How much airflow is your t25 moving? Mines only pushing 20lb/min Garret says 26?!?

[1fast97gsx]

I'll see how much herz I can get out of mine tonight and smoke all you bishes

 

[ShapeGSX]

my measured airflow is 19.5 ... this is on a scm61 @20 psi and 780 injectors tuned roughly at -40. You can't rely on airflow for anything once you have a few mods.

Sure you can, so long as you don't use a POS AFC to tune the car.

With DSMLink, you aren't lying to the ECU about the airflow.

 

[1fast97gsx]

yea but I have safc. No eprom ecu and no money for dsmlink :thumbdown

 

[ShapeGSX]

Yeah, I sold my datalogger and my AFC to pay for DSMLink. Back when I bought it, it was only $470. I have DSMLink chip #4.

But my point was that you actually can trust the numbers that DSMLink gives you.

 

[nanokpsi]

yea but I have safc. No eprom ecu and no money for dsmlink :thumbdown

This is why YOUR airflow is ####ed up. You are logging the amount of airflow the safc lets the ecu see. This is also why an afc sucks. The computer thinks you are flowing less airflow than the other member with a t25 and is giving you those ipw and timing. This is alos whay you are seeing more timing than the 16 you should be seeing if you are flowing more than 2.1 g/rev.

 

[ItsStockOfficer]

This is why YOUR airflow is ####ed up. You are logging the amount of airflow the safc lets the ecu see. This is also why an afc sucks. The computer thinks you are flowing less airflow than the other member with a t25 and is giving you those ipw and timing. This is alos whay you are seeing more timing than the 16 you should be seeing if you are flowing more than 2.1 g/rev.

I have always liked my afc for the same reason you hate it.

 

[ShapeGSX]

I have always liked my afc for the same reason you hate it.

There are MUCH better ways to control timing than just by chance.

 

[EclipseOwner95]

is there a " formula " for hz to lb/min ? id really like to see what im pushing through my big 16g, my best " hz " has been right about 2200 stock sidemount on 20psi

 

[nanokpsi]

is there a " formula " for hz to lb/min ? id really like to see what im pushing through my big 16g, my best " hz " has been right about 2200 stock sidemount on 20psi

I don't have my laptop here to look at logs and compare but that sounds high for a b16g at 20 psi.

EDIT: Saw this was on your 1g but it stil sounds high.

 

[kpt4321]

3 ways I know of to increase your lbs/min flow... Upgrade intercooler, lean out your a/f some more (if it's running rich) or add more boost...

Wrrrooooooooonnggg!!

The A/F ratio doesn't effect airflow, don't bother.

There are also about a hundred ways to increase it.

-Upgrade Cams
-Bigger turbine hsoung
-Higher flowing turbine wheel
-Bigger exhaust
-Head porting
-More boost

Should I go on?

 

[kpt4321]

If you have the GM MAF. you won't read much more than that even though it's flowing more...

Wrong again.

The MAFT will give a very accurate airflow rating as long as, once again, you're not using airflow to tune. If you are, then it's the same deal as a SAFC, which has nothing at all to do with the GM MAF.

 

[nanokpsi]

Wrong again.

The MAFT will give a very accurate airflow rating as long as, once again, you're not using airflow to tune. If you are, then it's the same deal as a SAFC, which has nothing at all to do with the GM MAF.

Actually the MAFT is usually inaccurate. People running the DSMlink often have to recalibrate them with seetings in the ecu. The difference is usually liniear though so i would imagine it is something in the conversion process.

 

[kpt4321]

Actually the MAFT is usually inaccurate. People running the DSMlink often have to recalibrate them with seetings in the ecu. The difference is usually liniear though so i would imagine it is something in the conversion process.

1. I don't know about the unaccuracy, I have seen it be very close on several DSMLink cars. I don't know about my 1g because I have not run the stock MAF with the MAFT side by side, but I can tell you that al the calibrations are dead on. If I do the injector compensaion and such in the ECU, the car runs perfect like you would expect it to.

2. Second of all, he was definately not talking about some kind of linear inaccuracy. He acted like it won't read above a certain amount, which is not true at all.


Edit: Don't take this as a challenege. Just my experience.

 

[SpoolinGSX]

I was running 28.5 lb/min on my t25. And DSMLink was definitely the best mod I ever did.

 

[RuBiCaNT5X]

I was running 28.5 lb/min on my t25. And DSMLink was definitely the best mod I ever did.

What was your boost and mods at the time? Were you on the stock SMIC?

 

[truwarrior]

Ya do you still have the stock smic or what? Just check a few other logs and with the temp and such outside the most I got was 23.9 @ 5500rpms, I bet at that point the wastegate is opening because of the weaker spring...

 

[j_woody]

I was running 28.5 lb/min on my t25. And DSMLink was definitely the best mod I ever did.

I am running 16psi on my t25 and never see more than 23lb/min. what psi are you running?