Oil pump ? for the B series gods...
#11
Re: Oil pump ? for the B series gods...
Ok, so far this is what i've dug up...took my LS pump apart and compared it to a gsr pump my friend had...the spring is the only difference between the 2 pumps. I didn't really see a spacer on the LS pump, only a metal ring to seal the plug in. Maybe the b18b's have the spacer to up the psi a little, but the b18a1 didn't have one. Actually, by the way it's designed, if you add a spacer to the spring, it should increase the spring tension and therefore make it put out a higher psi before it opens the valve. From what i can see of the design, think "granger valve" mbc design. Supposedly though according to my friend and his fellow honda hoodlums, the real deal type-r pump has not only the increased spring rate, but an increased volume as well.
#13
Re: Oil pump ? for the B series gods...
Originally Posted by MADMAX
The shim should've been in the VTEC oil pumps. The shim raises oil pressure.
#14
Re: Oil pump ? for the B series gods...
Someone mearly stated that the LS oil pump had a shim in it. I meant that if the spring rates were the same, then the vtec oil pumps would have the shim to raise oil pressure. I've seen people add shims to VTEC oil pumps to raise pressure as well.
#18
Re: Oil pump ? for the B series gods...
Originally Posted by snatch10psi
Not true...its because the rod bolts are weak they strecth and bam you got yourself a spun bearing...look at the torque specs between b18a/b and all other b's different metals dont ask why honda did it but put some arp rod bolts in it and its all better
A broken rod bolt manifests differently from a spun bearing. Sometimes you get a little stretch (before breaking) that causes the edges of the bearing shells to dip inward and grab the crank + spin, but in that case you'd also see a good number of broken LS rod bolts accompanied by good bearing halves hanging out in the oil pan. You don't.
The different torque specs are due to different size rod bolts. Welcome to metallurgy.
I've seen a couple of early ECHC engines, B20B/Z, with stock LS rod bolts revving to 8500 daily, making good power, over 50K miles on engine beaten on by late teens/early 20-somethings with no restraint. Most had shimmed, or VTEC, oil pumps.
See where I'm going with this?
#19
Re: Oil pump ? for the B series gods...
Sorry i didnt reply was busy. But yeah the ls pump has a shime in-between the allen bolt and the pump itself so that there is more spring travel ,hence a lower spring rate and less oil pressure. That is the reason it isnt adequent enought for vtec engines. No, from what all i seen all the spring part numbers for all b series pumps are they same. its just the washer thing in between the allen screw/bolt thing
http://www.team-integra.net/forum/di...g+Common+Topic
That will clear it all up enough guys and sorry for all those who kicked out the seroius cash for the TYPE R oil pump :/
http://www.team-integra.net/forum/di...g+Common+Topic
That will clear it all up enough guys and sorry for all those who kicked out the seroius cash for the TYPE R oil pump :/
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