atihun

My large streetport engine is done and 'almost' ready to fire up with the GT35R.

The question is should I break in the engine (no boost for first 500 miles) with a set of B9EGV's in the leading and B10EGV's in the trailing?

Since all the internal parts are new i think it may take about 1000 to 1500 miles for a good break in on dyno juice and then switch to synthetic...

LUPE

stocks plugs

Jason

iTrader: (5)

Anything will work for breakin. We use Platinum 9's all the way around.

Jason

GoodfellaFD3S

iTrader: (213)

7s leading and 9s trailing (stock setup) is probably your best bet for the sissy driving that engine breakin calls for

IRPerformance

iTrader: (41)

Don't use the 10s for break in. You'll just foul them. Stock 7s and 9s or just all 9s will work fine.

GUITARJUNKIE28

i use whatever's laying around in the used bullshit bucket, then change them when it's time to tune.