as far as tuning goes what needs to be done? i have a safc tune and just wanna know if a blow thru maf setup requires any tuning

 

your original map should get it running but you will need a retune, air flow readings may alter your tune as well as temp readings

 

yea but that just calls for simple air/fuel tuning right? no scaling or anything so long as i use the right size piping

 

ok well today i bit the bullet and changed to blow-thru....WOW what a difference car



THE GOOD:

feels like stock now off boost and not stuttering, hesitation, bogging, and no stalling


THE BAD:

car feels like in boost its not as fast could be one of three things
-boost leak
-today was warmer than last night
-charge pipe temps are warmer
- it took my 12.2 afr tune to a 11.8-11.6 tune which is safer but i guess slower..

 

/\/\ intresting. Did you have to make any tuning alterations?

 

The higher signal the maf is seeing the more timing it may be pulling!

 

nope as long as the the pipe is 2.5 "INNER DIAMETER"


fixed the problem with being slower and afr being off, it was a boost leak haha

 

Are you on a standalone?

 

nope im tuning with the cheapest of the cheap, safc2

 

theres a local here who tunes on the safc2... But his car was at 17afr idle.. he said he tuned it like that lol! so i always thought it was crap! but it appears to be doing ok by you!

 

lol wtf 17 at idle....yea i havent tuned idle or partial throttle due to the fact that my stock ecu can do just fine with 410cc injectors and also i dont wanna cough up money for a fuel system just so i can tune partial..

on the safc you cant tune partial throttle or closed loop UNLESS you get a return fuel system and a new fpr

 

so whats ur wot? 11.8? 12?

 

I've long wondered about the effects of adding so much air volume between the MAF and TB on draw-thru MAF turbo setups. There's a lot of extra air in all that extra piping and IC. It seems to me that if you're tuning off the MAF, blow-thru is the best way to go. OTOH, if you're tuning off a MAP, it might not matter much as long as you can tune the MAF close enough.

BTW, isn't the stock MAF tube 2.75" ID?

Are you getting any MAF codes with the blow-thru and SAFC?

 

lol you and this maf code....i do things right i cut the maf holder part off my airbox put aluminum inside to brace the plastic and put couplers on each end then put it in my charge pipe ill have a pic tomorrow,

and the stock maf tube is 2.75 OD and just shy of 2.5 IN problem with most people is they get a 2.75 pipe and a flange of it for the maf and boom check engine...

 

i had it tuned for 12.2 at 4-5 and 12.0 at 5-6 and then 11.8 but now with draw thru my afr goes 11.8-11.5 its just perfect

 

wow man thats great! How does the car feel now thats its tuned right? And how do you pull timing?

 

wow coming from 15.7 afr to 11.8 is like night n day car feels twice as fast....

and stock timing map, safc cant tune for timing so that why im still on 5.8 psi and 410cc injectors haha

 

So im guessing the Blow thru set-up is the way to go from your experience so far cburg and the p-tuning kit running it! Its supposed to help with idle right? so no stalling out cause of unmetered air right?

 

my experiences:


DRAW-THRU
idle was at normal rpms but would kinda feel shaky and car would give lil sputters every 5 seconds..

everytime i would blow off the car would go to400 rpms or lower and stall

rpms were never steady when coming to a stop

hesistation everytime i would go into the next gear

sluggish off boost performance


BLOW THRU:

healthy idle
car acts like normal when i blow off
car doesnt hisitate at all no sputtering
car feels like stock off boost, i have my torque back no sluggishness

 

Sweet! Thats what i thought but its better hearing someone with experience lay it out! well glad i bought custom made blow thru piping!!

Thanks