243 Goat Heads
This is a discussion on 243 Goat Heads within the Internal Engine forums, part of the LSx Technical Help Section category; Will they fit a LS1 head? I got a good deal going down if they do!...
07-27-2008, 10:24 PM #1
243 Goat Heads
Will they fit a LS1 head? I got a good deal going down if they do!
07-27-2008, 10:34 PM #2
Bump for Morning Crew
07-27-2008, 11:08 PM #3rednariGuest
Yes. But check your pushrods for correct length.
07-28-2008, 03:52 AM #4
07-28-2008, 05:46 AM #5
they will make very little power over the stock heads with the stock cam, ESPECIALLY if you still have an LS1 intake (I can't remember )
07-28-2008, 06:05 AM #6
well here you go... im going to be putting bigger valves, bigger cam in the car and i have a ls6 intake... and will putting the works like spring works on the head... now those 243 heads aren't like the ls6 heads?
07-28-2008, 03:25 PM #7
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07-28-2008, 06:02 PM #8
07-29-2008, 07:40 PM #9
07-30-2008, 05:00 AM #10
243 is the casting number. LS6 and LS2 heads both use this "243" casting BUT have different valves.
Its worth the swap if you can find a cheap set. I got mine (before I upgraded) off a 05 GTO whos owner swapped for AFRs.
Last edited by DocEwww; 07-30-2008 at 05:02 AM.
07-31-2008, 11:12 AM #11
If you had something to compliment them like more cam/less crappy intake, etc, I'm sure that they are worth some power.
I'm not going by what I have read though, I'm going by what I have seen when I say this.
07-31-2008, 11:57 AM #12
thanks frost for the info and everyone else im going with 243 heads and getting a cam custom to what my heads are going to be modified to
08-02-2008, 03:10 AM #13
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08-02-2008, 07:16 AM #14
08-02-2008, 07:38 PM #15
The first one was a few years ago, and I don't really remember what it put it down. About 2 months ago I had a 99 WS6 M6 with LTs and true duals, lid, pulley, and stock 243 heads (stock cam) and LS6 intake. The car made 335rwhp. By comparison, the user here gnictry's car made the same about a month prior. Her car had eBay headers, lid, and catback and made the same numbers... and it was an auto. I had a full boltons car make 338rwhp a few weeks back on the same dyno. It was a 6-speed.
Like I said, if they were worth something with the stock cam, it wasn;t enough to point out.
At a bare minimum get those things milled down. The bump in compression makes power and is cheap to have done.
08-08-2008, 01:22 PM #16
be careful when going to larger valves and big cams with a small ls1 bore. there's interference valve to bore.
or maybe i'm just thinking of the 5.3. it's been a long time.
08-17-2008, 05:44 PM #17
08-17-2008, 06:54 PM #18
I agree with Frost.....the work doesn't justify the minimal gains of simply swapping to 243's. Frost didn't say you wouldn't gain anything, he said what you gained wouldn't be much and I agree with that. If you're doing other things at the same time it would be worth it but not just to swap heads. Save 'em until you can do an intake,cam, and headers and then do all of that at once.
08-17-2008, 09:24 PM #19
08-19-2008, 12:54 PM #20
[QUOTE=0rion;1603232]why would he pull the cam and do all that work to lose hp though?
He was tracing an engine noise that began after his cam swap and ended up pulling the 224 cam. I was just impressed that his car made the same rwhp with the stock ls6 heads and ls6 intake that it did with the 224 cam only setup. We keep trying to talk him into putting the cam back in now that he has the heads and intake installed. I have a clip of his car idling next to my 98 Trans Am, and Frost had it idling exactly like my bolt on TA.
Last edited by DKITCHEN; 08-21-2008 at 12:03 AM.
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