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Kirk · 09-05-2008, 07:43 PM

I bet you'll find the TTP stuff is pretty expensive. I'm pretty sure that Gemballa uses their turbo system in their bi-turbo cars. Why go from 3.2L to 3.8L? Their 3.4L twin turbo may very well be near the same price but puts out 450 Hp. Would someone really need any more power than that? It sounds like they do it right too - lower compression pistons, head work, and intercooled. If the 3.2L and 3.4L are the same though, just with thicker cylinder sleeves in the 3.2L, then you'd almost be better off just dropping lower compression pistons in the 3.2L, don't overbore it, and crank the boost pressure up to still get 450 Hp or so. Unfortunately their 3.2L twin turbo system still uses stock internals (it's a bolt-on system) and thus would be prone to eventual failure.

Let us know what you find out! I'm going to guess they'll quote you $20K.

Kirk

09-05-2008, 07:43 PM	#5
Kirk Registered User Join Date: Jul 2007 Location: Texarkana, Texas Posts: 959	I bet you'll find the TTP stuff is pretty expensive. I'm pretty sure that Gemballa uses their turbo system in their bi-turbo cars. Why go from 3.2L to 3.8L? Their 3.4L twin turbo may very well be near the same price but puts out 450 Hp. Would someone really need any more power than that? It sounds like they do it right too - lower compression pistons, head work, and intercooled. If the 3.2L and 3.4L are the same though, just with thicker cylinder sleeves in the 3.2L, then you'd almost be better off just dropping lower compression pistons in the 3.2L, don't overbore it, and crank the boost pressure up to still get 450 Hp or so. Unfortunately their 3.2L twin turbo system still uses stock internals (it's a bolt-on system) and thus would be prone to eventual failure. Let us know what you find out! I'm going to guess they'll quote you $20K. Kirk __________________ 2000 Boxster S - Gemballa body kit, GT3 front bumper, JRZ coilovers, lower stress bars 2003 911 Carrera 4S - TechArt body kit, TechArt coilovers, HRE wheels 1986 911 Carrera Targa - 3.2L, Euro pistons, 964 cams, steel slant nose widebody 1975 911S Targa - undergoing a full restoration and engine rebuild Also In The Garage - '66 912, '69 912, '72 914 Chalon wide body, '73 914