agent712

Man, you guys make it hard. I did a search and started reading all these "Best boost controller" threads... Read one long thread where everyone seemed to think the Blitz SBC ID was the best. Then I read a thread after that where person after person said they knew people who blew their motor because of the blitz. Now I'm like, AHH, someone help me! Profec B seems to always be a favorite. How's it do for spiking? AVCR is definitly a good one I think... but does it do sequentials?

Any help would be appreciated. Sorry for "another boost controller" thread........


Chuck

CantGoStraight

AVC-R will work well with sequentials. It's alittle more intense but offers some nice tunning capabilities over the profec-B. For simplicity the profec-Bis the way to go, unless you choose to go with a manual boost controller.

redrotorR1

I don't think a boost controller, by itself, can pop a motor. If you're tuned on the hairy edge of good a/f ratios, then yes, you could pop the engine if you ran too much boost. But as long as you play the game on the safe side, there shouldn't be any issues with whichever boost controller you chose.

FWIW, Blitz controllers seem to be everybody's favorite (forum members and tuners). The couple of guys I know with the AVC-R say it's cool, but it's got way too many features ... difficult to just change the boost setting on the fly. And, yes, the Profec B is the simple-man's best bet. Good luck.

ArchangelX

Blitz DSBC!!! If my WRX had sequential turbos it'd be on there!!!

Once I start modding my RX-7..that's the one I'm getting.

Chaz

I'm using the Profec B and really like it. I guess it just depends on what features you really want. Find the money that fits your needs for the best price.

racer rx

Yes, the Blitz SBC-ID is the one!
The only way I could see one blowing the motor with this is careless tuning.

I has a built in Boost gauge, with a Preset for Warning and limiter functions to control overboost situations.
I have had the SBCID for about 3 months now and do not regret getting it.

It also has 4 preset boost levels and a boost graph to see how stable your boost is thru all gears.

It's just plain Awesume!
Get it... forget the Profec... that's old technology. And to guys that have used the Profec... try the Blitz. You won't know till you've tried it.

jc.

speedypete

Sport Compact Car claimed that the Profec B was the best for sequential because it's simplicity didn't confuse the car upon transition from the small turbo to the large one. Another mag recently did a test of various controllers on an eclipse and while the Blitz gave the most boost consistently, I believe the Profec B controlled spikes the best. Sorry for mag quotes instead of first hand knowledge, just trying to help...

rxrotary2_7

i have used the avc-r since it came out. i like it, and you can dial out the *spike* completely. now i am using it on my single turbo, car not up and running yet, but i am sure it will be fine for that also.

GoodfellaFD3S

iTrader: (213)

I've had my profec B for over 2 years and love it. I don't spike at all. Highly recommended .

r71

iTrader: (3)

Is HKS ****? How come no one's mentioning the evc 4?

agent712

Well, as far as the blitz goes... yes, it could appear to work as a quality unit. But I've heard several complaints of blown motors because of their blitz. They could simply all be related to a specific failure of some part of the system. If a part fails, the warning system won't funtion, and if you aren't paying attention, then yes, you could blow your motor. I would like to believe these claims are false though also as it seems to be "the best" in everyones opinion... but I just wanted to point out the fact that a boost controller, if it fails to function properly, can end in a blown motor.

Later
Chuck

agent712

gonna give this a bump


Later
Chuck

bureau_c

Well, they're *supposed* to fail in such a way that the solenoid opens, allowing maximum pressure on the wastegate actuator...i.e. max 7 lbs or so. However I know a guy who blew his motor when something went wrong with his Profec-B and he hit 20+ lbs. So much for failsafes...

jds

agent712

ttt

agent712

What's the difference between the Blitz SBC ID and SBC DC?

Thanks
Chuck

agent712

And will a Blitz DSBC function correctly with the sequential twins? I'm under the impression it would control both wastegates simultaneously..... Anybody have comments on that? We need to decide on a profec B or a Blitz... it's just that I don't know which blitz to look at!

Thanks
Chuck

racer rx

I have the Blitz SBC-ID... the DC version does not have all the features of the ID unit.

Missing is the future hook up to the power ID:
For HP and 1/4 mile tracking + more.

Also missing is the boost graph I think and the it's a slightly different LED set-up. ect.

I my opinion still worth it to grab the SBC-ID.

jc.

BoostedRex

I've heard nothing but good things from most every hardcore tuner that I know about the SBC-ID. I'll be running that one soon myself. The Profec is a solid unit, but doesn't have the technology that the Blitz does. When you have an engine as quirky as the Wankel, the more failsafes you have, the better. Just my .02

Zach

agent712

What about this Blitz.... http://cgi.ebay.com/ebaymotors/ws/eB...872307792&rd=1

will it function properly with sequentials?

Thanks
Chuck

ROTARYFDTT

iTrader: (4)

how about simply using a manual boost controller, I've been looking into buying one over the winter.

agent712

We had a couple manual boost controllers on there I purchased off ebay. They plain did not function. Not saying a better quality one wouldn't work, just not interested. I'd rather have something I could dial in electronically.

Thanks
Chuck

ech

The PFC main ECU probably has the best control. Read on before you laugh at me.

AFAIK all of these mentioned above only really control one wastegate, and let the stock ECU (or whatever you have) do the control on the other. You can T them into both the WG and precontrol, but then you have other problems. Between 3K and 4.5K All the exhaust charge is split between generating boost and prespooling the second turbos. If you only control boost, then you can get erratic prespool.

This works OK for most people, because they really only care about the 4-7K range. And the stock and PFC ECUs do a fair job of maintaining a 10-12 lb level for 23-4.5K with decent prespool control.

AND you can use a manual boost gauge to further tweek the level of the first trubo.

But the PFC has independant control of the WG and PC valves - and knows about prespool, and has some closed loop functions to "learn" towards the target values. In most cases, with a healthy car and hoses, The PFC does a really good job.

So functionally, I'm not aware of anything that has more control of all phases of the sequential system. In terms of accuracy, or end results, each person has different experiences.

DamonB

ech, that's the first time I have ever heard someone say the PFC controls boost better than a stand alone boost control. I don't remember what the particular issues are, but the conventional wisdom prefers controllers to the PFC?

ech

Here is a datalogging graph that shows the PowerFC controlling both the Precontrol Solenoid and the Wastegate solenoid independently. You can see it adjusting the duty cycles of those solenoids to achieve boost levels, and you can see that the PC is used below 4.5K and the WG is used above.



Does anyone with the ACV-R know if it controls both the PC and WG? Another post I read suggested to me that it might.

agent712

How about the Profec B and Blitz SBC? Do they control the precontrol and wastegate sperately? That's what I've really been trying to find out with this thready. I'd like to know which boost controllers funciton this way.



Thanks
Chuck