I have been trolling for months just reading things here and there, and it seems like over the years things have changed so I am not sure what is what anymore.
Long story short, my SL is finally running long enough to actually dedicate some time to the tune.
I am using the latest turbonator as well as the latest MPTune. The cals have always been pretty good once scaled properly, but I've always had tip in issues. I have never touched the PumpEff table, and I think thats probably where most of my problems are. Like most impatient people I went right for the Map/Full throttle table, lol.
So for the PumpEff I have a real stupid question. I know it's best to adjust it at load with zero boost, so that means dragging the brakes. I am assuming this is full throttle, but I could be wrong. Is the goal to aim for stoich, or richer than that?
I don't have a scanner, so my ability to judge knock is based on the CEL illuminating. As it sits now I see random knock at about 4000-4200 in 4th and 5th... but ONLY if I smash the throttle while in those gears. If I am doing a WOT burst from say 2nd to 5th... I don't see knock. Its only when I am cruising at say 3000rpm in 4th and nail it will I see knock at 4000-4200. I am assuming MBT is around that point. I am more or less just curious as to what kind of timing people running 21psi+ are running. I have been pulling my timing back more and more trying to eliminate knock... but for all I know its not real knock (I need to check the plugs).
Ok, one last stupid question. The car always goes rich on decel, and it annoys me. It was even worse on the FWDP S5 tune. Where do I fix that at? Will that problem go away once I get the PumpEff dialed in?
I guess a mod list might help too... I did buy this car modded already. I did have to put a new motor in it though, which is why it has forged parts now. Some mods are obvious to me, some I didnt even think to check (like the porting of the manifolds or the throttle body). Anything in "" is what I was told it had but I havent personally verified. I would suspect they are there though, I completely trust the guy I bought it from.
87 SL 623
CB 2.5 w/ Venolias and forged rods
782 Head
Adjustable Cam Gear (set at 0 right now)
"Ported" 2 Piece Intake
"Ported" Exhaust Manifold
"52mm TB"
3bar Map
Turblownetics 50trim
Grimmspeed MBC (G-Valve wasnt having it above 17psi)
2.5" Mandrel Bent exhaust w/ cat and bullet style muffler
NEW 550cc Injectors (550cc at 43.5psi... which is where I run my fuel pressure)
FWDP Billet Rail
AFPR
Junkbro 255 (Its holding together, guess I cant complain too much)
Whatever you guys call 2 stock ICs welded together (it's getting replaced soon enough)
PLX OLED Wideband
I think that is all that matters. Well, I guess I should say in the end I would like to see 22-24psi on pump, more if I can eek it out of it. Eventually (in the next 2 months) I want to toss in a nasty cam and meth injection. Right now it needs tires, so that takes away from the mods for a little bit.
Thanks guys.