Xu5Ja B6D 9.8:1 Reduce The Rate Of The Compressor Help

[eTiKeT 0 1 Cars]

hello friends

I mounted my car now XU10J2TE manifold and turbocharger

car engine 1.6 115 hp 9.8:1 cr xu5ja B6D

OEM injectors are now using the Jetronic system

use with OEM internal westgate

turbo 0.4 bar peak pressure, continuous 0.3 bar

What can I do to lower the compression ratio?

xu engine parts is no longer here

I do not want to enlarge the cylinder head combustion chamber

Do you have an alternative piston 83 or 84 mm?

Thank you in advance for your help and advice

 

[Tom Fenton 1,542]

I do not want to enlarge the cylinder head combustion chamber.

 

Why not? Cheap and easy to do, effective.

[eTiKeT 0 1 Cars]

Why not? Cheap and easy to do, effective.

It removes the coming days if I am turbo, compression will be low

find it very difficult to clean head

xu9ja engine, rising 11.1 compression ratio piston is inserted xu5ja

I used xu9ja piston, the estimated compression ratio is how?

thanks

[DamirGTI 342]

If not by enlarging the head combustion chambers volume , it can be lowered by fitting dished pistons from 1.9 D6B or DKZ engine .

 

The easiest option would be to try and find a 1.9 DFZ head , which has deep chamber volume as OE item .

 

Second , the pistons . They are press fitted on the connecting rod with guiding pin - so there's no clip on the end of the guiding pins , for removing them in order to disassemble the piston from the connecting rod , like in the case of Mi16 engines .

 

So , in order to fit either 1.9 D6B or DKZ pistons for purposes of lowering the CR on 1.6 engine you'll first need to separate

1.9 pistons from the 1.9 connecting rods , and then fit back said pistons on 1.6 connecting rods .. and there's "an problem" , for disassembling and assembling the pistons and connecting rods you'll need special tools (if you try searching , you'll find my previous posts with the documentation/pictures from OE Peugeot service book about piston disassembling/assembling procedure and tools data)

Disassembling the piston from the connecting rods is not as hard (can be done with shop press , but still needs caution for possibilities of breaking the pistons during the pressing) , assembling the piston and connecting rod is really something i wouldn't recommend doing on a DIY basis cos it's really tricky , especially without the aid of needed tools for the procedure .

 

Pistons volume specs. :

1.6 B6D - 9cc dish

1.9 DFZ - 9cc dish (same piston as on 1.6 but with 1.9 connecting rod)

1.9 D6B - 15cc dish

1.9 DKZ - 17cc dish

 

 

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