need2speed94

Anyone out there with HEMI heads on there LS powerplant? I'm curious to see if they are even worth swapping. I know it's probably impractical/expensive to switch to HEMI heads, as you'd have to pickup a ton of parts that were previously only compatible with wedge heads... but, cost aside, are they worth it???

Also... I'm not sure how HEMI heads would fit on an LS1 in an F Body, it's pretty tight in the engine bay to begin with?

-Marcus

jsteele90

iTrader: (13)

Wtf??????

need2speed94

Your not a fan of HEMI's I take it hah?

jsteele90

iTrader: (13)

Just not worth the effort when there are plenty of awesome heads available for the ls. But hey im sure someone eventually will waste the time and money on the r&d

need2speed94

Yea that's what I mentioned... There are so many people out there making serious power with just some CNC'd 241s or 243s, an LS6 intake and a good size cam. But I'm somewhat interested in HEMI heads because thinking about it, average HEMI designed heads should drop the compression wouldn't it (probably lower than 317 heads)? And I want to pickup a turbo sooner or later and having HEMI heads and some low compression pistons... you could run a LOT of boost on pump gas (assuming you have better internals) since the compression would be so low. Again, it does go back to the cost/effort, which is why I wanted to see if anyone would vouch for their performance.

6898camaross

Ive seen them on sbc's but not a ls

6898camaross

Bam!

https://ls1tech.com/forums/generatio...sema-show.html

need2speed94

Doesn't surprise me, you can find anything for a sbc hah.

need2speed94

Jesus... as I stated, I have NO idea how that'll fit in an F Body lol. GM really didn't make it convenient for people to work on the LS1. Hell, it takes a 1/4 of the time to change plugs on an LS1 in an RX7 than it does on an LS1 F Body (big fail GM!). On top of the HEMI heads not fitting, that blower doesn't look like it'll fit either! Back on topic... I'm guessing those heads were never mass produced? Otherwise I'm sure I wouldn't have even started this thread if they were... HEMI LS1? That's a nice blend of a classic design with modern technology that has a bunch of potential. Maybe one day a company will perfect some HEMI heads for the LS... hopefully before GM finally drops the pushrod LS series motors

RezinTexas

man that looks ridiculous...

That double staged rocker setup is just asking for trouble. Actual hemi heads don't have that. They have shaft mounted rockers with offset lifter bores. Plus a real hemi head has 2 spark plugs per cylinder.

Here is a link to show what they are capable of!!
http://board.moparts.org/ubbthreads/...c=&Search=true

But its still cool just cause its so crazy!

malibutwins

iTrader: (1)

You want a hemi go buy a mopar! We dont need no stinking hemi! Lol

wildcamaro

iTrader: (15)

Yea **** on hemi heads...a new modern fuel injected 426 crate motor only makes 590 hp...that's with a pretty hot cam...if you put a hot cam in an ls7 you are looking at 600+ hp easy...

It's funny you brought it up but I have seen LS series hemi heads...it would be trick but prob have to have a sheetmetal intake I imagine...

RezinTexas

really? a cam alone in an LS7 can get you 100hp?

KCS

iTrader: (20)

Seriously? You're using crate motors to make an argument?

need2speed94

Although I own an F Body I actually love Mopar's... NOT new Mopar, that's just a goddamn disgrace to domestics. Old Mopar has always been my interest. And as for a HEMI, it's just a head design, so why not put them on an LS? I'm crazy about forced induction, so HEMI heads would really help with opening up the boost potential on an LS. I could go with some 317s on an LS1 and call it a day, but imagine how much boost you could run with the bigger combustion chambers of HEMI designed heads?

lemkerailroad

i love the look of the hemi heads and all

.........when i read this this morning..............


but i am still going to check these out as i may be one of the few that may make the purchase of the kit, being that i have the funding and all..........and see what this combo is really going to due

will start a new thread when i get my new parts

need2speed94

If I hear good things about them, I'll pick them up sooner or later as well! I'd greatly appreciate a thread on how they are. You plan on using them for a boosted application?

bww3588

iTrader: (49)

I see they are capable of just about as much as an LS3 head...which reinforces my argument that a HEMI is nothing more than a bandwagon name plate.

lemons12

iTrader: (71)

Ls7 heads outperform the HEMI heads.

At 10,000$ for a set of heads, I'll pass.

bww3588

iTrader: (49)

no, a cam in an LS7 will give you 50 hp.

LS7 stock is 550hp.