2.8 hilux injector pump vs 2.8 surf pump

[islandvitara]

Hi all im in a bit of a dilema - ive picked up a 2.8 surf injector pump of a bloke to replace my hilux 2.8 injector pump as i was told its a direct replacement...ive just pulled the hilux pump out and its slightly different to the surf pump?? The part numbers dont match either - hilux has 0.9 48 stamped on it and the surf has 0.9 50...

Is it ok to use this pump or is it not suitable???

Cheers for any help

[oldmate]

Are they the same 3L engine?

If so then they probably will work. THe difference may just be that one has a high altitude compensator on it (big round thing on the top of the pump) and the other doesnt. Or some other doowhacky like cold start advance.

However I've never heard of a standard 2.8 3L surf. I thought they were all 2.4 and 3.0 turbos (and imports)

[Mr DJ]

oldmate is right.
Surfs came in 2.4TD (2LT, 2LT-II & 2LT-E) and 3.0TD (1KZ-TE).
There was a base model Surf available from factory with 2.8 (3L) without turbo and no electrics (4Runner) but very rare, have never even seen a pic of a genuine one myself.

You want the 2LT or 2LT-II fuel pump (does not have an ECU controling the fuel pump) and has a boost compensator (increases fuel as boost rises) and will bolt straight up to your 2.8 (3L) and work if you have a turbo strapped to it.
Will need to increase base fuel a bit due to the extra CC's between 2.4 and 2.8.

If it came from a 2.8 in a Surf, it has been transplanted in there (common) using the factory turbo and 2LT or 2LT-II pump, so would be all ready for you to bolt on and go. Will need the vac lines, etc. to operate the boost compensator.

This diagram of fuel pump may help.
http://www.toyodiy.com/parts/p_J_1989_T ... _2202.html" onclick="window.open(this.href);return false;

[islandvitara]

Yeah it came off a 3L 2.8 surf motor...and yep it has the round thing on top! The pumps are identical besides that round thing...

So will this pump be ok to use? I plan on turbo intercooling the motor in. Few weeks also...

[Mr DJ]

Yes....

[ae86levin]

My Stock LN106R 3L lux has a pump labled 0.9 50 which has an altitude compensator on it. I also have a pump off a 2.4 Turbo from early 80's that has a boost compensator on it which is labeled 0.7 62.
The Altitude comp and Boost comp look very similar. The boost comp has a small inlet on the round 'hat' for a hose to feed boost to it where the altitude comp doesn't.

[islandvitara]

No worries i will just bolt the surf injector pump up tomoro ive marked where the old pump used to be so that should get it close enough to get it running again once installed yeah?


Thanks so much fullas i really appreciate the help

[Stubbs]

So what is the difference between a boost compensator and an altitude compensator, just that the boost uses boost to control it and thats it?
Also is one better to use between the 2-LT and the 2-LT II?

Cheers, Stubbs

[oldmate]

So what is the difference between a boost compensator and an altitude compensator, just that the boost uses boost to control it and thats it?
Also is one better to use between the 2-LT and the 2-LT II?

Cheers, Stubbs

Boost and high-altitude compensators (hac) work much the same. Boost comps. work off the turbo pressure, where as hacs work off atmospheric pressure.

A 2lt original or II version should have a boost compensator, being it's a factory turbo job

3000 meters is where the lack of air starts to affect non turbo diesels, but there isn't anywhere in australia that high that you're likely to drive, so for that reason only some diesels are fitted with the HAC. You're not missing out on anything if you don't have one.