1. Have stock turbo, downpipe, top mount, intake, exhaust, coil overs, tune nothing to severe. Curious of any other upgrades or more safe mods than adding injectors, bigger turbo...or something less expenisve to do?? Possible front mount or e85 tune?? Also, I assume a few backfires and (idle when start- for 2 secs is low) is due to tune/oil pressure?? Any thoughts? Also, if shifting down to 4th @ over 40mph it grinds.....ITs strange that just that with the speed as well?? Thoughts? Anything you feel i should know or do please let know
Grimmspeed boost control solenoid is a good mod, but it does require a tune (it sounds like you might be in the market for one anyways). Did you have the tune done or was it the previous owner? Do you know who did the tune? If it were me, I would have it tuned by one of the local tuners if you do not know who did it the first time around. http://www.grimmspeed.com/catalog/product_info.php?cPath=60_68_69_152&products_id=145
^ this You should not have any backfires or any other ill-effects from a proper tune, get in touch with NF performance or Bullwinkle for a good tune
I don't know about mods being 'safe', especially beyond stock lol Your trans will grind, synchros slowly going out. Try swapping out the fluid.
