2G EPROM question

[Clipse90Turbo]

I'm about to do a major upgrade to my ride. I'm about to get/have a ported and clipped big 16g, 550 injectors, 190lph fuel pump, afc, Dejon Tool 2.5" blowthrough GM maf system with translator and piping, almost chrome color, fp 4" intake with 2gmas and apexi filter/adapter, ported 2g manifold, and maybe a few other items. I was wondering for me to have all of this do I have to have a Eprom ECU for my car? Or can I use the stock ECU???

Thanks for the space.

 

[Cnock]

First of all why are you running a 2g MAS and a GM MAS? that makes no sense and isnt do able. To anwser your question the stock ecu will be fine if your tuning with the afc but you will need some sort of datalogger if you dont already have one get one.

 

[talonkev]

Well you only need a 2g mas or GM maft, you don't need both. You can tune with the maft and afc so you don't need an eprom ecu. An eprom ecu could help you out by allowing you to chip it or use dsm link, but its not necessary for your setup

 

[Clipse90Turbo]

Man I'm new to this whole venting out. I've vented before, but not with the right parts to support. Now, what I'm curious about is if I have a FP 4" intake with the 2gmas that doesn't have the bov return tube or anything than if I hook that up, and vent out, I'll be okay? I thought you had to have the 3"gm maf and the translator inorder to vent out. So I thought that would take care of the air readings from venting out. Then since i'm venting I have this intakewith 2gmas with no bov return pipe or anything. So if I'm wrong, what do I need to do to vent out. Can I get by with just the intake? I thought you had to have the uicp with 3" maf and so forth. Thanks. Sorry to make this sound dumb, but I want to do this right and I was hoping you guys could help. Thanks.

 

[boostedinaz]

Your first mistake is spending all that money just to vent, but that is just my opinion. Just use a GM MAF and MAFT in a blow through setup and be done with it. If you have that then all you need is a filter on the end up your crazy big FP intake.

 

[rowlex]

keep in mind how incredibly unaccurate to a DSM's actual airflow the GM MAFT is. as well as its lack of barometer and temperature changes. I have a hell of a time keeping mine accurate and im running DSMLink with an external -- logged boost source. Humidity, cold, hot weather, all ####s with the maft.

EDIT: you also do not need a 4" intake on a 16g that has an intake size of 2.25? maybe 2.5? ...no seriously you don't it wont make a bit of difference.

 

[Quasimondo]

If you have a 2g mas and you're running 550 cc injectors, then you're set. The 2g mas will lean your fuel trims enough that it will compensate for using the larger 550 cc injectors.

 

[andymoraitis]

If you have a 2g mas and you're running 550 cc injectors, then you're set. The 2g mas will lean your fuel trims enough that it will compensate for using the larger 550 cc injectors.

Not all by itself it won't. Any change in injector size either requires chip remapping in the ECU (Keydiver Chip), DSMLink, an MAFT or an AFC. If he adds 550's without fuel control, I can guarantee he'll run so rich that he'll lose power. That's why chipped ECU systems use deadtime and global adjustments to make a larger injector trigger like a stock one. It's not a plug and play thing that the MAS or ECU have the capacity to learn.

Make sense?

Andy

 

[Clipse90Turbo]

You guys have been a tremendous help. Now if doubting if I should get this set-up. the only reason I was really getting it was that I bought that intake and it was made to vent out, which I didn't know when I bought it. I thought it would have the bov return tube and all. So I've been trying to sell it, but I've had no luck. So I thought if I got that blow-thr set-up I could make use of the part. I'm wondering now, if I should just get a different aftermarket intake and just a regular aftermarket uicp and be done with it. I'm just trying to do more than I need to I guess. So do you guys think I should just say forget the blow-thru idea?

Thanks
Chris

 

[rowlex]

I bought that intake and it was made to vent out, which I didn't know when I bought it. I thought it would have the bov return tube and all. Thanks
Chris

The intake pipe (filter to turbo area) is a non-charged pipe. Take it off, drill a hole in it, run a tube from the BOV to the hole you drilled. Cheaper then buying a $250+ GM MAFT setup...

 

[dsm-onster]

keep in mind how incredibly unaccurate to a DSM's actual airflow the GM MAFT is. as well as its lack of barometer and temperature changes. I have a hell of a time keeping mine accurate and im running DSMLink with an external -- logged boost source. Humidity, cold, hot weather, all ####s with the maft.

Hey you have maft and dsmlink like me ...

But humidity does not #### with maft. It is a hot wire setup: the number of air particles (air mass) changes the signal. if the air temp is high and the pressure is constant, then the air density is less and the gm maf reads less air mass. My dsmlink /maft setup does not at all detune with humidity or temp changes (or even altitude changes for that matter). I must admit i had a hell of a time tuning with a blowthru setup. but once i got what i wanted it is precise and consistant according to my logs.

...to the thread starter, you don't need no stinking eprom with 550s you should tune well you maft and afc. I did "decent" with 650s and just maft. save you eprom for when you get a bigger turbo and injectors combo or something.

 

[Clipse90Turbo]

Thanks again for the input. I'm now thinking of just modifying the intake and not running a blow-thru. Cheaper and seems like it would have less problems. Thanks for the help!

Chris