Time slips-Everything look good?
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Teching In
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Time slips-Everything look good? I have tried leaving from idle and from 3300 and everything in between. I played with timing, fuel, tire pressure. Nothing seems to get it lower. Looking for feedback.
72 chevelle-4000lbs with me.
lq9 engine
78mm truck intake
ported 243 heads
228/232 .598”/.598” 112 LSA +2 advance
1 3/4" headers
4l80e trans
3300 stall
4.10 gears
28" M/T s/s tires
Does this look like everything is running like it should? I do everything on HP tuners.
Thanks, Mark
72 chevelle-4000lbs with me.
lq9 engine
78mm truck intake
ported 243 heads
228/232 .598”/.598” 112 LSA +2 advance
1 3/4" headers
4l80e trans
3300 stall
4.10 gears
28" M/T s/s tires
Does this look like everything is running like it should? I do everything on HP tuners.
Thanks, Mark
Others will have more help to offer I'm sure and hopeful for, but I'd think the converter may be a little on the low side, and with having the ported heads and cam, but smaller inlet and outlets of intake and exhaust it may not be breathing well as it needs to.
What are your air/fuel ratios? What is timing set at?
What are your air/fuel ratios? What is timing set at?
Thread Starter
Teching In
Joined: Dec 2013
Posts: 18
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I agree with the intake being small. I wanted to see what I could squeeze out of the truck intake before upgrading.
I'm also thinking the converter is too tight. I have a free restall for the first year. It will be cool to see how it reacts after its loosened up!
Timing is in the mid-low 20s. I played with it until I got the most mph trap.
A/f is at 13.0. I brought it down to 12.2 and everything in between. Ran fastest at about 23* timing and 13 Afr.
I'm also thinking the converter is too tight. I have a free restall for the first year. It will be cool to see how it reacts after its loosened up!
Timing is in the mid-low 20s. I played with it until I got the most mph trap.
A/f is at 13.0. I brought it down to 12.2 and everything in between. Ran fastest at about 23* timing and 13 Afr.
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Thread Starter
Teching In
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I have also built a cold air intake. The intake air temps were around 130* with the old set-up. I bet they will run MUCH cooler now. I'm finishing a few things up on the nnbs/cold air intake, then i'll tune it and give it another shot at the track before I loosen the converter. I like seeing what improves performance as I go.
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From: Turnin' Wrenches Infractions: 005
I have also built a cold air intake. The intake air temps were around 130* with the old set-up. I bet they will run MUCH cooler now. I'm finishing a few things up on the nnbs/cold air intake, then i'll tune it and give it another shot at the track before I loosen the converter. I like seeing what improves performance as I go.
Don't do that, 28 is fine. The only thing it's gonna do is help traction with a bigger converter.
Thread Starter
Teching In
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I'm going to loosen up the converter up passed 4000.