How to fit and adjust a MBC - Page 4

TonyS9 · Nov 23rd, 2014, 13:04

Just don't overcook it, the standard turbo and manifold can't really take this level of boost without a cooling period. No top speed tests, stuff will crack! Also make sure all the manifold bolts are good, especially the hard to access manifold bottom bracket and the clutch housing hoop.

My 13c does 60 in 7.5s at 11psi. It is non-ac which helps keep the weight down.

barkster1971 · Nov 23rd, 2014, 21:42

The 13c hotside can get cracked and it's thrust bearing doesn't like too much boost. A 15g turbo at 10psi beats a 13c at 14psi too

bmxJeff · Dec 3rd, 2014, 19:32

Quote:

Originally Posted by jonnyf90

I have a 97 940 LPT Saloon and WHAT A DIFFERENCE an MBC has made. This thread is definitely one of the best.
Currently running at 13psi, no problems and no fuel cut issues. MPG is down a tad, but hey!

As a result, the beast is good for 60 in under 8 seconds, and is still going strong after 2 mpm

A word of advice for others who are going to do this. If you have a LPT, you can tap into the recirc pipe from the turbo to the intake manifold for your boost gauge, rather than opening up a blanked port on the manifold.
I'll post a pic when I get home, as I'm currently at work.

Cheers

I'm glad I have the LPT so I get the real contrast in performance. I'm excited like a kid on xmas eve just thinking about it!

I also mess with mk2 Golfs and the BHP gain per $ is a joke compared to these 940s. They do go whip round corners a little more efficiently just not sideways enough.

I'd like to see the pic if it's not too much trouble.

Cheers

bmxJeff · Dec 4th, 2014, 17:41

Ok, so had a look under the bonnet to eye up the situation and buy some bits and ran into a few things unexpected.

All of the ports on my inlet manifold are in use - have vacuums leading somewhere - I have no boost gauge at present. Obviously I can just tap a pipe with a t-piece but I'm confused when I hear the LPT should have blanked/spare ports.

Then the turbo to actuator pipe is a little different. Rather than a pipe running directly from the turbo to the actuator, pipes run from both these positions to something in front of the airbox which looks a bit like another actuator or vacuum operated switch of some kind which has a third pipe leading to god knows where and an electronic plug on the side.

EDIT

This is what I was talking about:

I'm now discovering this is a solenoid valve for electronically controlled boost as part of a turbo+ system fitted to some 940's. I had heard of this system but did not think it would come on LPTs. I'm going to have to do more research before I go any further.

doingitsideways · Dec 5th, 2014, 00:04

Has your airbox got Turbo written on it??

Certainly sounds like the Turbo+ system as fitted to the 190bhp Sports!

jonnyf90 · Dec 5th, 2014, 11:00

Quote:

Originally Posted by bmxJeff

I'm glad I have the LPT so I get the real contrast in performance. I'm excited like a kid on xmas eve just thinking about it!

I also mess with mk2 Golfs and the BHP gain per $ is a joke compared to these 940s. They do go whip round corners a little more efficiently just not sideways enough.

I'd like to see the pic if it's not too much trouble.

Cheers

Sorry about the delay! Here's the photo.
The clear pipe runs around the engine bay and through a grommet on the passengers side firewall through to under the glove box, and through to my boost gauge.
Hope this helps!

Volvanman · Dec 5th, 2014, 17:11

That's exactly where I tee'd mine - but I ran my pipe through some flexible plastic pipe conveniently installed at the Volvo factory but unused until now...

I bought my boost gauge off Fleabay, and whilst it was great during the day, I had to cover it at night as the illumination was so bright it blinded you in the dark! I have today solved this by inserting a second sliding brightness adjuster in a blank space to the left of the steering wheel (adjacent to the one that adjusts the brightness of the dash lights), and wired the boost gauge light through it, so now it can be dimmed or even turned completely off - which has made a big difference!!

nomoreVW · Dec 7th, 2014, 20:13

Just read this thread having signed up yesterday (saturday) and I'm wondering if this mod can be done on my 2 litre turbo Wentworth, '94 0n an M plate. I have read a lot of threads here and still don't know if I'm running an LPT or an HPT and how many horses are lurking under the magnificent span of metal known to some as the bonnet. Certainly on a couple of occaisions since I bought it (3 weeks back), I have had to floor the pedal joining dual carriageways and seems to get up to speed (60ish) quite quickly. I;m guessing it's the LPT with 155?hp, I dunno.....
Ta in advance for any replies.

baggy798 · Dec 7th, 2014, 20:50

All 2.0 turbos are HPT ~ 155bhp.

LPT's started appearing 96' onwards.

DogTaxi · Jan 25th, 2015, 15:11

Forgive my ignorance but I've never modified a turbocharged car before, Mine is a late 1990, 740 Intercooler Turbo, I have no idea what turbo its fitted with or if the engine has the 13mm con rods...

B230FT, with AW Automatic transmission. The trans shouldn't have an issue with the extra power should it?

Cheers
Cheza

Nov 23rd, 2014, 21:42	#32
barkster1971 VOC Member Last Online: Yesterday 13:22 Join Date: Jun 2009 Location: Swineshead/Salford	crack The 13c hotside can get cracked and it's thrust bearing doesn't like too much boost. A 15g turbo at 10psi beats a 13c at 14psi too __________________ new engine! new car!

Dec 4th, 2014, 17:41	#34
bmxJeff Road fodder... Last Online: Feb 25th, 2019 15:20 Join Date: Oct 2013 Location: Southampton	Ok, so had a look under the bonnet to eye up the situation and buy some bits and ran into a few things unexpected. All of the ports on my inlet manifold are in use - have vacuums leading somewhere - I have no boost gauge at present. Obviously I can just tap a pipe with a t-piece but I'm confused when I hear the LPT should have blanked/spare ports. Then the turbo to actuator pipe is a little different. Rather than a pipe running directly from the turbo to the actuator, pipes run from both these positions to something in front of the airbox which looks a bit like another actuator or vacuum operated switch of some kind which has a third pipe leading to god knows where and an electronic plug on the side. EDIT This is what I was talking about: I'm now discovering this is a solenoid valve for electronically controlled boost as part of a turbo+ system fitted to some 940's. I had heard of this system but did not think it would come on LPTs. I'm going to have to do more research before I go any further. __________________ Last edited by bmxJeff; Dec 4th, 2014 at 18:37.

Dec 5th, 2014, 00:04	#35
doingitsideways The Daddy Last Online: Feb 29th, 2024 15:07 Join Date: May 2010 Location: Manchester	Has your airbox got Turbo written on it?? Certainly sounds like the Turbo+ system as fitted to the 190bhp Sports! __________________ XC90 V8 Exec, C70 2.4T Convertible, S70 T5 CD, 850 TDI, 2 x Escort vans and a 2.8i Capri. Clearout has begun, but must continue!

Dec 5th, 2014, 17:11	#37
Volvanman Slewmeister... Last Online: May 15th, 2019 15:30 Join Date: Dec 2013 Location: Market Rasen	That's exactly where I tee'd mine - but I ran my pipe through some flexible plastic pipe conveniently installed at the Volvo factory but unused until now... I bought my boost gauge off Fleabay, and whilst it was great during the day, I had to cover it at night as the illumination was so bright it blinded you in the dark! I have today solved this by inserting a second sliding brightness adjuster in a blank space to the left of the steering wheel (adjacent to the one that adjusts the brightness of the dash lights), and wired the boost gauge light through it, so now it can be dimmed or even turned completely off - which has made a big difference!! __________________ Regards - Jerry 97 940 HPT, 25mm H&R spacers, Tethys alloys - 225/45 rear & 215/45 front, slotted discs all round & EBC Yellowstuff pads, MBC @ 14psi, 19t, blue injectors, 3" turbo back single silencer system... 96 960 3.0 Auto

Dec 7th, 2014, 20:13	#38
nomoreVW New Member Last Online: Aug 20th, 2018 15:43 Join Date: Dec 2014 Location: Pulborough	940 Wentworth Just read this thread having signed up yesterday (saturday) and I'm wondering if this mod can be done on my 2 litre turbo Wentworth, '94 0n an M plate. I have read a lot of threads here and still don't know if I'm running an LPT or an HPT and how many horses are lurking under the magnificent span of metal known to some as the bonnet. Certainly on a couple of occaisions since I bought it (3 weeks back), I have had to floor the pedal joining dual carriageways and seems to get up to speed (60ish) quite quickly. I;m guessing it's the LPT with 155?hp, I dunno..... Ta in advance for any replies.

Nov 23rd, 2014, 13:04	#31
TonyS9 Premier Member Last Online: Apr 9th, 2024 21:44 Join Date: Jul 2009 Location: Holywood	Just don't overcook it, the standard turbo and manifold can't really take this level of boost without a cooling period. No top speed tests, stuff will crack! Also make sure all the manifold bolts are good, especially the hard to access manifold bottom bracket and the clutch housing hoop. My 13c does 60 in 7.5s at 11psi. It is non-ac which helps keep the weight down.

Dec 7th, 2014, 20:50	#39
baggy798 🤍💙💗 Last Online: Today 03:08 Join Date: Mar 2006 Location: Lichfield	All 2.0 turbos are HPT ~ 155bhp. LPT's started appearing 96' onwards.

Jan 25th, 2015, 15:11	#40
DogTaxi New Member Last Online: Apr 24th, 2021 21:11 Join Date: Jan 2015 Location: Northamptonshire	Forgive my ignorance but I've never modified a turbocharged car before, Mine is a late 1990, 740 Intercooler Turbo, I have no idea what turbo its fitted with or if the engine has the 13mm con rods... B230FT, with AW Automatic transmission. The trans shouldn't have an issue with the extra power should it? Cheers Cheza __________________ When you park it and as you're walking away you don't turn to look at it, you have bought the wrong car.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)