2.56 Gear, Stock Converter, 4100 Pounds, NA 11s?

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67 Nova
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Re: 2.56 Gear, Stock Converter, 4100 Pounds, NA 11s?

Post by 67 Nova »

OK i see your thinking. I went through a talk like this with Nick Sacvo when he had the '65 Impala in fast streetcar stuff. My shop had been running NHRA Pro Stock and Nick was also running that style short stroke motor as he too was heavy and traction limited on a small tire.

10.70 Streetcar will be my slowest daily driver. My fast pump gas stuff will be mid to low 7's, but that on Nitrous. That will be a 8.50 cert'ed '69 Nova with a pump gas 632 on a 275 tire. Since it's only certified to go 8.550's that is the goal NA. My other driver is a '67 Nova with a all aluminum 515. That to is pump gas and dual plane intake. Trying to get that in the 8's, but even a 9.20 should be ok.
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Re: 2.56 Gear, Stock Converter, 4100 Pounds, NA 11s?

Post by Machtuck »

67 Nova, i think you saw DP as dual plane. I meant double pumper. The dual plane is a split plenum Performer RPM intake and is a good match for this engine.
Draggin- i bought this fuel line from Right Stuff. They are great to deal with. I believe it is a 1970 L78 Chevelle pump to carb setup.
I shot another video of the car idling and it still won’t upload to Speed Talk.
Dragginwagon406
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Re: 2.56 Gear, Stock Converter, 4100 Pounds, NA 11s?

Post by Dragginwagon406 »

Machtuck wrote: Tue Dec 21, 2021 10:27 am Draggin- i bought this fuel line from Right Stuff. They are great to deal with. I believe it is a 1970 L78 Chevelle pump to carb setup.
I shot another video of the car idling and it still won’t upload to Speed Talk.
OK, the fuel line is on my short list.

Videos should be hosted on YouTube, and link shared to SpeedTalk.
1.87, 11.72 @ 120, 4110 lbs, 2.56 gears, stock stall, 225/70-15 Cooper Cobras
My sleeper video - https://youtu.be/tcOh6gQ_K_E
Dragginwagon406
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Re: 2.56 Gear, Stock Converter, 4100 Pounds, NA 11s?

Post by Dragginwagon406 »

A video for you guys.

https://youtu.be/tcOh6gQ_K_E
1.87, 11.72 @ 120, 4110 lbs, 2.56 gears, stock stall, 225/70-15 Cooper Cobras
My sleeper video - https://youtu.be/tcOh6gQ_K_E
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Re: 2.56 Gear, Stock Converter, 4100 Pounds, NA 11s?

Post by maxracesoftware »

Dragginwagon406 wrote: Mon Jan 03, 2022 10:58 am A video for you guys.

https://youtu.be/tcOh6gQ_K_E
the only problem i mostly see with Dragy is : 0-30MPH , 0-60MPH, and 60Ft ET's
after those distances , Dragy is very close to reality !

i have my Software setup as 12.0" inches or 1 Foot of Rollout distance
and i think Dragy might be setup the same ???

Dragy's MPH and GForce : 103.0 MPH with 0.300 GForce
ETA calculates same thing :D

dragginwagon406_Nov05_2021_11.8435ET_119.27MPH_GForce.jpg
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Re: 2.56 Gear, Stock Converter, 4100 Pounds, NA 11s?

Post by In-Tech »

hehe, we were testing the 430 cu in Whippled triple disc CTSV the first time with the drag radials, OnStar called and wanted to know if we needed ambulance assistance due to the rear end collision we were just in :lol: The antenna was disconnected shortly thereafter :wink:
Heat is energy, energy is horsepower...but you gotta control the heat.
-Carl
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Re: 2.56 Gear, Stock Converter, 4100 Pounds, NA 11s?

Post by Dragginwagon406 »

Evidently, the YouTube world appreciates sleepers, 2.56 gears, stock torque converters, and 225/70-15 Cooper Cobras. 😂

47K views and counting 😂

https://youtu.be/tcOh6gQ_K_E

76C95CE0-21B4-47FF-8CA8-C8CB39E2AE2F.png
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1.87, 11.72 @ 120, 4110 lbs, 2.56 gears, stock stall, 225/70-15 Cooper Cobras
My sleeper video - https://youtu.be/tcOh6gQ_K_E
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Re: 2.56 Gear, Stock Converter, 4100 Pounds, NA 11s?

Post by malibuguy79 »

I literally just watched that video about an hour ago. Hop on here, check active threads and boom.

Freaking me out mannn
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Re: 2.56 Gear, Stock Converter, 4100 Pounds, NA 11s?

Post by F-BIRD'88 »

Back in the day I used to run a Private label name version of the Cooper Cobra tire P225/70-15. They used to bite pretty good especially about ½ worn down. Pressure was critical. Said "Challenger" on the sidewall but same same. The sidewall tirewear/heat rating is a indicator.
Used to run just one traction bar on the passenger side only. Low buck 454, nitrous Car was a piggy also.
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Re: 2.56 Gear, Stock Converter, 4100 Pounds, NA 11s?

Post by maxracesoftware »

maxracesoftware wrote: Tue Nov 23, 2021 2:56 pm
i had a 1970 or was it 1972 dark brown Monte Carlo back then ( bought it brand new , can't remember the Year though :) 1970 or 72 Model :lol:
getting too old :lol:
i have a old Pic of it somewhere in suitcases in a closet
your Monte Carlo brought back a few memories of my Monte Carlo ,
i went visit my 1st Cousin in Sauk Village , Illinois near Chicago ,
got a Speeding Ticket on the way thru Interstate near a small Town in Illinois ,
offered to pay the Officer on the spot , but he refused,
instead he made me follow him to that Town's CourtHouse .

Also went up the Sears Tower ... felt it swaying :)
just like they said it would .
Question :
what Year and what kind of Car is this ??? ( my Memory is shot on this ) :)
reason why : i had both a Olds Delta 88 and a MonteCarlo in and around 1970 to 1973 ?
both were same Color Combos ... all i remember was my Monte Carlo had wood grain instrument panel

i need some Experts to solve my questions :)

i took this pic of my old House with our Chevy Race Car Hauler Truck in 1973 (right-side) when it snowed
1973SnowRaceCarHauler.jpg
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Re: 2.56 Gear, Stock Converter, 4100 Pounds, NA 11s?

Post by Dragginwagon406 »

Successful first outing with the new VortecPro engine. Drove 190 miles to the track, noting about 13 mpg (what can I say, it's fun to accelerate). This was the first race using a tachometer in the Monte.

Highway speed with the 2.56 gears
MC Tach.jpeg




Arrived at the track
MC US131.jpeg




It comes out of the bottom very well. Traction off the line was definitely a little more complicated than with my 496.
20220513 MC Launch.jpg




The engine power is falling off around 1175-1200', which is keeping the mph down. My best guess is it's either hitting the rev limiter in the MSD Digital 6-Plus, running out of fuel or the power drops off quickly at 6300 rpm.
20220512 Time Slip.jpg




Being it was a FAST Race, car wore the Cooper Cobras for this race.
MC Tire.jpeg
MC Tire2.jpeg




Almost had a great race with this 571 CI beast.
MC Cyclone.jpeg




Anyhow, have a few items to square up with the car. Hopefully collect a 11.4 or 11.5 by the end of the season.
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1.87, 11.72 @ 120, 4110 lbs, 2.56 gears, stock stall, 225/70-15 Cooper Cobras
My sleeper video - https://youtu.be/tcOh6gQ_K_E
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Re: 2.56 Gear, Stock Converter, 4100 Pounds, NA 11s?

Post by steve cowan »

Dragginwagon406 wrote: Thu May 19, 2022 9:11 pm Successful first outing with the new VortecPro engine. Drove 190 miles to the track, noting about 13 mpg (what can I say, it's fun to accelerate). This was the first race using a tachometer in the Monte.

Highway speed with the 2.56 gears

MC Tach.jpeg





Arrived at the track

MC US131.jpeg





It comes out of the bottom very well. Traction off the line was definitely a little more complicated than with my 496.

20220513 MC Launch.jpg





The engine power is falling off around 1175-1200', which is keeping the mph down. My best guess is it's either hitting the rev limiter in the MSD Digital 6-Plus, running out of fuel or the power drops off quickly at 6300 rpm.

20220512 Time Slip.jpg





Being it was a FAST Race, car wore the Cooper Cobras for this race.

MC Tire.jpeg

MC Tire2.jpeg





Almost had a great race with this 571 CI beast.

MC Cyclone.jpeg





Anyhow, have a few items to square up with the car. Hopefully collect a 11.4 or 11.5 by the end of the season.
I think what you have done with your Monte is very clever.
A genuine mid/low 11 second streeter is a fast car on the street.
Best of both worlds,75 mph highway cruising, 120 mph on the track.
I watch some of that FAST series on the google machine, very impressive.
steve c
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Re: 2.56 Gear, Stock Converter, 4100 Pounds, NA 11s?

Post by Dragginwagon406 »

steve cowan wrote: Thu May 19, 2022 11:02 pm
Dragginwagon406 wrote: Thu May 19, 2022 9:11 pm Successful first outing with the new VortecPro engine. Drove 190 miles to the track, noting about 13 mpg (what can I say, it's fun to accelerate). This was the first race using a tachometer in the Monte.

Highway speed with the 2.56 gears

MC Tach.jpeg





Arrived at the track

MC US131.jpeg





It comes out of the bottom very well. Traction off the line was definitely a little more complicated than with my 496.

20220513 MC Launch.jpg





The engine power is falling off around 1175-1200', which is keeping the mph down. My best guess is it's either hitting the rev limiter in the MSD Digital 6-Plus, running out of fuel or the power drops off quickly at 6300 rpm.

20220512 Time Slip.jpg





Being it was a FAST Race, car wore the Cooper Cobras for this race.

MC Tire.jpeg

MC Tire2.jpeg





Almost had a great race with this 571 CI beast.

MC Cyclone.jpeg





Anyhow, have a few items to square up with the car. Hopefully collect a 11.4 or 11.5 by the end of the season.
I think what you have done with your Monte is very clever.
A genuine mid/low 11 second streeter is a fast car on the street.
Best of both worlds,75 mph highway cruising, 120 mph on the track.
I watch some of that FAST series on the google machine, very impressive.
Thank you, I think it’s quite great.

To be clear, my car is not FAST-legal; I have incorrect carb, intake, ignition, fuel pump, headers and electric fans. From the outside, the car appears quite original.
7532DEC1-985D-410C-8E30-79877618C146.jpeg



The best part is giving friends and family a ride for the first time, they never suspect a car with such a smooth idle could be like Dr. Jekyll and Mr. Hyde. And it can run low-12s on a completely unprepped street, on plain street tires, with a full tank, trunk, and with a passenger.
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1.87, 11.72 @ 120, 4110 lbs, 2.56 gears, stock stall, 225/70-15 Cooper Cobras
My sleeper video - https://youtu.be/tcOh6gQ_K_E
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Re: 2.56 Gear, Stock Converter, 4100 Pounds, NA 11s?

Post by vortecpro »

My math shows 35 observed HP gain with no tuning, then theres the 3000 feet DA difference, so basically you picked up a minimum of 50 observed HP based on 1/8 mile MPH. I really feel the 228 @ .050 cam is the cork on the 510 inch engine, I hope its fuel or ignition that is holding you up, at the very least a taller tire will deliver more MPH. Remember the 4.375 stroke was your idea......... :D I really wonder what the 238 cam would do at this point, a lot more HP, but drivability would suffer as compared to now. So far what we have learned: carrying power past peak is so very important...............

Calculations show your 11.84 in zero DA conditions with the 496, mean the 510 would run 11.44 @ 123 in zero DA conditions, hopefully tuning can bring the MPH up.
Racing a NA NHRA stocker should be mandatory before any posting.
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Re: 2.56 Gear, Stock Converter, 4100 Pounds, NA 11s?

Post by rgalajda »

!975 Monte Carlo S

454 .030 over, Icon 779 pistons, 1/16 Total Seal rings, 9.5:1 compression, .043" quench

346236 peanut port heads, 2.190 intake valve , 1.880 exhaust , pocket porting, runners and chambers cleaned up, 3 angle valve job with blending,

Custom flat tappet camshaft on Voodoo lobes, 273 : 227@.050" / 107 LSA -- .571 lift with 1.79 roller tip rocker

Carburetor: Holley 780 cfm 3310-1 , Date coded 1975 , restored myself with some modifications

Exhaust: 1 7/8 headers into 2.5 inch exhaust with balance pipe

Rear axle: original 2.73:1 , positraction installed
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