Highest HP From 243 Heads?

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Mar 27, 2018 | 10:18 AM

#21

gagliano7

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From: Monroe,NY

Quote:

Originally Posted by tug686spd

Still one of my favorites. https://m.youtube.com/watch?v=4tzm2pk9-nY

I seen that car run at Englishtown badass. The only thing is that car was stripped down only a drivers seat inside.

Mar 27, 2018 | 10:33 AM

#22

AnotherWs6

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Quote:

Originally Posted by gagliano7

I seen that car run at Englishtown badass. The only thing is that car was stripped down only a drivers seat inside.

I was going to mention this. It's badass, but I'm sure it's been put on a diet. Still evil.

Mar 27, 2018 | 10:39 AM

#23

kinglt-1

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From: Ft. Wayne, IN

I have seen 550whp with a 416 stroker and right around 500whp with a high strung 346. I agree with others that dyno numbers don't mean much without a baseline.

Mar 27, 2018 | 04:04 PM

#24

HioSSilver

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A friend made like 630 crank on a engine dyno with a 346 and stock 243s. They can make good power. It's a hydraulic cammed dirt car engine.

Mar 6, 2019 | 11:41 PM

#25

HioSSilver

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Well.....a year later bump and hopefully well find out before to long what my mild 346 243 headed build is gonna do.

Mar 17, 2019 | 12:36 AM

#26

Smokey B

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This head has some area.

https://www.corvetteforum.com/forums...g-results.html

Mar 17, 2019 | 07:29 AM

#27

HioSSilver

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I can't say I'm impressed with those results.

Mar 22, 2019 | 02:55 PM

#28

Mavn

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From: Houston

Quote:

Originally Posted by Smokey B

This head has some area.

https://www.corvetteforum.com/forums...g-results.html

Horrible numbers lol I made 507 wheel only 416 with Stock 243's...

Mar 23, 2019 | 09:08 AM

#29

KCS

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From: Conroe, TX

That was 510whp on 7 cylinders. Should have been about 583whp if all 8 were firing.

Mar 23, 2019 | 10:24 AM

#30

HioSSilver

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I'm hoping to get near 550whp with a 346 and messaged gmpp 243s. Hopefully my results will come sooner rather than later....but we all know how that goes down.

Mar 23, 2019 | 12:23 PM

#31

Mavn

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From: Houston

Wonder what it traps tho lol

Mar 23, 2019 | 12:58 PM

#32

HioSSilver

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We'll find out at some point. I'll be looking for 135+.

Mar 24, 2019 | 04:20 AM

#33

stilealive

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Morgan Motorsports made over 500 RWHP back in 2000. Their Aggressor 500 Head/Cam kit. Stock cubes.

Jun 14, 2019 | 08:51 AM

#34

LaBLKv6Z

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From: Lafayette, Louisiana

I'm running PRC LS6 2.5 heads on my LS3 427. M6 Car weighs 3490 with me. With my current cam (239/252 .620/.596 111 lsa) it has trapped 127 in the quarter.

Jun 14, 2019 | 08:56 AM

#35

HioSSilver

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That's not that good.

Jun 14, 2019 | 09:04 AM

#36

G Atsma

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I agree. A 427 with 243's, no matter how good they are, is being choked. Bigger heads and smaller cam would help it.

Jun 14, 2019 | 09:09 AM

#37

Tuskyz28

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Quote:

Originally Posted by G Atsma

I agree. A 427 with 243's, no matter how good they are, is being choked. Bigger heads and smaller cam would help it.

I Disagree. G~ Ive seen a 408ci motor with some serious ported 243 heads make over 500 rwhp threw a automatic and the car ran 9.9s in the quarter. Fourth gen camaro.

Jun 14, 2019 | 09:10 AM

#38

Tuskyz28

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Quote:

Originally Posted by HioSSilver

That's not that good.

Depending on the weight.....

Jun 14, 2019 | 09:14 AM

#39

G Atsma

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From: Central Cal.

Quote:

Originally Posted by Tuskyz28

I Disagree. G~ Ive seen a 408ci motor with some serious ported 243 heads make over 500 rwhp threw a automatic and the car ran 9.9s in the quarter. Fourth gen camaro.

That's cool! Those ports had to be paper thin and getting some SERIOUS velocity! AKA SMOOOOTH ports!
But now, this is on a 408, where the poster above is on a 427. Would 19 cubic inches make that big a difference?

Jun 14, 2019 | 09:16 AM

#40

Tuskyz28

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From: Mississippi

Quote:

Originally Posted by G Atsma

Depending on the head porter/cnc job you can run a bigger valve in the head. I 19 cubes larger is great but it would still perform if the head have a MEAN cnc job done to them.

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