Flow sheet for LT5 heads

[cuisinartvette]

Has anyone ever seen one or documented what they are box stock/modded?

Would like to know what they do at all lifts.

[jonszr1]

i would get ahold of greg van dev.

[flyin ryan]

Hey , i've been watching what your up to...do yourself a favor & don't get all caught up in 'DRY' flow numbers. save yourself the aggravation. 'WET' numbers, on the other hand, are a different story. Dry numbers, no mixture(fuel), on a steady state bench, no cycles (pulses) as in '4'-stroke/cycle, are so far from the real world of a running engine, a guy can get chasing his tail & spending good money after bad in a hurry. also...when a head gets flowed, is the bore plate being used exactly what diameter that head will see on it's particular engine? usually not. is a duplicate piston, with proper valve reliefs & such, in the bore plate as well when flowing...? it's there in a running engine... lots of short comings to Dry flow benches. i know for an absolute fact that current NHRA Pro-Stock programs/teams use 'DRY' benches for only around 5% of the overall testing & evaluation of cylinder head/intake manifolds. i'm not trying to discourage you...just keep you eyes open & don't completly focus on 'DRY' numbers, that will be the quickest way you will get into trouble. i don't know why but i see so many people get tunnel vision in this regard. just being honest with you...

[cuisinartvette]

Ryan you been on the Dartboard lately?

I hear ya, just looking for a reference point out of curiosityCould make a fixture, bore plate (3.9 or 4.0?) a possibility.
The shenanigans will start at some point in the next month or so.
Keep ya posted.

Btw, got to drive it awhile today nice to take another turn behind the wheel .

[rkreigh]

Originally Posted by flyin ryan

Hey , i've been watching what your up to...do yourself a favor & don't get all caught up in 'DRY' flow numbers. save yourself the aggravation. 'WET' numbers, on the other hand, are a different story. Dry numbers, no mixture(fuel), on a steady state bench, no cycles (pulses) as in '4'-stroke/cycle, are so far from the real world of a running engine, a guy can get chasing his tail & spending good money after bad in a hurry. also...when a head gets flowed, is the bore plate being used exactly what diameter that head will see on it's particular engine? usually not. is a duplicate piston, with proper valve reliefs & such, in the bore plate as well when flowing...? it's there in a running engine... lots of short comings to Dry flow benches. i know for an absolute fact that current NHRA Pro-Stock programs/teams use 'DRY' benches for only around 5% of the overall testing & evaluation of cylinder head/intake manifolds. i'm not trying to discourage you...just keep you eyes open & don't completly focus on 'DRY' numbers, that will be the quickest way you will get into trouble. i don't know why but i see so many people get tunnel vision in this regard. just being honest with you...

I had this same conversation with a very experienced head porter. flow "quality" swirl, turbulence and all kinds of things affect a good head.

velocity, tumble, fuel shear, all kinds of issues and yes to be sure wet flow

let the rwhp do the talking and leave the flow bench to the bench racers.

[Zr1 Destroyer]

Originally Posted by flyin ryan

Hey , i've been watching what your up to...do yourself a favor & don't get all caught up in 'DRY' flow numbers. save yourself the aggravation. 'WET' numbers, on the other hand, are a different story. Dry numbers, no mixture(fuel), on a steady state bench, no cycles (pulses) as in '4'-stroke/cycle, are so far from the real world of a running engine, a guy can get chasing his tail & spending good money after bad in a hurry. also...when a head gets flowed, is the bore plate being used exactly what diameter that head will see on it's particular engine? usually not. is a duplicate piston, with proper valve reliefs & such, in the bore plate as well when flowing...? it's there in a running engine... lots of short comings to Dry flow benches. i know for an absolute fact that current NHRA Pro-Stock programs/teams use 'DRY' benches for only around 5% of the overall testing & evaluation of cylinder head/intake manifolds. i'm not trying to discourage you...just keep you eyes open & don't completly focus on 'DRY' numbers, that will be the quickest way you will get into trouble. i don't know why but i see so many people get tunnel vision in this regard. just being honest with you...

I would love to send a set of lt5 heads/ih/plenum to MBE for shits n giggles.......they would be able to get some serious power from these!

The current heads on my zr1 flowed 338cfm........nj got his to go over 400 cfm and his z hits phuckin hard, it's just to bad nobody drives her anymore...lol!

[Zr1 Destroyer]

Here's some pics of nj flowing his heads!