Highest HP From 243 Heads?

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Dec 8, 2024 | 10:05 PM

#201

wannafbody

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From: Pittsburgh

Quote:

Originally Posted by sxc Z28

DarthV8r pulled the cam out of his ls1 and sent it to Doug. It’s basically a Cam Motion Titan 4 in LLSR spec so something like 232/240 lift is .680” range iirc.

That isn't a huge cam. I was expecting more intake duration but the lift is quite high. I'm assuming some type of shaft rocker is being used.

Dec 9, 2024 | 06:09 AM

#202

sxc Z28

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From: Indiana

Quote:

Originally Posted by wannafbody

That isn't a huge cam. I was expecting more intake duration but the lift is quite high. I'm assuming some type of shaft rocker is being used.

It really is a mild cam and the higher lift is typical on LLSRs because you can get away with it. Quite different than your typical hydraulic.

Dec 9, 2024 | 09:52 AM

#203

G Atsma

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From: Central Cal.

Quote:

Originally Posted by 4visking

Stay ignorant my friend.

Ironic, coming from you....

Dec 9, 2024 | 11:14 AM

#204

4visking

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Quote:

Originally Posted by G Atsma

Ironic, coming from you....

Why are you still typing? You were told to 🤫

Dec 9, 2024 | 02:04 PM

#205

01CamaroSSTx

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From: Conroe, Texas

Quote:

Originally Posted by 4visking

You are also confused. Also MD is worthless for comparison sake.

Now you've struck my curiosity..Why would you say a Mustang Dyno is a worthless comparison?

Dec 9, 2024 | 03:28 PM

#206

4visking

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Quote:

Originally Posted by 01CamaroSSTx

Now you've struck my curiosity..Why would you say a Mustang Dyno is a worthless comparison?

MD has way too much user input to account for. Corrected Dynojet numbers are the standard when it comes to comparing numbers.

Last edited by 4visking; Dec 9, 2024 at 04:48 PM.

Dec 9, 2024 | 06:50 PM

#207

G Atsma

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From: Central Cal.

Quote:

Originally Posted by 4visking

Why are you still typing? You were told to 🤫

Who listens to the ignorant??

Dec 11, 2024 | 04:43 PM

#208

HioSSilver

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From: Winchester, VA

Quote:

Originally Posted by 4visking

What chassis dyno were they using to compare it to the engine dyno Doug? If it wasn’t SAE DJ numbers then your argument is invalid.

Watch the vid.....not that it matters. You'll have something else stupid to say.

Quote:

Originally Posted by wannafbody

I never did see the cam specs for revving to 7800 rpm. I know a lot of guys don't go over 7200 due to factory rod bolts.

IDK....the h/c set up we did to phils c6 ls3 got spun to 8200 on oe rod bolts. I did use a better rod bolt on these gen4 rods. But only because it was apart already.

Cam specs below

Quote:

Originally Posted by sxc Z28

DarthV8r pulled the cam out of his ls1 and sent it to Doug. It’s basically a Cam Motion Titan 4 in LLSR spec so something like 232/240 lift is .680” range iirc.

237/245 .654/.637 112.5+2.

DARTHV8R FTW!

Quote:

Originally Posted by 01CamaroSSTx

Now you've struck my curiosity..Why would you say a Mustang Dyno is a worthless comparison?

because he's worthless.

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Dec 11, 2024 | 05:34 PM

#209

01CamaroSSTx

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From: Conroe, Texas

...It's pulling through the entire rpm range and just kept climbing. Very nice power and torque curve for an LS1 and well done sir..

Dec 11, 2024 | 07:36 PM

#210

HioSSilver

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From: Winchester, VA

Thank you....not to bad for some hand me down parts ,
a set of old gmpp cnc 243s and pump gas.

Dec 11, 2024 | 07:50 PM

#211

sxc Z28

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From: Indiana

Quote:

Originally Posted by HioSSilver

237/245 .654/.637 112.5+2.

DARTHV8R FTW!

That’s right 232/240 after warmup. LLSR lyfe.

Jaik FTW fosho!

Dec 11, 2024 | 08:39 PM

#212

HioSSilver

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From: Winchester, VA

Yea that's what he told me after warm up. Crazy how much they grow and how it affects the cam size.

Dec 11, 2024 | 09:10 PM

#213

wannafbody

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Quote:

Originally Posted by sxc Z28

That’s right 232/240 after warmup. LLSR lyfe.

Jaik FTW fosho!

Are you saying at operating temp the cam gets smaller?

Dec 11, 2024 | 09:40 PM

#214

sxc Z28

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From: Indiana

Quote:

Originally Posted by wannafbody

Are you saying at operating temp the cam gets smaller?

No, the cam acts smaller when engine gets to operating temp. It’s the nature of setting valve lash with this style cam.

Dec 11, 2024 | 10:12 PM

#215

G Atsma

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From: Central Cal.

Quote:

Originally Posted by wannafbody

Are you saying at operating temp the cam gets smaller?

Aluminum blocks and heads grow more than steel pushrods. More lash when warm....

Feb 15, 2025 | 04:47 PM

#216

Zac_Speed

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From: Liberty, Mo.

I've got a cool 243 head combo wrapping up this summer.
6.2 with forged pistons and rods
Cartek 4x 243 heads with titanium intake valves and sodium exhaust.
24X/25X .650/.650 114
Ported MAMO Fast 102 - most likely will change.
14.1 compression on E

Feb 16, 2025 | 01:28 PM

#217

HioSSilver

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From: Winchester, VA

Hell yea.....should be nasty af. Post up your results when you get them!

I probably would shy away from the fast intake and use something for more rpm tho.

Feb 16, 2025 | 09:12 PM

#218

4visking

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Quote:

Originally Posted by Zac_Speed

What kind of power are you hoping for? 580-600?

Feb 17, 2025 | 06:50 PM

#219

wannafbody

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From: Pittsburgh

Quote:

Originally Posted by G Atsma

Aluminum blocks and heads grow more than steel pushrods. More lash when warm....

Are you talking when using a solid lifter? A hydraulic lifter should compensate for additional block growth shouldn't it?

Feb 17, 2025 | 10:29 PM

#220

G Atsma

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From: Central Cal.

Quote:

Originally Posted by wannafbody

Are you talking when using a solid lifter? A hydraulic lifter should compensate for additional block growth shouldn't it?

One would think so. The only variation in cam timing should be with a solid lifter. Not looking back now, but wasn't that the subject way above here?
Edit- I THINK a low lash solid setup was being discussed earlier here. Might be the reason I said what I did.

Last edited by G Atsma; Feb 17, 2025 at 10:35 PM.

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