dyno time,lets hear the guesses.

[Supercharged111]

Looks like it was still climbing

This, take it back and wind it out the rest of the way. My guess was high 400 for a low 400whp setup.

 

[Malibu795]

This, take it back and wind it out the rest of the way. My guess was high 400 for a low 400whp setup.

Check post #11.
😉

 

[Supercharged111]

Check post #11.
😉

I did, that's why I said wind it out the rest of the way. It looks like it climbed all the way until they shut it down. Doesn't make it any less healthy, but you're going to want that data when deciding where to start on your shift points.

 

[Malibu795]

Yeah. I'd like to see the HP line crest on the graph.

 

[melloelky]

Most people over carb their engine... And it's 524/534 per post #11 😉

FWIW 383 at 6000rpm and 100%VE is roughly 625cfm

100% true,most people over carb/under stall.I'm in the smaller carb camp,I'm not looking to sacrifice the drivability(as i'm no carburetor whisperer) and that 670 vac secondaries treated me very well with the last go round. I'm sure if i spent a bunch of time higher up the bigger carb would prove better but so far the smaller carb has proven to be a better all around set up for ME anyways.

Yeah. I'd like to see the HP line crest on the graph.

x2

 

[Sweet_Johnny]

I'm sure if i spent a bunch of time higher up the bigger carb would prove better but so far the smaller carb has proven to be a better all around set up for ME anyways.

x2

You could always go bigger and add annular boosters... 😀

 

[Malibu795]

melloelky I'm running 650 AVS2 on my 468 and 489 big block Chevys 🫣😂
I need to get a wide band AFR installed.

Having a trans with lockup negates a lot of the over/under stall issues. It would be nice to see companies stop being afraid to lock the TCC in anything other than top gear. GM has been allowing TCC lock up in 2nd gear on all autos since 800 platform went to market

 

[Supercharged111]

melloelky I'm running 650 AVS2 on my 468 and 489 big block Chevys 🫣😂
I need to get a wide band AFR installed.

Having a trans with lockup negates a lot of the over/under stall issues. It would be nice to see companies stop being afraid to lock the TCC in anything other than top gear. GM has been allowing TCC lock up in 2nd gear on all autos since 400 platform went to market

Fixed that for you. 8 lug 400 trucks lock up 2nd at WOT.

 

[Malibu795]

Fixed that for you. 8 lug 400 trucks lock up 2nd at WOT.

I was unaware the 400 trucks had a (tow haul) function.
I've only owned the 455 variation (C3500HD) one with 6.5/4L85 and a 454/NV4500

The auto did have a 17-1800 stall TC in it though

 

[Supercharged111]

I was unaware the 400 trucks had a (tow haul) function.
I've only owned the 455 variation (C3500HD) one with 6.5/4L85 and a 454/NV4500

The auto did have a 17-1800 stall TC in it though

They don't have tow/haul, that's baked into it as it came. Seems geared toward tow/haul though. I know the 4L60 trucks will lock around 70 in 3rd WOT as well, but no 2nd lock for them. Of course with a tune this can all be added or deleted, but was just making the point that GM did lock 2nd way back then.