04-10-2020, 02:36 PM | #1 |
Drives: 17 SS a8 Join Date: Feb 2010
Location: omaha
Posts: 1,678
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Heads: mast vs cid vs prc
Having choices in aftermarket castings is kind of new to the lt world. I don’t think there is much known about any of them but maybe some comparisons can be made to the same brand ls counter parts? Also there are some flow charts but not identical conditions so what is that worth?
The cid heads look cool. Here is a set from lme with flow numbers. Something like $5400 all loaded up. Ti and Inconel valves and good springs. https://www.latemodelengines.com/ind...lt4/cid-1.html Here are some from mast. Pretty much the same price once loaded up. They are not 6 bolts like the cid heads but currently that is of no use. The flow numbers are down but i don’t know the test conditions. https://www.mastmotorsports.com/prod...-cylinder-head Then the prc heads. They are more like $3000 but you can’t select an inconel exhaust valve. I called on this and the guy on the phone said it wasn’t even an option, that seems odd to me. I will be bouncing off the 2 step at times. I think I need the Inconel. https://www.texas-speed.com/p-9209-p...der-heads.aspx Thoughts?
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dropped a valve in the 6.2. now running a drop in rods and piston 5.3
best et 5.83@121 with the 5.3 http://www.camaro6.com/forums/showthread.php?t=465472 |
04-10-2020, 03:43 PM | #2 |
Drives: 2016 1SS NFG A8 Join Date: Aug 2017
Location: 46804
Posts: 6,796
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The CID heads were flowed on a larger bore(4.125) then a stock LT1/4(4.065) and If I had to guess the PRC and Mast were flowed on a stock bore. I also would like to see data for all lift ranges on the CID because the low lift numbers are equally if not more important.
That being said the PRC look really good for the money but I would agree on the Inconel valve for the exhaust. I kind of like the Mast heads with Stainless hollow intake and Inconel exhaust with polished dual spring kit. Shouldn't need any more valve spring then that unless you plan on going solid roller or really aggressive hyd cam.
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2016 NFG 1SS A8
Options-2SS Leather/NPP Perf. mods-Whipple 2.9/Fuel System/Flex Fuel/103mm TB/Rotofab Big Gulp/Cat Deletes/Corsa NPP Per. times- 10.5 @ 137 w/ 1.8 60ft Full weight on 20's 1200DA |
04-10-2020, 05:00 PM | #3 |
Drives: 2017 Camaro 2SS A8 Join Date: Aug 2018
Location: Petersham MA
Posts: 4,749
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They’re all great options, IMO. Mast has a killer track record with the LS engines and I wanted to run something different, so that’s why I went with them. But all of those aftermarket heads run nice 3/4” thick decks too and flow well. Probably can’t go wrong with any of them.
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2017 Chevy Camaro 2SS A8 Whipple 3.0, Mast Black Label heads, Fore triple in-tank pumps, 112mm TB, LPE +52% injectors, LPE BB HPFP, 15” conversion 1059 WHP/944 WTQ, 9.48@150
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04-14-2020, 01:03 AM | #4 |
Drives: 2017 TT ZL1 TH400 Join Date: Dec 2018
Location: City Of Angels
Posts: 356
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Just purchased a set of CID Heads. Max effort fully loaded with incolnel valves and TI. Doing a TT ZL1 build with Huron Speed. Sent Parish a message hopefully he answers.
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2017 TT Camaro ZL1 / TH400 / LME 416 / LME CID HEADS / Huron TT 68/71 106 / Crawford Port Injection / Holley EFI / AEROSPACE Components fronts and rears / 15" Weld Beadlocks / Torqbyte Methanol Kit / Prometh Trunk Tank / Plazmaman Intake
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04-14-2020, 11:47 AM | #5 |
Drives: SS 6 speed of course Join Date: Jan 2016
Location: Hilo, HI
Posts: 4,316
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Since you are boosted, I don’t think ultimate flow numbers mean all that much. Txspeed look good, titanium intake, you can have them order Manley exhaust inconel and install. I’d go inconel for turbo.
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Forged short block, large duration sub .600 lift Cam Motion cam, 7200 RPM fuel cut, Pray Ported Heads, 3.85 pulley D1X, stage II intercooler, DSX secondary low side, DSX E85 sensor, Lingenfelter big bore 2.0 pump, ported front cats, 60608 Borla, LT4 injectors, ZL1 1LE driveshaft and Katech ported TB, ported MSD intake, BTR valvetrain, ARP studs, ProFlow valves, PS4 tires.
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04-15-2020, 02:44 PM | #6 |
Drives: 17 SS a8 Join Date: Feb 2010
Location: omaha
Posts: 1,678
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I have been trying to talk to someone at Texas speed and find out if they can put some Inconel valves in their heads. I can’t get anyone to return my email and the wait time is long on the phone. Also I am not 100% confident in whoever it is that might pick up the phone. They seem really busy.
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dropped a valve in the 6.2. now running a drop in rods and piston 5.3
best et 5.83@121 with the 5.3 http://www.camaro6.com/forums/showthread.php?t=465472 |
04-15-2020, 02:47 PM | #7 | |
Drives: 17 SS a8 Join Date: Feb 2010
Location: omaha
Posts: 1,678
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Quote:
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dropped a valve in the 6.2. now running a drop in rods and piston 5.3
best et 5.83@121 with the 5.3 http://www.camaro6.com/forums/showthread.php?t=465472 |
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04-15-2020, 03:11 PM | #8 |
Drives: 2016 1SS NFG A8 Join Date: Aug 2017
Location: 46804
Posts: 6,796
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It is important for sure but that doesn't mean the dual .660 lift springs won't handle that task. It depends on how aggressive the cam is combined with the boost. Your setup might call for a 1209x.
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2016 NFG 1SS A8
Options-2SS Leather/NPP Perf. mods-Whipple 2.9/Fuel System/Flex Fuel/103mm TB/Rotofab Big Gulp/Cat Deletes/Corsa NPP Per. times- 10.5 @ 137 w/ 1.8 60ft Full weight on 20's 1200DA |
04-15-2020, 07:52 PM | #9 |
Drives: SS 6 speed of course Join Date: Jan 2016
Location: Hilo, HI
Posts: 4,316
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Most of my FI experience was with 4v engines, so I was caught flat footed when the boost and valve spring pressure came up. I have TSP .660 springs and my first cam was a TSP cam, it is my opinion that TSP uses really aggressive ramp profiles. So I would NOT boost on said cam profile with said .660 springs. Or I was just unlucky??
I really think that a custom profile from Cam Motion is the way to go. My .596 lift gentle profile cam seems to have no issues with boost and 7300 RPM now (want to do 0-60 in first gear just for grins, figure I'm losing .4 seconds right on the shift, gotda keep up with King). I'm still on the .660 springs and kit. Had to spend a lot of time with measuring push rods (had not done that in years). Manley has a pretty good write up on valve bounce and why you need Inconel. That convinced me for sure the stock hollow intake is just a boost disaster waiting to happen.
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Forged short block, large duration sub .600 lift Cam Motion cam, 7200 RPM fuel cut, Pray Ported Heads, 3.85 pulley D1X, stage II intercooler, DSX secondary low side, DSX E85 sensor, Lingenfelter big bore 2.0 pump, ported front cats, 60608 Borla, LT4 injectors, ZL1 1LE driveshaft and Katech ported TB, ported MSD intake, BTR valvetrain, ARP studs, ProFlow valves, PS4 tires.
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05-01-2020, 09:18 AM | #10 |
Drives: Turbo 6.2 Join Date: Feb 2019
Location: Buffalo
Posts: 702
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Are you staying with LT1 heads or upgrading to LT4 style head?
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2016 Turbo Camaro SS - 800hp/900tq 9.7@146
2018 LTZ Z71 Redline Silverado - 381hp/420tq 13.8@100 |
05-15-2020, 11:19 PM | #11 | |
Drives: 2016 Camaro Join Date: Oct 2017
Location: Texas & Uncle Sam's Choice
Posts: 123
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Quote:
You can check out the Kateck LTK heads. They flow LS7 numbers, but the cost is premium at $6,999.99. The intake port is 327cc and it uses a 2.2" intake valve. So, you need a big bore cylinder. They use these heads on their N/A LT1-427 to make 700HP. https://store.katechengines.com/kate...eads-p854.aspx Take a look at the Gwatney Performance Ported LT1 heads. These have 320cc intake ports. They flow big numbers and are priced right at $2,190.00 a pair. You'd have to call them for the intake valve size. https://gwatneyperformance.com/produ...ylinder-heads/
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2024 Chevrolet 3500HD Z71, LTZ, 4x4, 6.6 ltr. L5P long-bed.
2016 Camaro 2SS Six-speed, Hotchkis sway bars, Eibach .750" drop springs, Mamo throttle body, E85, BMR stuff. 2006 Quicksilver 6-speed GTO ERL LS3-430, All-Pro 285cc heads, 262/273 .758/.742 116+3 cam, Sheet-metal Intake, 70lb Siemens injectors, SLP, GMM Ripshifter, QA1 Coil-overs front and rear, nylon suspension bushings, Hotchkis, RPM Trans, SPEC twin clutch, SpinTech, Kooks 1 7/8 -2.0", BMR drive train, Kaaz 3.91, Lingenfelter CAI, Baer brakes, mini-tubs, E85. |
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05-16-2020, 07:23 AM | #12 | |
Drives: 2017 Camaro 2SS A8 Join Date: Aug 2018
Location: Petersham MA
Posts: 4,749
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Quote:
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2017 Chevy Camaro 2SS A8 Whipple 3.0, Mast Black Label heads, Fore triple in-tank pumps, 112mm TB, LPE +52% injectors, LPE BB HPFP, 15” conversion 1059 WHP/944 WTQ, 9.48@150
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