Nice work Andrew, and tuned to 1200 . I would never consider a 1300 tune as safe no mater who said it's safe. Sorry not trying to stir the pot or belittle anyone but that leaves no margins for the hills and mountain passes we have around here..
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Another trick in setting the pump up is to remove the aneroid pin completely, set boost level on turbo and adjust main fuel screw to desired afr target at max power. Well, torque really. I tune mine at 2000rpm with this method, but you should check how the afrs change with rpm at full throttle, as intercooling efficiency, turbo efficiency, air filter restriction and pump condition (as it affects the fueling vs rpm curve) all contribute to how the afrs change over rpm with boost set to 14, 25 or whatever you run. Then don't touch the main fuel screw again.
Here are a couple vids on you tube dealing with the android pin and boost comp spring setting. You'll see in the second video he uses paint pen on the fuel pin to show the travel of the follower pin
Have you checked with @Akella?As it turns out, the HDJ81 I've been helping a friend with has a ground aneroid pin in it also. He'd like to go back to a regular OEM pin or equivalent. Anyone know where you can buy one? I did some part number digging and found the early 1HDT pin part number is 22321-17140. The later 1HDT is 22321-17420. And the 1HDFT is 22321-17840. I can't find stock anywhere. I did find stock on some other Toyota pins though (for the L series motors).
Have you checked with @Akella?
For all you Tuning freaks out there, I have just done a 1hd pump for a raddcruisers customer that I am quite happy with.
Customer bought a gturbo and was looking at upping the pump to 25psi calibration.
The trouble is with the stock setup, it is very difficult to get the pin to its fully topped out state.(fattest part.)
The wedge is in the way, the diaphragm washers are in the way..... Limited adjustability and very annoying when trying to set up for increased fuel and boost.
I have modified the top cover and diaphragm washers in such a way that you get max upward travel of the pin, to yield full use of the entire profile, with added off-boost adjustment via an actual smoke set-screw.
I will ask Bryan at radd to send me photos, because I'm an idiot and didn't take any....
Anyways. The fuel delivery came out very nice.
1000 ERPM no boost - 7.5cc +1 (almost stock)
2200ERPM no boost - 9.5cc +1 (stock)
2200 ERPM 5psi -11.5cc (damn near stock)
2200 ERPM 10 psi - 12.9 (just above stock)
2200 ERPM 15 psi - 16.2cc (about +20%)
2200 ERPM 20 psi - 18cc (about +30%)
2200 ERPM. 25+psi - 20-22cc max fuel with another 15-20% in reserve for further tinkering if desired.
This was a pretty conservative setup, and the starting fuel needed to be dropped a bit since it was over excessive...
I just wanted to point out the limitation of the factory top cover, haven't been on in awhile and figured I'd toss out some numbers. Hopefully i ll get the photos and show you guys what I mean.
Cheers
As it turns out, the HDJ81 I've been helping a friend with has a ground aneroid pin in it also. He'd like to go back to a regular OEM pin or equivalent. Anyone know where you can buy one? I did some part number digging and found the early 1HDT pin part number is 22321-17140. The later 1HDT is 22321-17420. And the 1HDFT is 22321-17840. I can't find stock anywhere. I did find stock on some other Toyota pins though (for the L series motors).
Have you checked with @Akella?
I'm in the process of gearing up to install a turbo onto my HZJ105. Standard pump, no boost compensator.
I'm looking to maximise peformance using the stock pump, not going to pour dollars into a custom built pump at this point in time.
Has anyone sourced an oem boost compensator, or an alternative?
anyone fitted one to a stock pump? Any pitfalls or tips you can share?
toyodiy show a compensator to suit the IP in my vehicle (see attached screen shot), I can't identify a source at this stage.
Shweeeet! Will chase it up. Cheers