Originally Posted by davidnormanuk
What boost can a standard bottom end take without any mods. Also what boost can a low comp bottom end take on standard rods. The car at the minute is running spot on but is just a laggy would an uprated cam be the way to go to help that as I am on a new standard cam which is what I was advised to get due to the bigger turbo. To be honest I don't know what to do for the best as I've had alot of hassle getting this car right since the conversion and now its right do I want to start messing with it again.
Cheers
Dave
Not speaking from personal experience again but i have seen evidence of people running up to 18psi on a standard bottom end as mentioned above.
A different cam is likely to make it more laggy, combine it with the bigger turbo like you've got and you lose whatever driveabilty you had with the engine as standard, you need to ensure that the engine is set up right to make the most of it though, there is no reason why a mild upgrade on the cam would be noticeably different off boost if for example, your cam timing is out now, and when a different one is fitted the new one is timed in accurately with a vernier pulley.