Is an MBC better than a remap?

carswaps · Jul 11th, 2007, 22:47

I,ve got an mbc (armval) runing 14psi (1bar)
got 283 bhp and 407.7nm torque, i would love more but is Rica the way? or is other mods a better option?
can i turn up the boost any m ore without that loud bang going off?
would removing the cat be can idea?
any ideas/ help would be great

Ross9 · Jul 11th, 2007, 23:40

No, an MBC is not better than a remap.

An MBC will push the boost up, the ECU's map will alter fuelling and igntion timing to suit, but only in a reactive fashion to deal with the extra boost it doesnt expect to see, decent gains can still be had though.

A remap optimises everything to higher boost/better parts, it costs more because it's better.

Ross

Mehboob · Jul 12th, 2007, 08:41

Im running 1,1 bar with my mbc, no probs at all. I also removed the cat, but at the same time, the middle box ( big square silencer ) was removed as it was rattling. It was replaced with a Powerflow freeflow silencer.

With this combination, the car boosted hard over 3000 rpm, and held boost. The car was absolutely awesome during boost. But I have an auto and under 3000rpm, the car was completely hopeless, it had no energy at all, making town driving very annoying. Added to that was the loud, very loud drone of the exhaust. In the end I put the cat back, its now quieter and drivable.

Theres a guy who has s70r running 1,4 bar boost ( mbc - has 18T ) without a cat and he is more than pleased with his car.

I did a 1500km journey running 1 bar boost with 3 passengers and luggage, used 11L/100km fuel ( 95 unleaded - coastal driving ) and the car ran without any glitches.

To answer your question, a remap is better than an mbc.

powernut · Jul 12th, 2007, 11:10

Quote:

Originally Posted by carswaps

I,ve got an mbc (armval) runing 14psi (1bar)
got 283 bhp and 407.7nm torque, i would love more but is Rica the way? or is other mods a better option?
can i turn up the boost any m ore without that loud bang going off?
would removing the cat be can idea?
any ideas/ help would be great

bloody hell what ur ur engine specs ?im runing a rica 304 at 1.2bar and dont think im getting those figtures/thats with a decat as well/

carswaps · Jul 12th, 2007, 22:14

whats the best way to set the mbc? as it came set up as it is?
any help would be great?

stusT5 · Jul 13th, 2007, 17:52

You will need a boost gauge i have a psi one from ebay 20 quid run the pipe throug the bulk head and attach to the vacume tree by your throtle, wind the mbc wayyyyyy open and adjust half a turn at a time going down the road. make sure the mbc is wound open before starting or you might not have an engine to play with for very long.

bigV · Nov 27th, 2007, 21:12

Sorry to bump this thread...

But how the hell do you guys run 13+ psi without hitting the fuel cut off thing?

I can make my MBC run 15psi, but at about 60mph full gas the car jolts and cuts the boost....

I can only run about 11psi with my MBC without any issues...... interestingly my car only boosts 6psi as standard though?

irf · Nov 27th, 2007, 22:03

i think it varies from car to car. when i had an mbc/ebc i had it set to 15psi but would get fuel cut in cold weather in fifth gear on a light throttle. then you have lucky buggers like pedro i think where he boosts to something like 20psi and no problem. he obviously has supporting mods though.....i hope lol.

Engineer · Nov 27th, 2007, 22:57

If we are talking use it for work, drive it around the world etc, then IMHO not when compared to an MTE map

Cheers

Jod T5 · Nov 27th, 2007, 23:10

Quote:

Originally Posted by bigV

...... interestingly my car only boosts 6psi as standard though?

thats probably where you should start....

if your boosting 4 psi less than stock AT stock set up then this is where your problem lies.....
regarding fuel cut out, the turbo will produce as much boost as the wastegate allows, however the knock sensors will detect when a problem is apparent and cut the fuel...the ecu is also able to detect a certain amount of "overboost" via the cooling effect on the MAF sensor, although other principles will also apply...
A Remap is clearly preferential to a MBC.....as it allows a higher amount of petrol fueling to compensate for the increased boost across the map....
FSE AFR meters......can be installed with a MBC but im not convinced its worth the aggro
cheers
jod

Jul 11th, 2007, 23:40	#2
Ross9 Master Member Last Online: May 27th, 2022 22:00 Join Date: Dec 2002 Location: Lanark	No, an MBC is not better than a remap. An MBC will push the boost up, the ECU's map will alter fuelling and igntion timing to suit, but only in a reactive fashion to deal with the extra boost it doesnt expect to see, decent gains can still be had though. A remap optimises everything to higher boost/better parts, it costs more because it's better. Ross __________________ Astra SRi, wifes S60 T4, and her old S40 T4 though its sat engineless for 7 years since I last updated this project link..better updates soon http://www.volvoforums.org.uk/showthread.php?t=47573

Nov 27th, 2007, 21:12	#7
bigV Member Last Online: Apr 3rd, 2016 20:16 Join Date: Oct 2006 Location: Coventry View Photos By: bigV	Sorry to bump this thread... But how the hell do you guys run 13+ psi without hitting the fuel cut off thing? I can make my MBC run 15psi, but at about 60mph full gas the car jolts and cuts the boost.... I can only run about 11psi with my MBC without any issues...... interestingly my car only boosts 6psi as standard though? __________________ 1994 T5 Auto. MTE remap, TME cat-back, Strut Brace, HID's, 302mm brakes.

Nov 27th, 2007, 22:03	#8
irf Member Last Online: Jan 1st, 2014 13:05 Join Date: Sep 2006 Location: nw london	i think it varies from car to car. when i had an mbc/ebc i had it set to 15psi but would get fuel cut in cold weather in fifth gear on a light throttle. then you have lucky buggers like pedro i think where he boosts to something like 20psi and no problem. he obviously has supporting mods though.....i hope lol. __________________

Nov 27th, 2007, 22:57	#9
Engineer Rubbing son is racing.... Last Online: Jan 18th, 2017 14:26 Join Date: Nov 2004 Location: London	If we are talking use it for work, drive it around the world etc, then IMHO not when compared to an MTE map Cheers __________________ Engineer

Jul 12th, 2007, 08:41	#3
Mehboob Junior Member Last Online: Dec 21st, 2011 11:06 Join Date: Apr 2006 Location: Cape Town View Photos By: Mehboob	Im running 1,1 bar with my mbc, no probs at all. I also removed the cat, but at the same time, the middle box ( big square silencer ) was removed as it was rattling. It was replaced with a Powerflow freeflow silencer. With this combination, the car boosted hard over 3000 rpm, and held boost. The car was absolutely awesome during boost. But I have an auto and under 3000rpm, the car was completely hopeless, it had no energy at all, making town driving very annoying. Added to that was the loud, very loud drone of the exhaust. In the end I put the cat back, its now quieter and drivable. Theres a guy who has s70r running 1,4 bar boost ( mbc - has 18T ) without a cat and he is more than pleased with his car. I did a 1500km journey running 1 bar boost with 3 passengers and luggage, used 11L/100km fuel ( 95 unleaded - coastal driving ) and the car ran without any glitches. To answer your question, a remap is better than an mbc.

Jul 12th, 2007, 22:14	#5
carswaps Member Last Online: Feb 28th, 2024 08:19 Join Date: May 2006 Location: West yorkshire	whats the best way to set the mbc? as it came set up as it is? any help would be great?

Jul 13th, 2007, 17:52	#6
stusT5 850 t5 and r owner Last Online: Aug 21st, 2014 07:28 Join Date: May 2007 Location: epsom View Photos By: stusT5	You will need a boost gauge i have a psi one from ebay 20 quid run the pipe throug the bulk head and attach to the vacume tree by your throtle, wind the mbc wayyyyyy open and adjust half a turn at a time going down the road. make sure the mbc is wound open before starting or you might not have an engine to play with for very long.

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