head dilemma..port 853's or buy 243's
04-22-2009 | 04:40 PM
#1
head dilemma..port 853's or buy 243's so i have some serious lifter tick and am thinking about pulling the heads soon...but my question is, once i have the heads off, would i be better off buying a set of stock 243's and having them milled, or sending out my 853's to TSP and having them milled, cleaned, ported, etc? im only looking to spend around $500 on the heads and i was wondering what would net me the best gains? im looking to mill them to around 62cc's also and running a stock size headgasket (keep it cheap)...thanks!
04-22-2009 | 05:15 PM
#3
i'm in the same boat man i have a thread just below yours and i'm trying to decide if i should buy a set of 243's and have them ported or port my 241's that i already have.. no money really to spend so i'm trying to go cheap and gain some ponies cause my cam is choked on air right now
04-22-2009 | 06:08 PM
#5
well im only looking to build a high 10's car after a 150 shot and im really trying to keep cost down, so spending 1k on a set of heads is out of the question for me right now...just looking to see which setup would outperform the other ported 853 vs. stock 243
04-22-2009 | 11:13 PM
#6
Buy 243's.... with very little work I've seen them pick up 35rwhp over LS1 castings. In fact I have seen them in stock form move more wind on a flow bench and make more power than I have seen some ported versions do. Stock 243's ARE THE BEST BANG FOR THE BUCK OUT THERE!
04-22-2009 | 11:16 PM
#7
so i have some serious lifter tick and am thinking about pulling the heads soon...but my question is, once i have the heads off, would i be better off buying a set of stock 243's and having them milled, or sending out my 853's to TSP and having them milled, cleaned, ported, etc? im only looking to spend around $500 on the heads and i was wondering what would net me the best gains? im looking to mill them to around 62cc's also and running a stock size headgasket (keep it cheap)...thanks!
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04-23-2009 | 09:06 AM
#8
We're running a small run of cnc ported 241s in the stage 1.5 flavor for $800 without springs. This combo is a little over your budget, but you could also sell your stock heads to get back some cash.. 
I'd definately prefer the cnc ported LS6, but for $800 it's pretty hard to beat...
I'd definately prefer the cnc ported LS6, but for $800 it's pretty hard to beat...
__________________
Jason
Co-Owner, Texas Speed & Performance, Ltd.
2005 Twin Turbo C6
404cid Stroker, 67mm Twins
994rwhp/902lb ft @ 22 psi (mustang dyno) www.Texas-Speed.com
Jason
Co-Owner, Texas Speed & Performance, Ltd.
2005 Twin Turbo C6
404cid Stroker, 67mm Twins
994rwhp/902lb ft @ 22 psi (mustang dyno) www.Texas-Speed.com
04-23-2009 | 01:18 PM
#12
Stock unmodified 243s really are a tremendous value. I've seen virgin untouched 243 heads make an easy 25rwhp over stock 853s and 241s day in and day out. Add a good valve job and some milling and you're looking at close to a 40rwhp gain. Something to consider when on a budget.
__________________
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
04-23-2009 | 01:28 PM
#13
Buy 243's.... with very little work I've seen them pick up 35rwhp over LS1 castings. In fact I have seen them in stock form move more wind on a flow bench and make more power than I have seen some ported versions do. Stock 243's ARE THE BEST BANG FOR THE BUCK OUT THERE!
Stock unmodified 243s really are a tremendous value. I've seen virgin untouched 243 heads make an easy 25rwhp over stock 853s and 241s day in and day out. Add a good valve job and some milling and you're looking at close to a 40rwhp gain. Something to consider when on a budget.
04-23-2009 | 01:50 PM
#14
I see it this way.. you can have your existing heads checked, milled, re-built, new seals, etc... and then P&P, (I can't see all this happening for less than 500, but that's another story), and you've spent your money, and will be maxed out on what they can do.
Or, Spend a little more and get some brand-new 243's for just under 600 shipped.. You'll still pick up some power but have the potential for more down the road...
Or, Spend a little more and get some brand-new 243's for just under 600 shipped.. You'll still pick up some power but have the potential for more down the road...
04-23-2009 | 02:11 PM
#15
Keep in mind the PRC LS6 heads are on special for $1000 a set. It's hard to buy a set of LS6 heads, have them broken down, valve job, milling all done for $1000.
The PRC cylinder heads ship fully cnc ported, valve job, milling & assembled using brand new cores to your specs!!
http://www.texas-speed.com/shop/item...d=649&catid=20
The PRC cylinder heads ship fully cnc ported, valve job, milling & assembled using brand new cores to your specs!!
http://www.texas-speed.com/shop/item...d=649&catid=20
__________________
Jason
Co-Owner, Texas Speed & Performance, Ltd.
2005 Twin Turbo C6
404cid Stroker, 67mm Twins
994rwhp/902lb ft @ 22 psi (mustang dyno) www.Texas-Speed.com
Jason
Co-Owner, Texas Speed & Performance, Ltd.
2005 Twin Turbo C6
404cid Stroker, 67mm Twins
994rwhp/902lb ft @ 22 psi (mustang dyno) www.Texas-Speed.com
04-23-2009 | 02:16 PM
#16
Keep in mind the PRC LS6 heads are on special for $1000 a set. It's hard to buy a set of LS6 heads, have them broken down, valve job, milling all done for $1000.
The PRC cylinder heads ship fully cnc ported, valve job, milling & assembled using brand new cores to your specs!!
The PRC cylinder heads ship fully cnc ported, valve job, milling & assembled using brand new cores to your specs!!
04-23-2009 | 02:27 PM
#17
ok so now im definitely looking at just picking up a set of stock 243's and milling them to around 62cc's...any machine shop should be able to mill them right? and how far do they need to be milled from stock to reach that cc level? thanks for the help guys!
