL tab. The rich/lean integrator, VERY VERY VERY low(I'd say put 4.0 in there). HPT doesn't describe this item, but if it's a multiple of something dealing with start up...yikes. However it is on the closed loop side of things, so it may be nothing since you are in OL.

Make sure your STFT tab is chosen. When I opened your file it had nothing there, like you still haven't picked enabled or disabled. Maybe it's just on my end.

Post up a scan of the this happening. One hot and one cold. I can tell ya though, these mototrons flow 72.3 at 58psi, which is our return system. So, IFR table, 72.3 across. Bring those offset numbers up some, double them. I'd advise .5341 at 13.5Volts. scale from there. (.48 at 14volts and .5646 at 13 volts) Now you'll be close to what seems to work in those areas. Min Inj table...yours is low IMO. .88 is what I have. This will affect decel and anywhere where you aren't giving demand, the more vacuum the less injector in theory (as per your offset table).

Your VE table is too choppy to diagnose a lean start up IMO(in idle areas). You have a huge lean spike in the 400rpm area. Remember, these cells are blended from one to the next, hence the importance of smoothing. As you warm up and move to the next cell you get less lean. (just a theory, not a suggestion of a cure).

ky...you say cold enrichment, you are talking about the OLFA table?

Lean tip in OL is sorta tunable if you have transient tables. But I am on the side of the fence, whoopty doo, as long as it recovers instantly (a blip on the afr gauge) it'll be alright. Unless you're holty's truck, he gets kr when he goes over speed bumps.

PS...start your own thread in here so we don't bulldoze pat's thread too bad.