wild willy

Full Member
Aug 4, 2003
2,323
0
Wales
I did the dual air feed mod to an unmolested Dynatwist on the weekend but only managed 192 g/sec:confused:. Hopefully better results to come when i modify the housing. i need to beat 218g/sec to maintain the same performance as my jetex open cone. It was warm though.
 
Feb 27, 2007
1,261
0
Behind Wilko
Disapointing results Carl :(

I don't know how we managed between 210-220 with unmolested housings. All seem to be different but like you say... Temps make a big difference.
 

jonathanp

Full Member
Jan 5, 2005
736
0
Coventry
I did the dual air feed mod to an unmolested Dynatwist on the weekend but only managed 192 g/sec:confused:. Hopefully better results to come when i modify the housing. i need to beat 218g/sec to maintain the same performance as my jetex open cone. It was warm though.

your using the larger maf housing though aren't you? so how would you convert that to if you were using the 3" maf?
 

daz463

Guest

+2 :D

i hope they will be anyway, it seems to be worth the effort tho, got some good comments off people even tho it does look fairly standard compared to yours and Nicks!

Hoping to make it the nationals, tho i am spose to be moving house on the 17th so not sure how to work both together, :think: be interesting, really should get my priorities in order......................so i'll see you there then :lol:
 
Feb 27, 2007
1,261
0
Behind Wilko
your using the larger maf housing though aren't you? so how would you convert that to if you were using the 3" maf?

i think the bigger MAF housing is less rescrictive so needs to be bigger to run standard figures. i ran 219 with a standard MAF than 220 with the larger ali MAF housing...both on the same sensor.

Hadn't you and Nick drilled holes in the end of yours though Aaron??

i cant remember what figures i ran before drilling those holes ED, i didnt label the logs well enough :doh:
 

wild willy

Full Member
Aug 4, 2003
2,323
0
Wales
your using the larger maf housing though aren't you? so how would you convert that to if you were using the 3" maf?
I'm trying to keep a low profile in another persons ride thread so i'll only comment on mods relevant to Probees car too.
Sorry Probee. Johnathon... i'll start my own dodgy ride thread soon. :redface:
 
Feb 27, 2007
1,261
0
Behind Wilko
I'm trying to keep a low profile in another persons ride thread so i'll only comment on mods relevant to Probees car too.
Sorry Probee. Johnathon... i'll start my own dodgy ride thread soon. :redface:

im lost but no worries buddy :)

you do need a thread, i want to keep up with your tinkering...
 
Feb 27, 2007
1,261
0
Behind Wilko
without WMI and running timing 6 boost 9 on a new filter and boost pipework the car seems to be flying but the flows gone back to how it was.

i tried swapping back to the old filter and the flow went back to 235gs, i think the old filter has had it (to much blowing out with an airline :)) so will not be using it.

heres some logs with the new filter. it feels very good on boost but is in desperate need of meth, its hot out there

Code:
Wednesday	1	July	2009	20:47:19						
1ML 906 032 A  		1.8l R4/5VT      01 0001								

	Group A:	'002				Group B:	'115			
		RPM	Load	Inj. On Time	Mass Flow		RPM	Load	Absolute Pres.	Absolute Pres.
	TIME					TIME				
MARKER	STAMP	 /min	%	 ms	 g/s	STAMP	 /min	%	 mbar	 mbar
	15.74	3840	88	7.48	69.69	16.16	4000	111.3	1760	1380
	16.56	4120	124.1	9.86	103.08	16.96	4320	153.4	2260	1930
	17.36	4560	191.7	15.98	175.69	17.76	4800	191.7	2490	2440
	18.16	5080	191.7	17.34	192.36	18.58	5320	191.7	2450	2370
	18.98	5520	191.7	16.32	207.33	19.38	5720	191.7	2380	2280
	19.78	5920	187.2	15.98	212.61	20.18	6080	180.5	2320	2300
	20.58	6240	178.9	15.3	217.72	20.98	6440	176.7	2280	2230
	21.39	6560	175.9	14.96	220.25	21.79	6680	166.9	1000	2230
	22.19	6160	12	1.36	0	22.59	5240	13.5	1000	1190

	97.83	3600	24.8	2.38	18.08	98.23	3600	28.6	1000	1030
	98.63	3680	64.7	6.46	55.75	99.03	3760	107.5	2420	1400
	99.43	3960	176.7	15.64	174.58	99.83	4280	191.7	2550	2540
	100.24	4560	191.7	18.7	184.33	100.64	4800	191.7	2500	2500
	101.04	5040	191.7	17	194.17	101.44	5240	191.7	2450	2370
	101.84	5440	191.7	17	203.94	102.24	5680	191.7	2390	2360
	102.64	5880	191.7	16.66	212.94	103.04	6040	187.2	2320	2240
	103.46	6240	178.9	15.3	219.39	103.86	6400	174.4	2270	2240
	104.26	6560	171.4	14.62	219.39	104.67	6720	175.2	2270	2200
	105.07	6640	19.5	1.36	0	105.46	5400	118.8	2310	1470
	105.87	5440	187.2	17	209.58	106.27	5560	191	2400	2350

Code:
Wednesday	1	July	2009	20:52:14						
1ML 906 032 A  		1.8l R4/5VT      01 0001								

	Group A:	'003				Group B:	'118			
		RPM	Mass Flow	Load	Ign. Timing		RPM	Temperature	Load	Absolute Pres.
	TIME					TIME				
MARKER	STAMP	 /min	 g/s	%	 °BTDC	STAMP	 /min	°C	%	 mbar
	14.87	3320	37.44	19.2	34.5	14.47	3240	39	0	1230
	15.67	3520	42.67	20.4	32.3	15.27	3400	38	0	1290
	16.47	3760	75.81	54.9	29.3	16.07	3600	37	0	1350
	17.27	4200	194.33	100	6.8	16.87	3960	37	95.3	1860
	18.09	4800	185.97	100	6.8	17.69	4520	39	89.8	2540
	18.89	5280	203.22	100	6	18.49	5040	38	90.6	2410
	19.69	5720	211.92	100	7.5	19.29	5480	39	91	2340
	20.5	6080	219.47	100	9.8	20.1	5880	39	94.1	2290
	21.3	6400	221.92	99.6	10.5	20.9	6240	41	95.3	2260
 
Last edited:

wild willy

Full Member
Aug 4, 2003
2,323
0
Wales
Hope you get your rods sorted soon.

Well after following your advice i modded my dynatwist housing and my g/sec increased to 208.........not bad. This is with my oversized maff housing and got me 1.4 bar at red line. So i wondered what this equalled in normal LCR maff language so i cleaned up my spare maff and put it in a stock housing and relogged, 225 g/sec was reached but the performance wasn't quite as good. Only managed 1.35 bar at red line.
The oversized maff tube clearly under reads but flows better indicated by the increased boost generated, helped not only from its increased csa but also being descreened.

A few more combinations to try, but as you say it bloody hot out there.
 
Feb 27, 2007
1,261
0
Behind Wilko
something that john (wilko) said about pressure drop got me thinking.... i would say it has made a reasonably big difference in responsiveness.

i think you can see in the logs it is boosting better?
 
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