Opinions on TSP porting?
Thread Starter
Pro
Joined: Jan 2001
Posts: 649
Likes: 348
From: San Jose CA
Opinions on TSP porting?
I’m looking hard as a set of Sd PC CNC ported Cathedral port heads for my motor build. I spoke with Sd staff, they say these are ported by Texas speed.
https://sdparts.com/i-24529766-sdpc-sdrcnc799stg2-cnc-ported-cathedral-port-cylinder-head-with-dual-springs-and-valves-pair.html?q=Cnc+heads
Curious if anyone has experience TSP’s porting service before?
I know TSP is a very divisive provider. People either seem to love them or hate them. Curious for direct feedback.
this will be going on an LS6
https://sdparts.com/i-24529766-sdpc-sdrcnc799stg2-cnc-ported-cathedral-port-cylinder-head-with-dual-springs-and-valves-pair.html?q=Cnc+heads
Curious if anyone has experience TSP’s porting service before?
I know TSP is a very divisive provider. People either seem to love them or hate them. Curious for direct feedback.
this will be going on an LS6
Instructor
Joined: Oct 2020
Posts: 140
Likes: 45
Those look like their brawler heads:
https://www.texas-speed.com/p-18424-...retainers.aspx
I've never had any issue with TSP. I did not have them port my heads but I don't think you will see a huge difference in power between porting services if done by the well known places. AI, TEA, TSP etc.
If mine were not ported or my car did not come with 243 heads I'd buy those if I found a good deal. Machine work is expensive these days.
https://www.texas-speed.com/p-18424-...retainers.aspx
I've never had any issue with TSP. I did not have them port my heads but I don't think you will see a huge difference in power between porting services if done by the well known places. AI, TEA, TSP etc.
If mine were not ported or my car did not come with 243 heads I'd buy those if I found a good deal. Machine work is expensive these days.
Thread Starter
Pro
Joined: Jan 2001
Posts: 649
Likes: 348
From: San Jose CA
I went ahead and pulled the trigger. I know of a couple people that had bad experiences with TSP years ago but, it’s been a long time. Frankly, I think that Sd PC is one of more solid shops out there and the fact they’re willing to do business tells me that this is good.
Burning Brakes
Joined: Feb 2022
Posts: 897
Likes: 987
From: NW Burbs of Chi-Town
2025 C5 of the Year Finalist - Modified
I have about 17K miles on my TSP ported 243 heads (Brawlers didn't exist). No problems so far. Also TSP Low lift stage IV .550 cam that is great for a street car:
Here is a rather long thread on the HCH mods I did in back 2023:
https://www.corvetteforum.com/forums...-coupe-m6.html
Here is a rather long thread on the HCH mods I did in back 2023:
https://www.corvetteforum.com/forums...-coupe-m6.html
