I lost my job a couple years ago and left town. I parked my miata at a friends and during that time it got neglected. I recently moved back and started tuning it back up. I noticed some smoking and did a compression check. My compression is terrible in the 4th cylinder ~70-90. When i do the wet test it goes up to about 125-150. So now i'm faces with a decision and here are the factors.
My car is a 1990 with a long nose 1.6. I have a 2560 Garret, IC, MS1, 460cc inj, torsen out of an early 2000's miata. 2.5" Exhaust . My turbo mani is a bell log style & i have an S style downpipe. Wideband is an Innovate LC1.
I don't want someone to make a decision for me but i'd like some perspective. I've looked around for some replacement motors but all i seem to find around here are 1.8's. I can pickup a 95 1.8 with 140k on it for $325. I can pickup a 99 with 90k on it for $400 or I can rebuild my 1.6.
I'm not afraid to get my hands dirty but I've never rebuilt a motor myself. I know everyone says put a 1.8 in when given the chance. If I do put in a 1.8 then I will need a new turbo mani which is ~400 + 170 for the fm kit. im at ~970 before fluids and misc. Should be pretty easy to sell my old mani i guess right? I'm kind of uneasy about buying the 1.8s because they aren't in running cars and I can't run compression tests on them. I have never done a leak down test nor have the tools.
Is a rebuild something I should consider doing myself? I have some body work and painting i need to do to my car as well. I'm not restricted by budget but would like to be practical.
The 99 motor I was told was out of a front end collision and before the guy bought the motor it ran in the wrecked car and that was about 2 months ago. He planned on putting it in his miata but decided to sell it because he's moving (or so he says).
something worth noting. this is not my daily. I have an A6 4.2L Audi