Need help with future mods

[OneTimeAccount]

I'd agree with everything above about suspension. The car already has a ton of power, beyond most of our abilities, and being able to control it better or more precisely with suspension upgrades is a great place to start.

Other important things to consider if you're looking to do road course tracking is fuel starvation and oil starvation (is oil starvation the correct term?).

Regardless, fuel modifications to ensure fuel is always being supplied evenly in hard cornering and the same concept for oil circulation is extremely important. Just met someone today that blew their motor on the track due to fuel starvation.

Yikes.

Can you elaborate how it was fuel starvation that caused the engine to blow? Oil I can understand, one mishap there and the engine will be toast.

I’m running into fuel starvation now, happened twice. All it does is go into limp mode and cut power for safety reasons. Jackie Ding was the one who told me it’s why my car went into limp, especially after a right hand turn. I have to keep the tank above half.

He has a surge tank solution but it costs around $2k for the set up.

Does going squared provide more grip? If so, what tires would you recommend. I was going to look into some ps4s.

It creates a more balanced and neutral car with great grip. If you’re serious about tracking, a good 200tw tire will give you good lap times. PS4S’s are good street tires but there’s better for the track, just depends on your goal.

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[Deighvid]

Yikes.

Can you elaborate how it was fuel starvation that caused the engine to blow? Oil I can understand, one mishap there and the engine will be toast.

I’m running into fuel starvation now, happened twice. All it does is go into limp mode and cut power for safety reasons. Jackie Ding was the one who told me it’s why my car went into limp, especially after a right hand turn. I have to keep the tank above half.

He has a surge tank solution but it costs around $2k for the set up.

Yup! Jackie Ding has a great video about a solution. There's also a baffled insert for the fuel tank that is supposed to help sloshing, same how baffled oil pans work.

From the conversation I had with the guy and the blown motor: they're relatively well known and I don't think it's public information so I'll try to just give the bullet points. Essentially what he said is that when they dissected the crack in the block, it occurred when fuel sloshed and air was sucked up and pushed through the lines. We didn't get into much more detail than that, but he did mention the fuel tank mat solution and that they should have implemented it but didn't get around to it and paid the price. (to paraphrase)

 

[OneTimeAccount]

Yup! Jackie Ding has a great video about a solution. There's also a baffled insert for the fuel tank that is supposed to help sloshing, same how baffled oil pans work.

From the conversation I had with the guy and the blown motor: they're relatively well known and I don't think it's public information so I'll try to just give the bullet points. Essentially what he said is that when they dissected the crack in the block, it occurred when fuel sloshed and air was sucked up and pushed through the lines. We didn't get into much more detail than that, but he did mention the fuel tank mat solution and that they should have implemented it but didn't get around to it and paid the price. (to paraphrase)

Now I’m worried... I don’t want a blown motor, especially since I track my car a lot, and push it hard (hence why it’s starved a couple times already).

Do you happen to have a link to the product to help compact the fuel slosh?

 

[Deighvid]

Now I’m worried... I don’t want a blown motor, especially since I track my car a lot, and push it hard (hence why it’s starved a couple times already).

Do you happen to have a link to the product to help compact the fuel slosh?

I THINK that this may be what they were referencing in our conversation https://www.holley.com/products/fuel_systems/hydramat/

But you should definitely do some more research on it. I haven't looked into it in detail because I'm not ready to go the track route tbh. I'd definitely look into Jackie Ding's video with the surge tank solution as well and consult a trusted performance shop near you for guidance

 

[OneTimeAccount]

I THINK that this may be what they were referencing in our conversation https://www.holley.com/products/fuel_systems/hydramat/

But you should definitely do some more research on it. I haven't looked into it in detail because I'm not ready to go the track route tbh. I'd definitely look into Jackie Ding's video with the surge tank solution as well and consult a trusted performance shop near you for guidance

That hydramat thing looks crazy, almost a too good to be true solution lol.

Jackie showed me first hand what his solution was when I met him at GingerMan raceway a couple weeks ago. Pretty darn cool system but expensive for me at the moment. I will have to figure out something though. Thanks for the link!

 

[NewGuy]

Man, this post has given me a lot to think about. Like @OneTimeAccount , I am now worried about blowing my engine due to fuel starvation.

I'm not worried about warranty since I knew that was going out the door as soon as I started modifying my car. Lol like my friend said, if it breaks fix it. If it breaks again, fix it better.

Well, hopefully I don't really have that issue right away. I'd like to enjoy a couple track days before breaking the car.

 

[Akellys]

I agree with the previous opinions on focusing on suspension before adding power. I've had my Supra on several road track days and a few autoX events. If you're looking at road courses, I suggest doing your brake pads before anything else. The car handles pretty well stock, but if you're hitting high speeds on a road course, you will definitely notice brake fade on stock pads. It's not the end of the world but if I were to rewind all of my upgrades, I would start with pads and tires. I had ps4s on a 440 BMW, and while they are a great street tire, they won't last long on road courses. For the original super stock tires, I would say within 6-8 road course days, you'll need to replace at least some of the tires. After 4 track days and one autoX event, I had already worn a bald spot into the edge of one tire from rolling it over. I jumped to a set of 200 treadwear Hankook Rs4's and they look like they are wearing much better on the track. Not great in the cold or rain, but pretty nice on the track once you get pressures right and some heat into them. I suggest low 30's PSI when they are hot.

If you haven't been to the track in your car already, just go..... It's way more than capable from the factory and I suggest getting a feel for it and make decisions from there. The best improvements you can make to benefit your lap times is going to be practice and time behind the wheel.

Do you have much for track experience already?

 

[NewGuy]

I agree with the previous opinions on focusing on suspension before adding power. I've had my Supra on several road track days and a few autoX events. If you're looking at road courses, I suggest doing your brake pads before anything else. The car handles pretty well stock, but if you're hitting high speeds on a road course, you will definitely notice brake fade on stock pads. It's not the end of the world but if I were to rewind all of my upgrades, I would start with pads and tires. I had ps4s on a 440 BMW, and while they are a great street tire, they won't last long on road courses. For the original super stock tires, I would say within 6-8 road course days, you'll need to replace at least some of the tires. After 4 track days and one autoX event, I had already worn a bald spot into the edge of one tire from rolling it over. I jumped to a set of 200 treadwear Hankook Rs4's and they look like they are wearing much better on the track. Not great in the cold or rain, but pretty nice on the track once you get pressures right and some heat into them. I suggest low 30's PSI when they are hot.

If you haven't been to the track in your car already, just go..... It's way more than capable from the factory and I suggest getting a feel for it and make decisions from there. The best improvements you can make to benefit your lap times is going to be practice and time behind the wheel.

Do you have much for track experience already?

I appreciate the above tips. I have zero track experience. I'm trying to find one nearby that I can go to. But I don't have a truck or trailer. I'm paranoid that I'll break the car at the track and be stuck there lol

 

[Akellys]

I appreciate the above tips. I have zero track experience. I'm trying to find one nearby that I can go to. But I don't have a truck or trailer. I'm paranoid that I'll break the car at the track and be stuck there lol

Motorsports.reg is a great place to start looking for local tracks. There are other options for tracks that aren't affiliated with them, but that's probably where I would start. I'm in Canada, so I probably can't help finding a track for you.

As far as being worried about breaking your car, try and get it out of your head. Honestly, I think every mod you do is going to end up making the car less and less reliable for now. Once you start pushing things really hard, then that may change, but the Supra is a very capable car on the track to learn with. Power will be the last thing you want to add.

If you're hesitant about jumping onto a road course, try autocross. Much less demanding on your car, much cheaper and it's a really safe way to learn car control. It's a really great way to ease into motorsports and you will learn a ton. Road course stuff can be a bit chaotic and intimidating your first few times. Do some research on what's available for both of them, and also look into instructors. Not do bash your driving skills, but if you're just getting into tracking your car, there is a lot to learn. Professional instructors will really make a big difference in your performance and help make the learning curve a bit less intimidating. One event that I have frequented, offers instructors at $100 for the day. Performance and skill wise, it's probably the best money you could spend at this point. Ridealongs are usually permitted, so finding a skilled driver to jump in your car with you can teach you a lot. Quite often, you can have them drive your car with you in it. Buyer beware on that one though. Your insurance is void the second you drive on the track. If you find someone you trust, the capabilities of your car in the hands of a skilled racer will probably blow your mind. I've had it happen to me a few times.

If your goal is to go out and track your car.... Forget about all the mods for now. Just go and track the car. The MKV Supra is a pretty badass ride. Just go and enjoy it, get a feel for the car, learn how to drive consistent and precise lines. Then worry about driving those lines fast, and then worry about making changes to the car. I drive 300KM each way to my closest track with no trailer ?

One saying I hear all the time at the track is: "The best modification you can do to any car, is to adjust the nut behind the steering wheel."

 

[NewGuy]

Motorsports.reg is a great place to start looking for local tracks. There are other options for tracks that aren't affiliated with them, but that's probably where I would start. I'm in Canada, so I probably can't help finding a track for you.

As far as being worried about breaking your car, try and get it out of your head. Honestly, I think every mod you do is going to end up making the car less and less reliable for now. Once you start pushing things really hard, then that may change, but the Supra is a very capable car on the track to learn with. Power will be the last thing you want to add.

If you're hesitant about jumping onto a road course, try autocross. Much less demanding on your car, much cheaper and it's a really safe way to learn car control. It's a really great way to ease into motorsports and you will learn a ton. Road course stuff can be a bit chaotic and intimidating your first few times. Do some research on what's available for both of them, and also look into instructors. Not do bash your driving skills, but if you're just getting into tracking your car, there is a lot to learn. Professional instructors will really make a big difference in your performance and help make the learning curve a bit less intimidating. One event that I have frequented, offers instructors at $100 for the day. Performance and skill wise, it's probably the best money you could spend at this point. Ridealongs are usually permitted, so finding a skilled driver to jump in your car with you can teach you a lot. Quite often, you can have them drive your car with you in it. Buyer beware on that one though. Your insurance is void the second you drive on the track. If you find someone you trust, the capabilities of your car in the hands of a skilled racer will probably blow your mind. I've had it happen to me a few times.

If your goal is to go out and track your car.... Forget about all the mods for now. Just go and track the car. The MKV Supra is a pretty badass ride. Just go and enjoy it, get a feel for the car, learn how to drive consistent and precise lines. Then worry about driving those lines fast, and then worry about making changes to the car. I drive 300KM each way to my closest track with no trailer ?

One saying I hear all the time at the track is: "The best modification you can do to any car, is to adjust the nut behind the steering wheel."

i hope I get a chance to take it to a track. The car is at the dealership right now. I’m told cylinder 1 is misfiring. I’m hoping it’s an easy fix and car is good to go and not a defective engine.

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