mbc, safe or not?

[danny-R]

just after a bit of advice really on mbc's. I have just fitted a boost gauge on the volvo and took it for a little test run, floored it in 3rd and it sat on 1bar all the way through the gear. not had chance to see what it's boosting in 4th and 5th or what it over-boosts at.
All i would like to know is if it would be safe enough to run a mbc also, not wound right up just want that little but more but still keeping it as safe as possible. I believe the custom map that i'm using may have removed the boost cut limiter and the last thing i want is a bent rod.

is there anyone else running 18/19t with custom map AND mbc?
if so i would love to hear your views

cheers
danny

[mattp]

From what I've learnt on here, the risk with the MBC is that due to the way it works you can potentially get lots of boost from quite early on in the revs, and it's these high levels of boost at low engine speeds that the rods don't like. So it's all down to the way you drive it, if you feather the throttle to keep the boost lower as your building the revs up then you'll have less chance of a problem running an MBC.

Personally I am running one (allbeit on a standard map and an auto) and have had no problems so far, although I'm now considering an upgraded map as I'm getting fed up with hitting the fuel cut!

[danny-R]

fed up with hitting the fuel cut!

that's what i'm worried about, if the limiter has been removed god knows what would happen but on the other hand i have read on here of people running like 18-20 psi. i would just like to know sort of how much boost i could run on standard internals.

i don't know how to feather the throttle btw, it's just toe down and go!

[Wobbly Dave]

You can get a remap for 150 quid.

[mattp]

You can get a remap for 150 quid.

HLM? Have thought about that. Might be a really stupid question but do they need the car or can it be done just having the ECU? (i.e could I post my ecu to them, as i'm quite far away)

[danny-R]

HLM? Have thought about that. Might be a really stupid question but do they need the car or can it be done just having the ECU? (i.e could I post my ecu to them, as i'm quite far away)

yes he offers a postal service which allows you to keep your ecu until the hlm'd one arrives then send off your old one, or you could go down there which for me cost a small fortune alone. but then you have that piece of mind knowing it has been looked over and rolling roaded before and after if you wanted.
i had the 304 map on for a year and it was well worth the money.
i would highly reccomend the 304 you won't be disappointed.

[Wobbly Dave]

Worth going just for the abuse. I get 10% off my abuse. LOL

[Rnash2002]

just after a bit of advice really on mbc's. I have just fitted a boost gauge on the volvo and took it for a little test run, floored it in 3rd and it sat on 1bar all the way through the gear. not had chance to see what it's boosting in 4th and 5th or what it over-boosts at.
All i would like to know is if it would be safe enough to run a mbc also, not wound right up just want that little but more but still keeping it as safe as possible. I believe the custom map that i'm using may have removed the boost cut limiter and the last thing i want is a bent rod.

is there anyone else running 18/19t with custom map AND mbc?
if so i would love to hear your views

cheers
danny

To be fair i wouldnt even go there,now if it was a electronic boost controller that you can set the boost to come in alittle slower and more progressive then fine,your running a 18/19t so more power than a normal 15g t5 wound up to 1 bar boost so more stress on the engine internals.
The manual boost controller with bring your boost in too quick.

[danny-R]

something along these lines? no particular make?
cheers
http://cgi.ebay.co.uk/HKS-EVC-IV-Ele...item3caa4fb203

[Rnash2002]

something along these lines? no particular make?
cheers
http://cgi.ebay.co.uk/HKS-EVC-IV-Ele...item3caa4fb203

Yes something like that,loads of different ones out there,apexi does a great one that i think has a setting for different boost settings for different gears your in.
Pedro has one should think he will be along and tell you more about it.

[Jamest5r]

Why not send the ecu back to Hamish and get the boost turned up on the map? seems a better way of doing it mate

[p fandango]

are you already running a remap becuase 1bar is high if not?

i swear by MBC's but am running an Apexi AVC-R EBC with my 19t

[p fandango]

opps ok i've actually read your post now mate, yes your custom remap with of certainly raised if not removed the standard boost limit. Running an MBC/EBC could end in tears if your not careful as the ECU will just let you do as you want, but fitted either will help give the boost a bit more aggression.

As Rnash has said if your intending to swop to a bigger turbo an EBC will help keep everything under alot more control. As he also said on my Apexi i can set different boost levels or duty cycle (how aggressive the boost cuts in) per gear to help with any traction issues. You can also run a button to either raise the boost when pressed for overtaking or to lower it to help get off the line

[danny-R]

i think james is right, i should have thought of that sooner.
will give him a call tomorrow and see what he suggests.

[PNuT]

1 bar upto 4k...

[danny-R]

1 bar upto 4k...

that's how mine is mapped at the minute, then either 1.2 or 1.3 after 4k.

i have just been upto ikea at the metrocentre there, on the way i dropped it into 4th and gauge held 1.2 bar and the same in 5th.

i like the feel of it after 4k but it just feels like it should be kicking in earlier, feels more like a vtec.
i will see what hamish says on the phone tomorrow, see if he can work his magic on it.
I think it's decided then, i won't be fitting a mbc

cheers

[Jamest5r]

Hi mate, 1.3 bar after 4k is about as far as you should push it mate, you dont want that sort of pressure lower than 4k as you will be in rod bending territory, 2.5-3k at 1.3 bar will bend stuff!!!

You have a very fast car there mate its just you've got used to it.
What did it get on the rollers??(im back on them friday afternoon)

Cheers

[danny-R]

just got in from work now mate and not had chance to ring hlm yet, will do that tomorrow. it had a few goes on dyno & i recall it getting 286@wheels but the printout that was emailed to me said 270ish.( will try and upload that file now).

i think your probably right, i'm not going to see much more power without stronger internals etc = a lot of money lol.

james, i have emailed you it to your hotmail. i'm useless i know.

for anyone interested the copy i have reads, 277@wheels and 396nm.
but like i say, on the day it made 286 and over 400nm,
don't know why i wasn't sent that one though.

[danny-R]

What did it get on the rollers??(im back on them friday afternoon)

Cheers

what are you expecting? as close to 300 as possible? lol.

are you using 18 or 19t

cheers

[Jamest5r]

Mate im really sorry to tell you that the clutch power on your graph is the power at the fly not the wheels, just checked mine from the other day 288.74 clutch, 264.67 wheels, 427.49 n/m

Edit: Just seen your above post, a 16t on my auto map still, custom on friday so maybe over the magic 300