Go Back   LS1TECH > LS1-LS2-LS3-LS6-LS7 PERFORMANCE > Generation IV Internal Engine
Sign in using an external account
Register Forgot Password?
Search

Generation IV Internal Engine
2005-2014 LS2 | LS3 | LS7 | L92 | LS9
Sponsored by
ERL Performance

View Poll Results: Which will get closest to 620-650FWHP for the least $$
418 LS3 reusing AI CNC 243's...cost $0 7 24.14%
418 LS3 using TFS/WCCH Edlebrock heads + aftermarket intake...$3500 7 24.14%
418 LS3 CNC LS3 heads/ FAST LSXR or L92 truck intake...$2500-3300 11 37.93%
418 LS3 TFS/WCCH Edlebrock heads reusing stock TBSS intake...$3000 4 13.79%
Voters: 29. You may not vote on this poll

418 LS3...243, TFS, or LS3 heads????

Reply
 
Thread Tools Search this Thread
Old 04-17-2009, 06:49 AM   #1
TECH Apprentice
 
pharmd's Avatar
 
Trader Rating: 4
Join Date: Nov 2006
Posts: 313
Default 418 LS3...243, TFS, or LS3 heads????

Working on a budget here so please give this some significant thought...

07' TBSS AWD, previously with AI CNC 243's, 226/230 cam, vig 3200 stall and the usual bolt-ons, 4800lb, -300DA, ran 12.18 @ 109-110...Shortblock spun a rod, so must rebuild. I'm thinking of 418 LS3 or 440 LS7, I'd definitely go LS7 if I had the $$, but we have other expenses right now. Based on my calculations I believe I need to make 620-650hp at the crank...we would like to trap "close" to 120mph in 0 DA weather...My concern with my plan is am I going to make enough power with a cathedral port aftermarket head or CNC LS3 head to warrant the added expense over just re-using my 243's for now?

If I go with TFS (NOT fast as cast) or WCCH edlebrock heads I'm talking $2500, + rockers, + intake, + fuel rails, + maybe a fabbed fuel line, then depending upon which intake I may have to modify the front accessory drive. So I'm out probaby $3500 minimum.

If I go with CNC LS3 heads then I'm talking $1900, intake rockers, pedistals, intake which would either be the FAST LSXR (BEST option, but may not be out soon enough) or L92 truck intake (more cost effective, be obviously not the big power maker), along with fuel rails etc, and possibly an accessory drive change. So I'm out probably $2500-$3300 depending upon which intake is chosen.

Option 3 is reuse my heads on the 418 LS3, which wouldn't cost me anything.

Option 4 is bite the bullet and go LS7 440, then use some stock LS7 heads/intake. I haven't looking into this option much so I really am unsure about pricing.

Which option will get me closest to my goal of 620 - 650hp fly wheel for the least $$...I'm also considering the TFS/WCCH Edlebrock option and re-using my stock TBSS intake for now, then switch the intake out later when $$ are available...Then I'd just be out pretty much for the heads/rockers for now....

Please throw in your thoughts....
__________________
02 Camaro SS "Corner Carver" under development. B2 Motorsports, Bluecat Tuning, Dexter Racing, Strano, BLS, UMI, Forgestar, Corbeau, Turn 1, Griffin, Wilwood, Powerslot, Carbotech, ARH, Koni
pharmd is offline   Reply With Quote
Old 04-18-2009, 07:20 PM   #2
TECH Regular
 
texada's Avatar
 
Trader Rating: 3
Join Date: Jun 2004
Location: alexandria, La
Posts: 453
Default

If I was on a strict budget like you, I would just use my LS6 Heads and when I had some more money I would do the LS3 Head combo.
texada is offline   Reply With Quote
Old 04-22-2009, 01:12 PM   #3
TECH Fanatic
 
Trader Rating: 1
Join Date: Nov 2007
Location: NJ
Posts: 1,179
Default

dont go for max power you have a very heavy suv so build some thing with good power from 3000 to your shift point. id stay TF heads they will get you little more TQ over all which you need to get that moving. If you want build the 440 stay with your heads for now at later time move to TF 235 or TF245

High revs and high hp is Great for track only cars and very light cars
BigRich954RR is offline   Reply With Quote
Old 04-27-2009, 11:25 AM   #4
LS1TECH Sponsor
 
Jason 98 TA's Avatar
 
Trader Rating: 4
Join Date: Nov 2001
Location: Texas!
Posts: 4,160
Default

Don't rule out the PRC 237cc LS cylinder heads. We recently had several LS3's on the engine dyno making 670-700 flywheel horsepower with those heads & high 240 duration camshafts!
__________________
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 98 TA is offline   Reply With Quote
Old 04-27-2009, 06:07 PM   #5
TECH Fanatic
 
Trader Rating: 1
Join Date: Nov 2007
Location: NJ
Posts: 1,179
Default

I keep forgetting about the PRC 237 very nice head too. You Guys have to list all the spec of this head again. I think it has a very nice thick deck like .700 or some thing

Last edited by BigRich954RR; 04-27-2009 at 06:18 PM..
BigRich954RR is offline   Reply With Quote
Old 04-27-2009, 06:07 PM
LS1Tech
Pontiac Firebird




Paid Advertisement
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Next project - 402 or 418 stroker - piston question JakeFusion Generation IV Internal Engine 75 09-21-2014 11:44 AM
427ls7 vs 440tfs dyno graph gnx7 Dynamometer Results & Comparisons 34 09-11-2014 11:14 PM
Ported 243 heads versus stock L92 mrvedit Generation IV Internal Engine 29 03-19-2014 09:17 AM
the best heads for a 440 bugy Generation IV Internal Engine 46 09-20-2012 09:33 PM
243 headed 418+ ci LS3 pharmd Dynamometer Results & Comparisons 2 04-16-2009 09:39 PM


Tags
243, 700, build, head, heads, hp, intake, ls3, ls6, ls7, na, ported, speed, texas, tfs, truck, wcch


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are Off



Join Ls1Tech

All times are GMT -5. The time now is 04:47 AM.


Powered by vBulletin® Version 3.8.7 AC1
Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.
Advertising - Terms of Service - Privacy Statement - JOBS
Emails & Contact Details