Anyone sell replacement 4.3 heads with Ls1 valves?

BATMAN · 07-14-2006, 04:46 PM

I thought I saw some thread where someone/shop does/did a 4.3 head work and replaced the smaller stock valves with the LS1.

Will this yield SYTY HP normally aspirated?

s10ls · 07-14-2006, 05:04 PM

Quote: Originally Posted by BATMAN

I thought I saw some thread where someone/shop does/did a 4.3 head work and replaced the smaller stock valves with the LS1.

there was a guy that used ls1 1.7 rocker arms on vortec heads

Quote: Originally Posted by BATMAN

Will this yield SYTY HP normally aspirated?

no, not even close

Dan Plante · 07-14-2006, 05:41 PM

Nothing you can do without spending lots of $$ will ever get you sy/ty hp n/a because the sy/ty had 285hp well probably more like 325 but they had to lower the number so nothing would have more hp than the Corvette in 92-93 and you can't achieve that with a n/a 4.3 without a lot of work.

07-14-2006, 04:46 PM	#1
BATMAN Registered User Join Date: Feb 2004 Posts: 218 Location: User is: OffLine	Anyone sell replacement 4.3 heads with Ls1 valves? I thought I saw some thread where someone/shop does/did a 4.3 head work and replaced the smaller stock valves with the LS1. Will this yield SYTY HP normally aspirated?
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07-14-2006, 05:04 PM	#2
s10ls Registered User Age: 86 Join Date: May 2003 Posts: 2,546 Location: orlando/englewood User is: OffLine	Re: Anyone sell replacement 4.3 heads with Ls1 valves? Quote: Originally Posted by BATMAN I thought I saw some thread where someone/shop does/did a 4.3 head work and replaced the smaller stock valves with the LS1. there was a guy that used ls1 1.7 rocker arms on vortec heads Quote: Originally Posted by BATMAN Will this yield SYTY HP normally aspirated? no, not even close
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07-14-2006, 05:41 PM	#3
Dan Plante Registered User Age: 33 Join Date: Jul 2001 Posts: 3,850 Location: Franklin, MA User is: OffLine	Re: Anyone sell replacement 4.3 heads with Ls1 valves? Nothing you can do without spending lots of $$ will ever get you sy/ty hp n/a because the sy/ty had 285hp well probably more like 325 but they had to lower the number so nothing would have more hp than the Corvette in 92-93 and you can't achieve that with a n/a 4.3 without a lot of work.
	[Reply w/Quote]