question for engine builders dealing with boost
04-13-2010, 01:45 PM
#1
question for engine builders dealing with boost i'm buyin a 402 forged shortblock and the plan next year is to put a supercharger on it. since i'll be running rings for boost, should i just wait to get the supercharger to even start the engine or should i run it N/A to get everything seated and break it in?
04-13-2010, 03:44 PM
#6
what about the gap difference? when i go from running it NA to blown. originally i was going to run it N/A but i was told the reason he was telling me otherwise is because i was talkin to him about what i was told by tim at scoggin dickey, my tuner, an engine builder in so cal and i think 1 or 2 other people that it'd be best to break the engine in N/A before puttin that blower on it since all the parts will be brand new and you don't want to shock them too much in the break-in period of the engine witht the blower i'm puttin on. but my buddy is saying i should break it in with the blower because things wont be seated right and the heat tolerances will be different from N/A and the blower set-up and that'll be bad for the engine
04-13-2010, 04:41 PM
#7
Break it in N/A. Once the rings are seated it wont make a difference. I plan on running my new motor 500-1000 miles before I let her see any boost. I also plan on using joe gibbs breakin oil and changing the oil 2 or 3 times within that period. Dont stress the new parts till everything have broken in and mated to its counterparts lol. Ring end gaps will or should be different from N/A to boosted. Running a higher boosted engine is going to require a little more clearance on the ring endgap.
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04-13-2010, 04:50 PM
#8
blower wont have anything to do with breaking in-you wont be in much boost driving it easy for a little bit-just make sure the ring gaps are set up for boost
i have never run one w/o the blower at first-you think all those new cars are run around w/o their blowers before Ford/GM slaps them on, lol
i have never run one w/o the blower at first-you think all those new cars are run around w/o their blowers before Ford/GM slaps them on, lol
04-14-2010, 10:06 PM
#13
NA is fine. The action that seats the rings is when you let off at a decent rpm and the high engine vacuum pulls the rings against the cylinder walls. With most modern rings, 10 or 12 good cycles like that and they should be seated. A complete cooldown cycle afterwards and a retorquing of the head studs per the gasket mfg. and you are good to go. Make sure your builder gaps the rings as per the ring mfg's recommendations for a street boosted motor.
Jim
Jim
04-15-2010, 12:07 AM
#14
NA is fine. The action that seats the rings is when you let off at a decent rpm and the high engine vacuum pulls the rings against the cylinder walls. With most modern rings, 10 or 12 good cycles like that and they should be seated. A complete cooldown cycle afterwards and a retorquing of the head studs per the gasket mfg. and you are good to go. Make sure your builder gaps the rings as per the ring mfg's recommendations for a street boosted motor.
Jim
Jim
04-15-2010, 07:45 AM
#17
To answer your question, I am also building a motor for boost, add my builder to the list who say breaking it in NA is no problem.
04-15-2010, 10:59 AM
#19
I'm in the same boat with my LT1 - water pump broke suddenly which took out the head gasket. I replaced the water pump and it didn't behave like it had a blown head gasket (no white smoke or power loss) so a couple weeks later I hydrolocked it.
To answer your question, I am also building a motor for boost, add my builder to the list who say breaking it in NA is no problem.
To answer your question, I am also building a motor for boost, add my builder to the list who say breaking it in NA is no problem.
so did you shoot a rod through the side of your block also???? lol
i still need to pull my old LS block, the hole from the rod is almost big enough to fit 3 fingers in lol
