I need some help deciding on which engine I should put into my 93 EG. I just got a free LS longblock with bad compression, or I could get a gsr longblock, bored out to 81.5 mm for around 700 installed from a friend. Now would the gsr get decent gas mileage, and is a bored motor also reliable??

 

81.5 mm is basically stock.

 

Wold that change the engine to somewhere around 1.9L? I also heard that if you bore the engine your pistons and sleeves will crack... Is that a myth? So you're saying I should go with the GSR long block?

 

no. .5mm is a safe overbore on the stock sleeves. to get to 1.9L you'd need an 84mm bore.

 

Cool, thanx for clearing that up. Also, I think ill go with the gsr longblock ... I would put my type r head on it, but I don't think i'll be able to get it reffed here in cali if i do that, would i??

 

if the pistons are stock GSR, with the Type R head will raise compression. Passing the ref will be a hit or miss. Your Nx numbers will be up there.

 

hmmm, I could always go for lower compression forged pistons, such as je, cp... But since the head is a 2000, wold I have to switch the car to obd 2... Thats why I can't really do what I want, because if i use a 96+ motor, i'll have to switch the car to obd 2, which is a pain...

 

itr head would drop the compression

 

I'm almost sure that to be able to pass smog the car must stay obd1.

 

oops...i was thinking of the opposite h: (ITR pistions, GSR head)