Manual Boost Controller Subaru Forester Legacy Turbo

The Best Manual Boost Controller on the Market.

Who else can offer:

1. 100% customer satisfaction guarantee, if you're not happy with the manual boost controller for whatever reason you can return it for a refund!

2. FREE Technical help via email (aim to answer every email within 24 hours) see our website, we build, race and tune real cars! 

3. Always in stock well packaged in jiffy bags ready for immediate dispatch!

4. We are the biggest and original developer/seller of this design MBC, support & customer satisfaction is our aim.

5. Fitting kit with high quality 4mm ID silicone available for £3+ extra.

More info on boost control:

This boost controller is based on a ball and spring mechanism. A simple turn of a screw is all it takes to lower or raise your boost. It is NOT a bleed valve.

Why are bleed valves bad? Fitting a bleed valve does increase the amount of boost you can run, however they are less than ideal as it is like having one big constant boost leak & leaking un-metered air is not good.

Our MBC comes with instructions. This is the only boost controller you will ever need. Each Boost controller is tested and will hold enough boost for nearly any application.

They install in less than half the time of an expensive electronic type.

This controller is built to last and utilises a stainless steel spring & preload adjustment bolt, no maintenance – very little to go wrong, we have customer with 10 year old MBCs still going strong.

The first step in making a turbo car faster is raising the boost. Its been dyno proven that this design manual boost controller can spool a turbo just as fast, just as strong, and reduce lag even more than the electronic ones do.

Remember, this is the highest quality boost controller you will ever use and also the easiest.

The wastegate valve will usually start to open at around half the spring pressure of the actuator, this is called wastegate creep (as you have the pressure of the exhaust gases acting on the wastegate also). With a standard actuator and bleed valve fitted the wastegate starts to open from as low as 3 psi loosing valuable boost response, with a MBC there in no boost pressure applied to the actuator at all until the pre-determined boost level is reached and then and only then the boost pressure is allowed to flow through he MBC to open the actuator.

Here's what some owners have come back to us  saying:

Hi there.

I purchase your manual boost controller just over a month ago and fitted it a couple of days later. Having had a bit of experience with tuning turbocharged cars, I was astonished at just how solidly built and accurate this boost controller is. This particular one is being used in my Volvo T5, it took moments to fit and adjustment was very simple.

I set the boost pressure to a low starting point and upon the first test drive my calibrated boost gauge showed 8 PSI (stock boost). From that point I simply unlocked the lock-nut, turned the adjuster half a turn clockwise and relocked the lock-nut. A few turns and test runs later and the pressure was set to 12 PSI (my SAFE target boost level). Upon checking the peak boost pressure yesterday – a month after installation, the pressure is still showing as exactly 12 PSI.

Great product; small, simple, solid, very well made and discreet. Oh, and the car goes like stink! Excellent stuff, many thanks!

Regards, Rob.

Graham Impreza owner

"arrived this afternoon mate, works well on scooby, ive left positive feedback fof u ! cheers !"

carl MR2 turbo

"i must say that the power that i am getting from your mbc is amazing. my car would wind up and go really quick, well to my standards @ least. now, its amazing the power kicks in and pushes you into the seat. your product gave me an instant 16bhp, i know that if i can get a fuel cut defender i will be able to boost an extra 2 or 4 psi comfortably."

Glenn MR2 turbo

“I hold more boost so much better than my old bleed valve – and I nearly bought a £425 EBC!”

Mark Fiesta RST

“My actuator had gone soft only holding 6psi, was looking at £85 for a new actuator but fitted this MBC and set it up to run 10psi, car drives like a new motor, 100% happy!”

Matthew Madahar Nova Turbo

"Here are my comments about the MBC. Before I installed the MBC my turbo made 5psi at 2750-3000rpm. After installing the MBC it boosted 5psi at 2250 rpm! My car has now been rolling roaded and now it boosts 9si at 2900 rpm and holds 9 all the way to 6500rpm! Overall I am very pleased I fitted one to my car."

Text message from 07956512xxx

"Perfectly 1 bar boost. *@?! me thats good, car is now fantastic, cant get rid of my smile!"

US MR2 turbo owner:

Gabo

“I bought one of those, one of those exact ones. All i can say are good things. The guy is great and very helpful, shipping is fast. Its a good service. AS for the part itself, i love it. I wouldn’t trade it for anything. It holds boost well, can be set very precise... I actually had a 180$$ dual stage turboxs boost controller, and switch to this 5 dollar one b/c i like it better. So yes, go ahead and buy it. You wont be disappointed. Its a great value!!!”

Gotime

“Yes they are very good and I see it as one of the best investments.

I cant even think of anything bad to say about it. I did not come with hose, but i didnt need it, i had some laying around, maybe you could even use the stock hose. I duno, but its well worth the money.

So just get it, go go go go go go go !!!”