Saturday, October 22, 2011 - 03:43 pm, by: chris sthill(Socachris)
i am having a lot of trouble with my 1jz head on the 2jz block . i popped my timing belt and messed up 2 of the valves on the jz head , and noticed that the number 6 piston ring land broke so i decided to single turbo it and i changed the piston to the 1jz pistons but I'm only getting 10 on my vacuum gauge. Could it be because i have the 1jz pistons in there and the 1jz head gasket dropping my compression like crazy???? if i try to full throttle it i would see at leave 10 on the gauge but no power please help......
Saturday, October 22, 2011 - 04:35 pm, by: David Ward(Djwtoyota)
How much research and advice did you seek before going down that path Chris? Not sure what relevance going to a single turbo has to your problems? Do you mean 10 psi vacuum on your boost gauge? Not sure what the last sentence is meant to say though?
Saturday, October 22, 2011 - 04:57 pm, by: chris sthill(Socachris)
Well David ,the 1jzgte head is non interference but when that head is on a 2jz ge block the valves are in danger due to the fact the pistons are slightly different. and yes its 10 psi on the boost gauge ... sorry for that
Monday, October 24, 2011 - 11:29 am, by: Chris Sthill(Socachris)
well i decided to buy another 2jz ge non vvti this time and see how it goes., due to the crank sprocket moving around on its own... i came to the conclusion that the keyway broke out of its groove....Yes i was told i could put the 1jz pistons and it would be fine ....so my question is does the 1jz gte is better then the 2jz ge better in compression wise?
Monday, October 24, 2011 - 11:52 am, by: Adrian McGuire(Adro)
the 1jz gte motor runs a decompressed motor because of the turbo. it runs at about 8.5/1 compression. the 2jz ge block being N/A runs at about 11.3/1 compression. if you are building a 1.5jz turbo motor i would have thought you had to run the same compression rate as the 1 jz otherwise when it comes on boost there will be far to much compression for the block and head to handle which will result in head gasket failure at the least.