who can remote tune a 17 6.2l
12-06-2019, 07:58 PM
#32
The shift points and mines got a horrible stumble on the 1-2 shift (you can see it in the video) where it feels like it's hitting a limiter and cutting power or something. Tuner said it's all good but I'm not so sure. I'm waiting on my bonus and I'm buying HP pro and I'll have atomic help me with it.
I'd love some 3.90s but I'm not dropping $3000 on gears(4wd) for this truck.
I'd love some 3.90s but I'm not dropping $3000 on gears(4wd) for this truck.
And **** I hear ya, I was looking at 3.90's the other day and I think it was like 900 just to buy gears and bearings for the rear, that just the damn gears and bearings.
Not sure, I've just taken all my LS junk to 6500-7000 on stock springs in the past so figured it would work out with this motor too. When the valves start to float it'll nose over, so one of us just have to rev our **** until that happens lol. I wouldn't be afraid to try 6500 myself, but I don't see a reason to go over 6300 ish. I would rev it higher if it had a piece of **** gear ratio 4L60 in it and needed more help with the next gear.
12-06-2019, 08:26 PM
#33
TECH Junkie
God I remember doing new 4.10's and a perfect used eaton posi with 200 miles installed for $850 on my 07 4wd in early 08. Didn't realize!
12-06-2019, 08:40 PM
#34
Without a stock truck dyno graph to look at right now I'd wonder how far off the torque falls past peak torque at ~4,100rpm.
The stock shift points and where it grabs the next gear is already past peak torque but in between the torque and horsepower peak of ~5,600rpm. Is it hurting anything to run it out more, probably not but it is really gaining you anything either is what I always want to know.
I do agree that going higher than the 5,600rpm is still something worth doing as going right up to around 6,000rpm is still staying at a good horsepower level because it's not going to drop off at all in 400-500rpm.
I'm sure GM picked those shift points based on the spec'd power output, gear ratio and transmission gearing.
The stock shift points and where it grabs the next gear is already past peak torque but in between the torque and horsepower peak of ~5,600rpm. Is it hurting anything to run it out more, probably not but it is really gaining you anything either is what I always want to know.
I do agree that going higher than the 5,600rpm is still something worth doing as going right up to around 6,000rpm is still staying at a good horsepower level because it's not going to drop off at all in 400-500rpm.
I'm sure GM picked those shift points based on the spec'd power output, gear ratio and transmission gearing.
12-07-2019, 01:04 PM
#36
TECH Junkie
12-08-2019, 06:40 PM
#37
TECH Fanatic
I would be careful running stock spring up to high on a L86. After I broke the valve spring in mine. I did some googling and it’s more common than you realize on L86’s and LT1’s.
i was trying to shift at 6,000 then. But it didn’t break on a wide open run. I was just cruising down the highway when it let go.
i was trying to shift at 6,000 then. But it didn’t break on a wide open run. I was just cruising down the highway when it let go.
12-08-2019, 07:04 PM
#38
Without a stock truck dyno graph to look at right now I'd wonder how far off the torque falls past peak torque at ~4,100rpm.
The stock shift points and where it grabs the next gear is already past peak torque but in between the torque and horsepower peak of ~5,600rpm. Is it hurting anything to run it out more, probably not but it is really gaining you anything either is what I always want to know.
I do agree that going higher than the 5,600rpm is still something worth doing as going right up to around 6,000rpm is still staying at a good horsepower level because it's not going to drop off at all in 400-500rpm.
I'm sure GM picked those shift points based on the spec'd power output, gear ratio and transmission gearing.
The stock shift points and where it grabs the next gear is already past peak torque but in between the torque and horsepower peak of ~5,600rpm. Is it hurting anything to run it out more, probably not but it is really gaining you anything either is what I always want to know.
I do agree that going higher than the 5,600rpm is still something worth doing as going right up to around 6,000rpm is still staying at a good horsepower level because it's not going to drop off at all in 400-500rpm.
I'm sure GM picked those shift points based on the spec'd power output, gear ratio and transmission gearing.
I would be careful running stock spring up to high on a L86. After I broke the valve spring in mine. I did some googling and it’s more common than you realize on L86’s and LT1’s.
i was trying to shift at 6,000 then. But it didn’t break on a wide open run. I was just cruising down the highway when it let go.
i was trying to shift at 6,000 then. But it didn’t break on a wide open run. I was just cruising down the highway when it let go.
FFDP, here is a dyno of a stock L83 cam on an engine dyno... from texas speed
Last edited by 00pooterSS; 12-08-2019 at 07:11 PM.
12-09-2019, 09:54 PM
#39
TECH Junkie
It was the injectors. I was pretty much out of fuel with the stock L83’s. No way e85 was even an option before the LT4’s. Walbro 340 external on a hobb switch set at 5 psi. Armageddon Turbo has a low side in tank 460 or 465 that I would if they had had it before I would have just done that. That should be enough low side for 900 to 1k on the low side even on E85.
The following 2 users liked this post by ZO6Ted:
hunterbohanan23 (12-09-2019),
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