-
Guest, 🚨New Stock alert: Premium CUPRA valve caps now available in the store 👉 Order now from the merchandise store
jamiebennett81
Guest
Ok I am at a bit of a loose end now
They said that the other option is to fit a manual boost controller as the software is set to a limit which cant be exceeded and the boost controller would enable the limit to be reached i.e. 290bhp and 300lbft
Of course the other one as they stated is to fit the ECS race valve
This however they said could not be supplied by BDMS, but I have just called
TTS roadsport and they can supply this for £69.99 apparently
is the right valve?
I can't remember exactly but there are a couple of different letters for the N75 valve i.e. H or J, and one of them gives a more aggressive type boost
can anyone clear this up please?
They need to specifiy what N75 to use to map it to that ideally, pointless spending 70 quid on a N75 if they have difficulty mapping with it.
The mbc will just give you adjustable boost really, the software hasnt got a power limit i.e 290bhp etc.., it will have a deviation over and below a specified boost amoungst other factors.
Just wait it it, ask them what they want and get that. Theyre mapping it at the end ofthe day, so if you get what they ask for its their fault if the results dont come back what you want.
The mbc will just give you adjustable boost really, the software hasnt got a power limit i.e 290bhp etc.., it will have a deviation over and below a specified boost amoungst other factors.
Just wait it it, ask them what they want and get that. Theyre mapping it at the end ofthe day, so if you get what they ask for its their fault if the results dont come back what you want.
jamiebennett81
Guest
well I am going to see if I can pick up the car tomorrow, to say I am some what miffed that it cannot reach peak power due to a mechanical component being the bottle neck and I can't find out exactly the exact valve I need to get is annoying
to be continued.........
![[:@]](/forums/styles/seatcupra/oldforumsmileys/furious.gif "Furious [:@]")
MBC it, mine was set up with one, then I switched to the electronic Apexi AVC-R. The N75 was never used at all in setting mine up. These other N75's can be very 'spikey' and difficult to control. i'm sure Jim used the Forge MBC: http://www.forgemotorsport.co.uk/content.asp?inc=product&cat=0016&product=FMUNOS
Can't believe BDMS won't sell you the ECS N75 to finish your car - doesn't make sense???
Can't believe BDMS won't sell you the ECS N75 to finish your car - doesn't make sense???
Last edited:
I was hoping it would all be sorted for you today bud
. I'm not doubting what your saying ain't true but that in my opinion is not right. Many BT conversions with your valve setup (N75F probably) have been successfully comissioned so your current spec valve shouldn't be a problem. The ECS valve if my memory serves me correct is a N75C or H version which basically allows more boost to build before operating the actuator. The custom mapping should be able to adjust the duty of your standard valve to match.I would be tempted to run a good quality manual boost controller in its place, something like the Forge unit.
We have recommended a MBC too.
The software is now running 1.38bar, but we are only seeing 1.1 bar of boost.
To be honest, haven't been overly impressed by the ATP kit. Even down to the very soft 90 degree elbows that are supplied to make the intake hose....very prone to collapsing
The software is now running 1.38bar, but we are only seeing 1.1 bar of boost.
To be honest, haven't been overly impressed by the ATP kit. Even down to the very soft 90 degree elbows that are supplied to make the intake hose....very prone to collapsing
Some say the ECS race n75 is an n75 h valve but nobody 100% knows. I must say they seem pretty similar!
Did they say how the n75 is limiting the boost. Surely if its custom mapped they should be able to fully control it unless its faulty. Most people have had to fit mbc to stop boost spikes not to make more.
Did they say how the n75 is limiting the boost. Surely if its custom mapped they should be able to fully control it unless its faulty. Most people have had to fit mbc to stop boost spikes not to make more.
Also whats did CR turbos do to the actuator. This hasnt had a negative effect on the boost has it?
Your in safe hands with the mapping if Ptorque are doing it. Will, connect a bike pump with a gauge directly to the actuator and check how much psi it takes to start the movement. If its less than 12 psi it ain't going to allow the turbo to spool long enough to reach your requested values. 1.38 bar requested at Red line should get you near 290bhp . I bet CR turbo's haven't adjusted the actuator properly.
Can you richen the mixture at Redline to lower egt's to break into the 300bhp
zone.
. I bet CR turbo's haven't adjusted the actuator properly.Can you richen the mixture at Redline to lower egt's to break into the 300bhp
zone.
jamiebennett81
Guest
I was hoping it would all be sorted for you today bud
I would be tempted to run a good quality manual boost controller in its place, something like the Forge unit.
It is sorted, as in the car is running very well, but it's not achieving those "ideal" or pub bhp type figures, so you know when you have a certain vision in your mind and it does not turn out quite the way you wanted it to be
but it just needs a Forge MBC to fix the issue as the N75 cannot hold the boost
We have recommended a MBC too.
The software is now running 1.38bar, but we are only seeing 1.1 bar of boost.
To be honest, haven't been overly impressed by the ATP kit. Even down to the very soft 90 degree elbows that are supplied to make the intake hose....very prone to collapsing
Will - not having a pop at all mate, you have done a fantastic job so far, as you say of a kit that was not a great fit in the first place so what you have managed to do is fantastic so far, great level of service and have been more than helpful with talking through each of the stages and the issues raised during the conversion
I cant wait to drive the car, but you know how it is, as mentioned above, you have a set figure in your mind and then it comes out a little low or not as expected, it has disheartened me a bit. I am sure the manual or electronic boost controller will resolve the issue
I spoke to Alex at Backdraft motorsport and he said he had a similar issue and now runs a Forge MBC and it works a treat and allowed the boost to be held all the way to the redline
again, great service. Sorry if i sounded a bit miffed on the phone earlier, but it was just the initial disappointment, but as I am sure you know, these things can never be straight forward sometimes.....
Your in safe hands with the mapping if Ptorque are doing it. Will, connect a bike pump with a gauge directly to the actuator and check how much psi it takes to start the movement. If its less than 12 psi it ain't going to allow the turbo to spool long enough to reach your requested values. 1.38 bar requested at Red line should get you near 290bhp
Can you richen the mixture at Redline to lower egt's to break into the 300bhp
I believe the Actuator is in the correct position, but then that is a pretty loose statement when I dont have a direct comparison to be honest
What do you mean Bill?I am going to ring a few other people tomorrow and get some quotes and opinions on the manual and electronic BC and see which is the best route and get one ordered asap....the MBC being the easiest to fit of course
MBC is alot cheaper and simple to fit m8. The big difference is the electronic one can be adjusted sitting in the drivers seat and pressing buttons, but is alot easier to adjust the pressure and is accurate. The MBC has no adjustment gauge as to how much you're changing it by - you have to drive, watch the boost gauge, go back under the bonnet, adjust, watch, adjust, watch, etc. until it's what you want. EBC is just sitting pressing buttons, adjust it on the move too. MBC is around £70 - EBC more like £250.
jamiebennett81
Guest
cheers Rob
yeah I was thinking about that, its cheaper but more of a pain to setup as in and out of the car turning it up or down to get the required boost etc
I will speak to a few people for quotes to supply and fit the EBC kit, as I like the thought of the in car adjustability for boost/settings etc
Greddy Profec B Spec 2 for me, quality piece of kit.
But the Apexi AVC-R is the one to go for imo.
But the Apexi AVC-R is the one to go for imo.
jamiebennett81
Guest
cheers Phil, I think I will look at purchasing either of these tomorrow
the Greddy one does look a little easier to setup though, but for an extra £20-30, I might as well get the Apexi one
How I set it up though will be another piece of fun.........
**EDIT** Rob how easy was yours to setup?
Last edited by a moderator:
My K04 hybrid was making 1 bar at red line at 100% Duty cycle, and i was well miffed. As i increased the tension on the actuator the boost increased and the duty cycle decreased. Now its running like 1.45bar at Red line @ 80% duty cycle. With a Hybrid its not been subjected to strict QA setup procedures (not manufacturing) when leaving the workshop. It is normal for a hybrid to do this until you increase the actuator prload(wind actuator nuts up bar to make actuator more firm to open). This is not an n75 issue.
The MBC is a good alternative if you don't want to fettle with the actuator as it is faster to react than the n75 valve. The down side is that part throttle driveability is quite on off but a correctly set up mbc can significantly reduce overboosting due to spiking. You will get spiking since you have a compressor heavy turbo.
Star wired it up, only 4 wires though, but setting up is easy, all you have to do is set the boost and adjust the wastegate duty cycle until the boost is bang on, as a guide mine was set to 1.4 BAR at 50% duty cycle - boost was bang on. The 3" inlet dropped the duty cycle quite a bit from the Forge TT inlet hose which is alot narrower - from 75% down to 50%, spooled up quicker too.
Similar threads
