The jig is up! Here it is...
08-21-2008 | 05:03 PM
#51
Über User
Joined: Sep 2005
Posts: 9,532
From: lemont, Illinois
i think you could safely boost more than 10 psi for a track day but i would be weary of doing 21 myself for lap upon lap.... your being to nice on it lol. its an inline six thats been built from what you said should be great for trackdays nothing beats an inline for the abuse a track day puts on a motor
08-22-2008 | 06:25 AM
#52
Registered User
Joined: Aug 2004
Posts: 1,075
From: Bay Area, CA
Originally Posted by lww
I'm running a GReddy ProFecB dual boost controller so I have two boost settings that I can adjust, but it's more "convenient" to limit it to two (or three) fixed boost settings that you have "tuned" in the ECU.
With the ProFecB turned off, I actually have the base 8psi boost setting. The "Low" boost setting on the boost controller is currently set at 12psi and the "High" boost setting is currently set at 21psi.
In real time, I can adjust between and around these boost settings, but I can switch between each "standard" setting with the push of a single button. I don't want to be "turning *****" in the heat of battle! Too much opportunity to screw things up. I "cruise" around on just the stock waste gate setting at 8psi and while I'm breaking the motor in, I'm only using the "Low" boost setting at 12psi "in anger".
Once motor is fully broken in, I'll use the stock 8psi for "commuting", the "Low" boost setting for track work and the "High" boost setting for...
With the ProFecB turned off, I actually have the base 8psi boost setting. The "Low" boost setting on the boost controller is currently set at 12psi and the "High" boost setting is currently set at 21psi.
In real time, I can adjust between and around these boost settings, but I can switch between each "standard" setting with the push of a single button. I don't want to be "turning *****" in the heat of battle! Too much opportunity to screw things up. I "cruise" around on just the stock waste gate setting at 8psi and while I'm breaking the motor in, I'm only using the "Low" boost setting at 12psi "in anger".
Once motor is fully broken in, I'll use the stock 8psi for "commuting", the "Low" boost setting for track work and the "High" boost setting for...
08-22-2008 | 09:30 AM
#53
Registered User
Joined: Mar 2003
Posts: 373
From: WA
Great work on the car 
. I like that you had a goal to make it "streetable" and it looks like you accomplished that. Just curious why you choose to use 4.10 gearing in the rear end. I had a 4.11 R200 mated to a non-turbo ZX tranny in my old L28et 240Z and I was much happier when I switched to a 3.54. The ZX tranny gear ratios are pretty close to the Z32 ratios.
You can run high boost on the track if you add traction control
. I think steering wheel buttons that trigger the profec would do the trick. Low boost when brakeing and downshifting into a turn and high boost after you put the power down.
. I like that you had a goal to make it "streetable" and it looks like you accomplished that. Just curious why you choose to use 4.10 gearing in the rear end. I had a 4.11 R200 mated to a non-turbo ZX tranny in my old L28et 240Z and I was much happier when I switched to a 3.54. The ZX tranny gear ratios are pretty close to the Z32 ratios.You can run high boost on the track if you add traction control
. I think steering wheel buttons that trigger the profec would do the trick. Low boost when brakeing and downshifting into a turn and high boost after you put the power down.
08-22-2008 | 02:28 PM
#54
Thread Starter
Head Muckraker
Joined: Oct 2001
Posts: 9,221
From: Bay Area
Veyenyl, good question and good observation!
I'm converting from the current 3.70:1 to the 4.10:1 because I'm switching to an RB25 transmission and the gears are much taller in that tranny necessitating the need for the shorter rear end gears.
I'm converting from the current 3.70:1 to the 4.10:1 because I'm switching to an RB25 transmission and the gears are much taller in that tranny necessitating the need for the shorter rear end gears.
08-23-2008 | 05:51 PM
#60
Thread Starter
Head Muckraker
Joined: Oct 2001
Posts: 9,221
From: Bay Area
Originally Posted by snwbrderphat540
what why? Z32 tranny FTW hella strong why spend more money to do that? the gearing going to be that beneficial from the change for track racing?
And it'll fix some driveline geometry issues that are virtually impossible to mitigate with a Z32 tranny.
Last edited by lww; 08-23-2008 at 05:56 PM.
