B3 Coupe

Posted: Wed Dec 09, 2009 8:57 pm

My post on this light verses heavy flywheel does suggest I have facts here which I do not , it was just a theory based on weight and momentum of a heavier spinning wheel or disc.
This is where my theory stopped giving it no more thought, so a half baked theory if that.
My apalogies for this and wish my mega error be forgiven Tony on the grounds that I can't find a better excuse other than it was quite late in the day when I posted Embarassed

Posted: Wed Dec 09, 2009 9:22 pm

My post on this light verses heavy flywheel does suggest I have facts here which I do not , it was just a theory based on weight and momentum of a heavier spinning wheel or disc.
This is where my theory stopped giving it no more thought, so a half baked theory if that.
My apalogies for this and wish my mega error be forgiven Tony on the grounds that I can't find a better excuse other than it was quite late in the day when I posted Embarassed

Posted: Wed Dec 09, 2009 9:37 pm

I return with a true fact this time:D This thread is very interesting and informative Cool

With the intended humour thrown, it's probably best you do what I do and avoid reading my posts to keep it this way Laughing

Posted: Wed Dec 09, 2009 9:50 pm

Nice one Tony but I felt they were needed regardless Smile

Bugger! why didn't I use the age line Confused

It's a much better get out clause Laughing

Posted: Wed Dec 09, 2009 10:01 pm

i just made it all up Wink

Posted: Thu Dec 10, 2009 2:08 am

I dont think it is something I would take the engine or gearbox out for, however if you are doing a clutch then it may make sense.

Stock 7a is about 11kg, most folk seem to lighten them to 7kg-ish.

There is a thread on s2 forum of piks of lightened 7a/3b flywheels as well as a load of discussion threads.

Head looks nice, bet you cant wait to get your hands on it!

Posted: Thu Dec 10, 2009 1:34 pm

yeah

Posted: Thu Dec 10, 2009 1:49 pm

The engine in the pic below is a 3B that has been built by Adrian from Impulse Developments, Roachdale.
It belongs to Dale the owner of the Black S2 coupe that some of you chaps have seen parked up here for a wee while now, we only got it back a few days ago and I will be installing it within the next couple of weeks.

Now this has a alloy flywheel and a ribbed alloy front pully, these and the clutch and also the crankshaft have been balanced whilst all assembled in the block so's to obviously achieve the best possible results.

I have to say that the workmanship on both the block and cylinder head is beautifull, shame that it will all be hidden when completed.

The head has had a full strip down with new valve seats fitted and the block has also had extensive work too with the usuall uprated rods etc.

Wish they were mine Smile

They would make a lovely focul point in the living room Very Happy

Posted: Thu Dec 10, 2009 1:58 pm

Are you still on standard brakes?
Braided lines and or uprated pads? One thing i always thought about was ducting for the brake discs. The wifes BMW has it, looks and works rather well.

Nogin, that looks wonderful, i really want to hear how the first run goes with that, and keep bex WELL away from it!

Posted: Thu Dec 10, 2009 3:13 pm

I think i need to say this- I love 5 cylinders. Very Happy

Posted: Thu Dec 10, 2009 6:48 pm

ooh

Posted: Thu Dec 10, 2009 8:15 pm

Will do Darryl, I think it was purchased for him through another party but I would imagine he will have the reciept with details of where from/cost in any case.

The 7A head there looks sweet through them ports and I can see the gains just by looking at it, in fact, I can even hear it already Very Happy

Nice work Tony, keep up the good loving man Cool

Posted: Fri Dec 11, 2009 9:35 am

I

Posted: Fri Dec 11, 2009 10:03 am

I wouldnt really know Darryl because it was ported from when I first upgraded to 20v. To be honest I dont think it has as I have never noticed any difference compared to standard 20v's I've worked on.

Sound I would say is down to what type/layout and make of exhaust you have fitted.
Personally I have always been a fan of Scorpion systems, they give a nice burble at low speed as well as when thrashed.

I did like the sound of the powerflow too, that's the one Bez had fitted to his coupe sometime ago, it had the smallest rear silencer ever and when you nailed it, it was awesome the only draw back was to much resination in the cab when one is or can drive normaly.

Posted: Fri Dec 11, 2009 11:24 am

I hear ya! (Or should I say, people hear me when giving it "beans" ) Laughing

Posted: Fri Dec 11, 2009 2:34 pm

Mine

Posted: Fri Dec 11, 2009 4:31 pm

same exhaust, 4 cars (one was a 20v)- sounded different on each. In fact, we changed the front silencer on the current one (different shape) and it was different again....

Posted: Fri Dec 11, 2009 5:15 pm

We used to fit ultra light flywheels to the mini engines we built in our youth.... it was generally accepted that they gave a performance improvement due to the less mass the engine has to accelerate when pulling through the gears but that they made the engine less forgiving.... lumpy tickover and much easier to stall were the main downsides but we are talking small cc race engines here where the powerband was 4000 to 9000 rpm and the flywheels looked like swiss cheese lol

EN24 Steel, “Feather-light” 6 pound Mini Flywheel with integral ring gear (suits race starter). This is no ordinary “Ultra-light” flywheel. Not only is this masterpiece lighter than the KAD aluminum one, it is much stronger and is designed for long life. An added feature of the design and construction is the strengthening in the tapered section that makes it far easier to remove from the crankshaft. Original stock factory flywheel weighs about 16.5 pounds. With over 10 pounds savings in rotational weight, this flywheel provides the equivalent of taking about 250 pounds out of the total weight of the car, resulting in fantastic acceleration gains.

Posted: Fri Dec 11, 2009 5:43 pm

Nog - that engine of Dale's look superb - Could you not give him an old 20v lump and keep his block and make a nice smoked glass top for it? I'm sure Sue would love it as a coffee table Laughing

Posted: Fri Dec 11, 2009 6:21 pm

Talking of up-grades, any sign of your yet Owen? Or are you too scared to tell Eric you really want a nice smooth V6. Laughing

Posted: Fri Dec 11, 2009 7:03 pm

The way Dale drives Owen, he may be better off with your 1.6 never mind an old 20v lump Laughing

Posted: Fri Dec 11, 2009 9:55 pm

I am thinking about cleaning up the cast manifold i have and using it as a shelf support... got mileage!

Posted: Fri Dec 11, 2009 10:36 pm

Still on the cards early in the new year Wink

Has to be a 5 pot for me though - old fashioned rally fan me! Very Happy

Posted: Tue Dec 15, 2009 3:09 pm

Found a few issues with the valve guides so had to buy a new set.

After i adjusted the O/D of them from 12.07 to 12.05mm i pressed them in ( intakes only at this stage).
then put a valve in and see if theyre straight.... Im quite happy with the way these have gone, sometimes they can be a mile out, but in this case they were pretty much perfect.

Then its on to cutting the new seats as the old ones were pitted pretty badly.

Heres my valve seat grinding machine ready to go.

A short time later and ive got 10 perfect valve seats in the head.

Heres a closer look.

Next thing to do is grind the valves themselves as theyve seen better days and then get the rest of the guides tomorrow.

Posted: Tue Dec 15, 2009 4:33 pm

cheers

Posted: Tue Dec 15, 2009 5:39 pm

Ahh the dratted software!

Yes i found for some reason that the master database file that all my head results are in is now corrupted and beyond use.
Two years of tests gone in a flash..... Sad

Ive tried to recover the data and i can see that some of the titles for the various jobs ive done are still readable in wordpad etc, the software wont however accept the "recovered" file even tho it really should so im a bit screwed.
It means i cant call up previous tests and overlay past graphs to make comparisons.

Its not entirely bad news because i did do a dump of each graph to a bitmap format so i can print these off if needed, and some of the tabulated results, its just that i cant use them in the flowtester software which is a bit of problem because thats where theyre most useful. Sad

Thatll teach me to make regular backups.
Im a dweeb.

Posted: Wed Dec 16, 2009 8:05 am

Tony: email me the file you have, let me have a "play" with it... maybe able to get info out for you....

Posted: Wed Dec 16, 2009 8:14 am

Thanks for the offer Andy.

Ive got one last thing to try.
I need to find an earlier copy of a programme called " microsoft access".
The more recent versions dont work correctly on the file, although they "repair" it, the flowtest software cant read it because the it becomes unrecognized.
If i can find a version from 2002 (when the software was first written or maybe the next one) then it will likely repair it.

Thanks once again Andy, if i get nowhere ill send it to you. :tup:

Posted: Wed Dec 16, 2009 8:42 am

try opening it in wordpad, or importing it directly into excel.

I think I'm running an older version of access on one of the PC's at home. (Think one has office 2000 on it)

I use office 2003 on my own.

I can always try to import it into SQL.... usually a bit more powerful; the only issue is losing the table links/ joins, but getting the data is the first thing....

Posted: Wed Dec 16, 2009 8:52 am

I have Office 2000 here with Access on it Wink

Andy 'should' be alright with access, if not i can take the piss! Also an offer from a computer nerd here as well.

Tony/Audioc, if you havent used it yet, OpenOffice has got a LOT better. The Base application is backwards complaint as well. http://download.openoffice.org/index.html

For Tony, Open Office is a basically a free version of Microsoft Office, not dodgy, but rather good and getting better every month. They have their own version of Access in their called Base, its virtually identical, same goes for the word and excel clones are near identical in use and operation.

Backup are always learned the hard way.
First thing to do. Copy all the data onto a CD/DVD and keep it somewhere else. Last thing you want to do is bust it.
Then consider investing in some of the online backup stuff. I have used www.carbonite.com for a few years can be a wee bit tricky to setup but once running its a piece of cake.

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on the engine front, looking great. i read you have reduced the valve seat sizes by .02mm, did you add material or move the position?