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07-20-2022, 03:59 PM
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#1 |
  Drives: 2018 Camaro SS 1LE Join Date: Jul 2018
Location: Stuttgart, Germany
Posts: 807
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Exhaust Valves? (Supercharged LT1)
Greetings!
Restarting on our LT1 build for my SS 1LE with LT4 blower. I'm considering new exhaust valves on the OEM LT1 heads. I've already received the Ti LT4 intake valves...to reduce chances of valve float (@ ~6900 rpm). Combination is mild 700 CHP build for extended street runs and some circuits. Manleys? REV's? New OEM? Thanks! 
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07-20-2022, 04:55 PM
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#2 | |
        
Drives: 2017 Camaro 2SS A8 Join Date: Aug 2018
Location: Petersham MA
Posts: 4,758
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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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07-20-2022, 06:14 PM
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#3 | |
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Drives: 2020 LT1 M6 Join Date: Jan 2016
Location: South, the DEEP south
Posts: 1,114
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07-21-2022, 10:30 AM
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#4 |
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Old badass
Drives: 14GMC 2.9 16GMC Turbos 2020Silv.6.2 Join Date: Mar 2020
Location: Arlington Tx
Posts: 240
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What can be done about the seats? I understand they have a habit of falling out per TS.
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I've had 7 Camaro's. All gone...for now.
Current build in progress 2016 GMC4x4 RCSB twin hair dryers ~1k whp fbe port inj 1/8 mi & stealth street terror  |
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07-21-2022, 11:45 AM
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#5 | |
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Drives: 2017 Camaro 2SS A8 Join Date: Aug 2018
Location: Petersham MA
Posts: 4,758
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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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07-21-2022, 12:23 PM
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#6 |
Drives: '20 ZLE Join Date: Jun 2020
Location: Mile High
Posts: 3,562
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Well, if you really want the world's best/fastest racing valves and seats, contact my son's company here https://www.mwracing.eu/en/mw-racing/
Yes, they are expensive for most of us, but not for Ferrari et al.
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'20 ZL1 1LE A10,
OEM short block, LME heads/valve train, E2650. 100+ octanes, no eth, no meth, no N2O. 2/23 - 1031/1004 wheel. 4/23 - 1.41/9.61/145 at DA 7000 ft. (only made five passes). 2/24 - LME 390, E2650, FBO, 100 oct.; 1116hp/ 1063tq; 109 oct. dyno next. |
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07-21-2022, 01:36 PM
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#7 |
Drives: 2016 1SS NFG A8 Join Date: Aug 2017
Location: 46804
Posts: 6,800
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Inconel. Can have the seats reworked on your stock heads.
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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 |
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07-21-2022, 02:09 PM
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#8 |
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Drives: 2018 Camaro SS 1LE Join Date: Jul 2018
Location: Stuttgart, Germany
Posts: 807
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Appreciate the comments.
Our HP goal is quite conservative and likely inconel would be wasted on our build. We would like fresh exhaust valves and curious what aftermarket offers as a suitable replacement or a step up within reasonable cost. Possibly leaning toward OEM's or this Manley set: https://gwatneyperformance.com/produ...1-lt4-12349-8/ Thanks.
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07-21-2022, 04:01 PM
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#9 |
Drives: 2022 Lt1 A10 Join Date: Nov 2015
Location: clark, mo
Posts: 8,860
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I made 850 plus on my Magnuson 16 SS Camaro with stock heads, stock valves, I did have a valve job done after I broke the stock Lt1 motor, only because we did new springs and Cam. I would have liked to have had a better set of heads but didn't really think it was necessary at my power level. Back to the question, I've run Manley on many of my motors in the past, I also ran Manley Forged internals except the crank in the 1st built motor. Yes there was another. haha
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2022 Lt1 6.2 A10, Maggie 2300, THPSI Port Inj/10 rib, Rotofab, E, Nickey, SCOL, Griptech, RC Bandits, Hoosiers/MT 9.80@142.96 1.44 60ft, 6.34@112 707/669 RWHP/TRQ. 16SS Maggie 2650 9.41@147 1.35 60ft, 5.99@119. 16 C7 A8 10.90@128 Bolt on stuff
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07-25-2022, 06:48 AM
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#10 |
Drives: 2016 2SS coupe 2015 3LT Stingray Join Date: Aug 2012
Location: El paso texas
Posts: 880
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Ferrea super alloy exhaust valves Katech sells them
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Ported intake manifold and throttle body kooks 2" headers no cats
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07-25-2022, 12:15 PM
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#11 |
  Drives: 2015 Camaro ZL1 Join Date: Oct 2020
Location: Clinton Twp, Michigan
Posts: 249
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OEM valves will do the job at that power level.
If you want to upgrade we stock Ferrea Super Alloy exhaust valves. There is no reason to buy a heavy SS exhaust if it isn't Inconel. |
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07-25-2022, 12:32 PM
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#12 | |
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Drives: 2022 Lt1 A10 Join Date: Nov 2015
Location: clark, mo
Posts: 8,860
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Quote:
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2022 Lt1 6.2 A10, Maggie 2300, THPSI Port Inj/10 rib, Rotofab, E, Nickey, SCOL, Griptech, RC Bandits, Hoosiers/MT 9.80@142.96 1.44 60ft, 6.34@112 707/669 RWHP/TRQ. 16SS Maggie 2650 9.41@147 1.35 60ft, 5.99@119. 16 C7 A8 10.90@128 Bolt on stuff
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07-25-2022, 12:40 PM
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#13 |
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Drives: 2016 1SS NFG A8 Join Date: Aug 2017
Location: 46804
Posts: 6,800
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I agree...I said Inconel thinking OP wanted the best after reading the first few posts. Certainly isn't needed for a mild build and there are several mid level options that will work fine along with OEM.
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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 |
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07-25-2022, 04:32 PM
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#14 | |
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Drives: 2017 Camaro 2SS A8 Join Date: Aug 2018
Location: Petersham MA
Posts: 4,758
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Quote:
__________________
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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