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Jun Oil Pump! What You Guys Think? Please Help!

gdzlar1

By gdzlar1,
in Engines & Forced Induction

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gdzlar1 Proficient

gdzlar1

Posted
Posted

Hey guys originally I was after a tomei oil pump and still really considering one but I've been offered a jun pump for a pretty decent price just depending if he accepts my offer, are they a good oil pump to use ? Any down sides of it compared to the tomei, the more answers the better

Cheers

wedge_r34gtr Mentor

wedge_r34gtr

Posted
Posted (edited)

I have a little bit by the looks of it tomei is too good, I've searched that some of these have shattered

I know of two tomei pumps that have failed - but there was no information as to why they failed (could have a been a crappy install, eaten engine block etc). By all reports Tomei is great pump and these isolated failures shouldn't put you off.

The nitto pump is another great peice of engineering. As far as i'm aware, there has been no reported failures thus far for these. And they have been known to eat engine block and survive :-) Mine is going great :-)

Haven't heard much about the JUN pumps. I know they have been used in some high HP car's with no drama's.

Edited by wedge_r34gtr
tricstar Mentor

tricstar

Posted
Posted

I've got the Jun pump in my RB28, making over 600rwhp, limiter bashed regularly etc etc still going strong...but I think you'll hear that about all the name brand pumps.

So Jun, Tomei, Nitto,etc all a big improvement over the standard one, take your pick.

R31Nismoid Grand Master

R31Nismoid

Posted
Posted

Tomei is the best - simply by design.

The others, all a case of how much do you want to spend. No-one can decide that for you.

That's not to say they are a bad pump, just not the best.

Give any muppet a pump (or a bad build), and any oil pump can be destroyed. Tomei/Nitto/JUN or otherwise.

kitto Mentor

kitto

Posted
Posted

Tomei or Nitto, i'm not sure if Nitto has released their new Spline drive pump or not yet, if they have, get one of those!

The most important thing to make sure you do is fit a crank collar that gives the correct collar to pump drive flat clearance.

I have a Nitto pump and collar on my engine, i came to that decision after months of research.

If i were to do it all again for a track oriented vehicle it would be an external belt driven pump, either wet or dry sump.

GTR_JOEY Grand Master

GTR_JOEY

Posted
Posted

I have a JUN, had no problems and I don't think I ever will.. Tomei is probably the best and I'd buy one if I had to choose again

As stated above, any pump will eventually fail if rev limit bashed enough/bad harmonics or wrong collar clearances

9krpm Mentor

9krpm

Posted
Posted

I've been using Jun pumps for years on the OS giken engine without problem.

Willall racing drag car also used this pump with revs of 10,000+ rpm without any pump issues.

If you can pick it up for under 1k...then that is a steal!

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