OK so I took a ride in my buddy's turbo IS300 last night and it just makes me want boost even more.. His car is supposed to be making 600hp to the wheels at 28 psi when it's done being tuned, so right now he can't really get on it too hard. We drove around a bit last night and we were usually hitting around 10 psi but we hit 16-17 a couple times.

Now my question is this. If what I felt in his car was mostly 10 psi pulls, would it feel the same in a turbocharged E36 M3? Or would this all depend on the size of the turbo and setup? I absolutely LOVED how it felt and sounded waiting for the turbo to spool and then the huge kick in the back when the car started to pull. Would a TT stage 2 kit feel more or less the same way?

Step 1: Find somebody in Socal with a TT turbo kit
Step 2: Ride in car of person from step 1.
Step 3: Call Nick and order your kit.

psi doesn't mean squat unless you define what turbo is being used (i.e., you would end up calculating air flow. The amount of air is what is important).

OK so I took a ride in my buddy's turbo IS300 last night and it just makes me want boost even more.. His car is supposed to be making 600hp to the wheels at 28 psi when it's done being tuned, so right now he can't really get on it too hard. We drove around a bit last night and we were usually hitting around 10 psi but we hit 16-17 a couple times.

Now my question is this. If what I felt in his car was mostly 10 psi pulls, would it feel the same in a turbocharged E36 M3? Or would this all depend on the size of the turbo and setup? I absolutely LOVED how it felt and sounded waiting for the turbo to spool and then the huge kick in the back when the car started to pull. Would a TT stage 2 kit feel more or less the same way?
!0 psi will feel like 10 psi once it gets there. However the way that it gets there is the difference. This depends on the time it takes the turbo to spool up. 10 psi on a turbo will make a broader hp/tq curve than a s/c. This is becasue once the turbo spools up it's boost it the same throughout the rpm range. Max boost is controoled by the wastegate setting. Where a s/c makes it's full boost twords redline. There is no way to compare two totally different cars. But it is possible to get the same feel from both. You would just have to read the turbo maps and make it the two cars as close as possible. The only way to feel what a M3 with a TT stage 2 car would feel like is to take a ride in one. It can't be exactly duplicated in any other car, not even another M3, they will vary slightly.

Step 1: Find somebody in Socal with a TT turbo kit
Step 2: Ride in car of person from step 1.
Step 3: Call Nick and order your kit.


I don't think there is anyone in Socal with a TT stage 2. Only one I can think of is Jade M3 in norcal. And I also have to find an E36 M3 first as well :stickoutt


Anyways I will check tonight with my friend to see what kind of turbo he is running and report back. Hopefully that will help some.

I don't think there is anyone in Socal with a TT stage 2. Only one I can think of is Jade M3 in norcal. And I also have to find an E36 M3 first as well :stickoutt


Anyways I will check tonight with my friend to see what kind of turbo he is running and report back. Hopefully that will help some.
I am near the Oceanside area. My car probably feels similiar to the TTS2 because it spools to full boost around the same rpm(2900). I have about the same rwhp as the TTS2 although my tq is a little higher. When I get my car back I will give you a ride. Although I will have to turn down the boost for it to be like a TTS2 at that time due to some minor changes. :devillook

The IS300 probably has a lot of lag knowing how those Toyota engines are. This would not feel like the TTS2 e36 m3 but more like my Supra at very low boost I imagine. Two very different cars. The TTS2 has full boost very quickly so there is hardly any feeling at all of any lag...yet the power rush will feel more smooth than the IS300 with long lag and then the violent kick. That volent kick might seem fun at first but for a driver it's actually harder to control, especially when not going straight.

Shotgun!!!! :redspot

I am near the Oceanside area. My car probably feels similiar to the TTS2 because it spools to full boost around the same rpm(2900). I have about the same rwhp as the TTS2 although my tq is a little higher. When I get my car back I will give you a ride. Although I will have to turn down the boost for it to be like a TTS2 at that time due to some minor changes. :devillook

The IS300 probably has a lot of lag knowing how those Toyota engines are. This would not feel like the TTS2 e36 m3 but more like my Supra at very low boost I imagine. Two very different cars. The TTS2 has full boost very quickly so there is hardly any feeling at all of any lag...yet the power rush will feel more smooth than the IS300 with long lag and then the violent kick. That volent kick might seem fun at first but for a driver it's actually harder to control, especially when not going straight.


Hmm interesting. When do you plan on getting your car back? Looks like I will have to make a trip to SD... :)

Shotgun!!!! :redspot
I can give you a ride in the Supra pretty much anytime but the m3 I will have to PM you when I have it next.
Hmm interesting. When do you plan on getting your car back? Looks like I will have to make a trip to SD... :)
Well what I can do is see how long it will take for my tuner to start on my car. If it will be a few weeks, he could just install the new turbo on her and I could borrow her for a few days or so. Then I could give you a ride. My GT30R has been sold. I'll PM you after I speak with him next Thursday...I am going on vaca tomorrow and will be surfing my brains out so I won't be near a phone or computer.

I can give you a ride in the Supra pretty much anytime but the m3 I will have to PM you when I have it next.

Well what I can do is see how long it will take for my tuner to start on my car. If it will be a few weeks, he could just install the new turbo on her and I could borrow her for a few days or so. Then I could give you a ride. My GT30R has been sold. I'll PM you after I speak with him next Thursday...I am going on vaca tomorrow and will be surfing my brains out so I won't be near a phone or computer.

Awesome. Thanks so much for the help, and have fun on your vacation! :buttrock

Increasing density is the goal not PSI

OK I got more info from him. His turbo is a PT67, or precision turbo, which he said is a modified Garrett. Does this help at all? Discuss away please :)

A T67 will hit much harder than the AA Stage 2. That's the same turbo I'll be using. I wonder if his kit is form Boost Logic too. :)

A T67 will hit much harder than the AA Stage 2. That's the same turbo I'll be using. I wonder if his kit is form Boost Logic too. :)

His kit is from Toyomoto (is that how it's spelled?) How will the T67 compare to the TT stage 2?

A T67 will hit much harder than the AA Stage 2. That's the same turbo I'll be using. I wonder if his kit is form Boost Logic too. :)


I have to agree I think the T67 is a perfect match for our motors.

His kit is from Toyomoto (is that how it's spelled?) How will the T67 compare to the TT stage 2?


Its spools just as good as the T60-1 used in the TTstg2 kit.

10 psi with a Garret T3 is a world different than 10psi on a T67. They both hit the same pressure level, but the T67, being much larger, will have a lot more flow and volume of air, and will produce more power at the same boost levels as a smaller turbo because it is able to flow more air at the given boost level.

And as far as an explanation of psi, when measured in a boosted car, it is the pounds per square inch of pressure in the engine above atmospheric pressure. Atmospheric pressure being 14.7psi, when a non-turbo car is going full throttle, they are actually at 14.7psi, but since that is normal (at sea-level) then we call that zero psi, the pressure that normal air is, and base turbo/supercharger boost pressure from that point. Therefore, when you hit 10psi in your boosted car, you're actually at 24.7psi of absolute pressure.

Anyway, may have caused more confusion than good for those who are new to the concept..lol.

Nick

Shoot, I guess I will need a ride in one to be able to tell the difference.

Thanks for the explanation Nick, it helped :)

I see you have an 02' M3 and sold the 05' S4. Any reason you sold the S4 and which one do you like more? By the way, the main difference when looking to get the turbo for the //M is that it may spool around 3rpm, therefore when the turbo is finally spooled it will only be producing power for about 4-6rpm. That is basically what you use to compare the two turbos, where they spool and how much psi they are generating.

I see you have an 02' M3 and sold the 05' S4. Any reason you sold the S4 and which one do you like more? By the way, the main difference when looking to get the turbo for the //M is that it may spool around 3rpm, therefore when the turbo is finally spooled it will only be producing power for about 4-6rpm. That is basically what you use to compare the two turbos, where they spool and how much psi they are generating.

I sold the S4 because I didn't drive it enough. Honestly I liked the S4 more than the M3. I only still have the M3 because it is a lemon and I am still in the process of lemoning it.

I see, what did you like more about the S4?

I see, what did you like more about the S4?

Just about everything. The only thing I felt was better about the M3 was how raw/racey and exciting it felt. And I also believe the M3 looks better outside. But interior wise the Audi is light years ahead. The steering feel I got from the Audi felt better, the controls were better laid out, the ehxaust sounded much better, etc. Not much wrong with the S4 except the gas mileage :stickoutt

I thought T67 spools up later vs the 60-1.

Kenny, good to see you're back here... when I get my car done, we can meet up and I'll give you a ride and see what you think.

Alright, well I also like the exterior look of the M3 better. I can imagine the V8 would eat up a good amount of gas.

All that being said, it still come down to the characteristics of the different compressor maps.

I thought T67 spools up later vs the 60-1.

Kenny, good to see you're back here... when I get my car done, we can meet up and I'll give you a ride and see what you think.

Hey Jon how have you been? What do you have up your sleeves for your car now? Will you ever be done with it? :stickoutt

The PT67 turbo he has probably has a modified exhaust housing and wheel from Garrett. That turbo is really an awesome turbo for street use, one of the best I think, and it would definately be really good on an M3 motor.

I took a ride in Jaded M3's TT stage 2 M3. It was FAST! guc32 was there too, he has a turbo E36 also, but the kit is somewhat custom. He has a T67 on his car. They both agreed that the T3/T4 60-1 spools faster, but the T67 will outrun it up top.