Sorry vtec gay not vvl, Craig has vtec....looking good still though craigy..
Craigs New Datsun Sunny
- Thread starter craiGTi
- Start date
wamt - fried rings
engines on 5k miles so i thought i'd give it a little compression test today
results:
dry test
290psi, 290, 260, 190
wet test
300+, 300+, 290, 290
which is rather gheyyyyy, considering the fact it doesn't smoke at all, pulls like a train as the in-car vid showed the other day, uses no water. Nothing.
so why or how it's gone is beyond me, but meh this is just another regular service item for lucky old me.
I have a spare block in the shed i might build up with either 87mm or 90mm pistons.
In the meantime i'm still gonna rape the lobe loving arse off it, it feels faster than it ever has, much quicker than when it dyno'd 207bhp on surrey, i reckon it'd still pull a decent figure on HLM, or 1/4 mile time so i might just go n find out anyway.
and you can shove your fisher price comments up your arses cos ring end gaps n everything were checked and for a long time comp tests showed even across the board. so nerrrrrrrrrrrrr
engines on 5k miles so i thought i'd give it a little compression test today
results:
dry test
290psi, 290, 260, 190
wet test
300+, 300+, 290, 290
which is rather gheyyyyy, considering the fact it doesn't smoke at all, pulls like a train as the in-car vid showed the other day, uses no water. Nothing.
so why or how it's gone is beyond me, but meh this is just another regular service item for lucky old me.
I have a spare block in the shed i might build up with either 87mm or 90mm pistons.
In the meantime i'm still gonna rape the lobe loving arse off it, it feels faster than it ever has, much quicker than when it dyno'd 207bhp on surrey, i reckon it'd still pull a decent figure on HLM, or 1/4 mile time so i might just go n find out anyway.
and you can shove your fisher price comments up your arses cos ring end gaps n everything were checked and for a long time comp tests showed even across the board. so nerrrrrrrrrrrrr
Pahaha!
fuck off
thats what i meant :VVL:
yeh cheers mate, will do probably
it doesn't really phase me this shit anymore lol
whats annoying me more is why it's gone, what made it when not that long ago compression was even. and how it seems to pull better than ever with the readings like that...
only thing i can think is theres some mid range knock still lurking about and has weakened stuff over time
it doesn't really phase me this shit anymore lol
whats annoying me more is why it's gone, what made it when not that long ago compression was even. and how it seems to pull better than ever with the readings like that...
only thing i can think is theres some mid range knock still lurking about and has weakened stuff over time
Such a shame mate I loved watching that vid of it, proper beast.
precisely, hence why i'm confused
wonder what it'll be like with even compression, the new header i'm still gonna order, my IM ported out, some manley rods and it all mapped properly with more midrange power and vvl switching right!
if anything it's a good thing, second time round will be awesome, especially if i can manage 90mm bore
hahaha, exactly my thuoghts before and after testing it lol
i tested it like a gazillion times, then i went halfrauds and bought a new compression tester. sadly it didn't change :lol:
Sorry to hear mate, altho if its pulling like a train i wouldnt worry, check it again tomorrow see if its any different, sometimes you can get wrong readings because of many reasons.
Just woundering did you fit new rings, also did you fit them all with the markings facing up and all ring gaps not inline?
You may have answered these questions already if so sorry lol its quicker asking than searching though your thread lol.
Daniel
- Sent using my mums pink laptop -
Just woundering did you fit new rings, also did you fit them all with the markings facing up and all ring gaps not inline?
You may have answered these questions already if so sorry lol its quicker asking than searching though your thread lol.
Daniel
- Sent using my mums pink laptop -
yeh complete cp piston set, new rings, all the right ways up, staggered ring ends to reduce blowby
like i say the comp tests used to show even across the board, it doesn't smoke, anything
and here's my vid which shows it's not slow
[video=youtube;VVI5k9CrV5o]http://www.youtube.com/watch?v=VVI5k9CrV5o[/video]
must be engine knock or something causing it to weaken i spose. damnit vtak did this, vvl woulda got rid of any chance of mid range knock but damn vtak meant 5-6k was very close to knocking iirc
next question is 87mm, risk 88mm on stock liners.....or get block sleeved by one of joe's sketchy engine building mates and go 90 or 92mm
need to speak to the man about the sleeving but if it's all good i might go 92mm, even if the block fucks up or owt i've got the 92mm pistons for when i can afford a mazworx prepped block
need to speak to the man about the sleeving but if it's all good i might go 92mm, even if the block fucks up or owt i've got the 92mm pistons for when i can afford a mazworx prepped block
R
Red
Guest
I may be asking you the obvious, did you comp test the engine with a wide open throttle and on a hot engine? And a fully charged battery with all the spark plugs out too?