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Jul 7, 2012 | 12:32 PM

SilverBulletZ

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Staging Lane

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From: east stroudsburg pa

head question

so i want to replace the 806s on my 98 z28. i found a set of 243s off a 5.3.... what i read is that they are same head as ls6 but different valve sizes... will these still be good?

Jul 7, 2012 | 01:48 PM

farmington

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From: Little River SC

same heads, same valve sizes.

Jul 7, 2012 | 01:49 PM

omc8

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From: columbus,ohio

Quote:

Originally Posted by SilverBulletZ

so i want to replace the 806s on my 98 z28. i found a set of 243s off a 5.3.... what i read is that they are same head as ls6 but different valve sizes... will these still be good?

They are the same size 2" and 1.55 exhaust , they are different material. LS6 had sodium filled and hallow stem.

Jul 7, 2012 | 02:15 PM

SilverBulletZ

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Staging Lane

Joined: May 2008

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From: east stroudsburg pa

ok so its ok to go with these? im gunna get them ported anyways so im not using the springs or valves in them anyways

Jul 7, 2012 | 09:58 PM

totalchaos

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From: Alberta , Canada

use them.

Jul 8, 2012 | 02:45 AM

2win_SS

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Depends on how much your planning on paying for them. Add cost, port, valve job and valves... It may be cheaper to buy PRC heads for TSP. check the total cost 1st

Jul 9, 2012 | 08:28 PM

SilverBulletZ

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Staging Lane

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From: east stroudsburg pa

ok so i bought them and they are on there way. i paid 300 for them... now what i need to know is what valves and springs to go with? not gunna be doing this all right away will take me some time so im in no hurry just want to get the right stuff... any ideas?

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Jul 10, 2012 | 08:08 PM

SilverBulletZ

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Staging Lane

Joined: May 2008

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From: east stroudsburg pa

these look decent?

Jul 10, 2012 | 08:46 PM

#10

garygnu

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send them to AI or TEA,they do great porting and will supply the valves and springs.

Jul 10, 2012 | 09:51 PM

#11

5w20

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From: Houston , Tx

those look like the ls2 243's

Jul 10, 2012 | 10:30 PM

#12

dr_whigham

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From: Lafayette, LA

Nice triangle castings. Same ones I have. When I send mine to Tooley I plan on turned down LS3 valves, so paying extra for the LS6 valves wasn't needed in my case.

Jul 11, 2012 | 03:04 PM

#13

SilverBulletZ

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Staging Lane

Joined: May 2008

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From: east stroudsburg pa

Not ls2 243s came off a 5.3. And that sounds good just got to save up Alittle more to get them worked. Can't wait to get them on and really wake up my ls1.

Jul 12, 2012 | 04:59 PM

#14

SilverBulletZ

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Staging Lane

Joined: May 2008

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From: east stroudsburg pa

ok guys need some help shopping lol. just got my heads in today. now i need to know what valves and springs to get?... i called my local engine shop and they told me ruffly around 500 to do a port and polish job.

Jul 12, 2012 | 05:13 PM

#15

2win_SS

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So like I post before.

You just payed $300 for heads...

Your going to pay $500 for port and polish...

Idk what cam you have but I would run PRC duals if your going to run a bigger cam... Or 918 for mild can.. So PRC are $300 from TSP. 918s are $200

New valves will be $300 from WS6Store or TSP...

And idk how much you can get a valve job for but I'll just throw out a cheap number so $100

$300+(heads)$300+(springs)$300+(valves)$500+(port/polish)$100(valve job) Thats $1500... Or $1400 for 918 instead of PRC Duals...

For $1500 you could have got PRC 2.5 LS6 heads from TSP.. everything brand new and ready to bolt on.. Those heads are PROVEN. Should have just went that route...

Who knows how good the port polish job will be from your machine shop.

Goodluck on build