I'm always going through a list of performance mods and calculating the dollar cost ov the mod vs. the horsepower gain.
for example, the Turner/Conforti chip I bought new on ebay for $37 bucks with shipping; if the chip is worth 8 hp, and i can do the labor for free, (yes) then, the mod cost me $4.62 per horsepower.
Do a cold air intake with a cone filer and get 6 hp for about $100 then you have a $16.67 per horsepower mod.
Buy a good muffler, for $60, replace the over 100k catalyst with a hi-flow spun metallic type for $100 and have a good shop weld it all up with a nice smooth pipe between cat and muffler for $75 , plus a 10 muffler tip, and get another 8 horsepower, for $245 and you have a $30 per horsepower mod, and something the old car probably needed anyway. Maybe good plugs ($25) 8mm wires ($170) and new coils ($180) are worth a few hp for $375, so thats about $100 per hp if you do it yourself, and again you probably need plugs wires and coils with over 100k miles anyway
Schrick Cams?
$449 each from Korman, $900 and I really want a good shop to do this bad boy, since If I F' this up its the motor, so I'm into also a valve cover gasket and ..., this is going to be a $1200 mod, on a car I bought for $2200?
Dude, Did you max out your 401k, your Roth IRA, do you already own your own home, AND snap up a deal on some foreclosed real eastate, Hire a personal trainer to work of the gut we all have, Rent some really fine women buy the hour, AND go to Europe or Asia or Latin America on vacation,
AND AND AND still have money left over to throw $1200 Schrick Cam work at your 19 year old E30is which the dealerships wont give us $1000 in trade for a new BMW128 coupe.
This car costs me as much per month to run and do performance mods as the monthly payments on a new BMW 128i coupe on Euro deliver with the BMW CCA discount ($28,000 with sport suspension)
If I had not lost my business, and credit rating, Thats what I'd be driving NOW.
The E30, 318is is a fun little car, but its not going to ever get the hot and fancy chicks like a new BMW coupe (or a used boxter or....)
Call me crazy, but;
Hell the economy is in the TOILET, maybe I just wanna hang onto my $1200 for when I get laid off and the rent is due.