GM_Chevy_35L_355HP_GDI_12620214 651.0 RWHP

[maxracesoftware]

GM_Chevy_35L_355HP_GDI_12620214
651.0 Chassis Dyno RWHP at 6700-6800 RPM with ProCharger 15.5 Psi Boost

2015 GMC extended Crew Cab Truck
5550.0 Lbs with Driver
stock Converter 2200 RPM Stall
3.42 gears

ProCharger 15.5 psi Boost
Chassis Dyno = 651.0 HP @ 6700 RPM
Dec 11, 2016 4:33PM
Dragstrip
1.831
4.890
7.439 - 96.31 MPH
9.645
11.549 - 117.43 MPH


after new Port work + new Cam Motion Cam specs :
205/219-116 Centers 0.585/0.585 Valve Lifts -VS- original GM Cam Specs = 193/200-113 Centers 0.500"/0.485" Valve Lifts


Out-the-Box Stock Shape Flow Numbers
GDI_12620214 stock 1.932/1.555 Valves




after Rough-Carbide Port Job and Valve Job Flow Numbers
GDI_12620214 same stock 1.932/1.555 Valves

[maxracesoftware]

[maxracesoftware]

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[maxracesoftware]

ETA Simulation

[In-Tech]

Hi Larry,
I assume you meant 5.3L engine. Did you happen to notice this thread showing a cutaway of those heads? http://www.speedtalk.com/forum/viewtopi ... =1&t=50362
I've had some pretty good health issues the last year or so and haven't pursued this project much further. I also anticipate some incredible hp numbers with boost and NA with these port shapes. I really want to work on a set of L86 heads with the larger ports and valves but haven't found a broken one to cut up yet.

[maxracesoftware]

Hi Larry,
I assume you meant 5.3L engine. Did you happen to notice this thread showing a cutaway of those heads? http://www.speedtalk.com/forum/viewtopi ... =1&t=50362
I've had some pretty good health issues the last year or so and haven't pursued this project much further. I also anticipate some incredible hp numbers with boost and NA with these port shapes. I really want to work on a set of L86 heads with the larger ports and valves but haven't found a broken one to cut up yet.

yes i meant 5.3L
i gotta go correct all the FileName now , thanks for pointing out !

and WOW !!! .... awesome sectioned Pictures ... i cannot thank you enough for all those great Pics !!!

i somehow missed that Thread

PS: that's Chris's everday Work Truck
brings all the Engines to Dyno test ... its a sleeper , open the Hood and its very stock looking .
He just Dyno tested a BBC 713cid Sonny Hemi head engine
said a Woman was using her Cell phone taking pics of that engine along Interstate-10
a bunch of people gave him Thumbs Up along I-10

[tt 383]

Ahh, now I know where my Mr. Potato Head lips got to...

[maxracesoftware]

by tt 383 » Sun Apr 29, 2018 11:28 pm
Ahh, now I know where my Mr. Potato Head lips got to...

yeah .... i know

i was in a hurry .. it was either pure White or this nice Red
i went with the Red .

FYI : i retired the Red ... when more of my favorite looking Green-colored Clay sticks came in

PS ; i use GoJo Hand Cleaner ( plain smooth , no Pumice ) to smooth the Clay, and it dries within 1 minute
and as added plus , i can clean off the Clay residue off my Hands before i start typing on the Keyboard on a Flow Test

[pamotorman]

i wonder why the port flow tests are not done with the intake manifold in place as would not that would be a truer reading

[maxracesoftware]

i wonder why the port flow tests are not done with the intake manifold in place as would not that would be a truer reading

Yes ... that's how i always try to Flow test ... but sometimes the Customer will not bring or want to Port his Manifold/Spacer
nor bring his Carb either to Flow test as a complete Induction System !

for SuperStockers + Comp Elim
i always make additional Flow tests with complete Induction System

Note: all other Intake Ports have red rags stuffed into them or either theres Valve Springs/Valves seated in the other Cylinders,
and there's clear tape sealing-off the other side of Intake Manifold

Also : i don't like using Clay Radius Entry that much ... i purchased a bunch of 2x6 and 2x8 and 2x10 boards to make wood Radius Entries

[Carnut1]

I was testing a VicJr.tall on my Dart 215's yesterday and I was using foam to fill other runners. I was not happy with it, I have also used duct tape to seal unused ports. There was a question about flowing with the previous firing cylinder runner open to give a more realistic model. What are you guys using to seal runners and are you flowing through another runner as well? I see Larry said he uses rags, my bench loves to eat stuff like that. Thanks, Charlie

[maxracesoftware]

I see Larry said he uses rags, my bench loves to eat stuff like that. Thanks, Charlie

yeah ... but i use a 3/8ths aluminum rod to ram in the red shop rags into only the Cylinder Head's Intake Ports
still its potentially dangerous with Shop Rags

way safer to just install Springs/Valves on all the other non-Flow tested Cylinders

[Carnut1]

I see Larry said he uses rags, my bench loves to eat stuff like that. Thanks, Charlie

yeah ... but i use a 3/8ths aluminum rod to ram in the reg shop rags into only the Cylinder Head's Intake Ports
still its potentially dangerous with Shop Rags

way safer to just install Springs/Valves on all the other non-Flow tested Cylinders

Thanks, Larry

[HDBD]

Larry, what is the clay you use? Thanks