so i just finished putting my new motor in and i have some questions maybe some of you can help me out with. first lets get the mods out of the way. built 2.0 with eagle rods wisco pistons, head is port and polished with 1mm over valves upgraded springs basically whole new motor, i am running the stock turbo for break in, has all bolts ons. know my questions is a idle and cruising speed my a/f ratio is at 17.5 to 1 i know that is way lean i least i think so. i am not to wise to the tuning of these cars yet. but when a little boost kicks in the a/f ratio is right were it should be 12 to 1 should i get this car tuned before i even drive it or should i be safe in till i get to the tuner Thursday of this week i will be driving the car about 50 miles a day if i do drive so i need to know if it is going to be safe or should i just let it sit in till Thursday? thanks for the help

 

12:1 is NOT where your afr should be. That is lean. I would let it sit until thursday until you can get the tune cleaned up, no point in risking it and breaking your new motor.

 

hey i am in your same situation i blew my motor and i am not sure where to go from here i would like to make as much power with out pulling the block out of my car i need new pistons and head work can i get some opinions on where to go with goals of 500whp

 

correct way to do it is pulling it and sending to a builder or a good machineshop.

or have someone that is very good skilled with drop in pistons then they can do it while th motor is still in the car

 

so what mods would you suggest while i currently have the motor torn apart minus the block how hard are the pistons to pull and drop new rods and pistons in i am fairly mechanicly inclined.

 

also i have heard mixed on porting and polishing the head and if to do bigger valves or not..?

 

Bump

 

I'd just put the extra time in, and pull the motor out and do it the right way!!! In the end it'll be worth it. You don't want to have to do the job twice ya know..... But in the end it is up to you..... GL

 

I bought a Cosworth stage 3 head for my car, and I love it! It really just depends on how far you want to go with your car. I started out not really wanting to mod my car out all crazy, but as I started making more power I couldn't stop!! Ha ha. Flow is everything

 

stay away from driving it...17 is lean at idle and cruise...12 is also lean for WOT or going in boost get it checked out

 

so if i keep the stock head would you suggest port and polish and bigger valves?