225 as cast or 243 2.5 from ts?
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Teching In
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225 as cast or 243 2.5 from ts? Ok for starters this is in a 2004 gto.. It is a street driven car that may see some occasional track time. I figured id post again since my first post didn't get any hits
current mods
pacesetter longtube
k&n fipk
tsp 228r cam
tsp pushrods
comp cams trunion upgrade
ls2 chain.
ported ls6 pump
I am going to order the heads this week and would like to hear some opinions of which set you would choose and why?
Im kind of stuck between the two heads and I plan to change the cam again also. Im not chasing dyno numbers I just want the combo to perform the best it can.
current mods
pacesetter longtube
k&n fipk
tsp 228r cam
tsp pushrods
comp cams trunion upgrade
ls2 chain.
ported ls6 pump
I am going to order the heads this week and would like to hear some opinions of which set you would choose and why?
Im kind of stuck between the two heads and I plan to change the cam again also. Im not chasing dyno numbers I just want the combo to perform the best it can.
If you have the funds I would go for the aftermarket casting...they would have a higher ceiling in my opinion bc of aftermarket design. That being said the Texas speed heads are proven so you can't wrong with either, search some dyno results to compare to a combo similar to yours
Thread Starter
Teching In
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Well they are both around the same ballpark price wise, so that's not big deal. I think I'm going to go with the as cast 225s. Also the thicker deck should allow for a little more PTV cleafance.,that is also a plus. I'm also thinking about just biting the bullet And getting a cam ground for it. I know of quite a few places,but can anyone recommend somebody that works good magic with ls cams that they have had a good experience with..
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I have the heads below and from a street driven POV I'm not entirely happy with them. WOT over 3k RPM that go like a raped ape. Way down low they just plain old feel soggy. Less bottom end tq. Next time around I'm either going back to stock ish heads with a turbo or AFR210's.
I think the 220cc intake is just too big for stock cubes if you are picky about how streetable a car is. And I'm very picky.
I think the 220cc intake is just too big for stock cubes if you are picky about how streetable a car is. And I'm very picky.
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Verdad Gallardo Thread Starter
Teching In
Joined: Nov 2011
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Do you think the cars going to be sluggish with the right combo.? Why would a 225 be too big if the combo is properly matched? Any insight?
I understand they are on the large side but so are most heads for an Ls. Even factory ported castings have large runners
I understand they are on the large side but so are most heads for an Ls. Even factory ported castings have large runners
I'd do the PRC As Casts if I had to choose between the two. But, I'd suggest you goto Brian Tooley and get the TFS 220s As Cast with hand porting from Tooley with PM guides installed (for stock rockers) and turned-down LS3 valves... that's $2200 or so. He has them on the shelf, ready to go.
TSP's stock castings are around 225cc as well.
Remember, LS6 castings are 210cc stock. Porting them a bit opens them up. I don't know anyone who has smaller than 220cc runners for stock ported 243s.
If you want 215cc runners or smaller, PRC 215s, TFS 215s, AFR 215 or 210s are your choices. I guess MAST has 215 as well that's the old ETP head.
TSP's stock castings are around 225cc as well.
Remember, LS6 castings are 210cc stock. Porting them a bit opens them up. I don't know anyone who has smaller than 220cc runners for stock ported 243s.
If you want 215cc runners or smaller, PRC 215s, TFS 215s, AFR 215 or 210s are your choices. I guess MAST has 215 as well that's the old ETP head.
Of course, the final decision is up to you, but for the money you can't beat the 225cc As-Cast heads. Aftermarket casting with a thicker deck surface, laid over valve angle and slightly better flow than our 2.5 LS6s....
All of this for only $100 more than the 2.5 LS6s.
Can't go wrong with either, but my vote is for the As-Cast 225s!
All of this for only $100 more than the 2.5 LS6s.
Can't go wrong with either, but my vote is for the As-Cast 225s!
Can tsp do a turned down ls3 valve option to cut weight? Has anybody used the as cast heads and sent them off for porting anywhere? They seem like they would put up a good fight vs the trickflow as cast 220.
How does the ptv clearance compare to a stock 241 head with stock ls1 head gaskets. I would like to do the .040 gasket to get better quench if/when I do a head swap and Im pretty close with my stock 241s and stock gasket .051 thick I think? I havent measured my ptv clearance so its be nice to know if I could just bolt these on and go.
How does the ptv clearance compare to a stock 241 head with stock ls1 head gaskets. I would like to do the .040 gasket to get better quench if/when I do a head swap and Im pretty close with my stock 241s and stock gasket .051 thick I think? I havent measured my ptv clearance so its be nice to know if I could just bolt these on and go.
Head Options No dis-respect to any of the sponsors here. But IMO I would give Brian Tooley a call and discuss. I spoke with what I think are the 3 main ones on here, TSP, Tick Performance, and Tooley racing. They all were great to deal with, actually I bought my rotating assembly from TSP but I went with Tooley on the heads and a special ground cam. I started a thread before I bought my new head/cam combo. It got ugly quickly!!! Ask all of the questions that you can to get informed with your options. There is alot of people on here that say this and that, however I like to actually see facts and there were only 2 that could supply me any.In the end you can't go with anyone mentioned you just have to go with whomever you feel the most comfort with.
Good luck as you have some very important decisions to make.
https://ls1tech.com/forums/generatio...ease-come.html
Good luck as you have some very important decisions to make.
https://ls1tech.com/forums/generatio...ease-come.html
Last edited by Bama99z; Nov 23, 2013 at 02:05 PM. Reason: Added Thread Link
Thread Starter
Teching In
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I too would like to know how the ptv clearance is affected with the larger valves and the raised deck. From my experience I always check but would like to hear how its affected. I would also like to know how much more it is to turn down some ls3 vavles for the heads?
I really appreciate everyones input and hope to keep it coming.
I really appreciate everyones input and hope to keep it coming.
Can tsp do a turned down ls3 valve option to cut weight? Has anybody used the as cast heads and sent them off for porting anywhere? They seem like they would put up a good fight vs the trickflow as cast 220.
How does the ptv clearance compare to a stock 241 head with stock ls1 head gaskets. I would like to do the .040 gasket to get better quench if/when I do a head swap and Im pretty close with my stock 241s and stock gasket .051 thick I think? I havent measured my ptv clearance so its be nice to know if I could just bolt these on and go.
How does the ptv clearance compare to a stock 241 head with stock ls1 head gaskets. I would like to do the .040 gasket to get better quench if/when I do a head swap and Im pretty close with my stock 241s and stock gasket .051 thick I think? I havent measured my ptv clearance so its be nice to know if I could just bolt these on and go.
PTV clearance is increased over a GM casting due to a 13.5* valve angle and 3/4" thick deck surface.
We do not cut down LS3 valves. We do offer aftermarket hollow stem valves and could have a custom 2.060" valve made for the as-cast, but to be honest a 2.060" valve is not really big enough to warrant the decrease in weight by going to a hollow stem.
PTV clearance is increased over a GM casting due to a 13.5* valve angle and 3/4" thick deck surface.
PTV clearance is increased over a GM casting due to a 13.5* valve angle and 3/4" thick deck surface.
Thanks for the info Beau, can you post what the valves that come stock with this head weigh? And the hollow stem valves you mentioned as well. If you guys were to custom spec a cam for these heads what would specs look like?
