MSefi.com read only forum (Jan.15,2018)

Thanks for the input, I'll try messing with it some more. I still think the boost pressures i'm seeing are excessive and in error. I've run the table all the way up to 150 and still been able to max out the boost pressure (the engine is incapable of those pressures under no load conditions). It's ...

Here you go, hopefully someone can see what i'm talking about. I won't be shocked if there are things that are wrong, but it does run pretty good except for the accleration problem. I did the data log after a 100 mile cruise tonight. Thanks for any input.

will do

MSII v3(only a year old) running latest version megatune, 4.6 Ford V-8, running fuel and spark EDIS-8 from MS.

Engine starts, runs, idles drives just fine. There is some weird condition under boost, I stab the throttle, the boost spikes up way higher than the actual pressure being produced and it ...

Boost gauge is fluttering pretty bad during all of this.

Matt,

I've been struggling with a similar problem. I'm running MS-II v3 with the latest software/firmware/megatune and am seeing boost pressures that shouldn't even be possible with my setup. I've run the map cell all the way up to 180 and ...

Ya know, I have almost the same problem. Even though I have a supercharger, it acts very much like you describe. I've had this engine running on MS before, but this is a new ECU w/ updated software. I've played with all the parameters as well like the Accel enrichment, VE tables, etc. My engine ...

That makes sense, I'll give ita try. I should know this by now, I feel stupid.

I can't seem to get the acell enrichment to slow down enough, it's popping and bucking past 50% acell. During moderate acell it's fine up to 50% TPS. If I stab it quick past 50%, it pops and bucks again. i've tried to reduce the enrichment and also increasesd the range bins for both map and TPS ...

Thanks!! Either one of those would work perfect.

I'm looking for a remote mounted TPS, one that doesn't need to be mounted on the throttle shaft. There a few out there, but most over $150 where thay have taken a $40 sensor and monted on a $2 bracket. Any ideas?

Well I don't know what the specs are on the engine your putting together, but an 8-71 seems pretty big for a SBC. I'm not real familiar with hte GM TBI, how many injectors are there? Do you know what the TBI's are rated for flow? (Fuel and air?) What are you using for injectors? Why not just go with ...