Fast Intentions Stage 2 TT build by MA-Motorsports.

madwi · 07-21-2020, 03:14 PM

Quote:

Originally Posted by Spooler

That is why I am leaning toward the suspension setup. it's free, may go with Phunks idea and raise the rear. I will have better traction and an even car at WOT.

Spooler · 07-21-2020, 03:18 PM

Quote:

Originally Posted by madwi

LOL, that is Rusty's style.

Elmo370z · 07-21-2020, 03:38 PM

Quote:

Originally Posted by Hotrodz

I have never had issues with lift even at 160 and stock setup. Well the stock undertray came unbuttoned that is. Anyway, the only thing was that I was lower on Teng lowering springs. I have seen CFD rendering and the Nismo aero stops working at about 90 to 100mph and you start getting lift from that point. Lowering the car 1" significantly decreases drag and lift but it will still be a factor without a front splitter and removing area of high pressure. The hood vents remove the highest area of high pressure, the next place is the fenders. There is a reason all racecars have a way to remove high pressure from the wheel wells.

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A front splitter would cause drag. Front diffuser to create an area of low pressure. Reduce the opening to the radiator and IC to slow the air down and make it more efficient. Reason why all these big power 1/2 mile guys basically have the front end boxes off

Spooler · 07-21-2020, 03:51 PM

Whatever I do will not be noticeable. I will still look like stock. I don't need any unwanted attention.

Hotrodz · 07-21-2020, 04:26 PM

Quote:

Originally Posted by Elmo370z

A front splitter would cause drag. Front diffuser to create an area of low pressure. Reduce the opening to the radiator and IC to slow the air down and make it more efficient. Reason why all these big power 1/2 mile guys basically have the front end boxes off

It is all about what you want to accomplish. The air box is mostly about cooling efficiency. They will have a smaller opening than OEM. They will have short splitter and lowered in the front quite a bit to decrease drag. They will have undertray or a flat floor that also reduces drag due to less turbulence under the front of the car.

In road racing you are looking for mechanical grip and downforce to keep the car planted, there is a trade off on drag a top end. Straight line you want to reduce drag while optimizing mechanical grip, but you need enough downforce to keep the car planted.

Straight line is for fast cars, circuit racing is for fast drivers. To each their own, you know what I prefer!

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Spooler · 07-21-2020, 05:27 PM

Quote:

Originally Posted by Hotrodz

I have never had issues with lift even at 160 and stock setup. Well the stock undertray came unbuttoned that is. Anyway, the only thing was that I was lower on Teng lowering springs. I have seen CFD rendering and the Nismo aero stops working at about 90 to 100mph and you start getting lift from that point. Lowering the car 1" significantly decreases drag and lift but it will still be a factor without a front splitter and removing area of high pressure. The hood vents remove the highest area of high pressure, the next place is the fenders. There is a reason all racecars have a way to remove high pressure from the wheel wells.

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Another thing is I may have caused my own problems via adding brake ducts, Zspeed undertray, air direction panels that were removed due to TT install, and Tracspec vents. It may be due the increase in TQ causing more weight transfer. I don't know and that is what I am trying to figure out.

Spooler · 07-21-2020, 05:36 PM

I will give you an example of my experience. When I lost the first rectangular panel on the under tray that covers the 3 plastic rivets I could tell on the interstate that something was wrong and it definitely affected the aero.

Rusty · 07-21-2020, 06:51 PM

Quote:

Originally Posted by Spooler

LOL, that is Rusty's style.

Was. That's pretty close to my Dart. I had it tubbed and rear fenders trimmed back.

Elmo370z · 07-21-2020, 10:13 PM

Quote:

Originally Posted by Hotrodz

It is all about what you want to accomplish. The air box is mostly about cooling efficiency. They will have a smaller opening than OEM. They will have short splitter and lowered in the front quite a bit to decrease drag. They will have undertray or a flat floor that also reduces drag due to less turbulence under the front of the car.

In road racing you are looking for mechanical grip and downforce to keep the car planted, there is a trade off on drag a top end. Straight line you want to reduce drag while optimizing mechanical grip, but you need enough downforce to keep the car planted.

Straight line is for fast cars, circuit racing is for fast drivers. To each their own, you know what I prefer!

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Yup I agree. Spooler isn’t in it to track the car around corners.

Spooler · 07-21-2020, 10:33 PM

Quote:

Originally Posted by Elmo370z

Yup I agree. Spooler isn’t in it to track the car around corners.

I want to do whatever it is I want to at that time. A full time track only car is not one of the things I want. I can track the car if I want, I just want to have fun. If I want to come down to Sebring and run, I want to be able to do that. Tail of the Dragon, no problem. Half mile event, I am good. I may not be the fastest and I am good with that. I just want to enjoy life. Everybody else can fight over the scraps, bragging rights, whatever it is they do. Leave me out of it.

GeauxTigers1 · 07-22-2020, 02:03 AM

Quote:

Originally Posted by Spooler

The OEM VLSD takes different stub axles than the OS Giken. When it was installed, if they just swapped them over, that is the problem. One needs to be changed.

Quote:

Originally Posted by Rusty

Here's a pic of the stub axles. The one in the middle gets replaced with the one on the right.

Dude this is it!! I’m fairly certain that didn’t get swapped out. Will relay this information, thank you!

Hotrodz · 07-22-2020, 02:49 PM

Quote:

Originally Posted by Elmo370z

Yup I agree. Spooler isn’t in it to track the car around corners.

LOL, I know what the Spooler man is up to as we talk this stuff offline quite a bit. I warned him about leaving his wheel well off!

All I am doing is just providing information that will help others regardless of what they do and to be clear about what may help or hurt in achieving whatever outcome you are seeking.

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Spooler · 07-22-2020, 04:55 PM

Quote:

Originally Posted by Hotrodz

LOL, I know what the Spooler man is up to as we talk this stuff offline quite a bit.
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LOL, Spooler is hurtin right now with a bad left knee.

JARblue · 07-22-2020, 04:59 PM

Quote:

Originally Posted by Hotrodz

I warned him about leaving his wheel well off!

I removed my fender liners and just put some speed holes in my front fenders with a pick axe

Hotrodz · 07-22-2020, 05:01 PM

Quote:

Originally Posted by Spooler

LOL, Spooler is hurtin right now with a bad left knee.

Sorry to hear brother!

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07-21-2020, 03:51 PM	#2524 (permalink)
Spooler A True Z Fanatic Join Date: Jun 2014 Location: Ga Posts: 13,800 Drives: 2013 Nismo 370z Rep Power: 2684392	Whatever I do will not be noticeable. I will still look like stock. I don't need any unwanted attention. FL 4Motion and sx moneypit like this.

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07-21-2020, 05:36 PM	#2527 (permalink)
Spooler A True Z Fanatic Join Date: Jun 2014 Location: Ga Posts: 13,800 Drives: 2013 Nismo 370z Rep Power: 2684392	I will give you an example of my experience. When I lost the first rectangular panel on the under tray that covers the 3 plastic rivets I could tell on the interstate that something was wrong and it definitely affected the aero.