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LT1 Supercharged Reliability

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Old Sep 23, 2025 | 04:23 PM
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Default LT1 Supercharged Reliability

I recently supercharged my M7 Grand Sport with the V3-Si A&A kit. I am on the CARB-compliant tune, and everything is stock other than the blower and a cat-back. The car put down 572 WHP on their dyno.

I was under the impression that on these LT1s, as long as you keep them under around 650-700 WHP, you should be safe without having to strengthen internals. However, the owner of A&A advised against doing 60-130 pulls, as I am risking blowing the motor. I want to be able to actually push the car and not worry about ruining my entire engine. Based on experience, have any LT1 owners had issues around the same power level that I am currently at? I don't like feeling like my car is on thin ice, and I can't push it how I want without fear of blowing my engine.

Should I just try to trade for a Z06 at this point? I still want more power, but I don't feel safe pushing this car even more without strengthening the internals.


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Old Sep 24, 2025 | 04:50 PM
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Originally Posted by jake_vette
I recently supercharged my M7 Grand Sport with the V3-Si A&A kit. I am on the CARB-compliant tune, and everything is stock other than the blower and a cat-back. The car put down 572 WHP on their dyno.

I was under the impression that on these LT1s, as long as you keep them under around 650-700 WHP, you should be safe without having to strengthen internals. However, the owner of A&A advised against doing 60-130 pulls, as I am risking blowing the motor. I want to be able to actually push the car and not worry about ruining my entire engine. Based on experience, have any LT1 owners had issues around the same power level that I am currently at? I don't like feeling like my car is on thin ice, and I can't push it how I want without fear of blowing my engine.

Should I just try to trade for a Z06 at this point? I still want more power, but I don't feel safe pushing this car even more without strengthening the internals.

If your tuner sucks then it will pop on a WOT rip from 0-100. The LT1 isn’t as weak as people make seem… just **** tuners turning off knock sensors. I recommend an LT4 high side and JMS voltage booster+ flex sensor. Leave the boost at 8psi max. Run an e50-e60 blend and the car will love it.

I’m currently running e60 no meth on 7psi. Car runs like a beast!

I recommend Internet Ninjas or Greg Huggins. The Gen v’s are very complex and only a handful of people understand how to tune them. I found Greg on HPTuners forum. The guy is very knowledgeable and patient

at minimum you need an LT4 Highside + delete the stock check valve and replace with leignfelter check valve. You also need the baro breakout to properly tune them with a centri
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Old Sep 25, 2025 | 06:51 PM
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With a Procharger kit and nothing else making 570 whp 530 rwtq in Texas heat I did probably over 100 40-150 pulls. 30k street miles and some 30 track days where the car saw 250+ coolant temp. + a couple of missed 4th gears.

you’ll be peeeeeeeerfectly fine if your tune isn’t crap.
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Old Sep 29, 2025 | 01:31 AM
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Originally Posted by jake_vette
I recently supercharged my M7 Grand Sport with the V3-Si A&A kit. I am on the CARB-compliant tune, and everything is stock other than the blower and a cat-back. The car put down 572 WHP on their dyno.

I was under the impression that on these LT1s, as long as you keep them under around 650-700 WHP, you should be safe without having to strengthen internals. However, the owner of A&A advised against doing 60-130 pulls, as I am risking blowing the motor. I want to be able to actually push the car and not worry about ruining my entire engine. Based on experience, have any LT1 owners had issues around the same power level that I am currently at? I don't like feeling like my car is on thin ice, and I can't push it how I want without fear of blowing my engine.

Should I just try to trade for a Z06 at this point? I still want more power, but I don't feel safe pushing this car even more without strengthening the internals.
Wait, did A&A install and tune your car? I picked up that same kit from Andy weeks ago and he said he'll tune it for me also and he told me the same thing not to push it but maybe he was just being conservative and he's like 2 hours me from me so i'm still debating. How was the install and how's the car drives after Andy tuned it any quirks?
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Old Sep 29, 2025 | 02:09 AM
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Yea I had them do the install and tune for me. I did throw a CEL like three times for some air flow sensor which Andy was able to fix by tweaking the tune but other than that it's been fine. I just don't like that he's said multiple times that I shouldn't be doing 60-130 pulls or really be pushing the car too hard, yet most other comments I see on here and from other shops say that I should be fine as long as the tune isn't ****
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Old Sep 29, 2025 | 02:13 AM
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Originally Posted by Dreloc
Wait, did A&A install and tune your car? I picked up that same kit from Andy weeks ago and he said he'll tune it for me also and he told me the same thing not to push it but maybe he was just being conservative and he's like 2 hours me from me so i'm still debating. How was the install and how's the car drives after Andy tuned it any quirks?
Yea I had them do the install and tune for me. I did throw a CEL like three times for some air flow sensor which Andy was able to fix by tweaking the tune but other than that it's been fine. I just don't like that he's said multiple times that I shouldn't be doing 60-130 pulls or really be pushing the car too hard, yet most other comments I see on here and from other shops say that I should be fine as long as the tune isn't ****
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Old Sep 29, 2025 | 02:35 AM
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Originally Posted by BrunoTheMellow
With a Procharger kit and nothing else making 570 whp 530 rwtq in Texas heat I did probably over 100 40-150 pulls. 30k street miles and some 30 track days where the car saw 250+ coolant temp. + a couple of missed 4th gears.

you’ll be peeeeeeeerfectly fine if your tune isn’t crap.
Good to know! Who did your install and tune?
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Old Sep 29, 2025 | 02:35 AM
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Originally Posted by Petera90
If your tuner sucks then it will pop on a WOT rip from 0-100. The LT1 isn’t as weak as people make seem… just **** tuners turning off knock sensors. I recommend an LT4 high side and JMS voltage booster+ flex sensor. Leave the boost at 8psi max. Run an e50-e60 blend and the car will love it.

I’m currently running e60 no meth on 7psi. Car runs like a beast!

I recommend Internet Ninjas or Greg Huggins. The Gen v’s are very complex and only a handful of people understand how to tune them. I found Greg on HPTuners forum. The guy is very knowledgeable and patient

at minimum you need an LT4 Highside + delete the stock check valve and replace with leignfelter check valve. You also need the baro breakout to properly tune them with a centri
Roger that I'll check it out. Thank you for the info
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Old Sep 29, 2025 | 01:06 PM
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Did he tell you why? Did he recommend anything like LT4 HPFP and LT4 injectors? Did he say it was due to keeping the car CARB compliant? I have been running a Procharger and headers for about two years with stock internals on 93 octane. I did half mile runs at Texas Mile to 0-150's.
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Old Sep 29, 2025 | 08:42 PM
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Originally Posted by jake_vette
Good to know! Who did your install and tune?
I installed. AMP in Dallas did the tune.
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Old Sep 30, 2025 | 02:34 PM
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my buddy had a 15 z51 with a centrifical blower on it headers tune. 550 whp and beat on the car like a rented mule. zero issues
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Old Sep 30, 2025 | 04:18 PM
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Originally Posted by 994719
Did he tell you why? Did he recommend anything like LT4 HPFP and LT4 injectors? Did he say it was due to keeping the car CARB compliant? I have been running a Procharger and headers for about two years with stock internals on 93 octane. I did half mile runs at Texas Mile to 0-150's.
No not really he just said if I do plan on beating on it to put a bottle of Torco in it as well. Upon further research it seems that stuff can cause additional issues so I've just been running 91 pump gas. Also unsure if the CARB compliant tune is the issue, but it seems everyone has the same consensus that if the tune isn't ****, then I should be fine, but I went with A&A to do the install and tune since I figured they would be one of the safest options. After spending nearly $9,000 for the install and tune, hearing that I can't push the car safely doesn't sit well with me.
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Old Sep 30, 2025 | 04:19 PM
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Originally Posted by 9sec
my buddy had a 15 z51 with a centrifical blower on it headers tune. 550 whp and beat on the car like a rented mule. zero issues
Do you know which shop did the tune for him?
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Old Sep 30, 2025 | 04:22 PM
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I agree, why put the supercharge on if you cant use it. I had a few reasons why I didn't go with A&A, this just adds to the list. If you are looking for another tuner I used Pat G, very knowledgable and easy to work with.
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Old Sep 30, 2025 | 04:44 PM
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Hopefully Andy will reply here. I can't see why that rwhp should be an issue.

What rpm are you at for a 60 hit?
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Old Sep 30, 2025 | 06:14 PM
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Originally Posted by 994719
I agree, why put the supercharge on if you cant use it. I had a few reasons why I didn't go with A&A, this just adds to the list. If you are looking for another tuner I used Pat G, very knowledgable and easy to work with.
Thanks I'll check him out. What else about A&A made you not want to go with them?
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Old Sep 30, 2025 | 06:16 PM
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Originally Posted by Eshoremd
Hopefully Andy will reply here. I can't see why that rwhp should be an issue.

What rpm are you at for a 60 hit?
I do 60 rolls in 3rd gear and it's slightly above 3.5k RPM
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Old Oct 1, 2025 | 12:49 PM
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Originally Posted by jake_vette
Thanks I'll check him out. What else about A&A made you not want to go with them?
The intercooler, prochargers is bigger and offered in a vertical mount. Seems like it offers better cooling. I still can’t figure out why they would offer this kit and tell you the car can’t handle a pull to 120. Seems like that should be disclosed before you buy it.
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Old Oct 1, 2025 | 07:57 PM
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why do you care about why one guy didn’t choose a&a….It’s irrelevant. Your car has an A&A kit.

The reason why he’s telling you not do long pulls is because his own personal car blew up. Again, whether it’s procharger, ECS, A&A or LT4 supercharger it can all blow up. If you don’t know how to tune gen v’s then what do you expect to happen… guaranteed you are on stock map and don’t even have a baro breakout lol. I actually wouldn’t romp on it until you get a wideband on it and have a real tuner dial it in.

its a really easy solution. Buy HPTuners, buy an AEM (30-0300) wideband, buy a baro breakout, buy ls9 map. Use Greg Huggins on HPTuners or Internetninjas on CF to tune the car. Done.
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Old Oct 1, 2025 | 08:36 PM
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Originally Posted by Petera90
why do you care about why one guy didn’t choose a&a….It’s irrelevant. Your car has an A&A kit.

The reason why he’s telling you not do long pulls is because his own personal car blew up. Again, whether it’s procharger, ECS, A&A or LT4 supercharger it can all blow up. If you don’t know how to tune gen v’s then what do you expect to happen… guaranteed you are on stock map and don’t even have a baro breakout lol. I actually wouldn’t romp on it until you get a wideband on it and have a real tuner dial it in.

its a really easy solution. Buy HPTuners, buy an AEM (30-0300) wideband, buy a baro breakout, buy ls9 map. Use Greg Huggins on HPTuners or Internetninjas on CF to tune the car. Done.
You think A&A doesn't know how to tune a supercharged LT1?
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