JF74chevelle

New member here. I have a 6.2 L92 short block that has no heads, cam or Intake. I want a nice running motor for my Chevelle and I’m not to sure where to go with it. I was thinking of going with 862 5.3 heads, putting valve springs on it to match the summit 8707 cam (226/238 .600/.600 lift 113LSA). Stock Truck intake. It’ll be bolted to a manual trans with 3.73 gears. How does this sound to you guys? Decent build?

JakeFusion

iTrader: (7)

Should be fine. Will make good power as well and drive nice. If you can get a stock LS3 intake, that would work well too.

01CamaroSSTx

iTrader: (3)

Do that and your needing LS3/L92 cylinder heads though!

01CamaroSSTx

iTrader: (3)

I'm thinking 862's are way to small for that bore. I would be looking for some 243's if it where me and I wanted to keep the truck intake.

JF74chevelle

I’ve thought about that but around here I can get the 5.3 heads for so dirt cheap I thought I’d try them out. Maybe I’ll drive it for awhile then upgrade to some trick flows or something, maybe even going to rectangular port. I’d just like to build a cheap fun motor.

01CamaroSSTx

iTrader: (3)

The 6.2 is a 4.065 bore and would really benefit from the LS3/L92 heads. The 862's went on the 4.8's and 5.3's which only had a 3.780 bore and that's hurting your horsepower no doubt if you run them.

JF74chevelle

what cam would you guys recommend with the LS3 heads? This car is going to be a DD so I’m looking for great drivability but good power.

bortous

omI would do a 224/232 115 LSA +3.
-2 degrees overlap and will be strong everywhere and drive great with no bucking.

JakeFusion

iTrader: (7)

Sorry, I read those as 823 heads. I thought you had the LS3s. I would recommend the L92/LS3 heads. That cam would be fine with them.

5.3L heads would not be great on that motor... lots of compression. If ported, they could work. But you have the bore, so I'd use it.

JF74chevelle

do you have a link to where I could find that cam?

bortous

The link leads to my mind.
It's a custom specification.
I would recommend you get cam motion to make it for you.

JF74chevelle

lol, thank you.

KW Baraka

iTrader: (7)

You'd be MORE than fine if you went with that 226*/238* cam. It's a tiny bit 'milder' than the cam I run in my Impala.

With LS3 heads/intake, long-tubes headers and a 2 1/2" exhaust....a very tamed and easily drivable 460hp/425tq (conservative SWAG) to the wheels would be on tap. Mill the heads to yield about 11.3:1 compression with a .040" head gasket and you'd be real close to 500hp to the wheels.

KW

JakeFusion

iTrader: (7)

There's absolutely nothing wrong with that 226/238 cam in a 6.2L. It'd drive fine and make good power.

G Atsma

OP, looks like you have a plan to execute....

62nalide

iTrader: (2)

821/823s for sure on what you are after, for a cam I'd recommend reaching out to Cam motion which they should have some self cams for rectangle port heads from mild to wild.
Should be a fun toy.

JF74chevelle

Okay guys. I really appreciate all the advice. Exactly why I asked this question. I’ll definitely be sticking around this forum, lots of knowledge here! Thank you.

JF74chevelle

Would I be able to use LSA heads? Aren’t they almost the same as the L92/LS3 head?

G Atsma

They'll work, but are not an upgrade from the LS3 heads; if they are like LS9 heads, they actually flow a bit less due to small "wing" airflow vanes in the ports that help supercharged air flow. Other than that they are identical.

gnx7

iTrader: (28)

The LSA heads also have a stupid heavy intake valve in them and the swirl casting in the port is there I believe for MPG/efficiency and not flow..... I would get L92 heads and put in a lighter weight intake valve.... or just sack up and buy some LS3 heads that already have the lighter valve. Gotta love a factory head that flows 330cfm

https://www.lsenginediy.com/ultimate...r-heads-guide/