upgrade 243s
A customer sent us a link to this awhile back. I hate that I don't have much time to participate very often as this is a good/common question. On upgrading heads in general, we recommend in all cases that you sell what you have and start with a blank canvas. It isn't that all modified heads cannot be improved, but starting over is often a better value in the long term. From wear issues, to the fact that there are various styles of port that require different modifications to be improved, you'll typically get a much better return buying X upgrade outright and selling your current setup to recoup a proportion of the cost.
Our full CNC work and labor, the most popular option for the GM castings, is $995. We have common options from $495 to $1195 for the 241/243/799/706/821/823/etc. GM castings. The typical gain for our port work is 30-50hp over whatever the head managed as-cast from GM. With 243's it is generally 4Xrwhp on the ubiquitous Dynojet. If you want to spend $1400, we can certainly go farther.
That is an option (for as cast or ported heads) that most don't know we offer. Our Performance Rebuild package is cleaning/inspection, CNC'd performance oriented valve jobs, precision valve grinding, milling to any volume or valve location, and reassembly for your application. The labor cost is $495.
Good luck with your project!
Thanks very much for the kind words, guys!
-Phil
Our full CNC work and labor, the most popular option for the GM castings, is $995. We have common options from $495 to $1195 for the 241/243/799/706/821/823/etc. GM castings. The typical gain for our port work is 30-50hp over whatever the head managed as-cast from GM. With 243's it is generally 4Xrwhp on the ubiquitous Dynojet. If you want to spend $1400, we can certainly go farther.
That is an option (for as cast or ported heads) that most don't know we offer. Our Performance Rebuild package is cleaning/inspection, CNC'd performance oriented valve jobs, precision valve grinding, milling to any volume or valve location, and reassembly for your application. The labor cost is $495.
Good luck with your project!
Thanks very much for the kind words, guys!
-Phil
Thanks for helping out the lsx community tho AI, like others stated, all I hear is good things from your work.
idk, i know that he flowed them, and his flowbench is the same as TSP's...tsp's website says "no exhaust pipe. just seems odd that he hit the exact numbers on exhaust as tsp did, but way lower on the intake...idk, he's going to fix them up tho!
they advertise 313cfm@.600. he got 278cfm@.600...crappy considering stock is 260cfm (or so...)
he also said they were ported to large in one area and its really killing velocity. idk, im not trying to bash here, and im no head expert either.
really wish i could've seen more real world results on AI vs. TSP heads. really glad AI put some info in this thread.
they advertise 313cfm@.600. he got 278cfm@.600...crappy considering stock is 260cfm (or so...)
he also said they were ported to large in one area and its really killing velocity. idk, im not trying to bash here, and im no head expert either.
really wish i could've seen more real world results on AI vs. TSP heads. really glad AI put some info in this thread.
idk, i know that he flowed them, and his flowbench is the same as TSP's...tsp's website says "no exhaust pipe. just seems odd that he hit the exact numbers on exhaust as tsp did, but way lower on the intake...idk, he's going to fix them up tho!
they advertise 313cfm@.600. he got 278cfm@.600...crappy considering stock is 260cfm (or so...)
he also said they were ported to large in one area and its really killing velocity. idk, im not trying to bash here, and im no head expert either.
really wish i could've seen more real world results on AI vs. TSP heads. really glad AI put some info in this thread.
they advertise 313cfm@.600. he got 278cfm@.600...crappy considering stock is 260cfm (or so...)
he also said they were ported to large in one area and its really killing velocity. idk, im not trying to bash here, and im no head expert either.
really wish i could've seen more real world results on AI vs. TSP heads. really glad AI put some info in this thread.
https://ls1tech.com/forums/generatio...orted-ls6.html
