ET Slip HP Analysis of VortecPro 650 HP 496cid BBC

[maxracesoftware]

ET Slip HP Analysis of VortecPro 650 HP 496cid BBC

i visted YouTube
and some of the YouTube "recommended" Videos were :
Mark @ YouTube Videos :
VortecPro or Performance Engine Building 101

650HP VortecPro 496 Big Block Chevy - Dyno _ Drag Test - Part 3.mp4
https://youtu.be/tvXaE7N8Qk0

650HP 496 Big Block Chevy - Dyno _ Drag Test - Part 1.mp4
https://youtu.be/OrgvE3jRrjI

so i ran all the ET Slip Data + Race Car info
thru my ET Slip HP Analyst Software i'm working on
and i came up basically that Mark's Engine would indeed make 650 HP as claimed !
( i hope Mark is OK with this ? )


1968 Chevelle SS 3720 Lbs w/Driver
no HoodScoop
496cid 650 HP
9.8:1 CompRatio Pump Gas 91 Octane
#781 Heads 2.190/1.880 121.0 CC Chambers
4.56 Gears
Turbo 350 Trans
12-Bolt
ATI Converter
Hooker 2.000 x 36" long
Edelbrock Dual-Plane Intake Manifold
238deg Duration Hyd Roller
Hoosier Slicks 30" x 9"
11.0" Hg Vacuum @ 6400 Feet Elevation
2-Bolt #289 Block
4340 Scat Crank
6.385 C-C Scat Rod
M77 Oil Pump
Isky Hy Roller 238/248 110 on 106 CL
3/8 Pushrods Comp 3/8 GuidePlates
Moroso Oil Pan
Scorpion Roller Rockers
Mahle Pistons
=========================================
Car # 5257 HPCFF=1.212571358
DA=4772 Feet
Baro=27.88
1.412
4.219
6.617
102.00
8.709
10.509
123.83

DA=5163 Feet HPCFF=1.21338195
Baro=27.82
1.432
4.235
6.638
101.75
8.734
10.532
125.07 <<--- on this 125.07 MPH ... actual ET Slip had only 25.07 not 125.07 ... its a Track's Clock Error for the MPH
however , i entered 125.07 MPH in my simulation just to see if it could be 125.07 MPH ??
, but top-end HP looks wrong versus the other 2 Runs, its climbing -vs- dropping like other Runs

DA=5460 Feet HPCFF=1.261250833
Baro=27.84
1.406
4.216
6.626
101.38
8.731
10.536
124.06

VortecPro_Run#1.jpg

VortecPro_Run#2.jpg

VortecPro_Run#3.jpg

[levisnteeshirt]

Maybe he is sandbagging hoping the farm truck won't find out his true potential

[1980RS]

Mark's stuff is usually spot on and with the barro that low I am sure if he was here were I race the car would be in very low 10's @128mph. Either way I sure would like my car to get in to the 1.40 60ft range.

[vortecpro]

I think its important to mention my setup for the 496 combination was horrible, 4.56 gear, wrong trans gear stack, baro in the 27s, horrible humidity, I knew when I saw the 1.42 60 I was in trouble, I should have never ran that car at that track, but my move to Horse Shoe Bay Tx will put a end to horrible midwest conditions. Stay tuned................

[maxracesoftware]

Post by vortecpro » Mon Sep 27, 2021 9:15 pm

I think its important to mention my setup for the 496 combination was horrible, 4.56 gear, wrong trans gear stack, baro in the 27s, horrible humidity, I knew when I saw the 1.42 60 I was in trouble, I should have never ran that car at that track, but my move to Horse Shoe Bay Tx will put a end to horrible midwest conditions. Stay tuned................

Mark , was the HP falling off Top-End the result of the Hydraulic Roller Cam + Dual-Plane + Cam Spec Durations a little on small side
for RPM Range "after" Peak HP RPM point ???

i saw in one of your Videos you had drawn a graph of HP Curve on black or green board ,
i can't remember if it was the Curve for this 496cid 650 HP engine ??
in that Video , you talked about a different Rear Gear Ratio too .

[vortecpro]

PP DRAG DATA.jpg

peanut port drag test.jpg

Larry

Heres my take: The curve was from the 496 drag test. Right from the launch I blew right past peak TQ and HP, I couldn't pull 2nd gear fast enough, I was @ 7000 RPM instantly, my 2.75 first gear coupled with a 4.56 rear gear was a horrible mis judgement on my part, I think with a 2.50s first gear and a 4.10 would have been much better. Actually I had the car setup for Denver were it ran 10.72 with the 496 in the middle of summer 23.80 baro. Although the 496 peaked @ 6200 on the dyno best pull making no more than 456 measured HP, tested in the summer @ 6388 feet, 23.6s baro I believe, power carry was non existentant surely due to the intake heads and cam. I ran my 9.3 comp 228 @ .050 hyd roller 467 peanut port @ 3720 as well at the same track 3000 DA 27.80 baro? This engine made 584 HP corrected @ 5800 RPM and 570 HP @ 6400 RPM and was run 7000 RPM through the lights. May be you can run this through your program if you don't mind I'd be curious. The time slip. Pictures from my drag tests, along my weight boxes which brings me to 3720 pounds running weight.

Weight.jpg

[EXCELLENCE AUTO]

I think its important to mention my setup for the 496 combination was horrible, 4.56 gear, wrong trans gear stack, baro in the 27s, horrible humidity, I knew when I saw the 1.42 60 I was in trouble, I should have never ran that car at that track, but my move to Horse Shoe Bay Tx will put a end to horrible midwest conditions. Stay tuned................

Let me know if you move to HSB. I lived in that area for about 8 years, and know quite a few folks.

They have an airport up on the hill, and sometimes do 1/2 mile racing. Also used to have Top Fuel Boats come every year to the Lake. But I heard they are not doing that anymore...

[econo racer]

I do not see those passes as a fail. I see 5460 DA. That could have eaten several tenths. And at least your honest by showing it, What ever became of the truck project? 327 or ?

[maxracesoftware]

by vortecpro » Tue Sep 28, 2021 6:44 am
I ran my 9.3 comp 228 @ .050 hyd roller 467 peanut port @ 3720 as well
at the same track 3000 DA 27.80 baro?
This engine made 584 HP corrected @ 5800 RPM and 570 HP @ 6400 RPM
and was run 7000 RPM through the lights.
May be you can run this through your program if you don't mind I'd be curious. The time slip. Pictures from my drag tests,
along my weight boxes which brings me to 3720 pounds

Mark , i get 580.1 Peak HP @ 457 Feet distance

VortecProETSlipPeanutPorts.jpg

VortecProETSlipPeanutPortsData.jpg

ETA_DragStrip_choices.jpg

[vortecpro]

Larry

Thanks for running that for me!

[vortecpro]

I do not see those passes as a fail. I see 5460 DA. That could have eaten several tenths. And at least your honest by showing it, What ever became of the truck project? 327 or ?

I drove it every day before I sent it down to Texas, I will be at Little River racing it in Oct.