the cold side on the turbo is i believe a 0.63 and hot side is 0.68 its a pretty descent turbo and from the specs online and all the forums i have read alot of people run this same turbo because of it spooling faster...i have not dynoed it yet looking for somewhere to get that done...im looking for around like 395-400 only reason is because they have an eclipse at brotherz racing right now with completly identical setup pushing 400all day long if you go to Brotherz Racing | Home its on there its the black eclipse...the cams the reason i went with the 272's is because they have better upper rpm's not good from a dig but like a 45-50 there straight only if i could figure out how the hell to get the car past 4g's without it wanting to die out... just some questions could it be fuel cut out, spark or like a vacum leak... just needing somehelp and the only reason i got rid of the lude was money wise and i didnt pay shit for this car i picked it up on a steal 2,000 not bad i got like 1,500 in reciptes for motor work alone...