white_sandshoe Posted July 6, 2009 Report Posted July 6, 2009 most engine builders are used to massive chev and ford engines where massive ports are necessary to add the massive amounts of fuel/air mix for the super inefficient engine.Similar rules do not apply for high performance modern turbocharged engines. Furthermore, the advances in turbocharger design and technology mean that smaller turbochargers can now spin up faster, producing more torque lower in the RPM range, with a larger area under the power curve, and a higher peak power than older and much larger turbochargers. Thereby negating the necessity to have oversized turbos and excessive porting just to be able to spin up that turbo to get the peak power figure desired. Thats just my opinion - i think there is a balance worth investigating that yields a much faster engine in real world applications, with a much more street driveable result..... rather than something that needs 4000rpm+++ to make any power. Smallport vs bigport - to be honest i think there is more in the turbocharger selection and manifold designs than the head that is used. Hear hear... In a lot of instances, provided you are starting with a nice solid base engine (big or small port aside) the power you want can be had with primarily bolt on performance parts, and just boost it up until you get where you want to be. Always a good idea to build a strong bottom end if you want to keep it at that level for an extended period though... Back to the original question... 3TGTE vs 4AGTE... gotta weigh up the pros and cons of each engine, and decide which is most suitable to you... 3TGTE= old technology poor factory turbo hard to come by hard to fix if something pops Strong engine stock turbocharged Strong box out of the box (W55) 4AGTE= Common... (that's a big downer in my book, a pro to others... like I said though, it is what suits you...) RWD conversion needed New head technology easy to source parts easy to mod to turbo if something pops, another 4A block is relatively easy to come by For me personally, I am going with the 3TGTE It's not so common, so would get a bit more interest under the bonnet, is turbo from the factory, so I can just copy what's already there when upgrading, it's got the W55 box behind it, so works real well for my goals of power and reliability further down the driveline, and is more of a challenge of my commitment to the project when building, as I've got to go further with my research and parts sourcing... but that's just me, and I like to do things the hard way... Quote
the witzl Posted July 6, 2009 Report Posted July 6, 2009 i've seen 3TGTE's and 4AGTE's that make 200rwkW... and the development required to get the 3T up to that performance level is much more than the 4A. IMO, the 4A has more going for it from factory that wont require modification/development to get it working well. The factory plenum, factory 4AGZE pistons ($400/set), and factory sump/oilling system are all very good. The 3TGTE otoh.... the pistons are weak, and forgies are recommended ($800/set), the factory plenum will seriously restrict performance at around the 130-150rwkW level (replacing with a decent volume front facing plenum netted one guys 20rwkW with NO other changes)..... and yeah the factory turbo and manifold is pretty poo. That said... a mate of mine made around 130rwKW on a stock rebuilt 3TGTE, with a 7m-gte CT26 replacing the stock CT20 and mildly ported stock exhaust manifold. The rest of the negine was pretty much stock... but used a microtech LT8. Horses for courses really. If i were to chose, i'd take the 4A. The amount of aftermarket bolt on bits is just awesome. Quote
Reaper_Mobb Posted July 6, 2009 Report Posted July 6, 2009 If you got the $ why not get a 2jz-ge? Apparently they can be pulled of 93 supras (half cut for about $1700+) and gets about 10sec on 1/4 mile but (and i am NOT the most knowledgeable about this so please feel free to slap me down) it would need a custom mount and drive train... and by the time you get everything and install it I’m guessing it would be cheaper to just get a supra... Anyway i think it would be nice to see and if you got the time and money why not? Quote
the witzl Posted July 6, 2009 Report Posted July 6, 2009 lol.... 10 sec 1/4 mile with an NA 3.0L..... yeah maybe a 10sec 1/8th mile. 2JZ would pose massive amounts of modifications required to fit it. For a start, the engine bay aint long enough. Quote
Reaper_Mobb Posted July 7, 2009 Report Posted July 7, 2009 lol.... 10 sec 1/4 mile with an NA 3.0L..... yeah maybe a 10sec 1/8th mile. 2JZ would pose massive amounts of modifications required to fit it. For a start, the engine bay aint long enough. yeah sorry your right its not na, it has a greddy t88 for the turbo... i should really check befor posting... :wink: and spoke to the guy... yeah HEAPS of mod... much cheaper just to get a supra :wink: i can post the specks if ya want Quote
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