Problems when Supercharged.Starting issue
Thread Starter
Le Mans Master
Joined: Sep 2013
Posts: 7,137
Likes: 3,176
From: Kannapolis MA.
Problems when Supercharged.Starting issue
Second season supercharged,camed GS.Couple months in.Starter and harness cooked.
Location of cats are a issue.Driving in heat another issue.
Checking forum anyone else.Now other issue.Sometimes display goes dead,won't start with engine light only on.
Last time.Lights wouldn't even shut off.
Sucks took the dependability right out of the car for a additional 100 horsepower.
It is a reputable shop that just specializes in the LS only.
Location of cats are a issue.Driving in heat another issue.
Checking forum anyone else.Now other issue.Sometimes display goes dead,won't start with engine light only on.
Last time.Lights wouldn't even shut off.
Sucks took the dependability right out of the car for a additional 100 horsepower.
It is a reputable shop that just specializes in the LS only.
Race Director
Joined: Apr 2000
Posts: 15,344
Likes: 4,008
From: Texas
Have no idea what you're saying other than unhappy with how the car is running.....or not.
- So basically you got a **** tune. LTx tuning is different than LSx
- If wires and such are melting that's a **** poor install. If you tell us you're running 3-4 hour endurance races then it's poor design by the shop, a poor install, and you shouldn't have factory cats.
A car that picks up 100hp via a supercharger and what has to be a super mild cam should have OEM equivalent manners.
You've offered no other data for troubleshooting so the best anyone can do is agree with you....the car is broke.
- So basically you got a **** tune. LTx tuning is different than LSx
- If wires and such are melting that's a **** poor install. If you tell us you're running 3-4 hour endurance races then it's poor design by the shop, a poor install, and you shouldn't have factory cats.
A car that picks up 100hp via a supercharger and what has to be a super mild cam should have OEM equivalent manners.
You've offered no other data for troubleshooting so the best anyone can do is agree with you....the car is broke.
Thread Starter
Le Mans Master
Joined: Sep 2013
Posts: 7,137
Likes: 3,176
From: Kannapolis MA.
The location of the factory cats near the starter is a serious problem when supercharging.A added cam that keeps driveability with a automatic is important.
Driving in 90 degree heat moving is one thing.Stopped at long lights or stop and go ain't keeping water temps.happy.
So since this is my 3rd.starter in maybe 10k miles.The solution for stock cat placement in the C7 minus Z06 is Headers and no cats.Headers tuner wants are 3 months out.Plus coating them.
Did I know supercharging would cause starter trouble,No.Headers are gonna add more horses.Got 570 to the wheels now.Gonna be Louder,Prouder.
Once your in,ya have to keep building to be better.Hopefully.
Driving in 90 degree heat moving is one thing.Stopped at long lights or stop and go ain't keeping water temps.happy.
So since this is my 3rd.starter in maybe 10k miles.The solution for stock cat placement in the C7 minus Z06 is Headers and no cats.Headers tuner wants are 3 months out.Plus coating them.
Did I know supercharging would cause starter trouble,No.Headers are gonna add more horses.Got 570 to the wheels now.Gonna be Louder,Prouder.
Once your in,ya have to keep building to be better.Hopefully.
Racer
Joined: Sep 2020
Posts: 423
Likes: 389
From: CO
Maybe these would help?
https://www.designengineering.com/c7...verter-shield/
Article by Hib Halverson:
https://www.corvettemagazine.com/200...-heat-shields/
https://www.designengineering.com/c7...verter-shield/
Article by Hib Halverson:
https://www.corvettemagazine.com/200...-heat-shields/
Race Director
Joined: Apr 2000
Posts: 15,344
Likes: 4,008
From: Texas
The location of the factory cats near the starter is a serious problem when supercharging.A added cam that keeps driveability with a automatic is important.
Driving in 90 degree heat moving is one thing.Stopped at long lights or stop and go ain't keeping water temps.happy.
So since this is my 3rd.starter in maybe 10k miles.The solution for stock cat placement in the C7 minus Z06 is Headers and no cats.Headers tuner wants are 3 months out.Plus coating them.
Did I know supercharging would cause starter trouble,No.Headers are gonna add more horses.Got 570 to the wheels now.Gonna be Louder,Prouder.
Once your in,ya have to keep building to be better.Hopefully.
Driving in 90 degree heat moving is one thing.Stopped at long lights or stop and go ain't keeping water temps.happy.
So since this is my 3rd.starter in maybe 10k miles.The solution for stock cat placement in the C7 minus Z06 is Headers and no cats.Headers tuner wants are 3 months out.Plus coating them.
Did I know supercharging would cause starter trouble,No.Headers are gonna add more horses.Got 570 to the wheels now.Gonna be Louder,Prouder.
Once your in,ya have to keep building to be better.Hopefully.
Sounds like reman starters being used. Break. Z06 and ZR1 with more hp and same cats and cat location do not have this issue. Break. I see multiple stock exhaust Z06s and a couple ZR1s regularly at SCCA time trial events. Break
20 - 30 minute sessions on track in 100*+ TX heat. Break. No starter issues on those cars. Break. I'm n/a and 570 to the wheels. 416, Big cam, no issues. Break. Break. Over
Thread Starter
Le Mans Master
Joined: Sep 2013
Posts: 7,137
Likes: 3,176
From: Kannapolis MA.
[QUOTE=westsdad;1609009238]Maybe these would help?
/QUOTE]
Thanks for that.This family business. So happens to be the next town over from me.Has cars shipped to his speciality shop of LS Engines only.In late model corvette or camaro and custom with this powerplate.
I mentioned wrapping,aftermarket high temp starters ect.His answer: You wanna drive a supercharged LS in 90 plus weather? You must remove the cats.Or don't let it idle and sit.He suggested headers early.I tried without.
Appreciate your suggestion. If others have wrapped and it works? Please post for others.
I want more noise and horses anyway.🤑
Appreciate your Help.Man you take alot of ,Breaks😂
Do you actually know if this works yourself? Or is this your research?? Want to post a real fix you personally seen and or experienced.
I was warned about cat issues when first supercharging.I would've saved two starters and labor toward header purchase and labor.
Have Billy Boat cat delete adjustable rear exhaust. Sick of them Mustangs revving with my top down with no comeback 😂
/QUOTE]
Thanks for that.This family business. So happens to be the next town over from me.Has cars shipped to his speciality shop of LS Engines only.In late model corvette or camaro and custom with this powerplate.
I mentioned wrapping,aftermarket high temp starters ect.His answer: You wanna drive a supercharged LS in 90 plus weather? You must remove the cats.Or don't let it idle and sit.He suggested headers early.I tried without.
Appreciate your suggestion. If others have wrapped and it works? Please post for others.
I want more noise and horses anyway.🤑
Do you actually know if this works yourself? Or is this your research?? Want to post a real fix you personally seen and or experienced.
I was warned about cat issues when first supercharging.I would've saved two starters and labor toward header purchase and labor.
Have Billy Boat cat delete adjustable rear exhaust. Sick of them Mustangs revving with my top down with no comeback 😂
Race Director
Joined: Apr 2000
Posts: 15,344
Likes: 4,008
From: Texas
Appreciate your Help.Man you take alot of ,Breaks😂
Do you actually know if this works yourself? Or is this your research?? Want to post a real fix you personally seen and or experienced.
I was warned about cat issues when first supercharging.I would've saved two starters and labor toward header purchase and labor.
Have Billy Boat cat delete adjustable rear exhaust. Sick of them Mustangs revving with my top down with no comeback 😂
If heat is trashing your starters then I think you have another issue. Either the tune is off and/or your passenger cat is partially clogged. Either can be easily checked by getting the car to temp and checking with an IR gun. If the passenger side cat is substantially hotter than the drivers side, it's the cat. If you put the car on a lift with it running and both cats are showing 1,000+ degrees, you have a tune issue.
I'll be brutally frank....570whp is fun.....but it's not a lot on a supercharged car these days. As mentioned before the 2019 ZR1 has higher hp and runs the same cats and doesn't have starter issues.
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Thread Starter
Le Mans Master
Joined: Sep 2013
Posts: 7,137
Likes: 3,176
From: Kannapolis MA.
I told you above what works. You mention "top down" which implies a convertible .
I'll be brutally frank....570whp is fun.....but it's not a lot on a supercharged car these days. As mentioned before the 2019 ZR1 has higher hp and runs the same cats and doesn't have starter issues.
I'll be brutally frank....570whp is fun.....but it's not a lot on a supercharged car these days. As mentioned before the 2019 ZR1 has higher hp and runs the same cats and doesn't have starter issues.
Is that ZR1 have the same exhaust manifold design?
Meaning same distance from starter to cats?
Temps where High 80's the other day.Went for a 60 mile run.Mostly non highway.Water temps are a steady 215.When say a drivethrew idleing hardly moving,temps go just under 230 with AC on.
It will cool right down when moving.The headers are about 3 months out.Must be demand? Not sure of brand but it is what the tuner wants with my setup.
Deposit for parts:Non refundable.
Getting anxious for the added power and hopefully many:Miles and Smiles.Especially Reving at Mustang owners...Ha
Race Director
Joined: Apr 2000
Posts: 15,344
Likes: 4,008
From: Texas
Yes,It is a vert.Appriciate your Help,Bigly!
Is that ZR1 have the same exhaust manifold design?
Meaning same distance from starter to cats?
Temps where High 80's the other day.Went for a 60 mile run.Mostly non highway.Water temps are a steady 215.When say a drivethrew idleing hardly moving,temps go just under 230 with AC on.
It will cool right down when moving.The headers are about 3 months out.Must be demand? Not sure of brand but it is what the tuner wants with my setup.
Deposit for parts:Non refundable.
Getting anxious for the added power and hopefully many:Miles and Smiles.Especially Reving at Mustang owners...Ha
Is that ZR1 have the same exhaust manifold design?
Meaning same distance from starter to cats?
Temps where High 80's the other day.Went for a 60 mile run.Mostly non highway.Water temps are a steady 215.When say a drivethrew idleing hardly moving,temps go just under 230 with AC on.
It will cool right down when moving.The headers are about 3 months out.Must be demand? Not sure of brand but it is what the tuner wants with my setup.
Deposit for parts:Non refundable.
Getting anxious for the added power and hopefully many:Miles and Smiles.Especially Reving at Mustang owners...Ha
The cat is in the same location on the LT1 cars, Z06, and ZR1.....Right next to the starter. You'll see mixed info on the part number listings, but they're interchangeable.
Your water temps are quite high. Airflow to the radiator is partially blocked by an intercooler?
Below are my temps this weekend. >100* outside air temp, ~20 minute session on track. OEM thermostat. I do have a larger radiator but 20 minutes on a race track in 100* heat is a lot more stressful than a highway drive in the upper 80s
.
