Vortec CT350 crate in a street car.

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Monza355
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Re: Vortec CT350 crate in a street car.

Post by Monza355 »

vortecpro wrote: Mon Jan 10, 2022 8:03 pm 123 MPH @ 3200 pounds = observed 459 HP crankshaft HP.

1320 / 123 = 10.73 sec. Very impressive results as always Mark ! May i ask what transmission / converter combo you run in this car ?
rfoll
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Re: Vortec CT350 crate in a street car.

Post by rfoll »

1980RS wrote: Mon Jan 10, 2022 3:54 pm
rfoll wrote: Sun Jan 09, 2022 8:00 pm
vortecpro wrote: Sun Jul 11, 2021 12:01 pm For what its worth my sons G/crate 330 HP Vortec 350 runs 10.6s @ 123 @ 3200 pounds, no porting on the heads, .417 lift @ the valve.
I'm trying to understand how this is possible. I have a 3500 lb, (with me in it), 78 X body. The engine is a 415 solid roller with a Holley 300-25, 800 dp, Track 1 heads, and 5100 converter. My best pass is 10.88 @ 122, 1.5 60'. It is much easier to believe 11.6 except for the 123 mph you posted..
My 406 with Vortec 062's ran in the high tens and that engine had a mild flat tappet hyd cam and stock rockers with little cheapy headers so I can see where Mark could get one to run that quick with a big stick in the engine with "stock" heads.
I would like to hear more about your car. The times you posted are impressive also. Although my parts aren't junk by any means, there are things that might be holding it back. I have to run mufflers albeit through a full length 3" system. My static compression is only 10.3. Brodix sent me heads with 70 plus cc chambers and I can't bring myself to pull the engine and mill everything. Pump gas is cheap, but this isn't much of a daily driver anymore.
So much to do, so little time...
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Re: Vortec CT350 crate in a street car.

Post by F-BIRD'88 »

"There's nothing stock about a Stock Car"
1980RS
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Re: Vortec CT350 crate in a street car.

Post by 1980RS »

rfoll wrote: Tue Jan 11, 2022 10:36 am
1980RS wrote: Mon Jan 10, 2022 3:54 pm
rfoll wrote: Sun Jan 09, 2022 8:00 pm

I'm trying to understand how this is possible. I have a 3500 lb, (with me in it), 78 X body. The engine is a 415 solid roller with a Holley 300-25, 800 dp, Track 1 heads, and 5100 converter. My best pass is 10.88 @ 122, 1.5 60'. It is much easier to believe 11.6 except for the 123 mph you posted..
My 406 with Vortec 062's ran in the high tens and that engine had a mild flat tappet hyd cam and stock rockers with little cheapy headers so I can see where Mark could get one to run that quick with a big stick in the engine with "stock" heads.
I would like to hear more about your car. The times you posted are impressive also. Although my parts aren't junk by any means, there are things that might be holding it back. I have to run mufflers albeit through a full length 3" system. My static compression is only 10.3. Brodix sent me heads with 70 plus cc chambers and I can't bring myself to pull the engine and mill everything. Pump gas is cheap, but this isn't much of a daily driver anymore.
What would you like to know about the car?
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Re: Vortec CT350 crate in a street car.

Post by rfoll »

What kind of car? Weight, transmission, gear, tire diameter etc. Are you running open exhaust? Quick details about the engine combo. I have mildly massaged Vortec heads on all of my street cars. My 71 C20 has a 400 with those heads. Although impressive for what it is, regular Vortecs are really small for 400 cubes. Actually, I think my Brodix heads are too small for my 415 and the rpm I'm turning.
So much to do, so little time...
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Re: Vortec CT350 crate in a street car.

Post by vortecpro »

Monza355 wrote: Tue Jan 11, 2022 4:54 am
vortecpro wrote: Mon Jan 10, 2022 8:03 pm 123 MPH @ 3200 pounds = observed 459 HP crankshaft HP.

1320 / 123 = 10.73 sec. Very impressive results as always Mark ! May i ask what transmission / converter combo you run in this car ?

Your paying attention! I like your math!

3200 pounds, Metric 200 trans, 2,75 first gear, 4.88 rear gear in a 9 inch, and that wasn't my choice either. Converter is a Munsinger. Theres more in it, just give my 17 year old son some time, "we moved our shop to Texas" he's got Vortec 350 cores lined up like a train LOL.
Racing a NA NHRA stocker should be mandatory before any posting.
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