K'fish model number?

[mac]

As the title says, 

What K'fish is used on the Turbos?

Not the same as a Tii.......

 its got 7.5 plungers, but

anybody know the K'fish model number? 

TIA, 

 

Mac. 

[Einspritz]

Yes

[Preyupy]

Not off the top of my head.  I can check one of mine and get the numbers.  

[Einspritz]

PL04- 124.05 A1

[dlacey]

On 3/3/2023 at 11:35 PM, mac said:

Not the same as a Tii.......

tii pump responds to throttle position and engine speed, turbo pump works with throttle position and manifold pressure. Actually easier to setup than tii, because it's far less sensitive to linkage alignment...

[Einspritz]

Sorry Dave, I'll disagree with you there.

 

Where the Tiis setup is linkages, TB cam, idle mixture, idle speed stop, the Turbo adds an additional idle mixture/ off boost (vacuum) mixture at the altitude compensator.

 

They are all interrelated, so change one and the others change, particularly if there is wear in the throttle cam (D cam) shaft or the distributor curves - for both at vacuum and boost are not within spec.

 

The challenge is getting the partial throttle under vacuum or partial boost.

[dlacey]

I agree that the altitude compensator requires carefull setting....but the tuna can adjustments on a turbo only affect idle speed, they don't affect mixture. On a tii the system is "dumb" - the pump throttle lever and the throttle butterfly must be carefully synchronised to get the mixture right...then that sync carefully maintained across the full range of throttle movement...wear in linkage, bushes or D cam throws-out the sync/mixture and it can't be adjusted without pushing the problem somewhere else in the throttle range.

By comparison, the turbo pump is measuring manifold pressure directly (it really is 'smart'/dynamic), so whatever happens with wear or tuna can settings results in a change in manifold pressure and the pump regulates mixture accordingly...if the D cam wears or the linkage lengths change, the engine speed might change but the mixture stays good.

Having worked with both, I feel the turbo is easier to setup and far less sensitive to linkage adjustments. Set the full throttle mixture with the verboten screw, set the idle mixture with the altitude compensator and that's it,. No need to worry about anything else... That's my experience anyway 🙂

 

 

[Einspritz]

We'll just have to agree to disagree.

 

Having to have tuned my engine with race gas for the track ( optimal), with 91 octane 15% (or more) ethanol to pass SMOG at 1% CO across the board, or with 91 Octane for street use, it's more complex than that.

 

Constant monitoring with %CO and knock sensors validate it for me. Sure, WOT and full load you adjust at the pump, depending on the fuel, but it's getting the mixture right at partial throttle under vacuum and also then under partial boost that the fine tuning comes in for me. Then, within that, a smooth idle.

 

Having a log of pump output curves, setting changes and effects is a good thing to obtain the best performance regardless of Tii or Turbo in my opinion, as here the composition and thus fuel density changes seasonally. It's a good reference everyone should have.

 

As an aside, in observing all the complaints about exhaust manifold and turbine cracking and my experience, (I used to have that, as did the original PO) is due to a lean running engine.