Originally Posted by GTO2turbos
APS first design, which used better components (bb turbos, better oil return). The motor is all stock with the exception of a turbo specific cam grind. Meth is for partying with hookers, it's all fuel but at 11 psi I run 101 octane just to be safe. It runs fine on 91 at 9 psi.
Go to ls1gto.com to get feedback on the gen-ttr kit. It uses smaller turbos than the regular gen-tt kit in order get fit properly without headlight interference. Research carefully. No one beats APS engineering.
I'm a member...there every day. Don't know where you're getting your info from pertaining to turbo size in the GenTT vs. GenTTR.....the TTR uses bigger turbos. Both mount in the same location. Here's a link to the manufacturers web page. TTR Turbo is a god bit bigger. There is a photo that shows them side by side. http://www.ls1turbo.com.au/genttr.htm
The GenTT kit uses KKR330 turbochargers, and the TTR set up used KKR380s up until now, they have just been revamped with bigger, better turbos.
Each set up has their strengths an weakesses, it wouldn't be right to say one is BETTER than the other. Why do you think APS is better? If your argument is that they are away from the engine bay/heat....then one could also argue that they are in an area that is suceptable to water and road grime/dirt/ and debrit. There are plenty of GenTT car in Ausralia running 140+mph traps.
Not trying to say the Gen-TT systems are better....just that each has it's strengths and weaknesses.