Ideal Radix A/F ratio?
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Ideal Radix A/F ratio? Curious about the ideal A/F mix for a Radix setup. As you can see by my plugs below (which had 36,000 miles on them), I've been running a little rich on the 'Stock' Radix Superchips tune. Both times I went to the dyno they measured below 10:1 until about 5100 RPM's, so I got a wideband ready to go in and start tuning. Just wondering what A/F I should be shooting for.
Originally Posted by ACPromotions
I might suggest that you go to LS1truck.com and post out for farmtruc, who isn't a sponsor on this board. He tunes Radix based GM trucks very regularly. If I had to guess, he would target between 11:5-11:9.
It really goes by how much timing/intake temp.I like A/F around 11.2-1 on the dyno or 11.6-1 on the street but some heavy vehicles like your's like a richer 10.5-1 A/F to keep the heat down in the cylinder.
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Originally Posted by Slowhawk
It really goes by how much timing/intake temp.I like A/F around 11.2-1 on the dyno or 11.6-1 on the street but some heavy vehicles like your's like a richer 10.5-1 A/F to keep the heat down in the cylinder.
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I shoot for 11.2 to 1 across the band. I achieve 11.0 - 11.2 across the band. Works well for me. I've got 6800 miles on the H2 so far (most of them supercharged). No oil consumption at all (meaning I haven't washed the cylinders with fuel).
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Joined: Apr 2003
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From: Albuquerque, NM
Originally Posted by 2001WS6Vert
Just like a car will detonate more if your going up a hill. The more load, the more likely to detonate. The extra fuel helps to contain the detonation.
The ultimate tuning combo is wideband and EGT probes. Adjust the A/F and watch the EGT's for excess heat.
I would let your KR to the talking, but definitely start out in the 11:1 to 11.5:1 range first. 10:1 is pig rich and probably leaving some power on the table too. Just getting your A/F in the 11's will probably net you 20-30 extra HP alone.
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Originally Posted by ktmrider
Bingo, these rolling bricks take quite a bit more torque ( or load ) to move around. This is why you want to tune for 80% to WOT instead of idle. No loads or small throttle opening doesn't need extra fuel.
The ultimate tuning combo is wideband and EGT probes. Adjust the A/F and watch the EGT's for excess heat.
I would let your KR to the talking, but definitely start out in the 11:1 to 11.5:1 range first. 10:1 is pig rich and probably leaving some power on the table too. Just getting your A/F in the 11's will probably net you 20-30 extra HP alone.
The ultimate tuning combo is wideband and EGT probes. Adjust the A/F and watch the EGT's for excess heat.
I would let your KR to the talking, but definitely start out in the 11:1 to 11.5:1 range first. 10:1 is pig rich and probably leaving some power on the table too. Just getting your A/F in the 11's will probably net you 20-30 extra HP alone.
