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

General engine tech -- Drag Racing to Circle Track

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

Post by vortecpro »

Take a 1970 Monte Carlo on street radial tires, bone stock survivor with a 2.56 gear, Turbo 350 with the factory stock GM TQ converter, add a 496 with 9.8 compression with a 228 @ .050 hyd roller and GM 049 heads-will it run 11s?
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1980RS
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Re: 2.56 Gear, Stock Converter, 4100 Pounds, NA 11s?

Post by 1980RS »

Yup it will. Mark you need some of those 2.56's and run some killer speeds with that peanut port engine. :lol:
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Re: 2.56 Gear, Stock Converter, 4100 Pounds, NA 11s?

Post by Geoff2 »

Rocket booster might be reqd...
BradH
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Re: 2.56 Gear, Stock Converter, 4100 Pounds, NA 11s?

Post by BradH »

Unless there's a lot more going on under the hood than your description implies, no.
vortecpro
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Re: 2.56 Gear, Stock Converter, 4100 Pounds, NA 11s?

Post by vortecpro »

A picture of whats going on.........I've always opted for Turbo 350/400 trans with a 2 series gear over an OD trans. The nice thing about this combo is perfect street ability, you could pull a travel trailer to the track if you wanted too.

Bore .060
4.250 stroke
6.385 rod
Mahle power pack pistons 18 cc dome
Isky 228/238 hyd roller
Performer RPM intake
780 Vac sec carb
Vortecpro oil pan
Ported 049 heads, 1.880/2.190 valves
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Chris_Hamilton
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Re: 2.56 Gear, Stock Converter, 4100 Pounds, NA 11s?

Post by Chris_Hamilton »

My guess is that because you are asking the question, you know what the answer is going to be. :D
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Re: 2.56 Gear, Stock Converter, 4100 Pounds, NA 11s?

Post by lefty o »

as it sits, nope.
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Re: 2.56 Gear, Stock Converter, 4100 Pounds, NA 11s?

Post by BradH »

Chris_Hamilton wrote: Mon Nov 22, 2021 9:44 am My guess is that because you are asking the question, you know what the answer is going to be. :D
I've heard it said a good trial lawyer never asks a question in court for which he/she doesn't already know the answer. :lol:

If it can, it won't 60-ft for sh!t and will have to have a big-a$$ top-end charge to make up for it. I'm trying to think in terms of dialing back my own ET & MPH from old builds and the first one that comes to mind is 11.7 at 118 w/ a 1.70 60... slug the 60-ft and put another 3 MPH on there and maybe there's an 11.9-something hiding in it.

But the as-described combo w/ standard radial tires is going to be hurting for enough traction to even do that. Oh, no altitude-corrected ETs, either...
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Re: 2.56 Gear, Stock Converter, 4100 Pounds, NA 11s?

Post by vortecpro »

I can only speak for myself, I've never that I can remember altitude corrected ETs, its 66 degrees where I live and 276 DA right now. The owner of the Monte lives in Ohio. I think it 60 foots 1.88 on the street radials, runs through in 2nd gear.
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Re: 2.56 Gear, Stock Converter, 4100 Pounds, NA 11s?

Post by BradH »

You're no longer up near Mt. Olympus? :lol:

What sort of MPH is the Monte Carlo running, along w/ the 1.88 60?
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Re: 2.56 Gear, Stock Converter, 4100 Pounds, NA 11s?

Post by Rick! »

Chris_Hamilton wrote: Mon Nov 22, 2021 9:44 am My guess is that because you are asking the question, you know what the answer is going to be. :D
I almost submitted a reply and then erased it as I figgered this was one of those "fishing" questions.
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Re: 2.56 Gear, Stock Converter, 4100 Pounds, NA 11s?

Post by strokersix »

BradH wrote: Mon Nov 22, 2021 10:40 am
I've heard it said a good trial lawyer never asks a question in court for which he/she doesn't already know the answer. :lol:
Corollary: A good design engineer already knows the answer before submitting the test request.
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Re: 2.56 Gear, Stock Converter, 4100 Pounds, NA 11s?

Post by skinny z »

I somehow suspect this isn't going to be as difficult as it seems.
Once I read ported heads....

Wallace says:

Screenshot_20211122-112042.png

I'll go out on a limb and say 470 HP is a walk in the park. (Even if it is an average across the rev range...)
More than one of my racing friends have 11 second cars.
12 seconds in the first eighth.
10 seconds in the other eighth.
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Re: 2.56 Gear, Stock Converter, 4100 Pounds, NA 11s?

Post by vortecpro »

The owners 496 made 580 HP and 600 TQ, ran 11.84 @ 119.46.
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Re: 2.56 Gear, Stock Converter, 4100 Pounds, NA 11s?

Post by strokersix »

Does the 2.56 gear have limited slip? Seems like it must be to run that quick.
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