Pump gas 421 SBC HP

General engine tech -- Drag Racing to Circle Track

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swampbuggy
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Re: Pump gas 421 SBC HP

Post by swampbuggy »

How about it Mt-Engines, give us the low down on this deal. Mark H. :-k
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Re: Pump gas 421 SBC HP

Post by Fatman »

Could we get some clarification on this cam?

Is it a hydraulic flat tappet with 270/275 advertised duration and .460" valve lift?
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Re: Pump gas 421 SBC HP

Post by mt-engines »

Calm down guys.. lol I don't live on here, I have a few more engines to finish up. I will port more details. Head flow, port sizing etc.
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Re: Pump gas 421 SBC HP

Post by swampbuggy »

What i wanna know is the details about the caliper Mr MT is holding in his picture on the right side of his post's. L.O.L. Mark H. :lol:
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Re: Pump gas 421 SBC HP

Post by Fatman »

mt-engines wrote: Mon Jun 07, 2021 12:13 pm Calm down guys.. lol I don't live on here, I have a few more engines to finish up. I will port more details. Head flow, port sizing etc.
Anymore info MT?
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Re: Pump gas 421 SBC HP

Post by mt-engines »

Sorry forgot. Had a few more engines this week at the dyno. Id like you guys to critique this engine to another I knew would make way more power. The other is a 406 SBC with oooold dart race series 220 heads.. I'll post a few links..

406. https://youtu.be/kDDjFmNheyQ
421. https://youtu.be/BPxLBBNGDbg
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Re: Pump gas 421 SBC HP

Post by mt-engines »

The AFR heads flow 304 if I remember and the darts flow 310
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Re: Pump gas 421 SBC HP

Post by Dennis »

Fatman wrote: Mon Jun 07, 2021 10:17 am Could we get some clarification on this cam?

Is it a hydraulic flat tappet with 270/275 advertised duration and .460" valve lift?
What's even more interesting is if .460 valve lift is advertised on cam card, which rocker ratio is on the cam card and which one was actually used in the engine?
European Performance Engines & Cylinder Heads
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Re: Pump gas 421 SBC HP

Post by 77cruiser »

Not much to go on is it? :)
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Re: Pump gas 421 SBC HP

Post by mt-engines »

Rocker ratio 1.6I 1.5E Jesel shafts
Goal was 600hp.

AFR 190 heads 2.080 11/32 stainless valves
.100 69
.200 152
.300 215
.400 256
.500 276
.600 293
.700 299
.800 304

Nothing fancy. Just bowl blend and short turn work a little work at the pinch. Camshaft was a Ruben Racing Cams solid tappet.

Shelf DSS pistons 1/16 1/16 3/16
TOTAL SEAL file fit standard tension rings
Gapped .018"top .016"2nd
SCAT Pro series 6.000 I beam 7/16 bolts
CALLIES 3.875 stroke crank
MELLING M55
MOROSO oil pan trap door no kickout
GM 184 bowtie block

More power could be had with a bigger head or a lot more work. But I don't work for free...
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Re: Pump gas 421 SBC HP

Post by rfoll »

It looks like the heads would be flowing over 260 at the .460 lift, but is the .460 with the 1.5 or 1.6 rocker?
So much to do, so little time...
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Re: Pump gas 421 SBC HP

Post by cjperformance »

mt-engines wrote: Wed Jun 16, 2021 6:48 pm Rocker ratio 1.6I 1.5E Jesel shafts
Goal was 600hp.

AFR 190 heads 2.080 11/32 stainless valves
.100 69
.200 152
.300 215
.400 256
.500 276
.600 293
.700 299
.800 304

Nothing fancy. Just bowl blend and short turn work a little work at the pinch. Camshaft was a Ruben Racing Cams solid tappet.

Shelf DSS pistons 1/16 1/16 3/16
TOTAL SEAL file fit standard tension rings
Gapped .018"top .016"2nd
SCAT Pro series 6.000 I beam 7/16 bolts
CALLIES 3.875 stroke crank
MELLING M55
MOROSO oil pan trap door no kickout
GM 184 bowtie block

More power could be had with a bigger head or a lot more work. But I don't work for free...
What is the part number on that camshaft?
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Re: Pump gas 421 SBC HP

Post by mt-engines »

cjperformance wrote: Mon Jun 28, 2021 8:16 am
mt-engines wrote: Wed Jun 16, 2021 6:48 pm Rocker ratio 1.6I 1.5E Jesel shafts
Goal was 600hp.

AFR 190 heads 2.080 11/32 stainless valves
.100 69
.200 152
.300 215
.400 256
.500 276
.600 293
.700 299
.800 304

Nothing fancy. Just bowl blend and short turn work a little work at the pinch. Camshaft was a Ruben Racing Cams solid tappet.

Shelf DSS pistons 1/16 1/16 3/16
TOTAL SEAL file fit standard tension rings
Gapped .018"top .016"2nd
SCAT Pro series 6.000 I beam 7/16 bolts
CALLIES 3.875 stroke crank
MELLING M55
MOROSO oil pan trap door no kickout
GM 184 bowtie block

More power could be had with a bigger head or a lot more work. But I don't work for free...
What is the part number on that camshaft?
CG264-4x7-110+4
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Re: Pump gas 421 SBC HP

Post by cjperformance »

mt-engines wrote: Mon Jun 28, 2021 8:11 pm
cjperformance wrote: Mon Jun 28, 2021 8:16 am
mt-engines wrote: Wed Jun 16, 2021 6:48 pm Rocker ratio 1.6I 1.5E Jesel shafts
Goal was 600hp.

AFR 190 heads 2.080 11/32 stainless valves
.100 69
.200 152
.300 215
.400 256
.500 276
.600 293
.700 299
.800 304

Nothing fancy. Just bowl blend and short turn work a little work at the pinch. Camshaft was a Ruben Racing Cams solid tappet.

Shelf DSS pistons 1/16 1/16 3/16
TOTAL SEAL file fit standard tension rings
Gapped .018"top .016"2nd
SCAT Pro series 6.000 I beam 7/16 bolts
CALLIES 3.875 stroke crank
MELLING M55
MOROSO oil pan trap door no kickout
GM 184 bowtie block

More power could be had with a bigger head or a lot more work. But I don't work for free...
What is the part number on that camshaft?
CG264-4x7-110+4
Im interested to see the full spec on that cam, a quick google showed nothing. Do you have a pic of cam card or a link. Thanks
Craig.
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