Hi I am building an EK hatch with an obd2 gsr swap. I got the car with the blown gsr so I am rebuilding it. I am going with N/A. I was wondering what the maximum compression i can safely run and still be able to use pump gas 91 or 93 octane. It is going to be a mostly stock block and head. I have heard that the highest you should run is 11:1.

thanks in advance

Rob

 

11:1 is a good number!!!

 

11-12:1 is about the most you should shoot for. things like elevation, weather, cams, and tune play a big part.

 

thank you for your replies. I will probably shoot for around 11:1 I was just trying to get everything straight because when i rebuild the engine i want the internals to be decent so in the future I can mod it more as i get money, and i dont want to have to worry about things like pistons and such.

One more question is what bearings to go with. I plan on using ACL but im not sure if i should go with the DuraGlide series or the Race series. The car is gonna stay N/A but i just want to have a peace of mind and know that it will be strong and capable to taking alittle abuse and still last along time.

Thanks in advance for any help or replies

Rob

 

I would use OEM Honda bearing properly clearanced but that is just me.

 

ACL race bearings are a little looser than the normal ACL bearings. ACL's are all equivalent to honda's green or middle bearing size. if they give you the desired clearance's, use them.

 

Jdm Type R Pistons will get you a little over 11:1 with a stock headgasket! www.inlinefour.com has them including the rings for $320. i get some of my honda/acura oem and aftermarket parts from them!!