I want to know if the garret gt2860rs turbos will bolt directly up to the stock mounting points? and if if takes any modifications to make them fit?

 

I believe Evoms GT28's are a straight bolt in or you might need headers... not sure. I'm sure one of the Evoms guys can answer your question.

 

They do not bolt on to OEM headers without modification. Either modify OEM flange on headers or fit aftermarket header.

 

Tial makes a direct fit turbo. with or without ball bearings and with water cooling (edited).

 

I have a pair of non-ball bearing ones if anyone is interested.

 

both (non bb and bb) are water cooled

 

Tial, can you outline the difference in spool times and flow for 2860, 2871 and 3071 models? I assume the 30xx models have significantly less backpressure?

Which would you recommend for the best spool / top end combo for a street driven car that is 99% pump gas? I know the spool / top end combinations are mutually exclusive, but there has to be a "best" compromise.

Finally, I understand that there are multiple housing options? can you help us understand all of it please?

 

There is no 3072...its 3071. But that's a good question, i am waiting to know that as well.

 

You're right, corrected.

Here is what I got from KPG: http://www.turbobygarrett.com/turbob...ison_sheet.htm

 

Yeah i looked at that one before. My research shows that the Gt3071 are capable of flowing 45lbs/min compared to 40lbs/min on k24/18g. Not 100% sure.

The Gt28 are comparable to the flow rates of 18g so would be about the same. I could be wrong , need someone to confirm.

The benefit of the tial GT28's over the k24/18g would be fast spool rates and wider power band.

 

As I understand it, the GT28 has the same performance (or VERY close) as the 18G as it has the K16 turbine. I do think however, that the GT28 will run out on top compared to the 18G as the 18G of course has the k24 turbine housing. So with the GT28 you get awesome spool and decent top end, with the 18G you sacrifice a little (and I mean a little!) spool, but get a lot more up top. For a street car light to light, GT28's rock Highway...rather have the 18G's. Just my .02.

 

Why are you going for the 3071 turbos? It seems to me you want the smallest turbos that can handle your max HP needs?

 

Smallest turbo doesnt mean fastest spool. There are several other variables. I think the 18g spools just like 16G.

Tony highly reccommended Tial GT3071 for the following reasons. These dont have the k24 hot side, they flow much more than the 18g's. They have the potential to make much higher HP if needed in the future. I got a great deal where the price difference between an 18G and Gt3071 brand new was not that much.

Plus these spool 500 rpms quicker than an 18g...i still need proof , but atleast that's the feedback i have so far and i trust my tuner. Ball bearing water cooled turbos and faster spool, wider power band...what's not to like other than price?

To be honest an 18g turbo with injector is the best and most responsive ((^ turbo i have ever driven. k24/18's are awesome turbo, just to have equal or better spool and higher power alone on ball bearing turbos is huge. That sold it for me.

My goals are to make 550 whp on pump gas (Dynodynamics) and 600+ whp with meth injection or race gas. To get there and have more room ...i cant think of any other turbo combination without sacrificing spool.

I want to be done with this turbo upgrade part now...i had the 16g's for 2 months...now dont want to go to 18g's and then get bored and go to 3071. Just want to do it once and be done. If i need more power in the future all i need is bottomend (rods and studs). Hopefully the price will come down later.

 

Agreed. BTW, tuning is the key. I ran only 1.4bar on these turbos and beat K24/18, K24/20 from 60-130 roll ons. Tuning is where the trick is but your statements are 100% dead on.

 

Absolutely agree. I think I have the fastest AWD 18G, 60-130 on pump gas, thanks to tuning and I have NEVER been over 1.4 bar.