After reading some posts I saw that alot of people use vtec oil pumps for their ls/vtec and all motor ls swaps. Upon further research I noticed that the 91 ls oil pumps have two rotors and a cover that go inbetween the block and the pump. These rotors are absent on the 94+ vtec oil pumps. Will the newer oil pumps work with my ls or will I have to stick with the ls oil pump.
Here is a picture of the type r


and here is a picture of the 91 ls

 

you can use the 98 and up itr pump just need the lower timing belt cover or just 94-95 vtec pump will work as well

 

just get a 94-95 gsr pump and get the same performance without the hassle

 

my main concern is the rotors that are on the backside of the ls pump. the 94-95 pumps dont have those either. is that going to be a problem and what exactly do those rotors do?

 

dont worry about it, it works fine

the new oil pump comes with the gears

 

ok then i will go ahead and get a 94-95 gsr oil pump and it will work with no modifications correct. thanks to everyone for all your help

 

use a 98 + itr pump.. they are better then 94/95

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Blind Fashion &raquo;</TD></TR><TR><TD CLASS="quote">use a 98 + itr pump.. they are better then 94/95</TD></TR></TABLE>

look at the part numbers
they are the same

 

trust me on this after 98 they changed the pumps

 

just out of curiosity does anybody know what those rotors in the back of the ls pump do and why arent they in the 94-up ones???

 

Those are there in the picture so you can rebuild the old pump and not having to buy a whole new oil pump....

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by skelly ed666 &raquo;</TD></TR><TR><TD CLASS="quote">Those are there in the picture so you can rebuild the old pump and not having to buy a whole new oil pump.... </TD></TR></TABLE>

turn but maybe he is thinking of putting the foot downt he pedal more and u need to keep that oil flowing
and if u can get more at the same price of a LS one

why not
a small upgrade doesn't hit anyone

 

more on this, what exactly do you need to replace if you put a newer oil pump on a b18a? just the lower timing belt cover? also, would a 99 gsr windage tray and pickup work on a b18a?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ragerized &raquo;</TD></TR><TR><TD CLASS="quote">more on this, what exactly do you need to replace if you put a newer oil pump on a b18a? just the lower timing belt cover? also, would a 99 gsr windage tray and pickup work on a b18a?</TD></TR></TABLE>

The newer style oil pump will bolt to the block without any trouble. You will need a new lower timing cover, and I suggest getting the cover gasket as well (the old one will work if you cut it up, but ... ). This pump is cheaper than the 94-95 GSR pump. I think even with the new cover I still saved a few bucks.

You can use the tray and pickup if you have a block girdle and a GSR oil pan. It will bolt to the stock locations on the block.

I run all of these parts on my 91 B18A without problems.