hs4 tuning

Post by **daniel garry** » Sun May 04, 2014 8:15 pm

well lads, iv just fitted a stage 1 kit i got from minispares to the 998, freeflow manifold, RC40, alloy inlet and AAU needle. couldnt get the car started so started playing with the mixture a bit and got a little splutter and now i'v finally got it running, with the mixture nut down 9 full turns from the top! from all the info iv found online that seems like an awful way down!
surely this is way off??
anyone got any tips on tuning the hs4 so i can have it drive-able til i get it to someone who can set it all up properly?? would the likes of mcnamaras in dublin or westward in enfield be any use to me?
cheer lads

Post by **molly the mini** » Mon May 05, 2014 9:35 am

This should do the trick for ya I use it a lot and find it very good
http://pages.ebay.com/link/?nav=item.vi ... 23&alt=web

Post by **woody** » Mon May 05, 2014 1:41 pm

The colourtune is good for fine tuning but like you said you are way off.
Are we talking about a hot or cold engine, if its cold make sure the choke is working properly as this would do the same job as turning the mixture right up. If its a warm engine It sounds like the needle is too far down the jet, when you fitted it did you put the collar level with the bottom of the dashpot. Maybe it wasn't tight and has sliped down.

Post by **daniel garry** » Mon May 05, 2014 4:18 pm

have a colour tune here so thats grand but the fact i had to turn the adjusting nut so far has me a bit confused!
cold engine woody, pretty sure the needle collar hasnt slipped down but il check n get back to ye. the only thing iv done with the choke is put the cable back on the arm, was grand before so didnt alter it

Post by **woody** » Mon May 05, 2014 5:59 pm

air leak? will need more fuel

Post by **daniel garry** » Mon May 05, 2014 6:41 pm

woody wrote:air leak? will need more fuel

checked a few times, no air leaks! It started up from cold and ran with choke for a couple of mins so i started winding the mixture nut in a bit and the revs picked up and now ot'l stwrt from cold at say 2 turns leaner but thats still 7 from the top!

Post by **keith** » Wed May 07, 2014 12:23 pm

just check that when you replaced the needle it was set flush with the bottom of the piston.

Post by **daniel garry** » Wed May 07, 2014 5:07 pm

keith wrote:just check that when you replaced the needle it was set flush with the bottom of the piston.

took it out again and spotted a small crack on the collar so swapped it with another 1 and refitted all again and brought the adjusting nut back to the top and down 15 flats and it starts! there was a bit of petrol comming out the overflow so i swapped over the needle valve from another carb and thats solved it for now
it idles ok on choke but konks when the choke is in but sounds good to me when its running with throttle, opinions?
choke and throttle
th_WP_20140507_0011_zpsb965a044.jpg
revs with no choke
th_WP_20140507_0031_zps041bfaa3.jpg
just choke
th_WP_20140507_0021_zps3abe3969.jpg
its booked in at mcnamaras for friday morning so if i can have it driveable for the trip to dublin id b happy!

Post by **daniel garry** » Sun May 11, 2014 11:38 am

well its not good! collected the car friday evening, 100 quid lighter and its not running right! the only time there isnt a flat spot is above 3500 rpm with the throttle wide open! so il be calling back in on monday morning!
should the AAU needle need much profiling or more or less a direct swap and tune up??

Post by **keith** » Sun May 11, 2014 1:05 pm

how can they charge €100 and *not* fix it???

imho you have an air-leak,,, if you are passing, feel free to drop in. txt me first. - i fitted that exact kit a few years back.. ran like a dream. 60+mpg and nippy.

Post by **woody** » Sun May 11, 2014 1:21 pm

Did you do any changes with the air filter?
Can you post a photo of the carb area.

Post by **daniel garry** » Sun May 11, 2014 1:30 pm

keith wrote:how can they charge €100 and *not* fix it???

imho you have an air-leak,,, if you are passing, feel free to drop in. txt me first. - i fitted that exact kit a few years back.. ran like a dream. 60+mpg and nippy.

exactly, il be going back to em tomorrow!
funny enough me and the girlfriend are just heading to dunlaoighaire in 5 mins! would you happen to b around today or tomorrow keith?

woody wrote:Did you do any changes with the air filter?
Can you post a photo of the carb area.

its just a replacement K&N in the standard airbox
il get pics up in the next little while

Post by **keith** » Sun May 11, 2014 2:57 pm

im here today.. pm sent. includes my phone number!

Post by **keith** » Sun May 11, 2014 7:45 pm

had a good look at that today when Dan popped over.
no apparent air leak.
removed and plugged breather hose which was perished.
checked timing with vacuum disconnected - correct @6 degrees btdc
checked fuel mix with colourtune found it to be slightly lean but more importantly would not richen-up under full throttle, causing flat spot.
replaced dashpot oil with 20W/50 - still no richening-up under acceleration - damper, piston, spring, needle, jet all correct.

really looks like a fueling problem - car idles and runs ok apparently, but bogs down under load.

i would try a different dashpot damper first then maybe a different carb.

Post by **daniel garry** » Sun May 11, 2014 8:04 pm

cheers keith, thanks for helpin out!
been doing a bit of driving since, its slightly better than it was but still has that flat spot, going to call mcnamaras in the morning and see what they say and then start changing bits when im home tomorrow afternoon
all suggestions welcome!

Post by **daniel garry** » Mon May 12, 2014 3:45 pm

well i got to mcnamaras this morning and told em whats wrong and they went at the car again and tried an aav needle, it made a difference to the low down lack of power but its now acting strange in 4th! just wont pick up in 4th! the guys at mcnamaras are suggesting a carb rebuild
for some reason im feeling like i need to do a compression test on the engine!

Post by **davemk4** » Mon May 12, 2014 6:36 pm

The AAV is just like the AAC needle
I have the AAU with my car and it's great..

Have you got a co% meter?
The colour tune is only good at idle not good when the
Car is under load...

Have you checked your timing?
Dave

Post by **daniel garry** » Mon May 12, 2014 8:32 pm

davemk4 wrote:The AAV is just like the AAC needle
I have the AAU with my car and it's great..

Have you got a co% meter?
The colour tune is only good at idle not good when the
Car is under load...

Have you checked your timing?
Dave

havnt got a co meter
the timing is at 5 or 6 degrees btdc

Post by **davemk4** » Mon May 12, 2014 9:38 pm

daniel garry wrote:
davemk4 wrote:The AAV is just like the AAC needle
I have the AAU with my car and it's great..

Have you got a co% meter?
The colour tune is only good at idle not good when the
Car is under load...

Have you checked your timing?
Dave

havnt got a co meter
the timing is at 5 or 6 degrees btdc

Have u the vac disconnected?

Post by **daniel garry** » Mon May 12, 2014 10:52 pm

davemk4 wrote:
daniel garry wrote:
davemk4 wrote:The AAV is just like the AAC needle
I have the AAU with my car and it's great..

Have you got a co% meter?
The colour tune is only good at idle not good when the
Car is under load...

Have you checked your timing?
Dave

havnt got a co meter
the timing is at 5 or 6 degrees btdc
Have u the vac disconnected?

it was disconnected and plugged for checking with the strobe and then all put back

Post by **davemk4** » Mon May 12, 2014 10:56 pm

What way r the plugs after a spin?

Post by **daniel garry** » Mon May 12, 2014 11:27 pm

davemk4 wrote:What way r the plugs after a spin?

il whip em out in the morning and have a look, the plugs are only 250 mile old so it'l b easy enough to see the colour of em

Post by **keith** » Tue May 13, 2014 5:22 pm

before you go for the full carb rebuild, try the dashpot, piston & spring from another HS4

Post by **daniel garry** » Tue May 13, 2014 5:37 pm

keith wrote:before you go for the full carb rebuild, try the dashpot, piston & spring from another HS4

i will be! i think they were just wanting rid of the mini to be honest!

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