Fast Intentions Stage 2 TT build by MA-Motorsports.

Spooler · 06-20-2023, 11:53 AM

Don't be expecting big numbers out of my car. I want to drive it and enjoy it for a while. So if you are expecting me to push it on the dyno I am not going to do that. This build has been about efficiency and reliability. I can always turn it up later at an event. I won't get a solid tune on the dyno at that level anyway so why push it.

Rusty · 06-20-2023, 12:59 PM

Quote:

Originally Posted by Spooler

Don't be expecting big numbers out of my car. I want to drive it and enjoy it for a while. So if you are expecting me to push it on the dyno I am not going to do that. This build has been about efficiency and reliability. I can always turn it up later at an event. I won't get a solid tune on the dyno at that level anyway so why push it.

LMFAO..........1128 and it's not a finished tune.

Spooler · 06-20-2023, 11:31 PM

I grew up driving these. I like this guy at Z Car Garage. LOL

Averying · 06-21-2023, 07:28 AM

Quote:

Originally Posted by Spooler

I grew up driving these. I like this guy at Z Car Garage. LOL

Rob at Z car garage is the MAN. Always enjoy the videos that he is in.

Sent from my iPhone using Tapatalk

Spooler · 06-23-2023, 04:22 PM

We all know Shewantsthezee had a problem and fingers were pointed as to why. They were actually just a guess. Without monitoring EMAP and EGT's per cylinder you won't know what the actual cause of the failure was. If you have a EMAP sensor at the turbo you will be able to calculate when the turbine wheel is done and pressure starts to back up. What you won't know is if the actual turbo manifolds or exhaust manifolds are causing the problem. By monitoring EGT's it will tell you when you have a restriction in the exhaust manifolds. The EMAP sensor may or may not catch this issue.

Spooler · 06-23-2023, 04:34 PM

What is Drive pressure. Drive pressure is how much energy it takes to push the turbine wheel of the turbo. How do you measure it. You can calculate the Drive Pressure ratio by the following. EMAP/MAP. The ideal pressure for a drag engine is a 1:1 ratio but for a street car this is not very fun to drive. So where is an acceptable level. On a street car, that is normally no greater than a 1.5 to 1 ratio. So, my car last time it was tuned, the max boost was at 29psi. My car stopped making power at that level so I know the Drive Pressure ratio was at least 2 to 1. 58psi at the EMAP and 29 PSI in the intake manifold. So I had 58psi of pressure from the turbine wheel of the turbo all the way back to the cylinder head. Well, that's a big problem. That's like trying to cram 58psi of boost down the intake. The VQ won't handle it and it torches the headgasket. My head bolts were still torqued to the proper TQ. That means they did not stretch under high boost but I did get #4's fire ring. So, if you are monitoring EMAP, keep the boost no greater than a 1.5 to 1 ratio and the engine will be happy as long as your headgaskets and headbolts can handle the cylinder pressure.

DaveZ03 · 06-26-2023, 09:57 AM

Quote:

Originally Posted by Spooler

What is Drive pressure. Drive pressure is how much energy it takes to push the turbine wheel of the turbo. How do you measure it. You can calculate the Drive Pressure ratio by the following. EMAP/MAP. The ideal pressure for a drag engine is a 1:1 ratio but for a street car this is not very fun to drive. So where is an acceptable level. On a street car, that is normally no greater than a 1.5 to 1 ratio. So, my car last time it was tuned, the max boost was at 29psi. My car stopped making power at that level so I know the Drive Pressure ratio was at least 2 to 1. 58psi at the EMAP and 29 PSI in the intake manifold. So I had 58psi of pressure from the turbine wheel of the turbo all the way back to the cylinder head. Well, that's a big problem. That's like trying to cram 58psi of boost down the intake. The VQ won't handle it and it torches the headgasket. My head bolts were still torqued to the proper TQ. That means they did not stretch under high boost but I did get #4's fire ring. So, if you are monitoring EMAP, keep the boost no greater than a 1.5 to 1 ratio and the engine will be happy as long as your headgaskets and headbolts can handle the cylinder pressure.

This is good info. I know I have questioned you in the past on being transparent, and I respect the choices you have made given how much you have invested in time and money, but this information is greatly appreciated. Particularly as it relates to the heads. Thank you.

06-23-2023, 04:22 PM	#5 (permalink)
Spooler A True Z Fanatic Join Date: Jun 2014 Location: Ga Posts: 14,109 Drives: 2013 Nismo 370z Rep Power: 2684394	We all know Shewantsthezee had a problem and fingers were pointed as to why. They were actually just a guess. Without monitoring EMAP and EGT's per cylinder you won't know what the actual cause of the failure was. If you have a EMAP sensor at the turbo you will be able to calculate when the turbine wheel is done and pressure starts to back up. What you won't know is if the actual turbo manifolds or exhaust manifolds are causing the problem. By monitoring EGT's it will tell you when you have a restriction in the exhaust manifolds. The EMAP sensor may or may not catch this issue. Last edited by Spooler; 06-23-2023 at 04:36 PM.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
[FOR SALE] Fast Intentions Stage 2 Twin Turbo Kit	Nik@SOHO	Parts for sale (Private Classifieds)	60	10-09-2017 08:11 AM
370Z For Sale 2015 Nismo Tech with Fast Intentions Stage 2 637HP	DPE G	370Z For Sale	2	06-03-2017 11:40 AM
MA Motorsports: FAST Intentions \| HKS \| APEXi \| TANABE	MAMotorsports	Exhaust/Intake	46	05-23-2016 11:12 AM
My 09 NISMO Fast Intentions TT Build	katjmmx	Forced Induction	142	05-19-2016 02:32 PM
[FOR SALE] Fast Intentions Exhaust Build #952 Placement	NismoZ70	Parts for sale (Private Classifieds)	11	03-19-2014 09:27 AM

06-20-2023, 11:53 AM	#1 (permalink)
Spooler A True Z Fanatic Join Date: Jun 2014 Location: Ga Posts: 14,109 Drives: 2013 Nismo 370z Rep Power: 2684394	Don't be expecting big numbers out of my car. I want to drive it and enjoy it for a while. So if you are expecting me to push it on the dyno I am not going to do that. This build has been about efficiency and reliability. I can always turn it up later at an event. I won't get a solid tune on the dyno at that level anyway so why push it.

06-20-2023, 11:31 PM	#3 (permalink)
Spooler A True Z Fanatic Join Date: Jun 2014 Location: Ga Posts: 14,109 Drives: 2013 Nismo 370z Rep Power: 2684394	I grew up driving these. I like this guy at Z Car Garage. LOL

06-23-2023, 04:34 PM	#6 (permalink)
Spooler A True Z Fanatic Join Date: Jun 2014 Location: Ga Posts: 14,109 Drives: 2013 Nismo 370z Rep Power: 2684394	What is Drive pressure. Drive pressure is how much energy it takes to push the turbine wheel of the turbo. How do you measure it. You can calculate the Drive Pressure ratio by the following. EMAP/MAP. The ideal pressure for a drag engine is a 1:1 ratio but for a street car this is not very fun to drive. So where is an acceptable level. On a street car, that is normally no greater than a 1.5 to 1 ratio. So, my car last time it was tuned, the max boost was at 29psi. My car stopped making power at that level so I know the Drive Pressure ratio was at least 2 to 1. 58psi at the EMAP and 29 PSI in the intake manifold. So I had 58psi of pressure from the turbine wheel of the turbo all the way back to the cylinder head. Well, that's a big problem. That's like trying to cram 58psi of boost down the intake. The VQ won't handle it and it torches the headgasket. My head bolts were still torqued to the proper TQ. That means they did not stretch under high boost but I did get #4's fire ring. So, if you are monitoring EMAP, keep the boost no greater than a 1.5 to 1 ratio and the engine will be happy as long as your headgaskets and headbolts can handle the cylinder pressure.