Skorchio's LCR - 293 bhp 313 ft/lb - Stock K04 :)

[DPJ]

So the N75 is a basic electronic bost controler.

So questions, Dave have you had any problems with that manual boost controler saying there is a leak?

Does the engine not go mental with the N75 unpluged / not reading boost? or do you have to leave it in with the Manual?

The N75 is just a solenoid valve - that all ebc's have.

No - no leak because my mbc doesn't bleed boost! It has one pipe in and one pipe out. When it's closed, the boost pressure doesn't get past it. Whe it opens, the boost pressure acts on the actuator.

My N75 is still plugged in, so the ecu thinks it's controlling it.

 

[Skorchio]

so when the required boost is met it lets boost to act on the actutor? how does it regulate it? If its set to 20 psi it will open at 20 psi then surly it does not let 20 psi hit the actuator?

 

[Skorchio]

Re thinking about it, when its gets to 21 psi is it letting 1 psi on to the actuator?

 

[DPJ]

Re thinking about it, when its gets to 21 psi is it letting 1 psi on to the actuator?

No, when it gets to 20 psi - nothing to the actuator. When it gets to 21 psi, 21 psi to the actuator.

 

[probee]

are you having a blonde moment?

 

[jonathanp]

at just over 21psi the pressure pushes the ball bearing of its seat and allows the pressure to then start building up on the actuator which then starts to open slightly, the turbo slows down and pressure drops down to 21psi at which point the ball bearing goes back on its seat.

if you had it on time lapse you'ld probably see the ball bearing bouncing of its seat like a nutter as its constantly open the actuator and then closing it again

 

[wild willy]

I use This mbc from the same company.

I've tried both the Forge and Daves recommended mbc. The Forge is super quality but very progressive. The R spec one is crisper in operation and more finely tuned. For whatever reason the Forge unit starts to bleed boost almost straight away which for my purposes ain't good.
So thumbs up for the Rspec from me.

 

[wild willy]

Re thinking about it, when its gets to 21 psi is it letting 1 psi on to the actuator?

just to really mangle your head on this topic, i run the mbc in parallel with my n75 valve as i find it gives smoothest boost control. For all boost levels up to the requested map values the n75 takes care of, for all overboost matters the mbc kicks in and minises spikes which will kill not only your rods but your clutch too.
happy days.

 

[Skorchio]

No, when it gets to 20 psi - nothing to the actuator. When it gets to 21 psi, 21 psi to the actuator.

at just over 21psi the pressure pushes the ball bearing of its seat and allows the pressure to then start building up on the actuator which then starts to open slightly, the turbo slows down and pressure drops down to 21psi at which point the ball bearing goes back on its seat.

if you had it on time lapse you'ld probably see the ball bearing bouncing of its seat like a nutter as its constantly open the actuator and then closing it again

This all makes sence now, i just had an image in my head of 21 psi slamming in to the actuator, but really it builds up as its bleeds past the MBC, all be it extreamly fast.



Popped another boost hose on the way to Hayleys Might need to come and see you Aaron!

What you think we can boost at Aaron with a MBC at the red line? At the mo i think we are at 18/19 PSI / 1.3 bar

 

[Skorchio]

Nozzels came from BIll this morning, so should be able to have some fun at the weekend!!

Want to meet up Aaon so you can play with my pipes?

 

[jonathanp]

worth bearing in mind that as you push the boost higher the back pressure inside the turbo will open the actuator from the inside so you might struggle to see more than 20psi.

I can't get more than 18psi at the red line due to this and thats on a hybrid

 

[Skorchio]

Well i guess that may be happening now... Hm i need compaire logs from now to logs from before.

Ill do that when i get home and post up my findings!

 

[ibizacupra]

The N75 is just a solenoid valve - that all ebc's have.

No - no leak because my mbc doesn't bleed boost! It has one pipe in and one pipe out. When it's closed, the boost pressure doesn't get past it. Whe it opens, the boost pressure acts on the actuator.

My N75 is still plugged in, so the ecu thinks it's controlling it.

there has to be a small leak path else actuator will never close as the ball will act like a non return valve..

 

[jonathanp]

yup the pin size hole directly opposite the wastegate port. Shame you can't have a port there instead to feed it back in to the intake like the N75

 

[Skorchio]

Hmm i understand parts ill do some more reading, some pics from the weekend

 

[wild willy]

Nick you've given my LCR a complex.

 

[EL]

**** hot car mate thats all I have to say!!

 

[turbo009]

awesome car,nice clean engine bay

 

[Skorchio]

Nick you've given my LCR a complex.

Thanks for the other comments guys!

 

[Skorchio]

Went round to Aarons house on Sunday to borrow his pipe flaring tool as i could not boost without popping a pipe, Once flared it was pressure tested up to 28PSI and it all held tight.

I got my new Nozzles from bill so no better time to run the DOT3 DOT4 and Snow 175CC nozzle in to a measuring jug. They both mist very well and to the naked eye i would say there is nothing in it between them.

Here are the actual readings,

Dot 3 = 180 - 190 cc/min
DOt 4 = 240 - 260 cc/min
Snow 175 = 190-200 cc/min

I put the DOT4 on the car as the calculator Dave pointed me towards and Johns 15% of you fule cc/min sugested 175 was not enough. I set the start PSI to 17 and the Full PSI to 22 so i was using as little as possible.

Took the car down the road and it felt stronger than it ever has. No CF's on the first logs but after running all the other logs ran for CF's again with the oil temp at 105c, start psi at 15 and there where some there. People who track these cars must run low setting!

Also has a play with what i can only belive to be a remap golf GTI, very fast!

I seem to be under requested boost up till 5500 RMP then im allways over, so maybe a MBC will help!

Logged intake and EGTs as well, Both looked good for a 22c day

Logs

STAMP	 /min	 g/s	%	 °BTDC	STAMP	 CF	 CF	 CF	 CF
									
13.81	3840	130.86	97.3	13.5	13.41	0	0	0	0
14.61	4360	182.53	100	12	14.21	0	0	0	3
15.41	4880	188.28	100	15.8	15.01	0	0	0	3
16.22	5400	199.44	100	16.5	15.82	0	0	0	3
17.04	5800	205.25	100	17.3	16.62	0	0	0	2.3
17.82	6200	209.56	100	19.5	17.42	0	0	0	2.3
18.64	6560	209.89	99.6	19.5	18.22	0	0	0	2.3
									
33.92	3840	106.14	93.7	30.8	33.52	0	0	0	0
34.73	4360	186	100	9	34.32	0	0	0	0
35.53	4880	190.56	100	15.8	35.13	0	0	0	0
36.33	5400	200.22	100	16.5	35.93	0	0	0	0
37.13	5880	204.86	100	14.3	36.73	0	0	0	0
37.95	6240	209.56	99.6	18.8	37.55	0	0	0	0
38.75	6600	209.89	99.6	19.5	38.35	0	0	0	0
									
57.26	3680	46.97	18.4	25.5	56.86	0	0	0.8	0
58.06	3920	84.33	49.8	25.5	57.66	0	0	0.8	0
58.87	4360	187.06	100	9	58.46	0	0	0.8	0
59.67	4880	190.83	100	13.5	59.27	3	0	0.8	3
60.47	5400	202.42	100	16.5	60.07	3	0	0.8	3
61.27	5840	207.56	99.6	14.3	60.87	2.3	0	0	3
62.09	6240	210.89	99.6	18.8	61.69	2.3	0	0	2.3
62.89	6600	210.42	100	19.5	62.5	2.3	0	0	2.3
63.7	6880	211.92	85.9	6.8	63.29	1.5	0	0	1.5

		RPM	Temperature	Load	Absolute Pres.		Temperature	Load
	TIME					TIME		
MARKER	STAMP	 /min	°C	%	 mbar	STAMP	°C	%
	14.09	3720	27	87.8	1420	13.68	695	0
	14.89	4240	27	82.4	2540	14.49	710	0
	15.69	4800	24	83.9	2510	15.29	730	0
	16.49	5280	23	84.3	2400	16.09	760	0
	17.31	5720	23	86.7	2300	16.91	795	0
	18.11	6080	23	88.6	2260	17.72	825	0
	18.92	6440	24	89.4	2210	18.51	845	0
	19.72	6720	24	90.2	2210	19.32	870	0
								
	76.83	3600	27	21.2	1400	76.45	700	0
	77.65	4040	29	82.4	2450	77.25	715	0
	78.46	4640	25	82	2540	78.05	730	0
	79.26	5160	24	83.1	2400	78.86	755	0
	80.06	5720	24	84.7	2290	79.66	790	0
	80.86	6120	24	92.9	2190	80.46	820	0
	81.68	6480	24	90.6	2180	81.28	845	0
	82.48	6800	26	91	2160	82.08	865	0
	83.28	5880	22	0	1310	82.9	885	0
	84.1	4560	21	0	1080	83.7	905	0
	84.9	3480	21	0	1040	84.48	910	0
								
	93.74	3760	28	3.9	1340	93.34	610	0
	94.56	4160	29	95.3	1900	94.14	630	0
	95.36	4640	27	82	2540	94.96	660	0
	96.16	5120	25	83.9	2450	95.76	700	0
	96.96	5600	24	83.9	2360	96.56	750	0
	97.77	6000	25	86.3	2270	97.37	795	0
	98.59	6360	25	88.2	2210	98.17	830	0
	99.39	6680	26	89.8	2180	98.97	860	0
	100.19	6400	26	0	1700	99.79	885	0
	100.99	5040	21	0	1120	100.59	905	0
	101.79	5080	21	0	1050	101.39	920	0
	102.6	4680	22	0	1050	102.19	905	0

	Group A:	'002				Group B:	'115				Group C:	 Not Running	#VALUE!
		RPM	Load	Inj. On Time	Mass Flow		RPM	Load	Absolute Pres.	Absolute Pres.			#VALUE!
	TIME					TIME					TIME		0
MARKER	STAMP	 /min	%	 ms	 g/s	STAMP	 /min	%	 mbar	 mbar	STAMP		#VALUE!
	8.59	4240	191.7	19.04	181.25	8.99	4480	191.7	2470	2540	-70		67.27466667
	9.39	4760	191.7	18.02	187.75	9.79	5000	191.7	2450	2490	-40		71.47933333
	10.19	5240	191.7	17.34	202.31	10.59	5480	191.7	2400	2370	30		75.718
	11.01	5680	188.7	15.98	206.25	11.41	5880	190.2	2320	2280	40		75.63866667
	11.81	6080	181.2	15.3	208.89	12.21	6240	178.9	2260	2220	40		77.52
	12.61	6400	173.7	14.62	210.81	13.01	6560	166.9	2230	2220	10		77.97333333
	13.42	6720	167.7	14.62	212.94	13.82	6800	164.7	990	2210	-1220		81.872
													
	26.28	4560	191.7	18.36	179.81	26.7	4840	191.7	2450	2510	-60		69.768
	27.1	5080	191.7	17	195.47	27.5	5280	191.7	2400	2410	-10		71.96666667
	27.9	5560	191.7	16.32	202	28.3	5720	189.5	2340	2290	50		75.616
	28.7	5960	185.7	15.64	207.56	29.1	6160	183.5	2280	2240	40		77.67866667
	29.52	6320	173.7	14.62	211.58	29.92	6480	170.7	2240	2220	20		76.99866667
	30.32	6640	167.7	14.28	210.81	30.72	6760	168.4	2240	2200	40		79.016

Bit more playing with the start and full PSI dials to try and knock out the CF's and i think ill be ready for a Dyno.

Question @ everyone, how do you log? The more you log the hotter the engine gets, the worse the car runs... And logs are not real world senarios.

Also a question at you bigger turbo people, you flow more air and push in more fuel and run more power with no gain in CF's, is this all down to the fact you can flow more air at less pressure? Is it the boost thats amplifies CF's? Another question, if iv got 20 PSI in my inlet manifold, and so have you, how is more air going in to the engine when the valves open if your heads not ported?