🔧 BUILD My MKIV Supra build-ish thread...big boy 3.4L motor time

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Most of you that have access to FB have probably already seen this but I did part ways with my Turbo TA yesterday. I've owned that car for over 10 years and took it from completely stock to a monster that is easy to drive and fun to thrash. I will miss that car but where I am in my life is I'd like to slow it down a bit and just have some cruisers and the TA deserves better than what I'm will to do with it. I think it's got everything to be competitive in the right hands. The new owner is a good friend of mine and lives less than a mile away from me so we will be seeing each others cars often that's for sure so it's not gone gone. This was not an easy decision but a combination of right place, right time, right person and right price as I had to come up with some cash on the difference. I would never sell this car normally as I don't think I could trust someone to not hurt themselves in it, but the new owner is more than capable of handling it and I'll be able to still see it perform at the track albeit from the sidelines and not in the drivers seat.

Edit: I'm going to turn this into a mini build thread and document some progress

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willizm

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superb. How often do you anticipate driving on kill mode? i have a 700hp car and its hard to go wot cause it feels so fast
Honestly probably very little on full kill mode. Even on the old setup I was on 550whp for 99% of the time I drove the car. I'd only push it up to full 700whp when I was doing a pull and that was very infrequent. I'd rather have the car live than beat the piss out of it and make it destroy itself.
 

Mook

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Honestly probably very little on full kill mode. Even on the old setup I was on 550whp for 99% of the time I drove the car. I'd only push it up to full 700whp when I was doing a pull and that was very infrequent. I'd rather have the car live than beat the piss out of it and make it destroy itself.
team america vomit GIF
 

Shawn1112

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Honestly probably very little on full kill mode. Even on the old setup I was on 550whp for 99% of the time I drove the car. I'd only push it up to full 700whp when I was doing a pull and that was very infrequent. I'd rather have the car live than beat the piss out of it and make it destroy itself.
I get that part, but with that said. Why did you decide to build it for XXXXwhp if your only going to use it 1% of the time?
I'm not knocking you bro in the least bit, its your hard earned money and spend it as you please. Also I'm really enjoying this build, but I'm just curious why. Does it increase the re-sale value, or is it just to say I have XXXXwhp, FAFO chump lol.

Every build of mine (I know not even close to apples to apples) that had a power adder and or built motor. I'm using that power every chance I get and I will push it to the limits within reason.
 

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I get that part, but with that said. Why did you decide to build it for XXXXwhp if your only going to use it 1% of the time?
I'm not knocking you bro in the least bit, its your hard earned money and spend it as you please. Also I'm really enjoying this build, but I'm just curious why. Does it increase the re-sale value, or is it just to say I have XXXXwhp, FAFO chump lol.

Every build of mine (I know not even close to apples to apples) that had a power adder and or built motor. I'm using that power every chance I get and I will push it to the limits within reason.
This is why my shit breaks i roll around on nothing less than 1k lol
 

willizm

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I get that part, but with that said. Why did you decide to build it for XXXXwhp if your only going to use it 1% of the time?
I'm not knocking you bro in the least bit, its your hard earned money and spend it as you please. Also I'm really enjoying this build, but I'm just curious why. Does it increase the re-sale value, or is it just to say I have XXXXwhp, FAFO chump lol.

Every build of mine (I know not even close to apples to apples) that had a power adder and or built motor. I'm using that power every chance I get and I will push it to the limits within reason.
I drive my car all the time. If it was a weekend only kind of thing then I would have a different take on it. I literally drove it from Chicago to Houston in a day so this car will be driven no differently.
 

willizm

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This is why my shit breaks i roll around on nothing less than 1k lol
I was the opposite with my TA. Part of the reason why that setup worked so well was I would only roll around on 12psi and wouldn't flog it repeatedly. Just a rip now and then but enough time between pulls to let it cool down. I had that motor for a good 4-5 years before I had it refreshed and even then the machine shop said it looked great. When I was at the track though I had no fear of breaking and would push it as hard as I could. I was so confident with the car that in the final years of owning it I would just drive it to the track. Run a low 9 with a 1.2 60' and then drive it back home.
 

BOTTLEFED

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I was the opposite with my TA. Part of the reason why that setup worked so well was I would only roll around on 12psi and wouldn't flog it repeatedly. Just a rip now and then but enough time between pulls to let it cool down. I had that motor for a good 4-5 years before I had it refreshed and even then the machine shop said it looked great. When I was at the track though I had no fear of breaking and would push it as hard as I could. I was so confident with the car that in the final years of owning it I would just drive it to the track. Run a low 9 with a 1.2 60' and then drive it back home.
Yeah, that's a good thing. i unfortunately did not have any type of boost control with the blower so it's all on all the time lol. I Do the same kind of shit make a rip and chill, sometimes a hard highway pull if needed lol. Def nice to drive to the track and rip a 9 and drive home. I doubt I would ever drive to the track, not that I couldn't but just the "piece of mind" knowing I have a trailer to get my pile home. Car is def bad ass I wanna see some 1300hp pulls :cool:
 

willizm

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Yeah, that's a good thing. i unfortunately did not have any type of boost control with the blower so it's all on all the time lol. I Do the same kind of shit make a rip and chill, sometimes a hard highway pull if needed lol. Def nice to drive to the track and rip a 9 and drive home. I doubt I would ever drive to the track, not that I couldn't but just the "piece of mind" knowing I have a trailer to get my pile home. Car is def bad ass I wanna see some 1300hp pulls :cool:
Oh for sure, I liked having access to a trailer just to ease my mind if I’m concerned about breaking. I’ve towed other people home and drove my car back a few times
 
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Pressure Ratio

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Being able to run less power is very helpful in an RWD car that makes 1200+hp and 1000+ft/lbs of torque at the tire. Especially on dusty or cold roads where ridiculous power is just going to make things worse. If not unsafe. As well as not being harder on parts in the motor.

But with a turbo car and the newer stand-alone ECUs out, you can run a moderate power tune, change boost settings on the fly, or run a scramble button should you want the option to jump up the power instantly. Some of them even allow you to change the tune on the fly. As far as flexibility goes, a turbo car with a standalone ECU to control boost and maps, you can't get any better.

on the street, the Carpri with the big power tune could haze the drag radials at 40, 60, or 80 mph. Especially in fall with the streets cooling off. It didn't make 1000 ft/lbs of torque either. But it was no quicker than the car was with a 1/3rd less power as it would hook on that lower power. And had less potential for scary moments haha
 
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willizm

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Being able to run less power is very helpful in an RWD car that makes 1200+hp and 1000+ft/lbs of torque at the tire. Especially on dusty or cold roads where ridiculous power is just going to make things worse. If not unsafe. As well as not being harder on parts in the motor.

But with a turbo car and the newer stand-alone ECUs out, you can run a moderate power tune, change boost settings on the fly, or run a scramble button should you want the option to jump up the power instantly. Some of them even allow you to change the tune on the fly. As far as flexibility goes, a turbo car with a standalone ECU to control boost and maps, you can't get any better.

on the street, the Carpri with the big power tune could haze the drag radials at 40, 60, or 80 mph. Especially in fall with the streets cooling off. It didn't make 1000 ft/lbs of torque either. But it was no quicker than the car was with a 1/3rd less power as it would hook on that lower power. And had less potential for scary moments haha
I have a BTI gauge and it is canbus enabled so with the motec m150 I can control the boost and traction among other things from the gauge directly. No need for additional switches and such.

 
So we decided to stop at 35psi. We pushed 38 but the car wasn’t making any more power. We are hitting the limits of the intake manifold or turbo. Motor and fuel system are good for 1600whp so we have the headroom if I feel I need more but for now the pt7675 spools up nicely, has a great fat powerband and the engine is not working hard to make 1100whp with 35psi and 15* of timing. I may go slightly larger turbo but it will be at a sacrifice of midrange power and response.

Car drives great btw, the response is very similar to my old 3.0/pt6765 but on spring pressure alone it makes a little more than my old setup at max boost.

Ac works great and the engine temps were very good in stop and go traffic. Not bad for a street car. The sounds this car makes is sooo different than my old setup. The little extra displacement and compression is nice for low rpm cruising. I don’t feel like I’m lugging the engine as much under 2k rpm.

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willizm

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That should be about the limit of that turbo I think, but it is such a great road friendly turbo with the way it spools and the power it makes, enjoy! Car is awesome!!
Yeah for sure, I was hesitant on going with an pt8685 or similar size as it would make the power but be a dog for 95% of the time I’d drive it. This is a good cross between making good power but a responsive ripper on the street
 

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