Putting all things in perspective : I have 4 cars,
NA 90 Miata 18 secs, E350 Motorhome (with a 460) 17.8secs, 92 Turbo Miata 16 flat, 03 Marauder 15.1.
Ward Cleaver RULES!

Jackson racing S/C only push like 150ish whp. They are small blowers( I think like a m45???).... the mp62 however run around 200ish whp @ 10-12 psi and can run up to 300+ whp depending on boost. I have a FMII turbo @ 15 lbs. running about 250 whp. I can pull in the 12s but then again I don't try and run my car real fast in straight lines considering it was built for the twisties. I can run elise's all day long at MSR( the houston track not motorsport ranch) Turbo miatas are not slow... but for perspective on how fast it is in a straight line I beat my friends 07 Saleen ( non supercharged) and he has a intake and tune. I can take lightly modded evos and sti's as well.

i own a 1.6L.. and im running 8 psi... and mustang GTs are just no match for me... (i wont mention my modds.. wats the use) well .. unless they stock.. but the last 3 drivers.. i guess they didint know how to drive... but watever... mine is built to drift not be a ricer like most people

Bbdlo, Mustang GTs are 15.5 cars up here, so your jackson racin charger was just slightly more powerful than this guys air dryer driven miata. He promised me he was getting a new 60trim and that I would get to race him "before the snow flies" and its snowed the last two weeknds and he wont even respond to the thread HE started! What a puss! Here is the thread he challenged me in. http://www.slcstreetracing.com/viewtopic.php?f=19&&t=2440
Enjoy. See for yourselves, his car WAS turbo for all you people doubting.

He pulled a 2.2 60' but yeah, that is a 1.6L miata. This is a joke video because he talked a lot of crap on my turbo car but he cant even run faster then my n/a grandma car at high elevation (and the n/a car is HURTING at high elevation since it runs 14's at sea level Pacific Raceways). My turbo car trapped 20+mph faster then him on the same boost level (he is only running 5psi) but we didnt have video of that. This video was a lot funnier.

well for starters that is a 1.6 miata not the 1.8 . I had a 2000 with the 1.8 with a Jackson Racin charger on it and I was runnin with Mustang Gt's and givin a good fight...The driver might not have known how to drive and the hardest thing with a powerfull Miata is gettin it to hook up with street tires ..You def. have to bog it or they are jus going to burn...beleieve me ..I never got mine to the track but it ran good..Now own a speed 3..much faster

BTW where is my $500

You dont know what you are talking about do you? Tial .25 and .3 bar springs are 3.6 and 4.4 psi respectively................................................................................... Wastegates use diaphragms that require atmospheric pressure to function. Atmospheric pressure pushes on the top of the diaphragm when you have a real external wastegate. 4400 foot elevation means you only have 12.2-12.7 atmospheric pressure pushing on the diaphragm helping keep it closed (with the additional pressure of the boost spring). Once atmospheric pressure is reached (12.7psi) your wastegate will start to open when Pressure inside the engine reaches 12.7+boost spring psi total pressure. If you are running an 8psi spring, then 12.7+8=20.7psi total pressure in engine when wastegate is completely open. At sea level it would be 14.7+8=22.7psi when the wastegate is completely open. They dont teach this in corky bells book. You might want to read something besides turbos for dummies or you will keep getting yourself owned.

umm... no. Retard- boost pressure is determined by the turbo. PSIA indeed. absolute - whatever the reading is. the turbo will spin faster or else the wastegate wont lift. Theres no relative pressure with a wastegate. Its a spring at a determined tension level. Not biased on elevation. If your car is losing boost due to increase in elevation, you have some serious issues going on. do yourself a favor - go buy corky bells book on turbo charging, learn a couple things, and dont talk unless you have a clue what you are talking about. BTW find me a wastegate set at 4 pounds. Ill give you 500$.