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Megamarines · 06-18-2021, 12:05 AM

Anyone experience near overheating on this kit?

I’ve had it on since November, and started running E85 somewhere in April; makes close to 700whp or more now. I had a run against a new GT500 and beat it uphill, but by the end of the run I was one dot away from overheating and was having a decent amount of white smoke coming out of my hood vents. The run maybe lasted forty-five seconds at full WOT. Car eventually cooled down but I almost thought I had something on fire until I noticed it was just whitish-grey smoke that eventually stopped. When I finally pulled over there was no spilled coolant, car went back to normal, and car has felt fine since.

Did I experience head lift or something? I cant even begin to figure it out; I have no idea if overheating caused the white smoke or what. My knock sensors are on, all safety parameters are set, but car is basically at maximum send with the E85 power tune.

Weirdest part? Car drives fine. It’s had numerous hard pulls and has been pushed a bit. No running or idling issues at all.

Spooler · 06-18-2021, 09:08 AM

Quote:

Originally Posted by Megamarines

Anyone experience near overheating on this kit?

I’ve had it on since November, and started running E85 somewhere in April; makes close to 700whp or more now. I had a run against a new GT500 and beat it uphill, but by the end of the run I was one dot away from overheating and was having a decent amount of white smoke coming out of my hood vents. The run maybe lasted forty-five seconds at full WOT. Car eventually cooled down but I almost thought I had something on fire until I noticed it was just whitish-grey smoke that eventually stopped. When I finally pulled over there was no spilled coolant, car went back to normal, and car has felt fine since.

Did I experience head lift or something? I cant even begin to figure it out; I have no idea if overheating caused the white smoke or what. My knock sensors are on, all safety parameters are set, but car is basically at maximum send with the E85 power tune.

Weirdest part? Car drives fine. It’s had numerous hard pulls and has been pushed a bit. No running or idling issues at all.

Sounds like you lifted the heads. You have a headgasket that is leaking but it is not real bad yet.

TopgunZ · 06-18-2021, 01:00 PM

Quote:

Originally Posted by Megamarines

Anyone experience near overheating on this kit?

I’ve had it on since November, and started running E85 somewhere in April; makes close to 700whp or more now. I had a run against a new GT500 and beat it uphill, but by the end of the run I was one dot away from overheating and was having a decent amount of white smoke coming out of my hood vents. The run maybe lasted forty-five seconds at full WOT. Car eventually cooled down but I almost thought I had something on fire until I noticed it was just whitish-grey smoke that eventually stopped. When I finally pulled over there was no spilled coolant, car went back to normal, and car has felt fine since.

Did I experience head lift or something? I cant even begin to figure it out; I have no idea if overheating caused the white smoke or what. My knock sensors are on, all safety parameters are set, but car is basically at maximum send with the E85 power tune.

Weirdest part? Car drives fine. It’s had numerous hard pulls and has been pushed a bit. No running or idling issues at all.

What PSI are you making?

redondoaveb · 06-18-2021, 02:04 PM

Quote:

Originally Posted by TopgunZ

What PSI are you making?

He mentioned 18 on Facebook, definitely over the threshold

TopgunZ · 06-19-2021, 07:34 PM

Quote:

Originally Posted by redondoaveb

He mentioned 18 on Facebook, definitely over the threshold

If this is definitely over it, what's the threshold?

Weren't you over 17 for years?

Your sig states 19.5 and I don't believe that was built.

Just trying to normalize the data.

redondoaveb · 06-19-2021, 08:15 PM

Quote:

Originally Posted by TopgunZ

If this is definitely over it, what's the threshold?

Weren't you over 17 for years?

Your sig states 19.5 and I don't believe that was built.

Just trying to normalize the data.

I was told getting above 16 psi is getting into the danger zone. Of course there's no magic number. I think a lot has to do with how often you're in that zone. I was making 17 for a couple years but I don't put a lot of miles on my car and I wasn't at peak boost that often. Since I haven't torn apart my blown motor yet, I'm not sure what caused the bottom end failure but I'm pretty sure it would have lifted the heads if the bottom end didn't fail.

What psi was your rotrex build making when it lifted the heads?

TopgunZ · 06-19-2021, 08:20 PM

Quote:

Originally Posted by redondoaveb

I was told getting above 16 psi is getting into the danger zone. Of course there's no magic number. I think a lot has to do with how often you're in that zone. I was making 17 for a couple years but I don't put a lot of miles on my car and I wasn't at peak boost that often. Since I haven't torn apart my blown motor yet, I'm not sure what caused the bottom end failure but I'm pretty sure it would have lifted the heads if the bottom end didn't fail.

What psi was your rotrex build making when it lifted the heads?

22.5psi

There's lots of guys running 16 psi or more. Do the heads lift over time? I wouldn't think so. I'd imagine it's discrete.

redondoaveb · 06-19-2021, 10:24 PM

Quote:

Originally Posted by TopgunZ

22.5psi

There's lots of guys running 16 psi or more. Do the heads lift over time? I wouldn't think so. I'd imagine it's discrete.

The head lift issue is over my pay grade. I don't know if the heads can lift over time or not. I do know that head gaskets can fail over time. Did the heads lift on your first dyno run at 22.5 psi? I was just told when you get over 16 psi, it starts to be an area of concern for head lift.

Spooler · 06-20-2021, 12:30 PM

Quote:

Originally Posted by TopgunZ

22.5psi

There's lots of guys running 16 psi or more. Do the heads lift over time? I wouldn't think so. I'd imagine it's discrete.

Read and watch all of the video's in my thread. It will take 2 weeks or so. Lots of information in there.

DrBacon · 06-20-2021, 01:16 PM

Quote:

Originally Posted by Megamarines

The run maybe lasted forty-five seconds at full WOT.

Were you going 500mph? How do you do WOT for 45+ seconds?!

06-18-2021, 12:05 AM	#1 (permalink)
Megamarines Base Member Join Date: Apr 2019 Location: San Ramon, CA Posts: 30 Drives: 2019 Nismo 370Z Rep Power: 3363	Anyone experience near overheating on this kit? I’ve had it on since November, and started running E85 somewhere in April; makes close to 700whp or more now. I had a run against a new GT500 and beat it uphill, but by the end of the run I was one dot away from overheating and was having a decent amount of white smoke coming out of my hood vents. The run maybe lasted forty-five seconds at full WOT. Car eventually cooled down but I almost thought I had something on fire until I noticed it was just whitish-grey smoke that eventually stopped. When I finally pulled over there was no spilled coolant, car went back to normal, and car has felt fine since. Did I experience head lift or something? I cant even begin to figure it out; I have no idea if overheating caused the white smoke or what. My knock sensors are on, all safety parameters are set, but car is basically at maximum send with the E85 power tune. Weirdest part? Car drives fine. It’s had numerous hard pulls and has been pushed a bit. No running or idling issues at all. Last edited by Megamarines; 06-18-2021 at 12:30 AM.

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