Maniacmechanic1
solid fixture here in the forum
Information on all transmission that I have not seen or found anywhere else.
What you're saying makes sense now,That takes care of just the power brakes Grumpy.
Not the 4L80E.
Reason why the Vacuum modulator takes the place of the Line pressure control solenoid EPC.
Has to follow a smooth linear curve.
Or the Clutches will slip.
Steady predetermined line pressure rise.
Could go full line pressure.
May beat up the aluminum cases 4L80e to death.
Turbo 400 has the aftermarket REID CASE for Severe duty applications.
Constant lime pressure.
I have never worked with a Pro Comp Belt drive.What you're saying makes sense now,
I may have not had enough vacuum to begin with.
I say this because if you're in 2nd gear
And slam it back in to 1st it hits hard
But 1st to 2nd and 2nd to 3rd and 3rd to 4th fine , I always made sure to be completely stopped (let's say at a stop sign) completely stopped then shift to first, it wasn't a big deal to me I didn't run around slamming it into first all the time.
I had transmission built as you know,
So might get some answers from the guy today as to what and how.
And that as my buddy says is hot rodding
Degreed cam, cheap procomp belt drive
Off a tooth , you line dots up it's off 10 degrees you jump one tooth on top gear
It seems to come right in, you guy's seen anything like this before?
Terrible Review.Found a review from jeg's
SBC but it's similar issue
I will break out calculator
Do some ciphering
The most important part of the whole thing is cam nose adapterTerrible Review.
Man.
Oh my plan was just that.ProComp chinese junk needs r&d or correction every time you have to pay close attention when using catch simple problems. Many have had success many have not. Speedmaster or ProComp have mixed reviews all over the net. Eyeballed the belt drive but thought cost to fix issues it would cost.
Here's what my phone app came up with ,somethings very wrong with the soft ware , and the predicted torque curve plots!
Ive built too many similar 489-496-502 BBC and used similar cams to both listed, examples,
the difference should be about a 30ft lbs loss in off idle torque and about a 35-45 hp gain,
in the difference with the crane roller cam vs the howards cam timing.
neither cam would post well below 350 ft lbs at 3000 rpm or anything close to that low. and
both curves should look far closer to this one you originally posted
theres got to be some data thats input incorrectly, or the soft wares not accurate
look heres an actual dyno print out of a similar 496 oval port bbc
heres a different 496 BBC
heres a third 496 BBC example
496 BBC 876hp
Thought some of you guys would like to see this.
496 BBC
280/290 799/775 lift, 113 LSA
13.5-1 compression
Milodon oil pan
2927 ported manifold
Stock 1050 HP carb
Massaged 335 AFR's cylinder heads
Titanium Valves
http://www.speierracingheads.com/
related build info
notice not one build of a 496 BBC has a similar off idle lack of torque
https://www.hotrod.com/articles/0806phr-chevy-496-big-block-engine-build/
http://www.superchevy.com/how-to/project-cars/sucp-0312-496-street-bruiser/
http://www.superchevy.com/how-to/project-cars/sucp-0901-496-chevy-big-block-build/
http://www.superchevy.com/how-to/engines-drivetrain/1005chp-496ci-engine-build/
http://www.superchevy.com/how-to/en...estech-performance-496-chevy-big-block-build/
https://www.hotrod.com/articles/big-block-chevy-engine-build/
VE=115%.Here's what my phone app came up with ,
I did one of your cams to Grumpy
Bad thing is it has no curve
Looking at a 2800 3200 lock up converterhave you considered the Electron Controller for the tarnsmission and vacuum pump for the brakes or hydroboos system
I have build 4l80e and i did have to drop line pressure so it wont bang the gears in cruise speeds
Also transco vacuum modulator can bee adjusted