APexi AVCR Boost Controller

[BlitzBoy]

Has anyone fitted this boost controller to the twintub RX7?
and did they have any problems with the sequential setup of the
car?

[Grizzly]

It can be done but try to keep it simple on the twins, the solanoids arnt the most reliable things in the world and the Pipe work is a bit of a knightmare too.

Have you uprated the ECU/Fuel system? if so what ECU are you running?

If its a Power FC then you can add a simple Amal valve that is controled by the ECU and can be ajusted by the Controler. Most other Uprated ECU\'s are very simalar Haltech,Motech etc

I would steer away from the Piggyback type boost controlers and keep it as simple as possable.

Chris

[BlitzBoy]

cool, I\'m still looking to buy my first rx7 3rd gen, I\'ve just got an oppurtunity to buy an APEXI AVCR cheap at the mo.
I\'ve looked on a link to a website from here that shows the installation on a Rx7, it doesn\'t look to hard to do.
Whats the most boost are u able to run without ecu mods?

[bnaellis]

Blitzboy,
I think the max the standard apex seal can take is 15psi approx .95 bar You can run higher boost but would not be a wise choice with standard apex seals especially if you have above average mileage.

rgds


Brian Ellis

[BlitzBoy]

cool, I heard conflicting points that the FD runs  12 psi standard,
but some people say its only 10 psi.
I thought it was 10(first turbo)-8-(Second turbo)10psi.
Which is true??
I think 14psi to 15 psi would provide quite a kick in the back in
an already fast car !:D

[bnaellis]

Blitzboy,
Pre 96 run 10 psi
I believe that post 96 pre 99 run a tiny bit higher but more or less the same and post 99 ran approx 11.8 psi I say approx cause I knwo in mmhg but don\'t know exactly the conversion to psi.

rgds

Brian

[BlitzBoy]

ahhh that explains why post 99s run 280bhp due to the different turbos and running higher boost.
So by running a pre 96 (uk spec for example) at 13 to 14 psi it should run 280 or more bhp, Am I correct in this assumption?
What spec is your 3rd gen running at Brian?

[bnaellis]

I found a converison I think it\'s right the 99 spec 280bhp rx7 runs at 570 mmhg which is approx 11 psi
If you had a normal 265 bhp rx7 and upped the boost a little yes you would hit 280 quite easily. The main changes on the 99 spec to increase power to 280bhp were the turbo\'s for better accelerated air flow, 10% less exhaust back pressure, 80% better flow to the intercooler, and increase in boost pressure in the ecu.
I have a 98 Touring X (auto)
my boost gauge shows I am running .8bar but I doubt it very much, I guess a slight inaccuracy with the boost gauge. The boost was not actually changed as such on post 96 pre 99 cars but it had a ecu that managed the fuel and turbos better than pre 96 cars. I have a blitz catback & blitz induction kit, a better flowing exhaust does raise boost but I do not think my blitz catback would raise boost to .8bar on it\'s own yet maybe I don\'t know. I am taking my car to a dyno soon to see how it performs as I have someone coming over from Japan in April with some goodies for me one of which being a panspeed hiflow cat so I will perform another dyno then and see how the increased flow affects things.

rgds

Brian Ellis

[BlitzBoy]

So your running about 11.6 psi at the mo.
Cool..the mods I\'m planning (getting ahead of myself as haven\'t got the car yet lol) Will be the Apexi Boost Controller (13-14psi), Blitz NUR exhaust, Decat pipes with downpipe (of course I will retain the cat for MOT time),Trust Airinx dual intake filter system, this should net 280 bhp plus on a uk spec or I\'m missing something?

[bnaellis]

LOL.  Rather than the apexi boost controller with those mods you would need an apexi ecu, apparently boost can be controlled with this also, I do not know how well though. with the rest of the mods stated you will be above 280 bhp. Once the catalyst converter is removed and replaced witha midpip you release a serious amount of power. You can leave boost standard with those mods you want and still hit 300 bhp. A lot of power is released when you de-restrict the rx7 exhuasts system.

rgds

Brian

[BlitzBoy]

Yes Apexi Power FC ECU would be the way to go, but given its price I would keep that on hold until I would save enough dosh
for a single turbo conversion (one can dream for now lol) and do it all in one hit.
Does the Power FC handle bigger injectors when doing single turbo conversion? I suppose that question would be best answered by someone who has done it on this forum.

[bnaellis]

Yes it does, it both handles bigger injectors & additional injectors.
rgds

Brian

[BlitzBoy]

Thanks for your help Brian...
now to get the car .
I see you live in Croydon, I only live down the road in Sutton, so we will have to hook up once I\'ve got it.

[bnaellis]

Sure mate. I am often just down the road from you in wallington actually. I got alot of family that lives down that way.
When you planning on getting one ??

rgds

Brian

[BlitzBoy]

My insurance money will be coming in 2 weeks I\'ve been told,
So March time, hopefully the 2 uk spec FD rx7s I\'ve seen for sale will still be available when I come to buy