At the point of getting a tune??

[z3us]

Just curious at what point you guys would look into a tune. My build consist of:

91 S13 Hatch
Fully Rebuilt KA24DE
Supertech Forged Pistons 10.5:1
Stock Rods
Clevite Bearings
ARP Bolts
EGR Deleted
Walbro 255
1:1 Rising rate FPR

About to add a N60 MAF and i think this will need the AF tune. But is it pointless to do this until i go turbo?

[nightsauce]

you're gonna boost with 10.5:1 compression pistons?!?

[z3us]

Yeah, thats stock comp right? I read where its safe for about 300hp on stock internals so i went with it.

[vas570sx]

i dont believe that is the stock compression ratio..

[z3us]

Well, thats some junk huh. Oh well the place i bought them said good for turbo. Supertech P4-N8900-N11 Forged 4032 Aluminum Pistons S14 KA24DE 89.0mm (http://www.frsport.com/Supertech-P4-N8900-N11-Forged-4032-Aluminum-Pistons-S14-KA24DE-89-0mm_p_15916.html)

Its getting boost lol.

[landins13]

lower compression allows you to run more boost safelly, higher compression will spool faster and make more power but will be more unstable

[z3us]

So how about the tune?

[jacobs13]

yes you need a tune. You changed the factory setup so now everything is off. Youll be fine boosting 10:5:1 but be very careful with your ignition timing

[z3us]

Safc for now or is there a better option?

Im na now but will be boosted within a year.

[Luvs2slide]

Isnt the Haltechs mostly MAP setup and not MAF?

[RB240zDET]

lower compression allows you to run more boost safelly, higher compression will spool faster and make more power but will be more unstable

Not just unstable but likely to pop or blow up. I have always run nistune on my engines so that when I do a simple upgrade like injectors I don't have to pay a lot of money to simply re-tune. Any time you change or mod or upgrade from a stock setup you will want to tune the ecu so that you actually make use of that upgrade or mod.