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Quest Alternator

Mick

By Mick,
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Mick Mentor

Mick

Posted
Posted

hey my alternator is screwed on my rb25det, i read that people are upgrading with a bigger nissan quest 110a to 120a alternator and they have to grind a hole out on the alternator and make a custom bracket for it to fit on an rb25det.

Has anyone here done this and did they make the bracket or buy one from somewhere?

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t_revz Grand Master

t_revz

Posted
Posted

Do you really need a bigger amp one? They really aren't necessary 99% of the time. Maybe if you had a massive stereo but even then I still think its overkill. Standard ones work fine for almost all applications

discopotato03 Grand Master

discopotato03

Posted
Posted

Quest was an American spec Nissan van/people mover With a V6 VG33 under the lid . We only got that engine in from memory D50 petrol Pathfinders but not the Quest higher output alternator .

Also alternator brackets even on VG's differ depending on what car they came in and whether it was oriented upside down or not - meaning adjuster bracket facing up or down . Late V6 accessories/drives can be a nightmare .

Even so the Quest alternator needs mods and there are write ups on American boards like fresh alloy.com .

The thing people who haven't played with these higher output Japanese alternators often don't realise is that they are larger in diameter than your typical Nissan RB/SR/KA 90s era ones and they can be a pain to wrestle into place like around an RBs lower radiator hose . They are also appreciably heavier than an OE one . Some mite say so what but if you have to drain/refill/bleed cooling systems it isn't a simple R&R anymore .

Also Nissan made life hard by casting the RBs lower alternator mount into the block rather than using a bolted on bracket like the older L series block has . what comes off can easily be replaced with something to suit a non std alternator in an ideal location .

To be honest I solved all my problems by having the std RB25 (33) alternator rebuilt with new regulator and diode pack , and using a larger capacity battery . Admittedly I don't have high demand pumps or sound systems and if I could track down a reasonably priced GTR alternator I'd freshen it up and use that .

BTW when your auto sparky can't find a reference to an R33 GTS25T alternators part number tell them to cross reference EB Falcon six parts because their std alt is internally similar/same . .

I think GTR alternators had an extra 10a output capacity , 90a , and I'm not sure what was internally different probably minor rotor upgrade .

A .

A .

  • 2 weeks later...
Dose Pipe Sutututu Grand Master

Dose Pipe Sutututu

Posted
Posted

brand new Circuit Sports Alternator can be had under 350 delivered from the US when there are sales on FRSport.

They're also 90 amp, not to mention brand new.

Solved all my voltage drops and misfire issues, yay!

turb33gtst Enthusiast

turb33gtst

Posted
Posted

Hi Mick

you can get a ( Advance high efficiency alternator 150amp rating) from www.rhdjapan.com alternator's are not bigger in dimensions than original ones as long as u

quote correct model of vehicle

u have an R33 GTST s2 I see , so u would have to quote for your car / GTS25 ECR33 ( Kouki - 1/96 - 5/98 ) Eng: RB25DET ,

to get correct part they are direct bolt on replacement no drilling extra large holes,

but make sure u have 8mm battery cabling or bigger to carry extra current

your r33 should 8mm standard

only thing bad is that there currently worth between $ 868-00 to $897-00 before freight

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