Thread: Holy Sheet!!! New Turbo!! Videos on pg 4!

I dont agree with your reasons for oil cooling being better. But each to there own i guess.

I have run a standard t28 and a gt2871r and have never seen or heard of the problems you are talking about.

Again proof is what i want to see otherwise its just the same as guys claiming a gt-rs is different. I want to learn something here im not taking a dig at you. It just intrests me if the turbo really is different.

Heres a chart i was going off.http://website.lineone.net/~jon_ed/Turbo_Table.htm

Clearly according to this guy a td05SH 18g is the same. I dont know exactly what that ebay turbo is but the guy clearly states the turbine wheel is slightly smaller.

Sounds to me like the ebay ones are 18g compressor with a small 16g turbine.

Whereas the SH 18g has the same specs as a t518z.

I also dont agree with those reasons, i have never had any cooling problems with dbb turbos both gt3582r and gt2871r never had any problems, both in racing applications as far as cooling is concerned OR in traveling in hot summer days for hours, never any cooling problems.

having a coolant cooled turbo is a benifit as with better cooling capacity radiators, larger more cfm ran fans can cool the coolant more efficently making the coolant both cooler for the engine and for the turbo thus decreasing the heat going through the turbo increasing the life of the turbo,also performance thermostats can have the cooler coolant running through the turbo earlier cooling it off more efficently, and if you have a software based ecu you can have the fans turn on at a lower degree increasing the cooling efficentcy of the motor and turbo, to me there is no non benifit of having a water cooled turbo.

DBB turbos are garrets top of the line turbos, they wouldnt make them so if they were both efficent in cooling in both oil and water and in power. its that simple i think

ts not that simple, or you could use that same argument for trust turbo's...trust top of the line turbo's cost more than garret and they wouldn't make them oil cooled if it wasn't the best blah blah blah

both methods have trade offs and possitives and both big companies have chosen each design for a reason. You are welcome to dispute the reasoning and choose which one is best for you. I have chosen a different design to both for my own reasons

ill try and dig up my specs on the t518z or trust td05 vs th mitzu and ebay ones

LOL here we go with the magazine racing again! WHy are we even speaking about the T518z?? THis thread is about a Greddy TDO5-18g. Nobody here is running a T518z so why are we even talking about it??

Austin there are TONS of 18g's out there. Some water cooled some not. Im not sure what ebay 18gs your refering to. But were talking about a Greddy Td05-18g turbo with an 8cm wheel.

I could really care less if the turbo is oil or oil and water cooled lol. It works and it works well. Greddy designs there turbos how they want to and Garrett designs theres how they want to. They both work. On the greddy you dont have to run a restrictor or anything. My water temps stay alot cooler then they did with the Garrett turbo. My oil temps dont get high either while running high boost. But I guess we could chalk that up to the DE's and DET's built in oil cooler.

well back to topic, how much pwer do you think you are putting down now with your current boost? have you dynoed it yet? to compare between before and after, it would be cool to see a before the turbo and after to see the gain, not sure if you dynoed the car now or before tho

^^the greedy td05-18g will have the same wheels as the t518z, but the mitsu one and cheap ebay coppies wont

i was reffering to trust t518z or even the trust td05-18g vs the mitsu one, sorry for the misconception

so your chart is correct

sorry jonny wang if i turned you thread into a magazine race, i was just agreeing with your decision of turbo and stating some of the reasons why it was a good choice. And obviously you have already seen some of the benefits of the design.

Im lost? My Greddy has a Mitsubishi Sign clearly printed on it in a few places.

GT2871RBLUBIRD- I havent dynoed the car with the T25 I had on there or the 18g. Id say im putting out around 350whp at the 18-19lbs (It doesnt touch the 20psi mark I had to look the other day but its hard to do when redline comes so fast) of boost im pushing since I can max the injectors out doing that. With S4's I should be right around 380-400whp with 23-24lbs of boost and 100octane. I honestly probably wont even get the car dynoed since I know about where the power is anyway. I tried to get a video today. But nobody I know with a recorder is availible!


*Edit* Ca18 its all good. Coversation is conversation. Please Dont let me stop yall from discussing. You were one of the ones who told me to slap the turbo on in the first place! Im just trying to let everyone know that there are tons of different 18g's out the with tons of Diff wheels so you cant really compare one to the other.

^^^ yes it will, like on the housing ex sice and chra but that doesnt mean the wheels are the same

the greedy turbos are based on mitsu ones


*edit*

hahaha cool, funnily enough our points are somewhat similar, as the reason for my writing is that there is a difference between td05-18g's and you cant expect to buy an ebay 18g and expect 400whp with crazy good spool because you have seen the success on the greedy units. They still might perform quite well, but there is small differences made buy greedy with their turbos.

i like to look at it this way, a properly set up turbo on our motors will do wonders, A proper size turbo will for the most part always outbeat a huge turbo setup that has oh all of 2500rpms of real powerband, I think the gt2871 is the all around best turbo for our motors, they can do wonders at a very low boost level and have power from 3200rpms all the way to 7700rpm rev limiter. A big turbo will hit hard at 5k then spin the crap out of the tires for its whole 2500rpm band. This is way a nice setup turbo will beat a big turbo 9 times out of 10. Look at my car, On my old T25 setup i was smoking srt4's with 50 and 60 trim turbos boosting 25-28psi of boost making around 500whp, you want to know why, for one power to weight, two they have a power band of again about 2500rpms maybe less on those motors because they dont rev as high. Now same goes with sti's, evos, ive beaten several big turbo cars all because i get momentum going alot faster and i stay in my powerband.

This s15 t28 has a very nice powerband compared to the t25, its only running 9psi right now also and it whoops my t25 at 18psi spike and holding 12-13psi pretty bad. Not to mention above 6k is where this turbo really shines over the t25, as the t25 is dropping well out of power the S15 BB T28 is still gaining in power making peak at 7200 all while still making more power than the t25 everywhere else. Ive yet to turn it up as im waiting on my injectors to arrive so i can throw some 100 octane and 20psi at it and really see what this turbo has to offer. I think even the initial torque of this thing should be reletavely close to the 18psi spike of the T25 but much safer due to alot less heat.

In conclusion a proper size turbo in my opinion is alot better than say a big t3/to4 or gt30-35, I think the 28 has the advantage.

^^True since greddy uses Mitsu turbos. Im thinking the wheels in the T51whatever the hell and the 18g are the same though. It just that the comp housing of the T51 is smaller and its probably greddy designed or something instead of mitsu. They probably needed a housing that could fit into tight spaces on some cars so they had to design one. I had to grind my block down a lil bit to get my 18g to fit