What Heads to get?
04-23-2012, 09:27 PM
#1
Burning Brakes
Thread Starter
What Heads to get?
I have a 00 C5 that I want to upgrade the heads. I have LT's, Blackwing, ported T/B, ported LS6 intake, and Corsa exhaust as my only mods. Not interested in a bigger cam, just heads. I have taller valve covers also, so maybe a good rocker arm upgrade as well. Any suggestions?
04-23-2012, 09:32 PM
#2
Melting Slicks
I would suggest a bigger cam just stay small and get some heads to match make a nice easy to drive setup. I assume you don't want a cam for drivability issues but a cam does not have to mean hard to drive.
04-23-2012, 10:05 PM
#3
Race Director
Heads alone aren't going to get you much, at all. A larger cam makes the engine need more air, and that's where heads help.
As mentioned, you can get a smallish cam to get some good numbers with still good driveability.
But if you're intent on heads, my only suggestion would be to get a set of used 243's from a C6. Direct bolt on replacement and you can find a set for about $400. Spending thousands on Trickflows or AFRs would be a waste.
As mentioned, you can get a smallish cam to get some good numbers with still good driveability.
But if you're intent on heads, my only suggestion would be to get a set of used 243's from a C6. Direct bolt on replacement and you can find a set for about $400. Spending thousands on Trickflows or AFRs would be a waste.
04-23-2012, 10:27 PM
#4
Race Director
Waste of time and money to do heads only. You can pick up some power heads only but for the money vs what you will gain ...not worth it . Better off doing a cam with stock heads and the rest of mods 
04-23-2012, 11:56 PM
#5
Race Director
I installed a set of Patriot Stage 2 heads with 59cc chambers on my 04 ($1095). I also went with a cam though. Made a big difference over what I had.
04-24-2012, 12:09 AM
#6
Race Director
Heads are in my future but the cam 228 230 580 581 113 LSA with all the springs,pushrods, new tune, etc. really woke up the headers, CAI, other bolt ons I already had!
my $00.02
04-24-2012, 02:27 AM
#7
Le Mans Master
depends on budget. you can get a set of 243 heads for 350 from ebay and spend a few hundred to have them resealed, valve job and milled for a 20 or so hp boost.
04-25-2012, 08:52 AM
#9
Team Owner
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DO NOT open the engine up, just for heads.
Stage 2 heads, Patriot or the like with springs, 224 228 cam 113
time chain, and a tune.
Nothing too wild, but you will like the ride
Stage 2 heads, Patriot or the like with springs, 224 228 cam 113
time chain, and a tune.
Nothing too wild, but you will like the ride
04-25-2012, 03:29 PM
#10
Le Mans Master
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2023 C2 of the Year Finalist - Modified
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Heads alone aren't going to get you much, at all. A larger cam makes the engine need more air, and that's where heads help.
As mentioned, you can get a smallish cam to get some good numbers with still good driveability.
But if you're intent on heads, my only suggestion would be to get a set of used 243's from a C6. Direct bolt on replacement and you can find a set for about $400. Spending thousands on Trickflows or AFRs would be a waste.
As mentioned, you can get a smallish cam to get some good numbers with still good driveability.
But if you're intent on heads, my only suggestion would be to get a set of used 243's from a C6. Direct bolt on replacement and you can find a set for about $400. Spending thousands on Trickflows or AFRs would be a waste.
the expense of the heads and installation worth while you will need to spend-----------------------------------------
more money ( not 4or5 hunded) say 2500 to 3000. These
kinds of heads will flow well even with a stock cam. And they will
be worth the expense in the end.
Don't listen to just my thoughts ask a professional and they will
agree with me . Been there done that.
will good flow even with a stock cam.
04-25-2012, 06:08 PM
#11
Burning Brakes
Thread Starter
So some think just getting better flowing heads is a waste without a bigger cam? 
04-25-2012, 06:50 PM
#12
Melting Slicks
Plenty more power can be made with stock heads. There are cars running stock heads but with a cam like the G5X3 from LG, with long tubes, putting down 450hp.
Don't waste your money.
Don't waste your money.
04-25-2012, 10:55 PM
#13
[QLlUOTE=n8dogg;1580651023]Plenty more power can be made with stock heads. There are cars running stock heads but with a cam like the G5X3 from LG, with long tubes, putting down 450hp.
Don't waste your money.[/QUOTE]
Get a mild Cam and go for some 5.3 heads and have them ported by AI. I have to agree that heads alone won't gain you much. If you are looking for seat of the pants feel, change your gear to a 4.10 and leave everything else alone! You will love it!
Don't waste your money.[/QUOTE]
Get a mild Cam and go for some 5.3 heads and have them ported by AI. I have to agree that heads alone won't gain you much. If you are looking for seat of the pants feel, change your gear to a 4.10 and leave everything else alone! You will love it!
04-26-2012, 12:43 AM
#15
Instructor
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This is a great option, however, I would still want to have a fresh VJ
mill and put new spring/seals on which can cause the total expendature
to rise to 8-900 dollars. The gain would be about 20-25 rwhp even with
the stock cam since the compression will jump about 3 tenths. I'd
probably send the stock 241 heads to Advanced Inductions for a sweet
cnc job/springs, etc. and ask Phil what cam he'd suggest for stock-like
driving manners. Something in the 218-226 duration range. This heads/
cam sorta setup will usually be worth 60-70 rwhp.
mill and put new spring/seals on which can cause the total expendature
to rise to 8-900 dollars. The gain would be about 20-25 rwhp even with
the stock cam since the compression will jump about 3 tenths. I'd
probably send the stock 241 heads to Advanced Inductions for a sweet
cnc job/springs, etc. and ask Phil what cam he'd suggest for stock-like
driving manners. Something in the 218-226 duration range. This heads/
cam sorta setup will usually be worth 60-70 rwhp.
04-26-2012, 09:44 AM
#17
Race Director
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I opted to send off my 243's for a port,polish, mil (.59cc) along with G5X2, ported FAST 92, supporting mods... I am right at 450to the tires... didn't break the bank either... Doing heads, w/o cam is like having a beautiful woman with no @@@@@... just not right.
04-26-2012, 07:12 PM
#18
Melting Slicks
