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388” ls3 hits the rollers with a new Cam! *hp\L*

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Old 04-28-2018, 07:56 PM
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Originally Posted by Mavn
Would have never guessed that LLSR Would give you wood, Wouldn't see it as wood.
Something about rpm just makes things better. Can't help it
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Old 04-30-2018, 11:10 AM
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What were the specs on the old cam, for the sake of comparison?

Thanks!
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Old 05-01-2018, 07:39 AM
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Originally Posted by gnx7
For a 388 setup that is absurd power! Nice job!

Big cam too for those cubes! My 441 cam is 252/260 and .714" Cammotion LLSR also... but its a road race cam. Maybe it'll run one day...


What heads/intake? Compression?

Are you running exotic headers that are stepped? What size primary and collectors? That's crazy power!
Out of the box mast ls3 255 heads, fast mid runner with the snout opened up to 107 mm, 11.9-12:1 compression. 2” TSP headers with SE 3” x pipe duals

Lots and lots of little things. Lots.
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Old 05-01-2018, 07:42 AM
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Originally Posted by NSFW
What were the specs on the old cam, for the sake of comparison?

Thanks!
Here’s the old one
Attached Thumbnails -e540c9e5-72a9-4389-ba44-20d56898ed4a.png  
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Old 05-01-2018, 07:43 AM
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Looks like a low Holley sniper could be worth about 20 more flywheel hp over the fast but make 10 less peak tq. Hmmm
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Old 05-01-2018, 08:00 AM
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I like your build... been thinking about it but I have questions.
Why go with the 255 LS3 head and not the 280-285 LS3 Mast head?

Why even bother with a LS3 head if you have the bore to run a LS7 head from Mast?
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Old 05-01-2018, 08:17 AM
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Originally Posted by Tuskyz28
I like your build... been thinking about it but I have questions.
Why go with the 255 LS3 head and not the 280-285 LS3 Mast head?

Why even bother with a LS3 head if you have the bore to run a LS7 head from Mast?
He may have his own reasoning but I would guess because it's still a relatively small motor, and 255 is plenty of head for a 388.

The larger square port heads really want over 400 cubes to take advantage of them.
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Old 05-01-2018, 08:53 AM
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Originally Posted by Puck
He may have his own reasoning but I would guess because it's still a relatively small motor, and 255 is plenty of head for a 388.

The larger square port heads really want over 400 cubes to take advantage of them.
this is not your typical 4.000 inch stroke build. This is a short stroke/BIG BORE engine. It's more than one way to come up with 388 cubes.
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Old 05-01-2018, 08:56 AM
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Originally Posted by Tuskyz28
I like your build... been thinking about it but I have questions.
Why go with the 255 LS3 head and not the 280-285 LS3 Mast head?

Why even bother with a LS3 head if you have the bore to run a LS7 head from Mast?
Because the project started as an SBE ls3 but then my short block was no good.

280’s are too big for a 388

The ls3’s seem to be working fine though
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Old 05-01-2018, 10:06 AM
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Ls3 is very tempting over ls7 top end due to the broader intake options too. There is no fast midlength for ls7 for example.
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Old 05-01-2018, 12:20 PM
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Originally Posted by Darth_V8r
Ls3 is very tempting over ls7 top end due to the broader intake options too. There is no fast midlength for ls7 for example.
^^^^^^^^^^Ding!Ding!Ding!!^^^^^^^^^^
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Old 05-01-2018, 12:32 PM
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Originally Posted by big hammer
Because the project started as an SBE ls3 but then my short block was no good.

280’s are too big for a 388

The ls3’s seem to be working fine though
Understandable about the shortblock.

What's your opinion on the 265 LS7 Mast heads that's intended for 4.000 bore motors ?
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Old 05-01-2018, 12:56 PM
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Originally Posted by Tuskyz28
Understandable about the shortblock.

What's your opinion on the 265 LS7 Mast heads that's intended for 4.000 bore motors ?
I’d think they’d be a dandy head on a 408/416 that’s pushing 7000+ rpm
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Old 06-23-2018, 12:37 PM
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Hammer which rockers are you using?
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Old 06-23-2018, 09:40 PM
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Originally Posted by AINT SKEERED
Hammer which rockers are you using?
t&d adjustables
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Old 06-23-2018, 10:13 PM
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Originally Posted by big hammer


t&d adjustables
ok thanks. Which lifter did you go with?
I'm looking at these , see if they are sufficient.
http://www.ws6project.com/user_stor/...oducts_id=8446
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Old 06-24-2018, 11:26 AM
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Originally Posted by AINT SKEERED
ok thanks. Which lifter did you go with?
I'm looking at these , see if they are sufficient.
http://www.ws6project.com/user_stor/...oducts_id=8446
i don’t remember the brand lol... sad hey? They’re a linked solid. No trays
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Old 06-24-2018, 12:17 PM
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That's what the morals are. Look like decent quality and I don't plan to go over the 7500 rpm limit they recommend.
then again i spin to 7400 on LS7 lifters��
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Old 06-24-2018, 08:40 PM
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Link bars are badass, I never understood why guys spend over 3 grand on a set of heads then spend a 100 dollars on lifters but whatever. I personally think lifters can make or break a motor reliability but that's me thinking that.
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Old 06-25-2018, 08:27 AM
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So the morel 5452 link bar lifters will be fine with a .700 or less lift and 7500 or less shift point?
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