427 Build And Drag Test

[vortecpro]

Have you ever run a QJet with your air bonnet on?

The 2006 date on the dyno sheet is interesting.

Yes, right now my air T has a ring on it for testing 4150 carbs. I don't bother to set the date on my dyno, it has a default setting. Maybe I can take a picture of my Turbine setup and post. Hers a picture you can see the ring on the bottom of the turbine. One other thing I'd like to point out to YOU, notice how I post dyno data

[motormonkey]

Nice. Other than weight, those gm cast highrise intakes weren't that bad compared to some aftermarket intakes. I liked the square carb pattern better tho.
Are you going to run the cast exhaust for the full sleeper effect?

Yes its heavy........this build was about using parts I had lying around that ordinarily would have never been used, I like projects, now I have this complete engine and I kinda like it! Thats how the 327 shop truck was built as well.

I don't know if you did or not, but theirs some to be had porting and or removing material on the carb pad of those intakes.
Have you tried smaller headers on that engine?
I'm a fan of reusing underated OEM/take off parts that work but don't warrant the trash just yet. Good stocker class stuff.

[maxracesoftware]

Thanks-not sure about that 120 mph though.

for a 11.000 ET it could Run these times/mph :

60= 1.472064 43.381176
330= 4.407033 78.812857
660= 6.923479 97.181471
1000= 9.121505 111.648284
1320= 11.000000 119.531990
..... pretty close to 120.00 MPH

[bob460]

I would like to know how you pick best converter and gears in this low rpm build.

[vortecpro]

Nice. Other than weight, those gm cast highrise intakes weren't that bad compared to some aftermarket intakes. I liked the square carb pattern better tho.
Are you going to run the cast exhaust for the full sleeper effect?

Yes its heavy........this build was about using parts I had lying around that ordinarily would have never been used, I like projects, now I have this complete engine and I kinda like it! Thats how the 327 shop truck was built as well.

I don't know if you did or not, but theirs some to be had porting and or removing material on the carb pad of those intakes.
Have you tried smaller headers on that engine?
I'm a fan of reusing underated OEM/take off parts that work but don't warrant the trash just yet. Good stocker class stuff.

I ran it as produced stock, but I'am sure theres more there by cutting out the divider and moving the carb forward, but actually I need to utilize the power I have now first. Very happy with what I have so far, remember the cams the cork right now.

[vortecpro]

I would like to know how you pick best converter and gears in this low rpm build.

I really need to think about this, I will let you know.

[vortecpro]

Thanks-not sure about that 120 mph though.

for a 11.000 ET it could Run these times/mph :

60= 1.472064 43.381176
330= 4.407033 78.812857
660= 6.923479 97.181471
1000= 9.121505 111.648284
1320= 11.000000 119.531990
..... pretty close to 120.00 MPH

Larry

I've run 11.04 @ Denver with my peanut port in this Chevelle, here were the numbers I remember:

1.44
6.86
11.04 @ 118

Same setup @ Pueblo:

1.42
660 ?
10.90 @ 119

[maxracesoftware]

by vortecpro » Tue Jan 12, 2021 8:30 pm

Larry

I've run 11.04 @ Denver with my peanut port in this Chevelle, here were the numbers I remember:
1.44
6.86
11.04 @ 118

Same setup @ Pueblo:
1.42
660 ?
10.90 @ 119

Code: Select all

some NHRA ET Slip info from my Database :

SS/KA 1.493 4.385 6.861  99.27 9.029 10.889 120.17
GT/QA 1.427 4.369 6.872  98.03 9.047 10.891 122.19
GT/QA 1.425 4.377 6.889  98.63 9.072 10.923 121.54
--------------------------------------------------
C/SA  1.478 4.414 6.929  97.05 9.129 11.001 120.14
D/SA  1.485 4.417 6.935  97.53 9.132 11.001 119.97

its possible to Run somewhere within these Ranges :
( if i had all the ET Slips Feet increments + MPH , i could do a more accurate prediction on MPH @ each incremental )

60= 1.457153 43.753919
330= 4.368187 79.474598
660= 6.862108 98.077220
1000= 9.039426 112.717880
1320= 10.900000 120.688077

60= 1.472064 43.381176
330= 4.407033 78.812857
660= 6.923479 97.181471
1000= 9.121505 111.648284
1320= 11.000000 119.531990

60= 1.478036 43.229760
330= 4.422842 78.547675
660= 6.948225 96.831249
1000= 9.154445 111.231671
1320= 11.040000 119.083272

60= 1.440000 42.656863
330= 4.422842 78.904208
660= 6.860000 97.603485
1000= 9.154445 108.947708
1320= 11.040000 121.258906

[tenxal]

Yes, right now my air T has a ring on it for testing 4150 carbs. I don't bother to set the date on my dyno, it has a default setting. Maybe I can take a picture of my Turbine setup and post. Hers a picture you can see the ring on the bottom of the turbine. One other thing I'd like to point out to YOU, notice how I post dyno data

Thanks for the pic, Mark. Always nice to see how others are doing things. As to dyno data, I'm always hesitant to post exact numbers as there's nothing more tweaked, massaged and misunderstood. As to results, mid 10.90's (10.94, 10.95, 10.96 and 10.96) @119.20-119.80, 3,150 lbs, DA of 2,500, uncorrected baro of 28.9, 40% humidity, 74 degrees temp and an 8-10 mph. quartering wind from 11 o'clock and 6.5% convertor slippage will get you pretty close.

Hope all is well and you're safe and healthy.

[vortecpro]

Yes, right now my air T has a ring on it for testing 4150 carbs. I don't bother to set the date on my dyno, it has a default setting. Maybe I can take a picture of my Turbine setup and post. Hers a picture you can see the ring on the bottom of the turbine. One other thing I'd like to point out to YOU, notice how I post dyno data

Thanks for the pic, Mark. Always nice to see how others are doing things. As to dyno data, I'm always hesitant to post exact numbers as there's nothing more tweaked, massaged and misunderstood. As to results, mid 10.90's (10.94, 10.95, 10.96 and 10.96) @119.20-119.80, 3,150 lbs, DA of 2,500, uncorrected baro of 28.9, 40% humidity, 74 degrees temp and an 8-10 mph. quartering wind from 11 o'clock and 6.5% convertor slippage will get you pretty close.

Hope all is well and you're safe and healthy.

Thank for all of that. In the past I've proved dyno data from one SF to another SF dyno properly calibrated is very close, infact 1 hp going from 6400 feet elevation to 800 feet elevation on a 660 HP engine, and these weren't my tests these were Super Flows tests. So that being said, I believe none of the above, I believe you think your on to something and are very secretive, now does that make you a bad person, NO. I enjoy your car build and testing and you as well, really. You have to understand I live for that data, and get very frustrated when I can't get it, so maybe I'am the problem-but I don't think so. I know exactly how much power your 327 makes. Hopefully you won't be to offended, because I like our give and take, but I had to say what was on my mind.

[vortecpro]

by vortecpro » Tue Jan 12, 2021 8:30 pm

Larry

I've run 11.04 @ Denver with my peanut port in this Chevelle, here were the numbers I remember:
1.44
6.86
11.04 @ 118

Same setup @ Pueblo:
1.42
660 ?
10.90 @ 119

Code: Select all

some NHRA ET Slip info from my Database :

SS/KA 1.493 4.385 6.861  99.27 9.029 10.889 120.17
GT/QA 1.427 4.369 6.872  98.03 9.047 10.891 122.19
GT/QA 1.425 4.377 6.889  98.63 9.072 10.923 121.54
--------------------------------------------------
C/SA  1.478 4.414 6.929  97.05 9.129 11.001 120.14
D/SA  1.485 4.417 6.935  97.53 9.132 11.001 119.97

its possible to Run somewhere within these Ranges :
( if i had all the ET Slips Feet increments + MPH , i could do a more accurate prediction on MPH @ each incremental )

60= 1.457153 43.753919
330= 4.368187 79.474598
660= 6.862108 98.077220
1000= 9.039426 112.717880
1320= 10.900000 120.688077

60= 1.472064 43.381176
330= 4.407033 78.812857
660= 6.923479 97.181471
1000= 9.121505 111.648284
1320= 11.000000 119.531990

60= 1.478036 43.229760
330= 4.422842 78.547675
660= 6.948225 96.831249
1000= 9.154445 111.231671
1320= 11.040000 119.083272

60= 1.440000 42.656863
330= 4.422842 78.904208
660= 6.860000 97.603485
1000= 9.154445 108.947708
1320= 11.040000 121.258906

My data is wrong, this is the correct data, as to my memory

1.47 60
6.86 660
11.04 @ 118 maybe higher 118s
Denver

1.44 60
660?
10.90 @ 119 don't remember were in the 119s
Pueblo

[steve316]

very good post; two thumbs-up

[Stan Weiss]

by vortecpro » Tue Jan 12, 2021 8:30 pm

Larry

I've run 11.04 @ Denver with my peanut port in this Chevelle, here were the numbers I remember:
1.44
6.86
11.04 @ 118

Same setup @ Pueblo:
1.42
660 ?
10.90 @ 119

Code: Select all

some NHRA ET Slip info from my Database :

SS/KA 1.493 4.385 6.861  99.27 9.029 10.889 120.17
GT/QA 1.427 4.369 6.872  98.03 9.047 10.891 122.19
GT/QA 1.425 4.377 6.889  98.63 9.072 10.923 121.54
--------------------------------------------------
C/SA  1.478 4.414 6.929  97.05 9.129 11.001 120.14
D/SA  1.485 4.417 6.935  97.53 9.132 11.001 119.97

its possible to Run somewhere within these Ranges :
( if i had all the ET Slips Feet increments + MPH , i could do a more accurate prediction on MPH @ each incremental )

60= 1.457153 43.753919
330= 4.368187 79.474598
660= 6.862108 98.077220
1000= 9.039426 112.717880
1320= 10.900000 120.688077

60= 1.472064 43.381176
330= 4.407033 78.812857
660= 6.923479 97.181471
1000= 9.121505 111.648284
1320= 11.000000 119.531990

60= 1.478036 43.229760
330= 4.422842 78.547675
660= 6.948225 96.831249
1000= 9.154445 111.231671
1320= 11.040000 119.083272

60= 1.440000 42.656863
330= 4.422842 78.904208
660= 6.860000 97.603485
1000= 9.154445 108.947708
1320= 11.040000 121.258906

Larry,
I don't know what you are using for Cd and FA. The numbers I have for a '70 Chevelle are CD=.42 and FA=25.5

Stan

[maxracesoftware]

by Stan Weiss » Wed Jan 13, 2021 9:26 am
Larry,
I don't know what you are using for Cd and FA.
The numbers I have for a '70 Chevelle are CD=.42 and FA=25.5
Stan

Stan ,
i'm not using any Aerodynamic info for those ET/MPH posts ,
instead i'm just generating all the incrementals
based off VortecPro's ET he posted .

thanks for your : '70 Chevelle are CD=.42 and FA=25.5
i'll definetly use your info in my database .

my calculator is not for sale ,
i only use it for research + correlations ,
and i just use it to see if there would be any acceleration problems
or issues on a Run down the Dragstrip .

i like the QJet tricks in VortecPro's post here :
the Q-Jet on the right-side :
viewtopic.php?p=885216#p885216

it will be interesting which of the 2 Q-Jet's can be tuned to make the best
TQ and HP Curve .

[vortecpro]

Larry

Its great having your friend Harold building Q-Jets for me, I think he's really making some headway with these carbs. Below is the data from the same car/engine in Kearney Neb 2130 Elevation 3500 DA, I hesitated to post this because I had a flat spot in the carb on the launch/hesitation that was later fixed in Denver. Car 525