can Jim not control the N75/Boost using the ECU?
Hopefully the MBC / Apexi won't just mean it runs rich.
Hopefully the MBC / Apexi won't just mean it runs rich.
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K03/04 - GT Bolt on 1.8T
- Thread starter ibizacupra
- Start date
lower boost in lower gears? Can't you just give it less throttle? Just seems an un-necessary item! 
Of course he can yes, he's one of the top tuners in the UK, he just wants more control over boost and the amount and way it's delivered through the gears for maximum traction, to be as efficient as possible. I fully agree with that approach.
Oh dear, here we go again. Jabbasport use adjustable boost controllers, EIP Tuning use the AVC-R, so why can't Star, no difference.
Oh dear, here we go again. Jabbasport use adjustable boost controllers, EIP Tuning use the AVC-R, so why can't Star, no difference.
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Jabba's one just plugs into the N75 control circuit.... so it's not the same Rob
I wasn't having a dig, just don't understand why he can't control the boost, but could if he wanted - get back down & settle.
the yanks stick big injectors on with enlarged maf housings & run stock code, so just because someone does it, doesn't mean it's right.
I wasn't having a dig, just don't understand why he can't control the boost, but could if he wanted - get back down & settle.
the yanks stick big injectors on with enlarged maf housings & run stock code, so just because someone does it, doesn't mean it's right.
Its good to have a manual boost controller to adjust the cars output to suit the driving conditions.
Excellent news rob on your turbo upgrade.
I've been looking into the elimniators recently as an upgrade path and are looking very promising.
The Quattro eliminator GT28rs is a direct replacement for the lcr but i think i would probably risk 320bhp before internals upgrade. Rob why not have the new ATP 3inch tip fitted instead of the forge, less restrictive. I think stock K04's will benefit from the new ATP Tip.
Excellent news rob on your turbo upgrade.
I've been looking into the elimniators recently as an upgrade path and are looking very promising.
The Quattro eliminator GT28rs is a direct replacement for the lcr but i think i would probably risk 320bhp before internals upgrade. Rob why not have the new ATP 3inch tip fitted instead of the forge, less restrictive. I think stock K04's will benefit from the new ATP Tip.
RobDon said:Hi Phil. Car is in right now being done. GT2X along with S3 injectors @ 4-BAR (to give around 440cc), S3 Forge/Samco intake hose, S3 MAF, ATP manifold etc. and a manual boost controller. Water pump failed during mapping, road tests, etc. so needs new pump, timing belt etc. but before the pump went it was making 281bhp and 309lbft at 20PSI. Fitting an Apexi AVC-R boost controller soon as most MBC's are a bit naff really. So it's all going well really (apart from the water pump!), should have it back next week. Definately alot better than a K04 that's for sure.
Jim is also doing a GTRS on another Leon just now too.
So have i got this right. S3 injectors @ 4 bar = 440cc
so i could use bosch greens @ 3 bar which are 440cc
This is for a GT2X, would that be ok, iam not prepared to pay £320 for S3 injectors.
cupra_matt said:
I don't think that you would require a 440cc capacity if your desired bhp was only 290bhp approx.
RobDon said:
how will you get a gear signal?
presume this is needed for a gear related boost control.
AVC-R picks up RPM and vehicle speed signals. You can drive along in five different gears and it will give you a ratio which you can save to tell it which gear is which. Then you can give it more or less "start duty" in each gear.
On the AWD big turbo cars it is nice to make sure you get full boost in 2nd gear without excessive spiking in top.
If you have six gears, best to setup 2-6 as your five gears, but if you want to limit wheelspin in 1st, I guess you could do that. It will work fine if you pair up a couple of gears.
Not sure how the VAG solenoids work, but if they are two port, then the AVC-R's solenoid is much better as it is three port. This means that it can completely block off the actuator from seeing any of the boost pressure signal. A two port setup has to bleed off a restricted pipe generally.
The actual boost control algorithm in the AVC-R is not that hot, self learn is useless and best left alone. But with the right settings it is the best boost controller I've come across. Makes a lot of the HKS and Blitz stuff seem very silly.
And a manual boost controller is right up there for quality of control. You can use them with external wastegates and they've been used on cars running 9 sec quarters with top speeds over 210 mph. Nothing wrong with them at all.
On the AWD big turbo cars it is nice to make sure you get full boost in 2nd gear without excessive spiking in top.
If you have six gears, best to setup 2-6 as your five gears, but if you want to limit wheelspin in 1st, I guess you could do that. It will work fine if you pair up a couple of gears.
Not sure how the VAG solenoids work, but if they are two port, then the AVC-R's solenoid is much better as it is three port. This means that it can completely block off the actuator from seeing any of the boost pressure signal. A two port setup has to bleed off a restricted pipe generally.
The actual boost control algorithm in the AVC-R is not that hot, self learn is useless and best left alone. But with the right settings it is the best boost controller I've come across. Makes a lot of the HKS and Blitz stuff seem very silly.
And a manual boost controller is right up there for quality of control. You can use them with external wastegates and they've been used on cars running 9 sec quarters with top speeds over 210 mph. Nothing wrong with them at all.
I am wondering tho how the request vs actual side of life will be vs limp mode if the bosch ecu see's a <>200mb deviation and throws a wobbly into soft limp.
I am considering something along these lines myself to help get me off the line without rediculous wheelspin (thats or some sort of decent TCS)
I am considering something along these lines myself to help get me off the line without rediculous wheelspin (thats or some sort of decent TCS)
Why not just feed the ECU a boost signal it wants to see? - ie clamp it.
Does it go wobbly over high airflow signals as well?
Does it go wobbly over high airflow signals as well?
ibizacupra said:
soft limp (5 psi) wont happen if N75 is bypassed as there will be no device to force all the boost pressure to wastegate, just gotta make sure the car is mapped to fuel correctly at the highest pressure the BCV runs at.
Is there such a thing as hard limp on the 1.8T ECU? i.e. reduces all the fuelling so it doen't create any boost at all?
Presumably it could close the throttle or limit the revs if it wanted to even if it doesn't have wastegate solenoid control?
john banks said:
does'nt seem too fussed on airflows, but MAP sensor deviations it struggles with. not just a max thing tho just more or less than its asking for at any one time and it can throw a tantrum
So you mean if you were pulling up a hill on 25% throttle and the ECU requested 0.2 bar boost and it got more or less it would limp? That indeed would be tricky.
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