nocab72

Correct, you want your actuator or wastegate spring set as close to your target boost level as possible, this allows the spring(s) to do most of the work and the EBC as little as possible. When there is a large difference between spring weight and target boost, the EBC has to work very hard to keep the wategate closed while trying to reach the target boost level. The HKS is a dual soleniod & has a unique stepper motor. Yup, SBC-ID claims the same.

Forum just ate my last attempt to post, so this one will be shorter... I've fussed with just about every boost controller available installed on either RX7's or Supra's, because at least in the RX7 world noone would even think of using the PFC Boost kit on their single turbo 7, with stock twins yes, but that's it. I'm new to the GTR world, so excuse my ignorance if I show any! Reading the various boost controller threads, I've noticed several individuals recommending the use of the PFC Boost kit when using the PFC ECU on a upgraded twins or single turbo car. What advantages are there to using the PFC Boost kit v/s a full featured EBC besides the following two: (which haven't sold me on using the PFC boost kit) 1) all in one ECU/Boost control makes datalogging easier, but if the car is a MAF car and you tune the PFC map via 20x20 map and are at 15x15, you got there via MAF v/s RPM, who cares what the manifold pressure is? 2) PFC Boost Kit is a couple hundred bucks cheaper than SBC-ID Am I missing something, or is there not a reason to give up the richer feature set of the SBC-ID in leu of the PFC Boost Kit, ie 4 settings, dual solenoid, speed based boost, better boost/gain adjustability, better graphing/peak/hold, etc, and another cool looking HC, lol Thanks for your opinions! K

Tee into the factory MAP sensor which runs the interior factory boost guage. Comes off the plenum near the throttle body butterflies, snakes over to the driver side, MAP sensor is mounted via bolt and bracket to the fenderwell about 4 inches forward of the firewall. DO NOT Tee off the fuel pressure regulator manifold pressure feed. K

Took a few minutes and crunched some #'s with .xls. Do these calculations looks close for a stock RB26? http://flathat.woodstream.net/R33/rb26comp...sormaptech.html If so, they line up very nicely with a GT40R... K

Car: '95 GTR R33 V-Spec, RB26DETT Miles: 24,000 Current Condition: Bone Stock Have ordered most of the STD goodies to prepare for this buildup: * Nismo TwinPlate * PFC w/Commander & Datalogit * Fuel Rail, Pump, Lines * HKS Type R Intercooler * 264 Cams, Cam gears, etc etc, etc, etc... Just finished my RX7 single project, Large Street Port 13b w/Garrett GT35/40, put down 420rwhp @ 16psi (94 Octane pump) and just over 500rwhp @ 22psi (100 Octane). Get excellent spool for my driving habits, starts boosting by 3800rpm, full boost by 4500 - 4800rpm & 9000rpm redline. Would like to have similar spool and performance caracteristics on the GTR and looking for insight on a single turbo choice for it. The car will be 98% street driven, with a current power goal of 600awhp (US Dynojet). Am currently looking at the Garrett GT40R or GT42R. Will the GT40R take me to 600awhp? Are there other singles I should be considering? Thanks for your expertise, opinions and advice! K

http://www.speedforceracing.com/skyine_new.html US based company though. K

I use the PFC on my FD (RX-7). My R33 GTR hasn't arrived yet (end of the month), but I'll also be using the PFC/datalogit/WB, etc on the GTR. The stock pressure mappings on the FD PFC provide cells to about 17psi and 8000rpm. With the datalogit software you can modify the map references for the cells and create extended pressure and rpm maps. For example my FD map now reaches 8800rpm and 24psi. You still only have a 20x20 grid to work with, but by have less granular areas of the map which you don't "spend alot of time in" allows you to "stretch" the limits of the map to suit your needs. Stock, the FD uses a 2bar MAP sensor, I was able to splice in a 3bar map sensor, adjust a few settings in the PFC and utilize it. My motor is built to rev higher than stock as well, so I expanded the rpm map to reach the new 9000rpm redline by using a combination of 400rpm and 500rpm increments in the cells opposed to the stock all 400rpm increments. K