Yea i guess, i was just thinking max power with good spool. 2.3 w/a 3076 would be a killer combo...and then add the alky

i wish i had more money

 

put a .82 on it, and i think so too

 

How much do your kits go for? If the 20g-9 doesn't work for me im going all out....

 

Garrett now makes 50 trim Dual BB center sections (replace all the t3/t4 style turbos). This is a graph of that turbo. The stage 3 also uses a better flowing 10 blade wheel. The old ones where 11 blade. 500whp/ 530 tq is awesome from a stock head, stock block, stock intake, stock cams, srt4. Fast spool like this can be achieved with a 2.3 4g63. and the 2.0 only adds 400rpm lag. Setups like this are a blast to drive on the street. Its not always about what happens at 6-8500rpm. Some people like fast boost response and massive torque.

Geoff, you come from Honda camp where torqueless setups are the norm and acceptable. Your posts are gearing people to laggy setups. I hate lag and have had 10 turbos on my own car finding the best response.

 

I think I posed the question back on the first page about the 50 trim being called a 50 trim and received somewhat of an answer (thank you!) but I only asked hoping someone would realize that a 50 trim could be any one of hundreds of turbos. Trim only describes the relationship between the inducer and exducer. I'm just not understanding why we don't use the compressor's actual designation (60-1, GT28, whatever it actually is) because I still don't know what compressor the "50 trim" is! I get the whole T4 cold side mated to a T3 hot side. I saw someone mentioned a 76mm compressor but I'm not sure if that's inducer or exducer. Any info appreciated.

 

i agree with the fact that torque and response are wonderful, but to characterize me as that is a bit wrong. My 1.8L civic made 610 ft/lb of tq.

 

i think you should understand that when people talk about a 50 trim, they are referring to a t04e comrpessor wheel, 50 trim is the size.

2.122" inducer
3.000" exducer

rated at 47 lbs/min

has a 78% efficiency island from 18-34 lb/min and from .5 to 1.5 bar boost. Very good compressor wheel based on older technology. Unlikely to outperform a more modern and more aerodynamic GT30R setup.

 

When?

 

Geoff, you seem very knowledgable and perhaps you can shed some light beyond the theory to what is actually happening in practice.

Just from me parusing the dyno sheets and reading up on the subject, it seems 380-390 whp dynojet is just about the average for a GT30 on pump with the common upgrades (tbe, cams, etc). Yet, the Turbotrix 50 trim setup appears to be doing slightly better. They say most of their kits come in somewhere around 410-430 on pump. Now idk if its a dyno difference thing or what, but it seems that there is a trend emerging.

Going to race gas, the turbotrix turbo seems to push 470-490 like clockwork. I wouldnt say thats appreciably below GT30R rumbers on race gas, if at all. Now im not a turbotrix fanboy, and im not trying to push product here, im just trying to understand why a lot of tuners say the 50 trim isnt as good as a GT, yet a significant number of 50 trim cars a putting down awesome numbers, great spool, and swear by the thing.

Perhaps you (or anyone else) can comment? Much appreciated. Again, just trying to take in good info.

 

it holds 800whp for ~2600 rpm

it gains 500whp in 1000 rpm

 

If you are only seeing 380-390, then i would say there are some serious discrepencies.

Is it possible that the turbo kits using this setup are not using very good manifolds, properly designed downpipes, etc.? Is it possible the tune was off? Is it possibel the turbo had the wrong turbine housing? Maybe the car had a cat?

There are a LOT of variable to consider when looking at overall power output. A power rating on pump gas is really worthless, as it depends on how much you are willing to risk the health of your motor? One guy who worked here ran 30 psi on 91 octane on his SR20DET. It ran great for 3 weeks, then he got some bad gas and melted 2 pistons.

I dont think there is a trend emerging here at all. I think that the data that is out there is very skewed and not at all indicative of any trend.

 

Fair enough, thanks for the input. That being said, do you feel that on the exact same setup, a GT3076R (with the hotside you prefer) should outperform the common ball bearing "50 trim" over the entire power curve? ... i.e makes more power sooner and holds more power longer...?

 

i have been trying to figure this out myself for months!! everyone says the 3076r is better choice, yet the numbers never back it up. there are a couple of TT 50trim guys on here that are make excellent power, 420-450whp on pump and 470-500whp on pump and alky. now i have not seen any gt30r's make these type of numbers. im just wondering what else other than "technology" makes the 30r better? the numbers dont. does the 3076r hold boost better etc?? definitely appreciate helpful info.

+1, its one of these turbos for me or the evo9-20g on pump and alky.

 

Yeh, but at what % of redline RPM? If redline was 9000 and it made peak TQ at 6700 (74%), it wouldn't be very useful for anything except drag racing.

An average EVO with a 2.3 stroker making good power on a mid-large sized turbo makes full boost around 4500 with a 8000 redline (56%). This will be much more useable power and a pretty good all around car.

Beware - talking people into a turbo too big for their intended use will lead to unhappy customers and may even leave them for an unnecessary distaste for the import scene.

EVOlutionary

 

Ummmm How can you Compare the Neon to the Evo ? And a 50 Trim on a 2.4 of corse if going to make a ton more power sooner than a 2.0 thats why half these people stroke there motors. These two motors that your comparing are completely different from eachother. in no way shape or form is the SRT4 head a free following head like the Evos. and it certainly isnt on the same level. I speak from experiance i had a 50 Trim on my Srt4.

I just dont think your arguement is valid. your Comparing apples to oranges.