jmross

So I have changed a few things with my setup and I am wondering if I need to retune to use the car with boost again.

previous setup:
tuned by locash racing on neptune for 9psi
b18b bone stock minus 68mm throttle body
drag log manifold
turbonetics deltagate
front mount intercooler
greddy type rs BOV
rc 440cc injectors
walbro 255

New setup:
block was decked(for flatness,could call machine shop to find out how much)
block was bored to 81.5mm
nippon turbo pistons(same compression ratio/dome height as factory ls pistons)
ported b18a cylinder head(milled for flatness,unsure how much,could call machine shop to find out) unsure if cylinder head has been milled before, got it used
port matched stock intake manifold
spoolin performance log manifold
tial 44mm wastegate with 5 psi spring

Other then whats listed everything is the same from when it was tuned for boost and now. I would be running less boost with the new setup till its tuned(wastegate spring is only 5 psi). If there is a risk of detonation or running lean ill wait till the car gets tuned again. I dont have a wideband o2 but can get one if its just a matter of watching the afr.

Any help appreciated, Thanks

0xenocron

Anything that changes airflow and/or flame speeds in the cylinder would require you to retune...I would say yes, take it back ASAP!

Turbo-charged

general rule of thumb....if you have to ask if it should be retuned, it should be retuned. most tuners offer a discounted "retune" fee. sometimes just strapping it on the dyno and making a pull or 2 is worth knowing that its correct.

nealnanoHX

LOL Locash sucks, Joe is a dick but a good tuner. Don listen to all the AZ hype about Locash tunes the fasts Hondas. XactDyno tunes 700-1000whp Hondas as well. Go to SRD/XactDyno for tuning by Tim. Great tuner, customer service and dyno tuning is much less expensive, I pay $200-250 for turbo tuning. Not to mention they have a full service shop. And yes you need to retune for sure.

jmross

I'll get a retune for sure. I'll check out that other shop also. Gotta move up to phoenix for work soon so I'll be getting a retune after that.

Thanks for the replies

nealnanoHX

SRD/XactDyno is great, Tim really knows his Hondas. He has a 380whp turbo EJ and a 300whp NA DC Teg that he daily drives, yep both. They are in Tempe check them out.