Partial Throttle Tune Serious Tuners Only

[swappedcrx]

I have my widebad in and i was wondering what everyone is tuning their partial throttle A/F to. I have a S-AFC and 50 lbs injectors and i was wondering at a cruise on the highway what A/F numbers i should shoot for and maybe what should be my Low/high throttle crossover points. Thanks in advance.

[swappedcrx]

hugh is slow, moving violations, anyone someones gotta know this stuff dont let the FA kids show ya up

[gtune4]

?

[PalmerWMD]

Come on folks dont let him down.Gurus dont be lazy.

Fred..

[SPL Parts]

Partial throttle depends on the map point.

Partial throttle at 6000 rpms can net 2 lbs. of boost, obviously under boost you'd want a rich mixture of about 12.5:1, I'd keep your daily driving mixtures around 13.5:1 for off boost and 12.5:1 for on light boost, full boost pressure you should be down to ~12.3:1 with a .75 deg. retard in ignition timing per lb.

I wouldn't shoot for 14.7:1 just out of safety reason, especially if you don't have tip in fuel enrichment or timing retard.

Factory crossover points are around 40% throttle from low to high I believe. I'd shoot for that or possibly 50% with a safe low map and a laggy turbo.

[swappedcrx]

i went out for about an hour last night and tuned the car for full throttle (the easy part) anyways i shot for a 12.0:1 just for safteysakes and hit right on the money. 11.9 @ 450012.0 @ 550012.0 @ 650011.8 @ 7500ishthis is just until scot can give me a tuning session in tampa.however he said to shoot for a 16.0 burn at a cruise.i get is someof the time like 10 percent throttle at 2500 rpmas i lean into the gas to say pass a car it wanders up to 16.8 or so. thats leaner than i really want needless to say. please someone give me some more advice on partial throttle tuning. i just cant wait for these damn things to get software like ghettodyne or uberdata then i can really get to work.

[Def]

I'd say 14:1 to 15:1 is a good target for REALLY light throttle. Any amount of throttle at all(>20%) and I'd start shooting for 13.5:1 or 13.0:1. I don't know how accurate you can be with the S-AFC, so I'd err on the side of caution(rich).

[SPL Parts]

i went out for about an hour last night and tuned the car for full throttle (the easy part) anyways i shot for a 12.0:1 just for safteysakes and hit right on the money. 11.9 @ 450012.0 @ 550012.0 @ 650011.8 @ 7500ishthis is just until scot can give me a tuning session in tampa.however he said to shoot for a 16.0 burn at a cruise.i get is someof the time like 10 percent throttle at 2500 rpmas i lean into the gas to say pass a car it wanders up to 16.8 or so. thats leaner than i really want needless to say. please someone give me some more advice on partial throttle tuning. i just cant wait for these damn things to get software like ghettodyne or uberdata then i can really get to work.

Honestly a 16:1 ratio is good for something around idle. Even SR's with alot of mods like a rich idle mixture.

In most engines the car will shoot for a 14:1 ratio or so with the 02 sensor engaged at partial throttle. However, like I mentioned before these cars have tip in retard and fuel enrichment, meaning when you depress the accelerator the ECU sudden enrichen's the incoming charge and reduces timing, both of which smooth out as the car clicks into it's high map and ignores the 02. This is there for a reason, if it is not tuned as such into your parameters then you need to tune conservatively else you will run into full throttle studder and possibly detonation when you suddenly floor the throttle.

Tune for a solid 13.5:1 across the board at anything over 2500 rpm. Under that you can afford to use a 14.5:1 ratio.