TheShodan

iTrader: (14)

Most "Cast" tubular logs from Go-Autoworks or Spoolin' performance can work, but are rigged for external wastegates.

The GReddy cast manifold works wonders over even the Go-Autoworks or Spoolin', and can easily fit the T25 flanging of a GT2860RS or GTX2863R that they can give. Internal wastegates can work just fine for the level of power and instant torque that you're looking for.

Toss the cartridge in the garbage. Keep the compressor cover and turbine housing. There's nothing neither you nor he can do about it. Especially since the turbine wheel experienced Foreign Object Debris.

Since you're planning on going turbo anyway, most intercooler kits are designed to work with the engine bay as though it were a B16. So, my suggestion is a simple Skunk2 Pro Intake manifold made for the GS-R.
The nice longer runners help with a good torque band. Keep it simple by keeping the stock throttle body.

wantboost

iTrader: (2)

Or let me have it for my broken turbo collection for inspection lol

bdavis

Thanks Shodan. I completely forgot about the Greddy manifold. I though I was stuck with a T3 based housing.

In my opinion, a larger TB isnt required until power levels beyond my goals. Beyond that, I can fab up the charge pipes as needed.

The search is on....

wantboost

iTrader: (2)

I do have a Greddy b series manifold. However I need to finish porting it

LightningTeg

You can find the Edelbrock T25 manifold that came with their kits for $100-200 brand new. Just need to search/ Much smoother collector merge and much less restrictive "looking"

TheShodan

iTrader: (14)

That's true. Although most kits sold from Edlebrock were D-series, and rarely ever was the B-series version ever sold.

*Edit* you can also try for the HKS T25 cast manifolds, but those are equally rare.

If all else fails and you still want to T25 setup with the choices, you can always ask vendors like Spoolin' Performance or Go-Autoworks to see if a tubular log can be made with a T25 weld flange. No wastegate to worry about. It would just be a matter of e-mailing them and paying for special order.. That's never a bad idea.

LightningTeg

Back in 2010 I was able to find a vendor selling just the manifolds. Cant find them now. But If you could find the edelbrock part number for it, that would help tons. The kits arent even listed on their site anymore.

wantboost

iTrader: (2)

I can't find the part number anymore, anywhere.

bdavis

Thanks for the help guys.

It appears that the gt2560 is only offered in a t25 exhaust flange. I think a t3 flanged turbo would start to grow in size and reduce spool, however that could open up options for larger turbos in the future. I dont have anything against a log manifold, but I am afraid that a welded log manifold would be at greater risk for cracking over a cast manifold. However, if there is evidence to the contrary, I am willing to head down that route.

Also, I can't find map of a GTX2560 or anywhere to get them. The GT2560 is relatively cheap at around $900. It seems to be a pretty good match. The only downside is the flanges on either side of compressor. They are just harder to work with than the "tube" style.

Shodan, if you have any suggestions on some weird hybrid turbos you whip up, feel free to contact me with some ideas

Thanks
Burke

TheShodan

iTrader: (14)

There's no "greater risk" of using a 304L Steel tubular log over a cast iron one. In fact, the tubular logs are easier to repair than some of the cast ones, so, there's no worry there. I'm not sure where you're thinking that particular logic, but if they are both ill-made, regardless of type, it will crack. The key is to simply purchase from the right vendors for it. Such as Spoolin' Performance and Go-Autoworks to name the more popular ones.

The GT2860R is T25, and you can go all the way up to GT30R size in a T25 flanged system. It won't effect any real power limitations, but it does limit some options in case you do want to go larger. But it is best to crawl before you walk in this case.

Now, The newer GTX28R series now offers T3 flanged turbine housings, but they are typically 2.5" T31 4 bolt turbos. You can use THAT as a starting point, then if you want to go larger in the T3 family , you can still do so.

You won't get the standard T04B until you get into the GT2860RS sized setups. The GT2560Rs were mainly made as Nissan SR20DET upgrades.

The GT2860RS starts coming in at about $1100.

Nothing to "whip up".. the choices that everyone presented are as good and responsive as it gets. ..

DC_Legacy

Just my 2 cents but for the power range and spool characteristics your looking for I would sell the GSR head, go back to a P8r head and throw some Crower cams in it with an Inline Pro and a disco potato......you might think im crazy but look at dynos on Evans Tuning of B20 and LS setups in that power range, you'll notice that many of these are quick spooling torque monsters that have very decent low-midrange powerbands and for under 300whp vtec really isn't going to make a big difference imo

TheShodan

iTrader: (14)

That's due to the additional 89mm stroke of the torqueband more than the cylinder heads, which tend to allow for a bit more backpressure, similar to an older 4G63 engine. The point is to stay very small on the turbine wheel for maximum torqueband.

LightningTeg

Like was said, the stroke is where the LS gets that torque from. The GSR head will bump his compression, and with the stock cams will have just as much Low end and better top end. IIRC, even the Crower 404 profile is almost identical to a stock GSR vtec lobe.

Stopsign32v

iTrader: (1)

Would a GT2876 not be a good choice here? I'm curious of the different between the GT2876 and the GT2860

bdavis

So I keep thinking of a GT2860RS...... It looks to be a decent match with some more headroom in the event that I'd like some more power for ice racing, etc.

Am I correct that should probably shoot for a .48ar? I can't seem to find a .48ar with an internal wastegate. If I want one, it looks as if I am limited to .63ar.

Thanks
Burke

TheShodan

iTrader: (14)

The .86a/r t25 is equivalent to the .63A/R T3...

The .48a/r T3 is equivalent to the .64a/r t25 volute

bdavis

Perfect! Thanks again for all the info!

wantboost

iTrader: (2)

No it's a giant mismatch. The gt28 turbine wheel can't even flow enough to fully utilize the 71mm compressor wheel, the gt30 turbine wheel can't even flow enough to fully utilize the 76mm compressor wheel hence why Garrett released a gtx3576r.

The 2876 works on a few setups but nothing in the Honda world.

B20VtecVillain

Haven't fired her up and started tuning yet, but I just finished fabbing up a system with a Full Race Prostreet manifold and GTX3076r huffer. Will let you know results on my high comp B20V but my tuner and I are expecting excellent TQ from the setup while still having gobs of top end thrust.

TheShodan

iTrader: (14)

mmmmm. I wouldn't go that far. Not to burst bubbles, but that was exactly the problem of the GTX3076R; Lots of great looks on paper with similar top end to a TR3030R or GTX3071R. This is where the GTX3576R really did better. Same compressor wheel of the GTX3076R with a better match using the N32 68mm turbine wheel from the GT35R. But still responded similarly on a good 2.0 litre displacement. Especially if going over the 500whp+ mark.

Here's a bit more information about the comparison..

Garrett Releases GTX3576R Turbo GTX35R.

If your unit is new.. Trade up, if you want the top end power associated with the midrange torque you're looking for.

LightningTeg

So is the 3030 closer to a 3071?

TheShodan

iTrader: (14)

No. The 3030R is an extension of the GTX3071R. Which is completely different from a simple cast GT3071R.

By "extension" I mean that it takes the great combination(with its 20% differential) of the GTX3071R with the N111 60mm exhaust wheel and heads to a better torque output level. Without going so far as to mismatch itself like the GTX3076R did.

liam821

The gt28rs (aka gt2860rs) on a 2-liter would give you amazing throttle response and has a flow capacity of about 350HP. You can get it with a t25 or t3 flanged. ATP also sells a vband flanged version as well. If you want a cheaper option, the T3-super60 (t3 flanged obviously) has a very similar turbo flow map as the gt28rs - and you can get one for half the price of the gt28rs.

I run a super60 on my b16a powered timeattack race car and the throttle response is excellent. It put down 230whp/190# @8psi of boost on the dyno, I run around 10psi these days or about 250whp. The powerband is from 3500-9000rpms. Anywhere in the powerband you can put your foot down and have power, it's fantastic.

My favorite part is the torque, it makes over 190# torque from 3800rpms until redline, on a b16a...

Here is the turbo maps for the two if you're wondering.

gt28rs


t3-super60

LightningTeg

It's almost like a factory turbo car.

TheShodan

iTrader: (14)

Actually, the factory turbo cars use even smaller-framed compressors that are under 26lbs/min in the KKK K03 and Garrett GT17 setups. Those listed by liam821 are actually considered to be "big" turbo upgrades in a lot of the FocuST/FiestaST, Cobalt SS, and even Neon SRT-4 and Audi A4 vehicles.

Hell, even the new 2.3 litre Mustang uses a GT2252, and that's tons smaller than the GT2560R., and even they want to upgrade.. so I wouldn't put too much stock into that type of thinking completely; you're going so small that peak torque won't get past 2500rpms and tapers down from there. Its not as all exciting as it seems on paper.

They all share in common that their cylinder heads are not nearly as efficient as even a bone stock B-series VTEC. This is why I recommended what I did, and still able to keep torque.