KAMRF Variances Bank1 vs. Bank2 (Intro/Long Post)

Covers all sn94/95 mustang v8 ecu's.
decipha
Posts: 6296
Joined: 2021 Feb 15, 12:23
Location: Metairie, LA
Vehicle Information: Work Truck
'25 F-150 5L

Re: KAMRF Variances Bank1 vs. Bank2 (Intro/Long Post)

Unread post by decipha »

the perload histogram just logs perload and throttle position

perload itself is the error percentage since it should be 1.00 at wot. Thus if its only .88 then you multiply the load in fn035 at that rpm by .88 and presto.

No, you can ignore load for perload, best to use actual perload for the correction as described above.

Yeah with the sc restriction about .7 at wot is perfectly fine.
With the sc flowing that should go to about .95
Coz_KB95
Posts: 8
Joined: 2025 Aug 08, 14:32
Location: Toronto, Ontario
Vehicle Information: 1995 Mustang GT -Vert / CBAZA-J4J1: Edelbrock Performer Heads/Crane 2031 Cam/Ported GT40 Intake/Kenne Bell 2.2 ~9PSI/42lb Ford GreenTops/SCT 2400 MAF/BBK Longtubes/H-Pipe/Flowmaster Exhaust

Re: KAMRF Variances Bank1 vs. Bank2 (Intro/Long Post)

Unread post by Coz_KB95 »

Ok, onto the next challenge. Having a bit of a struggle getting Idle Air Dialed in and I had imagined that this would have been the "Easy Part".

Using the 'Arbitrary Values Option' and I get the impression from the behavior of the engine is a bit erratic, its stalling on clutch in coming to a stop. I've smoke tested and can't locate any leaks so I started thinking about something and hoping someone would be able to confirm my logic or slap me out of this unnecessary analysis cycle I'm looping through.

Here goes: While I'm running CBAZA and T4M2 as the base tune and strategy ... I've converted the intake tract to the GT40 Lower and use the Fox-Style TB, TB Cable and of course a Fox style IAC Valve.

Now ... for the GT40/Cobra Lower intake, I had a look in the stock J4J1 ISCTransfer and there are definitely differences between ISC Duty Cycle and Flowrates in FN8000 between J4J1 and T4M2. Now ... with my throttle plate set at what I think is the minimum the car will idle ... and a DSDRPM of 672 ... ISCDuty checks in at .15 steady (because it is up against the min ISC airflow clip). In the T4M2 ISC transfer, that translates into 0.120 lb/min. If I look at the J4J1 ISC Transfer 0.120 lb/min checks in at ~.35, if my interpolations/flow calculations are correct and I believe they are.
Screenshot 2025-09-22 120910.png
Screenshot 2025-09-22 120855.png
To Compound all of this ... I had a look in the A9L2 base tune ISC transfer where .120LB/Min checks in at .28 ISCDuty.
Screenshot 2025-09-22 122858.png
So ... my questions are, which ISCDuty value/transfer is correct and would I be able to port it over? My assumption is that the transfer from A9L2 should be most accurate as the Valve I'm using is a Fox valve. What else would need to change in T4M2 in order to port over the the values in FN800/8000 from A9L2? Am I completely going about this in the wrong way and ultimately the duty cycle doesn't matter?

Thanks in advance ...
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