RobSheffield Posted June 13, 2009 Share Posted June 13, 2009 Nail on the head Dave. IF the bearings are that badly worn there could be lots of swarf in the oil, running via the those expensive turbos Quote Link to comment Share on other sites More sharing options...
scoooby slayer Posted June 13, 2009 Author Share Posted June 13, 2009 The whole idea of buying a car which you know could very well be buggered beyond belief astounds me :S Still, they do say one is born every minute! bargain at £4k and you know it. Quote Link to comment Share on other sites More sharing options...
scoooby slayer Posted June 13, 2009 Author Share Posted June 13, 2009 We know that you bought the car knowing that it had a rattle despite many members on here advising not to. Then after buying it you say: So now why the change in heart and continue with a thread about the rattle. Stick to your word and sort it out if it blows up...... lucky seller for cashing in while he could......some people have all the luck... whats your point exactly ? plenty of grippers on here i see. what the fuck is wrong with you lot exactly ? Quote Link to comment Share on other sites More sharing options...
scoooby slayer Posted June 13, 2009 Author Share Posted June 13, 2009 I find it very difficult to diagnose engine noise from video sound, but like i said if you hold the RPM at about 3,000 when stationary does it have a kind of resonant rattle, it won't be very pronounced unless its quite close to failure. But it will be quite apparent hot or cold. We did try and warn you fella. Oh! and the knock sensor will pick up extra or non normal mechanical noise. yes resonant rattle at about 3k but quiet everywhere else. and a single rattle when throttle is opened quickly. my mate asked rob about an rb26 fresshen up and it was £3k. im gonna ring him monday and get a rough costing allowing for crank grind but assumeing pistons and cams are ok. its only cost me £4k and at least il start with a fresh engine for me to get the best out off its defo not bad at the moment ive heard engines that have had big end failures and its nowhere near as bad as that. if it is its been caught very early. so a resonant rattle at 3k is a sign of big end failure then mate ? Quote Link to comment Share on other sites More sharing options...
scoooby slayer Posted December 7, 2009 Author Share Posted December 7, 2009 well i got here back from tr racing saturday. new crank and forged pistons, rob found an as new jun pump in there so bonus made the following power on 1.55 spike 1.4 bar held v power : couldnt hold anymore than 1.4 bar as air flow meters are now almost maxed out. thanks tr racing and RIP tweenie rob a part of him lives on in my car Quote Link to comment Share on other sites More sharing options...
tooquicktostop Posted December 7, 2009 Share Posted December 7, 2009 Nice, love the GTR, great power figures mate, the R32 really knows how to put it down as well Quote Link to comment Share on other sites More sharing options...
JamieP Posted December 7, 2009 Share Posted December 7, 2009 Nice car, strange looking graph, ive not seen power and torque curves pass that high in the rev range before, nice torque output. Quote Link to comment Share on other sites More sharing options...
leelbuk Posted December 7, 2009 Share Posted December 7, 2009 I take it with the work the dreaded rattle is gone? Expect you are much happier with it now! A little side note though - Someone may correct me on this, but shouldn't all torque and bhp curves plotted on same graph cross at 5252rpm? Quote Link to comment Share on other sites More sharing options...
JamieP Posted December 7, 2009 Share Posted December 7, 2009 I take it with the work the dreaded rattle is gone? Expect you are much happier with it now! A little side note though - Someone may correct me on this, but shouldn't all torque and bhp curves plotted on same graph cross at 5252rpm? Thats what i thought but then realised the scales on each side of the graph are different;) Quote Link to comment Share on other sites More sharing options...
leelbuk Posted December 7, 2009 Share Posted December 7, 2009 Came back for another look as I just realised that I hadn't checked the scales! Schoolboy error I did A level maths and physics too.... Quote Link to comment Share on other sites More sharing options...
Harris25 Posted December 7, 2009 Share Posted December 7, 2009 hmm still not a supra though. nevermind Quote Link to comment Share on other sites More sharing options...
scoooby slayer Posted December 7, 2009 Author Share Posted December 7, 2009 thanks for the comments peeps. just thought id come on and show progress. hoping for some 1/4 miles next year at pod. Quote Link to comment Share on other sites More sharing options...
Ian C Posted December 7, 2009 Share Posted December 7, 2009 new crank and forged pistons, Soooooooo the bottom end was fubar then Quote Link to comment Share on other sites More sharing options...
scoooby slayer Posted December 8, 2009 Author Share Posted December 8, 2009 Soooooooo the bottom end was fubar then crank was scored the jun pump was masking it very well. pistons were fine but i decided on uprated pistons motor should be good for over 600 bhp now reliably. still a cheap car imo 9.5k with a pro built fresh engine im happy. the only thing that stopped more boost was airflow meters maxed out. injectors are at 80 % duty 700 ccs. Quote Link to comment Share on other sites More sharing options...
Ian C Posted December 8, 2009 Share Posted December 8, 2009 I'm just happy my diagnosis was correct from the sound on the video you recorded The crank would be scored from a damaged bearing rattling around. I only know this from bitter experience in the world of MkIII Supras, mind Quote Link to comment Share on other sites More sharing options...
sdistc Posted December 8, 2009 Share Posted December 8, 2009 Now, just for clarity, you recycled a used oil pump from a damaged bottom end motor?!? Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted December 8, 2009 Share Posted December 8, 2009 Now, just for clarity, you recycled a used oil pump from a damaged bottom end motor?!? In reality if dissembled and checked correctly,finding no wear or scoring and thoroughly cleaned, it should be fine presuming it was providing adequate pressure/volume before, and was not the cause of the problem it will be fine. Its not like its an oil cooler etc which will hold on to particles. Quote Link to comment Share on other sites More sharing options...
Jamesy Posted December 8, 2009 Share Posted December 8, 2009 Nice car mate - i like the R32 but my fav skyline is the R34 GTR At least you got the problem fixed and if you're not worried about having to spend £5,000 (more than the car was bought for) on a new engine then happy days .... Quote Link to comment Share on other sites More sharing options...
sdistc Posted December 8, 2009 Share Posted December 8, 2009 In reality if dissembled and checked correctly,finding no wear or scoring and thoroughly cleaned, it should be fine presuming it was providing adequate pressure/volume before, and was not the cause of the problem it will be fine. Its not like its an oil cooler etc which will hold on to particles. Agreed, but emphasis on "if disassembled and checked correctly". Brand new is cheap insurance on a new motor. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted December 8, 2009 Share Posted December 8, 2009 Peak torque is about 5200 RPM, and seems to be about 420 ft lbs. 420 x 5200 = 2184000 2184000 divided by 5252 = about 416 BHP. so where does a figure 1.28 time higher come from? Quote Link to comment Share on other sites More sharing options...
jevansio Posted December 8, 2009 Share Posted December 8, 2009 Peak power & torque won't be at the same rpm, it makes 416bhp @ 5200 but goes on to make more power higher up whilst torque is dropping Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted December 8, 2009 Share Posted December 8, 2009 Power is measured in HP and torque in ft lbs on that graph, therefore the lines should cross at 5252 RPM. They don't, why is that? Is it because the torque axis doesn't start at zero? Quote Link to comment Share on other sites More sharing options...
scoooby slayer Posted December 8, 2009 Author Share Posted December 8, 2009 Now, just for clarity, you recycled a used oil pump from a damaged bottom end motor?!? yes tweenie rob was no amateur ! car still had good oil pressure even with knackered crank. pump is as new. Quote Link to comment Share on other sites More sharing options...
scoooby slayer Posted December 8, 2009 Author Share Posted December 8, 2009 Peak torque is about 5200 RPM, and seems to be about 420 ft lbs. 420 x 5200 = 2184000 2184000 divided by 5252 = about 416 BHP. so where does a figure 1.28 time higher come from? look at the graph again. 5200 rpm is 428 lbft. read lbft from left side of graph dotted line. 428 / 5252 x 5200 = 423 bhp bhp is solid line read from the right side numbers 423 bhp at 5200 rpm. bhp and torque readings dont run paralel up the graph hence they cross at 7k instead. Quote Link to comment Share on other sites More sharing options...
scoooby slayer Posted December 8, 2009 Author Share Posted December 8, 2009 Power is measured in HP and torque in ft lbs on that graph, therefore the lines should cross at 5252 RPM. They don't, why is that? Is it because the torque axis doesn't start at zero? the bhp and lbft figures dont run paralel to each other so dont cross at 5252. if they did the torque curve would be lower on the graph and they would cross at 5252, you just have to read the graph correctly. . Quote Link to comment Share on other sites More sharing options...
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