Discuss Im Swapping Heads. 1 ?

96impalaustin · 11-04-2009, 04:22 PM

im swapping heads off the other lt1 i had but i sold the block but kept the heads so im going to clean up the valves and seats up really good get all the carbon off them and replace head gaskets and buy comp cam lifters, comp push rods, idk what kind of springs becuase i dont want them to hard but not soft?, idk if this is a good list or not? im getting new MSD wires and maybe new plugs.

what springs should i get i need all the info please like dia. too?? everythings gonna be stock but maybe lifters and push rods

im swapping heads becuase ive got like 3 snapped exhaust manifold bolts in the heads thats why it leaks my other heads only got 1 snapped but im gonna try and get it out first

my most important ? is when i take the heads off and put the new ones on how do i tightin and make sure everythings good with the rocker arms?im not going to turn the motor over so is it just a sertain torq i torq them too or what??

KW Baraka · 11-04-2009, 04:33 PM

Quote:

Originally Posted by 96impalaustin

im swapping heads off the other lt1.....idk what kind of springs.......

Contact Lloyd Elliot. Let him know if these are iron heads off a Caprice/Impala/Roadmaster......or aluminum heads off a Camaro/TA/Vette.

See below.

http://www.ls1lt1.com/forum/showthread.php?t=32069

KW

2fast4u88 · 11-04-2009, 04:52 PM

If you are using a cam. I would go with lt4 springs. Use the stock retainers and locks.

You should be able to got with a set of 1.6 roller rockers if you wanted. Now if you plan on a cam down the road. Go with a set of behives.

96impalaustin · 11-04-2009, 05:56 PM

i ll cam it down the road but would beehives be to stiff ?

and should i just use the stock retainers and locks?

KW Baraka · 11-04-2009, 08:38 PM

One of the great things about the Beehive springs is that they have a very low spring rate considering their effectiveness......but to directly answer your question, no. The Beehives will not be too stiff.

Again......I'd contact Lloyd Elliot and get his recommendation. He sells springs in addition to his porting services, and he can provide you with the right product for your needs.

BTW......you can't use all the same springs on iron heads that you can use on the aluminum heads......and some springs (with the iron heads) will require a different install height then what they're spec'ed for.

So.......if you're installing another set of iron heads, call Lloyd!

KW

95Z · 11-04-2009, 10:36 PM

KW, can you refresh my mind on what max lift on the iron heads is and why their is a limit?

Might come in handy if he goes picking a cam in the future and I've been meaning to ask.

Enthusiast · 11-04-2009, 10:38 PM

Quote:

Originally Posted by 2fast4u88

If you are using a cam. I would go with lt4 springs. Use the stock retainers and locks.

You should be able to got with a set of 1.6 roller rockers if you wanted. Now if you plan on a cam down the road. Go with a set of behives.

If they are aluminum and your staying 1.5s the Lt4s would work and I know a few people running them.

But i have seen issues with people running them with the 1.6s.
The Lt4 valves are lighter than the LT1 valves so the LT4 springs have trouble keeping up with the heavier LT1 valves

But I still agree with KW, Llyod knows his springs. Hes always got a decently priced spring to reccomend that most people overlook.

KW Baraka · 11-05-2009, 03:06 PM

Quote:

Originally Posted by 95Z

KW, can you refresh my mind on what max lift on the iron heads is and why their is a limit......

Not exactly sure what the true max limit is since the serious B-body runners all convert to aluminum heads......but generally, the B-body community cautions against anything more than .550".

But any limit is tied to the fact that high spring pressures can be an enemy of pressed-in rocker studs.

KW

95Z · 11-05-2009, 03:10 PM

Quote:

Originally Posted by KW Baraka

Not exactly sure what the true max limit is since the serious B-body runners all convert to aluminum heads......but generally, the B-body community cautions against anything more than .550".

But any limit is tied to the fact that high spring pressures can be an enemy of pressed-in rocker studs.

KW

Got it, thanks.

2fast4u88 · 11-06-2009, 12:59 AM

Quote:

Originally Posted by Enthusiast

If they are aluminum and your staying 1.5s the Lt4s would work and I know a few people running them.

But i have seen issues with people running them with the 1.6s.
The Lt4 valves are lighter than the LT1 valves so the LT4 springs have trouble keeping up with the heavier LT1 valves

But I still agree with KW, Llyod knows his springs. Hes always got a decently priced spring to reccomend that most people overlook.

Didn't know that about the iron heads. I've always heard they are moreless the same cept flow numbers.

As for lt4 springs with 1.6 rockers. I've seen that come up on here a few times as to why i said it. Though they aren't the best either. I believe the ones loyd talks about from time to time. Is right around the same price. And you can reuse the stock locks and retainers. Atleast on f-body heads. First time i've really heard about the valve problem also. But i could see the problem.

JAKEJR · 11-07-2009, 04:18 AM

You'll need to check for the correct pushrod length using an adjustable pushrod checking tool.

Also, you'll need to adjust the lifter preload once the hew heads are installed and doing this requires turning over the engine to correctly make the adjustments. They're are several different ways of doing this; I posted a STICKY on the method I use and recommend.

Jake

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