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Compression Ratio advise please on forge build


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My engine is not far away from completion people who have been following my build can see bottom end is build up and head work is near finished and would like some advise on what sort of C/R would you advise me to run?



thoughts were to use a Athena 1.4 head gasket but its in question at the moment.



as want it to be reliable but still spool up and be responsive?



looking to run 1.5-1.6 bar full boost


car is intended for fast road and doing a fair few track days and looking to enter Toyota sprint series



basic spec list



Engine


4E-FTE Block


Wossner 74.5mm pistons


PEC rods


ACL main bearing


ACL big end bearings


ACL thrust bearings


ARP head bolts


ARP main stud and nut kit


Toyota oil pump


Toyota water pump


Toyota full gasket set


Toyota dizzy cap & rotor


NGK iridium spark plug


Magnacore 8mm HT Leads


Light weight crank pully


Light weight power steering pully



Head and inlet


Attain Throttle Pulley


Standard Inlet manifold ported to match head


Ported and polished head


3 angle valve job


PEC 1mm oversize big valve conversion


Toyota Yaris 1nzfe solid buckets


standard springs


standard cams




Fuel system


HKS highflow fuel rail


Sard fuel pressure regulator


Sard 550cc injectors




Turbo setup


Greddy TD05 16G turbo


Tial MVS 38mm vband wastegate


Race-Tech custom manifold



engine management


Power FC




any advise would be great


Edited by abbott
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750cc injectors will be needed for anything above 1.5 bar

If you want good idle go for id1000

Like said that turbo spools super fast so concentrate on reliability 8.2 - 8.5/1 cr would be just right

Thanks again Gee all has been stored in my head to feed back to Rob. you have PM on FB

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