I noticed that a lot of poeple are running the Greddy Profec B boost controller, but i was wondering if it necessary? Would a mechanical boost controller set to 10-12 PSI be fine or is a mechanical one recomended?
Thanks

 

A manual/mechanical one will be just fine. The electronic one is jus tmore convenient.

Dave

 

good ol' greedy profec b.....old school

 

Boost controllers come down to personal preference. At the end of the day, they all do the same job, but there's different approaches.

Manuals do work well, but take more time to set up (make a run, stop car, pop hood, turn ****, close hood, repeat). Once they're set, you can't easily switch them off or make further adjustments without the pop-hood routine.

A simple electronic boost controller works quite nicely and eliminates the running around, not to mention most boost controllers have 2 presets (a low and high boost, for example) as well as being able to turn them off.

More advanced boost controllers (like the AVC-R) let you set boost by RPM and gear, among other things. The learning curve is steeper and tuning time is QUITE a bit more, but you can really fine-tune the boost curve with an advanced boost controller. You'll also pay more and have to invest much more time in programming.

Really, I'd watch Ebay and the for sale forum - I've seen older electronic boost controllers go for around $100. Just avoid the old Profec A - that thing is just terrible, most anything else will do great. The old-school HKS EVC's work really well, are reliable as hell, and go for VERY cheap many times.

Dale

 

I've been told numerous times over the years that the dual solenoid blitz controllers are the best choice if you're looking for the absolute best controller out there. Having said that, I've run an old school greddy profec b for about 5 years now and been very happy with it

 

Turbosmart sells a manual boost controller that mounts in the cabin of the car. I have one. It works great and I don't need to leave my seat to make adjustments.

 

Get your info current... http://www.boostcontroller.com/index...6category%3D97

 

I dont want to thread jack but what MBC would you recommend? I want to raise my boost to 12 psi (stock turbo's and ecu) safely and reliably. I just ported my wastegates and am lookin to buy one. I dont think i need a Hallman Pro or anything that crazy for just 2 psi. Dunno, what do you guys htink?

 

I had an old HKS EVC in my GTR. It was the type with 3 buttons for high, low, and manual with a ****. Worked perfect even though it was a few years old. Pretty much, you cant go wrong with most of the stuff that's on the market. I have an Apexi AVC-R in the FD now, but I'm thinking about going manual. I dont know

 

http://www.geocities.com/chmwatson/FAQs/mbc.html

These ball-spring MBC's work more consistently than the needle-valve types, because they eliminate the stock ECU and solenoid valves from the loop.
check out these threads:

https://www.rx7club.com/showthread.p...+boost+control

https://www.rx7club.com/showthread.p...ht=ball-spring

Dave

 

The HKS EVC-EZ is one of the simplest electronic boost controllers out there besides the Greddy Profec B and Type S (new version of the profec B). They do not make the EVC-EZ anymore, but do a ebay search and you can find one...one **** to turn boost up and down.
I run the greddy Type S.

 

It's nice, but it's $159 for a manual? Hell, I got my AVC-R used for $250!

Just saw the old-school HKS EVC on Ebay yesterday, buy it now for like $110 or so. That's a great, simple boost controller.

Dale

 

What about the AEM Tru-Boost? I was thinking of buying the a/f ratio guage, and the boost guage AEM makes would match, but I don't hear anybody raving about that...

 

I was looking for one too... after searching the forum, it seems the Profec B is the best. The Apexi unit is nice as well, but a little more complicated. My friend has one on his GTI and still doesn't know how to adjust it right. I read the manual and it looks similar to the PFC as far as adjustments. But if you just want to dial in the boost and go... Profec B all the way. This is probably the route I will take.

I found this site with some good comparison info...
http://www.sportcompactcarweb.com/te...boost_control/

 

I don't mean to change the subject but I have a question.

If I was to get my FD tuned with all the supporting mods at a particular boost level, say for arguments sake 11 psi, would it be ok to turn the boost up to 13.5 without retuning or should I have it tuned for both boost levels? I don't want to blow my engine up. I just want to be able to run regular 10-11 psi daily and crank it up when I've got somebody to race or I take it to the track.


I'll have the ported wastegate, apexi fc, fuel pump, ic, intake, dp, mp, cat-back.

 

doesnt the apexi PFC double as a good boost controller?.... or would i have to run a AVCR and PFC

 

ive run a turboxs hi performance manual boost controller and it has worked great for about a year. and its only about $120

 

The best answer is no it would not be okay. The whole point of custom tuning is to get the most out of your set up for a given max boost. The most is up to you whether is for power or reliability. With you upping the boost you are basically ******* all that up. So why tune it in the first place?

Regarding whether you should be tuned for 11 psi and 13.5 psi. If you are tuned for 13.5 psi you are also tuned for any boost level under 13.5 psi. You only need a retune when you up the boost.

 

I think that by now you should know that you can't run over 10 psi on the stock ecu!

It seems like every electronic thing made by AEM for the FD has been an improperly functioning piece of ****. I wouldn't trust anything they make. Their wideband AF controller can't even integrate properly with the Datalogit.

The PFC uses the stock solenoids to control boost....aftermarket controllers use better solenoids (and ones that aren't 10+ years old too).

Already well answered by Montego. People should spend more time reading about EFI tuning if they are going to get programmable ecus....

 

I've had both the profec B and the AVC-R. I'd still take my $150 manual turbo smart one anyday.

 

Thanks guys, really appreciate the responses. You answered my question. I should set the boost at my highest level I intend to run before I have it tuned.

Next Question. What solenoid does the Profec B replace?

thanks again,
Jeremy

 

the wastegate actuator solenoid......

 

So the Turbo Pre Control stays intact or does the Profec replace that too? I would like to be able to control when my secondary prespools, is that possible with the Profec B Spec II?

Thanks for being patient with a noob,
Jeremy

 

So when intsalling a profec b and its solenoid, we can remove "I"?? Which is the Solenoid Valve Wastegate control? So replacing "I" the stock solenoid with greddys solenoid is what must be done? Just want to clear this up because im looking to get one as well.

 

You don't have to replace anything.....you bolt the EBC solenoid in the engine bay and disconnect and plug the line running from the solenoid to the actuator. Pre-spool is not directly adjustable with the normal way of hooking up a Profec B. However, spiking will not occur because of the EBC will use the wastegate to manage this.