Cam/Head Combo Advice Requested
Race Director
Joined: Oct 2004
Posts: 12,864
Likes: 4,667
Burning Brakes
Joined: Feb 2022
Posts: 897
Likes: 987
From: NW Burbs of Chi-Town
2025 C5 of the Year Finalist - Modified
I ordered one of these this evening.
https://www.ebay.com/itm/11579323339...EAAOSw8VVkUr8F
They seem to be hens teeth as they are discoed from GM
https://www.ebay.com/itm/11579323339...EAAOSw8VVkUr8F
They seem to be hens teeth as they are discoed from GM
Melting Slicks
Joined: Dec 2004
Posts: 2,847
Likes: 1,144
From: Sleepy Hollow- NJ
Howdy Boys 
I have an 2004 M6 car I recently acquired that was in disrepair [non runner when I bought it] but have now completed phase 2 of the overhaul and she's running, shifting, and most importantly braking now lol I've swapped all the fluids and and now am turning my attention to sprucing up the driveline. At present, it's got 241 heads which from my research are pretty good flowing heads [as most cathedral port heads]. The balance at present has a wobble which is causing the serp belt to chirp at time so it's time for a replacement. I hate doing work twice so since I have to pull the rack, balancer I figured I would mind as well do the cam, timing chain, timing cover, and HV oil pump while I'm in there for piece of mind. So that brings me to my main question...is it worth doing the heads to?
Background / Goals:
Cheers,
Joe
I have an 2004 M6 car I recently acquired that was in disrepair [non runner when I bought it] but have now completed phase 2 of the overhaul and she's running, shifting, and most importantly braking now lol I've swapped all the fluids and and now am turning my attention to sprucing up the driveline. At present, it's got 241 heads which from my research are pretty good flowing heads [as most cathedral port heads]. The balance at present has a wobble which is causing the serp belt to chirp at time so it's time for a replacement. I hate doing work twice so since I have to pull the rack, balancer I figured I would mind as well do the cam, timing chain, timing cover, and HV oil pump while I'm in there for piece of mind. So that brings me to my main question...is it worth doing the heads to?Background / Goals:
- I'm mechanically inclined and do my own work. Swapped out plenty of heads and cams in a gen 1 SBC's
- Not looking to set the world on fire, but close to 400 rwhp would be nice.
- 2004 so LS6 intake.
- Keep 241 heads and have them cleaned up with a valve job and milled for a 64cc chamber.
- Texas Speed 228/232 or Torquer V2 <--anyone with real world experience on either of these cams?
- LS7 lifters
- Trunnion kit for stock rockers.
- Replace 241 heads with a rebuilt set of 243s at $750 buck shipped [ebay rebuilder with 6 month warranty]. I wont be porting as I don't wanna spend an additional grand with AI or TSP.
- Texas Speed 228/232 or Torquer V2 <--anyone with real world experience on either of these cams?
- LS7 lifters
- Trunnion kit for stock rockers.
- ProHeader CNC Ported heads - Super suspicious on this one as its 1/2 the cost of PRC or AI CNC heads but the flow numbers look pretty good. This
- Texas Speed 228/232 or Torquer V2 <--anyone with real world experience on either of these cams?
- LS7 lifters
- Trunnion kit for stock rockers.
Cheers,
Joe
The cam grind you choose should be matched to the heads you end up with. Cam-Motion will do a custom grind for about $500.
With ported 241s, custom 232/236/113+ Cam-Motion cam, stock LS6 intake, ported stock TB, and Kooks Longtubes my MN6 made 418/388 at the wheels on stock '99 injectors with a 4.10 gear. It was at 428rwhp but was running lean at WOT so it was backed down to 418.
With a good set of ported 241 heads, bigger injectors, long tubes and a decent cam you'll easily surpass 400whp in your MN6. If you opt for a FAST intake and larger TB you'll get at least 20 more rwhp. Even more if you port the intake. If you plan to go FI skip the FAST and save a few $ now.
Burning Brakes
Joined: May 2009
Posts: 1,178
Likes: 224
From: Austin Texas
I have first hand experience in both listed cams, with and without heads. I also live 5 miles away from TSP.
I don't have a lot of time to explain everything here, but it sounds like you're on a budget build for max HP / TQ under the curve and great drivability, so I STRONGLY recommend this combo:
TSP 228R cam on 112lsa ( 228 /228 .600 .600 112 LSA )
Used 799 heads (usually cost $200-300)
TSP stg 2 cnc porting and larger valves / mill to 11:1 compression $1000
420 rwhp .... later on add a FAST 92 and LS2 TB, it'll do 440 RWHP
-or-
TSP228r cam only setup w/ LT headers will yield 380rwhp on factory 241 heads.
*799 heads are abundant and cheaper than 243 and the same, except for more expensive sodium filled valves from GM...which doesn't matter since you'll be throwing those away during the cnc stg2 upgrade anyways.
I don't have a lot of time to explain everything here, but it sounds like you're on a budget build for max HP / TQ under the curve and great drivability, so I STRONGLY recommend this combo:
TSP 228R cam on 112lsa ( 228 /228 .600 .600 112 LSA )
Used 799 heads (usually cost $200-300)
TSP stg 2 cnc porting and larger valves / mill to 11:1 compression $1000
420 rwhp .... later on add a FAST 92 and LS2 TB, it'll do 440 RWHP
-or-
TSP228r cam only setup w/ LT headers will yield 380rwhp on factory 241 heads.
*799 heads are abundant and cheaper than 243 and the same, except for more expensive sodium filled valves from GM...which doesn't matter since you'll be throwing those away during the cnc stg2 upgrade anyways.
