Page 1 of 1
Compression testing at Brands?
Posted:
Sun Apr 26, 2009 5:24 pmby Andrei
I believe most of us got tested at Brands but what figures are within regs? Does anyone know?
What figures are "good" and "bad"?
Posted:
Mon Apr 27, 2009 11:08 amby Rogue
Hi Andrei,
Feedback from the scrutineers was that all car were well within the limits specified in the workshop manual, and that there only seemed to be a spread of around 10 psi between all of the engines tested.
I need to dig out the document I gave the scrutineers and will post the limits here - they will explicitly form part of our regulations for next year.
Patrick
Posted:
Mon Apr 27, 2009 9:53 pmby Andrei
Thanks!
Am I right thinking that the higher the figure the more power the engine would have?
Posted:
Wed Apr 29, 2009 9:47 pmby WillJohnson
I know this one! Yes.
Cheers JOHN
Posted:
Wed May 13, 2009 10:11 pmby Andrei
Rogue wrote:
I need to dig out the document I gave the scrutineers and will post the limits here - they will explicitly form part of our regulations for next year.
Patrick
Hi Patrick
Have you had a chance to find these figures?
Thanks!
Posted:
Thu May 21, 2009 10:24 pmby Andrei
They must be well archived?
Posted:
Sat Jun 27, 2009 3:20 pmby Andrei
Any info please?
Posted:
Sat Jun 27, 2009 10:29 pmby buba
i read on an ad for a mk2 on ebay the other day that it had "175 accross all cylinders" 175 whats i wouldn't like to say. psi?, kg/cm2?, smarties to the pound? should say in a workshop manual
Posted:
Sun Jun 28, 2009 9:35 pmby Andrei
Erm... thanks for that...
but was looking for something a bit more precise and official from Patrick
Posted:
Mon Jun 29, 2009 9:10 amby Rogue
Unfortunately, I don't have a copy of the document that I gave to the scrutineers. I'll get my engine builder to sort out the specs again when he's got the time, and failing that I'll be able to get hold of the original from the scrutineers at Cadwell.
Patrick
Posted:
Sun Aug 09, 2009 5:19 pmby LuckyP
Just flicking through the workshop manual. The 3S-GE compression pressures are:
12.5kg/cm2, 178 psi, 1,226kPa or more
Minimum pressures are:
10.0 kg/cm2, 142 psi, 981 kPa
Now, before anyone who can remember what they were tested at goes out and buys a new engine - these figures are taken with all the plugs out. We did ours with only one out - that might have made the difference.
After John's post (which I can't find) on filter change, I took mine out to see if I could find any HP hiding in there. Couldn't see any - just half of druids gravel trap a couple of bales of hay and about 3 litres of oily sludge.
In a very scientific experiment to see if there was any flow difference pre an post cleaning, placed mouth over throttle body end and sucked in it's dirty condition, and then with that rather unpleasent memory in my head, tried again just after the 'petrol bath'. All I can say is that I won't be trying that again in a hurry!!!! Wow man - gasoline buzz!!!!
Well it's clean now. We'll see.
Lucky