molch Donating Members 174 Member For: 18y 4m 26d Gender: Male Location: Central Coast Posted 07/08/17 08:59 PM Author Share Posted 07/08/17 08:59 PM Got the car started on the weekend and it's not a good diagnosis. Still low on compression across cylinders the same as when I started. So it's engine out and bottom end inspection next. Going to call te shop that did the head and chat about pistons and rods but wanted to see what people on here say. im looking at all the usual suspects mahle, Manley, cp, and the atomic cosworth $$, with suitable rods. What's the general consensus of materials and compression ratios? The set of Manley ones in looking at have two compression options . 8.5:1 or 9.0:1. I was thinking of going the slightly higher to increase low down torque (albeit ever so slightly) has anyone used these? http://www.manleyperformance.com/sc/mk/ford/xr6_pistons.shtml Link to comment Share on other sites More sharing options...
arronm Dropping a turd Gold Donating Members 9,520 Member For: 17y 2m Gender: Male Location: Perth Posted 08/08/17 02:21 AM Share Posted 08/08/17 02:21 AM Have you checked with a different compression tester ?? Maybe yours is not reading correctly Link to comment Share on other sites More sharing options...
Ralph Wiggum Moar Powar Babeh Lifetime Members 19,323 Member For: 19y 3m 4d Gender: Male Location: Perth Posted 08/08/17 05:49 AM Share Posted 08/08/17 05:49 AM Is the battery charged? Link to comment Share on other sites More sharing options...
xr6tForMe Donating Members 268 Member For: 11y 5m 28d Gender: Male Posted 08/08/17 05:57 AM Share Posted 08/08/17 05:57 AM When you had the head off, did you check how high each of the pistons came up the bore. ie no short/bent rods Link to comment Share on other sites More sharing options...
molch Donating Members 174 Member For: 18y 4m 26d Gender: Male Location: Central Coast Posted 08/08/17 08:13 AM Author Share Posted 08/08/17 08:13 AM Battery has plenty of charge and Yeah pretty sure the tester is ok because it comes up to 160 for number 6 and the rest are between 90-120! I did check the piston height by a Dowel before stripping head and again when the head was off and everything appeared ok from my rough check. I didn't check with mm precision so that's a possibility still. Either rods are slight bent or rings or ringlands. Will try and pull the engine out this weekend or next and get it on a stand for a proper check. Owell atleast I'm learning along the way. 1 Link to comment Share on other sites More sharing options...
MattyP MattyP Cruise Control 6,317 Member For: 12y 7m 23d Gender: Male Location: Central Coast Posted 08/08/17 10:28 AM Share Posted 08/08/17 10:28 AM Sorry to hear mate :( I know the feeling Link to comment Share on other sites More sharing options...
molch Donating Members 174 Member For: 18y 4m 26d Gender: Male Location: Central Coast Posted 08/08/17 09:55 PM Author Share Posted 08/08/17 09:55 PM All good, along the way I keep talking myself into upgrades so the bill keeps adding up but I got a long way to go yet. haven't decided on a what Ill do for the drivetrain once its going again so will have to take it easy for a while. So far added the following bits to the build: atomic chain and guides atomic oil pump with billet gears process west surge with twin 460's process west dual entry rail arp head studs now im looking at pistons rods girdle arp studs flexplate I think that would be it for engine after that. Link to comment Share on other sites More sharing options...
MattyP MattyP Cruise Control 6,317 Member For: 12y 7m 23d Gender: Male Location: Central Coast Posted 09/08/17 09:47 AM Share Posted 09/08/17 09:47 AM Sounds like a mad build, Have you got all the tools required for a rebuild? Link to comment Share on other sites More sharing options...
xr6tForMe Donating Members 268 Member For: 11y 5m 28d Gender: Male Posted 09/08/17 10:20 PM Share Posted 09/08/17 10:20 PM (edited) I should have said before: Sorry to hear about the problems. I hope the end result is great. Thanks for posting. Edited 09/08/17 10:20 PM by xr6tForMe Link to comment Share on other sites More sharing options...
molch Donating Members 174 Member For: 18y 4m 26d Gender: Male Location: Central Coast Posted 10/08/17 03:36 AM Author Share Posted 10/08/17 03:36 AM I've got all the usual tools but I don't yet have a engine Crane or stand so organsiing those soon. I'll get hypoformance to do the machining, balancing and assembly work. Link to comment Share on other sites More sharing options...
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