Small T-28 Question Going To Dyno

[mtwollet]

Question, in about 2 weeks im going to the dyno and would like any helpful feedback.

Originally I had my afc setup the usual, 1k,2k,3k,4k,4400k,5k and so on. It would seem to make sense that if I'm only needing to adjust 3k and up (-spools up at 3k-), to more evenly divide up the rpm point for more fine tuning, ex.( 3k. 3400k. 3800k and so on up to 7400k. Basicly divide the Ne points every 400rpms.

Im still running running the Supra smic, and have a logger, but I will be using the wideband anyway.

My concern is that is 20 psi a wasted effort to tune for around 11.5ish afr on wideband ? or would it be better to drop to 18 psi and tune on that area. Thanks

 

[turbolarry]

Since your on 550's (according to your profile) you are going to need some control down low for idle, but it's fine packing the Ne points where you really need them. May be something like this;
1k, 2k, 3k, 3.6k, 4k, 4.4k, 4.8k, 5.2k, 5.6k, 6k, 6.6k, 7.2k
This is on a S-AFC II right?
In regards to the boost pressure;
What octane fuel do you use? If it's higher than the 91 oct. crap I have to use, try 18psi first, and as long as the motor is happy and there is plenty of fuel crank it up two pounds. If you are stuck on the 91 junk, I wouldn't go past 18 psi without a way of monitoring knock (but that's just me).

 

[mtwollet]

My Bad , the 550's that are on there came out of a dodge stealth I believe, via part numbers. When I owned a LM-1 wideband they operated at 14.7.1 on general crusing, (not boosting) I believe, so I did'nt think there was much worry to tune low band, I had a previous set of Dark Side Racing 550cc injectors that ran rich on both high and low band requiring low band to be leaned out.
Thanks for the rpm settings provided, I'll try those, Im also using 93 octane.

 

[CanadianTSi]

Your HI Settings should not be changing around a lot so I really don't see why its needed.

Say your 5k setting is -18 and your 6k is -20 the S-AFC just averages it out in between so at 5500 you would be at -19.

 

[mtwollet]

Thank You . I'll probably not go crazy with my settings then