My planned setup is b20b with phk pistons, stock b20 rods/crank with arp studs, and semi built gsr head. max rpm of 8200.

This motor needs to be extremely reliable and will be in a daily driver. It will also see some track racing during the summers. Not really built for drag racing.

here's my question, using the stock b20 rods, I have read that they are hollow and oil travels up through the rod to lubricate the wrist pin.

I've also read that it is difficult to install oil squirters on a non-vtec block.

Does the amount of oil that travels to the wrist pin through the rod compare to that of the oil squirters found on the vtec blocks??

Is wrist pin oiling something that I need to worry about? I know on drag cars it's not that big of an issue, but this motor will be road racing for 20-30minute periods every now and then. Will it last?

This is an important decision because if the oil squirters are needed for road racing, I might just get a gsr block instead. but I would prefer the extra displacement.
thanks guys

 

imo, for road racing abuse go with a gsr block ... put some ctr pistons in there and it will be good enough.

the oil squirters are more for cooling although it does lubricate some, its main purpose to cooling on the bottom of the pistons.

as for the ls and b20 vtec conversions, the stock rods don;t take too much high rpm abuse, most of the people I've seen who converts to it think it can take the high rpms of b16/its/gsr blocks but it does not ... the bolts are weak, the bearing journal size is wider and therefore more "contact area" therefore more oil required ala high oil pressure. most of the trouble is with spun rods on the frankies.

greg

 

he's got a gsr head though, cheetah.
won't that be scary with ctr slugs?

 

I can always go with itr slugs instead. Anybody else want to comment on this? I already have an LS swap in my car, and I'm looking to start my buildup now so that it might be ready during the summer

 

I don't think the b20b rods have forced pin oiling.I think your talking about the prelude engine like a b20a5.No need for oil squirters.The pins get oil of the oil ring and spray from the rod bearings.
Glenn

 

I was told that the LS/B20 rods have a hole down the middle of the rod that the oil travels up through.. maybe I've been misinformed however. I think I'm gonna go a head and get a b18c block and go that route, might cost more money and have less power but it'll be reliable

 

bump just because I want a little more input on this.. still kind of debating whether or not to spend the extra on a gsr block

 

If you are super worried about using a Ls block, just save for the Gsr. I am currently building a ls/vtec setup, all the friends i had have used ls vtec and have never had a problem, one friend had spun his ls bottom end with stock rods with arp bolts to 10k like 10+ times. The nice thing with Bigger displacement motors is that power is made lower than say a b16, so high rpms aren't really needed in mild builds.

8200 redline, i personally wouldnt worry about it.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CHEETAH &raquo;</TD></TR><TR><TD CLASS="quote">
the oil squirters are more for cooling although it does lubricate some, its main purpose to cooling on the bottom of the pistons.

greg</TD></TR></TABLE>

just curious, what type of engine failure occurs when the pistons get to hot? are we talking about melting a hole in a piston even though I'm staying NA, or are we talking about increased piston ring wear, or maybe ringlands?

just curious