Howdy all.
Im boosting my stock C4 (same as your GSR).
I had planned to run a T3/4 57trim .60/63 however talking to a mate who has built several fast Hondas before, he thinks itd run out of steam top end. And hed run a GT30.
Aiming for 350hp and Ill be running a miniram mani, 3" downpipe and exhaust, stock rev limit and car is used on the street and 1/4 mile stuff.
No future plans for more power either.

Ive looked at compressor maps but quite frankly, Ive no idea what they mean and arent clever enough to read them.

So whats the verdict? T3/4 be good?

Thanks

 

57trim turbo would work fine for that power goal.

Personally I'd aim for a 56 trim GT2871, or 2863, or even an EFR 6258 depending on what your budget is and how much if any growth you think you'll want in the future.

 

I dont really have a budget but Im very aware that its a stock build. So I dont really want to be spending thousands on a turbo.
​​And once done, thats it. No further plans.

 

GT30 is overkill. Go with your original plan.

 

I'd use a T3/T4 50 trim before I would the 57 in this particular scenario. It basically costs the same (or close enough) and would spool quicker/make a wider power curve. The 57 would eventually make more peak...but you aren't near that area w/ a 350hp goal. (this is assuming you are referring to and wanting the "classic" Garretts)

 

Yeah, the classic Garretts is what Im talking about.
Will the 50trim still boost to redline? Same size wheels?

 

"Redline" isn't the real concern when it comes to what your doing, but the short answer is "yes" to that question.

The difference between the 50 "trim" and 57 "trim" is the compressor inducer. TRIM is a calculation between inducer and exducer of a given compressor or exhaust wheel . That's it.

Although the 50"trim" is slightly smaller in inducer diameter the design has a much better broad powerband than the 57"trim". Bigger of not always better .

 

So, Ive asked a couple of companies for a quote, but am being asked what size inducer compwheel Im after.
Any clues?! Im lost!

 

Quote for what? A Price? Perhaps you're searching for another word, if they're asking you what specifications that you want your wheels replaced with. Can you be specific as to what you mean by other companies and their "quotes?"

If you're only giving them the term 50 "trim", then there are several hundred applications both in OEM and aftermarket performance that has a 50 "Trim"...
It's simply the difference between inducer/exducer of the compressor and exhaust wheels.

 

Yeah, Ive been asking for a price.

 

A price on ... Which turbo that meets your power requirements (based upon engine displacement, fuel being used, CFM bench flow test for the cylinder head, turbine flange size, camshaft, budget & purpose of the car)? If that's the case, they wouldn't ask YOU what inducer/exducer wheels you needed. they would have suggested a few choices and you go from there with your decision.

I'm only going into this at length, because I've found that many who are in search of turbocharger choices, tend not to ask the right questions (usually, through no fault of their own they don't know what questions..to ask in the first place.) and depending upon the experience of the person who you're speaking with (which are usually the sales team) you'll get a "popular" turbocharger that is usually too large for the power goal, but because they have a lot of them on hand, they'll suggest it to you just to get another one out of the door, and don't necessarily get into what it is you're looking for. Ya know?

So, I'm just inquiring about this so that you know indeed what to ask.. If not, Take a look at the FAQs highlighted in Grey at the top of the forum. the first few videos talk about specifically what to ask, and how.

 

Agreed w Shodan on above 2 posts.

If you are asking for a price quote on a Garrett T3/T04E 50 trim specifically; then the only question left really is what turbine housing a/r, bolt outlet, and bearing type.

Out of curiosity, who did you call for a quote? Why them?

 

Hint: This guy (Autoworks) can both give advice and get you any turbo you decide on. Go-Autoworks also sells a very nice mini-ram kit

 

To be honest, I didn't know there was more detail needed.
I trawled the build threads in search of a turbo, that had good results on a stock engine.
Several people had good results with the Garrett in question.

When asking for a price, I asked for a T3/4 50trim, .60/.63, as thats what people have talked about in their posts.

I asked TurboDynamics and a smaller company local to me who are Garrett dealers.

 

Ahhh. It never occurred to me that you were Go Autoworks.
Ive enquired about your miniram here in the UK but the only dealer I can find only sells your full kits, not the fanimould on its own :/

 

Thanks, feel like I can't "directly" say anything like that here ...but since you brought it up...
I don't think you can search and narrow a question like that down on here; it's pretty broad. The forum has been around for so long w/ SO many users doing similar things a million different ways now, you'll literally get hundreds of different answers.

Maybe it's a little different over there. Here, if someone asked for a Garrett T3/T4 50 trim specifically, then all I would need to know is the a/r (.48 or .63), turbine outlet (4 bolt standard or upcharged 5 bolt), and bearing type (standard journal or upcharged BB...where if you are the 1% that wants BB for the cost then I'd then suggest something else [GT30 etc]). Asking the customer about ind/exducer would really overcomplicate the process. I would be more interested in the power goals/usage/build specs if you were looking to be helped with a selection.

You can always order direct if you like. The international dealers have been narrowed down this year. Some do that due to shipping costs. It's just easier for them to work out freight on larger items on their end.