One of my best friends is currently finishing up his shopping cart for his build. The car is a '99 Civic Si with a Turbo B16B (JDM Civic Type-R). The engine he is building is a forged B16A2. I saw oil squirter delete and am curious of the consensus of deleting those? In my personal rationale, I'd keep them for the added cooling and lubrication. He researched and said they up oil pressure and aren't really needed on the application. His power goals are around 400whp and doing so around 20psi on a forged bottomend. What is the groups in put?
If the thing came with oil squirters, I'd keep them. If pressure is a concern, I'd rather resolve it with other oiling mods (and if the issue is pump flow, just run a bigger pump).
+1 for keeping them, they're even more useful in a boosted engine than a NA engine.
wae
SuperDork
4/5/18 8:11 a.m.
I am not an expert, but I know that on the Dodge 2.4 they added oil squirters to the block when they put a turbo on it. I can't imagine they'd do something like that if it wasn't needed.
I would not remove them!
Ecotec engines use these and they guys getting 1400 bhp out of them on a drag car sure leave them in there to cool the pistons.
Same thing with 4g63 turbo engines, they had them as well. Increased cooling and lubrication on a high-output build? Another vote for keeping them.
Oil pressure is over rated. That sounds like a wise guy comment but it's true. Back in the '80s we used to do tight clearances, heavy weight oils and high volume, high pressure pumps and we'd have cold oil pressures of over 100psi. Now we know that we were just giving away horse power. It's much more important to have oil where it's needed and only as much pressure as needed. I've built engines that only carry 5 PSI hot at idle and I'm getting the same life out of them as when they were at 40 PSI.
Squirters in boosted engines are a good idea (I've added them to engines that didn't have them originally) and if the rest of the engine is built correctly the oil pressure will be fine.
I would definitely keep the oil squirters. Back when the import tuner mags were around and they did write ups on B series vtec conversions they recommended adding the squirters.
I'm building an aluminum V6 that came with a turbo, but will get a larger one. It has squirters down the middle that squirt the underside of the pistons on the intake side. I'm adding squirters thru the main webs that squirt the underside of the hotter exhaust side. Yes, I'm running a larger pump. I've read that F1 cars have up to 6-8 squirters under each piston.
