1.8t engine build question

[nicolas543]

hi , i now building a 1.8t with je piston and eagle rods. i run a stock aeb head! my question is ! can i time the engine the same as stock or i need to time the engine differently ( timing belt ) ?

[CaptainJohn]

There should be no change in timing if you have not changed the compression ratio. CR changes will need to be dealt with in software (tuning).

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[redline380]

Is this for serious? Dude could change compression ratio to 20:1 and he would use the same tbelt.

There should be no change in timing if you have not changed the compression ratio. CR changes will need to be dealt with in software (tuning).

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Tbelt stays with the bottom end, so use the stock one.


Do not forget, you want to run an 06a cam gear too. Don't use the AEB one. If you are using the AEB cams you will also want to switch the cam trigger wheel under cam sensor to the AMB one. You will notice the AEB one only has one notch in it, while vvt cars have a couple.

Besides that, remember to stick with 06a head bolts, the 058 ones are 11mm. You need 10mm bolts

[CaptainJohn]

Is this for serious? Dude could change compression ratio to 20:1 and he would use the same tbelt.

The initial question was somewhat ambiguous. The belt would be the same, however, ignition timing would change dramatically, which is why I referenced software.

[redline380]

The initial question was somewhat ambiguous. The belt would be the same, however, ignition timing would change dramatically, which is why I referenced software.

Understood. I took his question to regard mechanical timing, not spark timing. But yes, if he is going to change comp ratio, tuning would be advised.

[nicolas543]

thanks every one , i change the cam gear and the trigger wheel . i will put my head tomorrow and i will stay win the poem timing

[diagnosticator]

thanks every one , i change the cam gear and the trigger wheel . i will put my head tomorrow and i will stay win the poem timing

There are no alternative cam timing settings. Even if an adjustable cam timing belt sprocket is used, the only reason for using it is to be able to adjust the cam timing to the exact OE stock cam timing with relation to the crankshaft, using a degree wheel on the crankshaft. This can eliminate any random variation of the base cam timing due to tolerance stack up.

[redline380]

Even if an adjustable cam timing belt sprocket is used, the only reason for using it is to be able to adjust the cam timing to the exact OE stock cam timing with relation to the crankshaft, using a degree wheel on the crankshaft.

That's not how IE uses it.

http://www.performancebyie.com/blog/...able-cam-gear/