04-25-2023, 09:21 AM | #1 |
Drives: 2017 Camaro SS Join Date: Jun 2021
Location: Waldorf, MD
Posts: 36
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Stock LT1 valves
Alright, so I just did a few upgrades to my 17SS. Gpi SS2 cam, gm performance upgraded lifters, btr dual springs, hardened pushrods, c5r timing chain and arp head studs and rod end bolts. Already on E and have a ported Msd and 2” headers.
I’m worried about the valves though. I was watching a YouTube series where this kid did a ss3 cam and after a month of driving he broke 2 valves and ended up destroying both heads and a few pistons and sleeves. He was revving to 7300 rpm and said it was the pressure on the valve from the springs that caused them to shear at high rpm. I don’t know if it’s true or not but I DO NOT want this to happen to me. Do you guys thing I’ll be good with the stock valves if I’m only revving to 7k? I’ve heard these cars have some issues with stock valve train but I thought it was from the springs not the valves. Should I have done valves too? I didn’t think about it while I was doing the heads to be honest. I sent them out to a machine shop and had everything cleaned and milled and totally forgot to get valves. What are you guys thoughts? |
04-25-2023, 09:41 AM | #2 |
Drives: Chevrolet Camaro Join Date: Apr 2022
Location: Maryland
Posts: 134
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I've been beating on mine for about a year at 7,100, no issues yet. Plenty of cammed cars running around without issues.
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Procharger P1X, CSP Big Boy Cam, CSP Headers, LT4 HPFP, LT4 Injectors, JMS BAP - 722WHP
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04-25-2023, 09:49 AM | #3 |
Drives: 2022 Camaro 2SS A10 Join Date: Jul 2022
Location: FL
Posts: 524
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Assume you got rid of the stock aluminum pistons and replaced with forged rods and pistons?
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2022 Camaro 2SS/ Whipple 3.0 / 2"Headers/ PRC LTX Heads/ Forged Internals/LT4 fueling/ DSX Aux/
DSX Flex Fuel/ Meth Injection/ Katech 112 TB/ RotoFab Big Gulp/ Corsa NPP/ Various exterior mods |
04-25-2023, 09:50 AM | #4 |
Drives: 2016 1SS NFG A8 Join Date: Aug 2017
Location: 46804
Posts: 6,806
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Some of the stock head failures are from aggressive cam lobes causing "valve bounce" and that tears up the valve seats. BTR revealed these issues even with their own products through spintron testing. Hence why they revamped their cam lineup to remedy the issue. GPI cams have a reputation for being hard on valvetrain parts from what I have seen. I wouldn't expect your valve train to live a long life at 7k with those parts imo. I would put a set of fully worked heads on it.
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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 |
04-25-2023, 10:10 AM | #5 |
Drives: Chevrolet Camaro Join Date: Apr 2022
Location: Maryland
Posts: 134
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If your question was directed toward me, stock pistons and rods.
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Procharger P1X, CSP Big Boy Cam, CSP Headers, LT4 HPFP, LT4 Injectors, JMS BAP - 722WHP
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04-25-2023, 10:40 AM | #6 |
Drives: 2017 Camaro SS Join Date: Jun 2021
Location: Waldorf, MD
Posts: 36
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So in other words, your saying I have theoretically built myself a ticking time bomb??
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04-25-2023, 11:51 AM | #7 | |
Drives: 2015 Camaro ZL1 Join Date: Oct 2020
Location: Clinton Twp, Michigan
Posts: 250
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Quote:
We use stock valves in every build that doesn't opt for titanium and we have never dropped a seat or broken a valve. We do Spintron all of our valvetrain sets ups to insure we have the best/most durable package possible. |
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04-25-2023, 12:26 PM | #8 | |
Drives: 2017 Camaro SS Join Date: Jun 2021
Location: Waldorf, MD
Posts: 36
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Quote:
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04-25-2023, 01:14 PM | #9 |
Drives: 2022 Camaro 2SS A10 Join Date: Jul 2022
Location: FL
Posts: 524
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Actually, I was asking OP
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2022 Camaro 2SS/ Whipple 3.0 / 2"Headers/ PRC LTX Heads/ Forged Internals/LT4 fueling/ DSX Aux/
DSX Flex Fuel/ Meth Injection/ Katech 112 TB/ RotoFab Big Gulp/ Corsa NPP/ Various exterior mods |
04-25-2023, 01:38 PM | #10 |
Drives: Chevrolet Camaro Join Date: Apr 2022
Location: Maryland
Posts: 134
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No need for forged pistons and rods on a H/C setup.
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Procharger P1X, CSP Big Boy Cam, CSP Headers, LT4 HPFP, LT4 Injectors, JMS BAP - 722WHP
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04-25-2023, 01:46 PM | #11 |
Drives: 2017 Camaro SS Join Date: Jun 2021
Location: Waldorf, MD
Posts: 36
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04-25-2023, 01:47 PM | #12 |
Drives: 2017 Camaro SS Join Date: Jun 2021
Location: Waldorf, MD
Posts: 36
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04-25-2023, 03:59 PM | #13 |
Drives: 2022 Camaro 2SS A10 Join Date: Jul 2022
Location: FL
Posts: 524
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what are your dyno numbers? rwhp and torque?
As for lifters... I use only Johnsons- too any documented failures on LS7s but some have good luck with them.
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2022 Camaro 2SS/ Whipple 3.0 / 2"Headers/ PRC LTX Heads/ Forged Internals/LT4 fueling/ DSX Aux/
DSX Flex Fuel/ Meth Injection/ Katech 112 TB/ RotoFab Big Gulp/ Corsa NPP/ Various exterior mods |
04-25-2023, 04:40 PM | #14 |
Drives: 2017 Camaro SS Join Date: Jun 2021
Location: Waldorf, MD
Posts: 36
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Mine aren’t ls7 lifters lol. They’re gm performance racing lifters. Good for 8k rpm tried and true. I have no idea the power yet because I haven’t dynoed the car yet. I haven’t even started it lol. I still have to put the radiator and intake back on and start it. Hoping for mid 500’s with the cam.
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