juggernaut1

Some comments on GTX3576 vs GT3582 .5 cover (F6 turbo) from a FordXR6Turbo thread I have never used a gtx3582r.. I personaly think and my tuner would agree that the gtx3576r is really more like a 370-380rwkw turbo.. We had to push it to make 400rwkw and squeeze the sh*t out of it to go 430rwkw. really this turbo was happy a 380rwkw.. I had 403rwkw with the standard F6 turbo.. Its hard to say what I liked better.. the gtx3576r is punchy and extreamly strong thro the mid rang.. But then fall over a little up top.. If you want a punchy turbo for street use and not worried if it doesnt make 400rwkw then id go the gtx3576r.(could be happy making more on E85) would pull some impresive 60fts with ease! If you want more I can only recommend the standard F6 turbo as I havnt tried the gtx3582r.. Mine with f6 turbo at 400rwkw felt like a jet though. Pulled hard to redline.

Yes the HTA3582 is my first choice - however just awaiting a response from Forced Performance as to whether they use the superior GTX bearing cartridges.

Lith, the stock turbo on the FG range is a Ford spec'd 3576 with .5 cover which has been downsized from the earlier models to reduce lag. The 3582 with .5 cover is now only found on the FG F6 range. So the GTX3576 is a higher flowing turbo than what I have. Yes the GT3582 does make slightly more power than the GTX3576 and the compressor maps suggest this should be the case. From my reading of the various ford forums the GTX3576 is appreciably more responsive than the GT3582 and those using them on their Falcons rave about them but do note that the power does fall away up top whereas the 3582 has a few more legs. However, for a street car I'll miss the responsiveness more than the power in the top part of the rev range and prefer area under the curve in that part of the rev range I mostly use. Getting to the heady power levels you talk of, whilst easy to achieve, requires a rebuilt ZF with billet shafts, uprated tailshaft and valve springs which are additional costs I'd rather forgo.

450 -500 is gtx 3582 territory on e85 on a stock ford and generally 400 plus on 98. In any case is far more than I am wanting from my daily which has to pull my boat.Happy to step it down to the gtx 3576 for bit less.

Yep only looking for a small upgrade....not really looking at more than 400rwkws on 98 with minimal mods.

I sent them an email today .......so will see if the response has changed. Am hoping they are using the gtx cores. I was looking at the hta 3582 or hta 3586 for my G6E turbo. Otherwise the GTX 3576 would be a punchy performer on the falcon motor.

Quick question - does anyone know whether the HTA turbos use the Garrett cores with the metal bearing cages which I understand are used in the GTX turbo's or the plastic bearing cages as typically found in the traditional GT style turbos. http://garrettbulletin.com/techcorner/garrett-by-honeywell-ball-bearing-turbochargers

E85 and other variants have probably reduced the dependency on twin scroll systems somewhat. This and twin scroll setups are still likely to cap peak outputs....which is no good from a marketing point of view. Still prefer a twin scroll setup myself on a street car - coupled with E85.

I'm not sure whether the HTA 73 is similar to the 3076 52 trim - but FWIW I changed from a 3071 to a 3076 52 trim - both with the .78 twin scroll rear on an SR20 and found the baby 3076 to be far more responsive than the 3071. However my caveat is that I had replaced the 3 inch dump and exhaust for a 3.5 inch dump and exhaust when fitting the baby 3076.

JustinP, I've got about 9 litres of Penrite running in oil (15-40) you can have if you want it. Just PM me if your interested. Cheers

Might have misguided you with my previous post ...to clarify..... .the GTX3576 is reported to match the GTX3076 for boost response and make more power.

Anyone considered the new GTX3576 for an RB ? http://www.atpturbo.com/mm5/merchant.mvc?Screen=PROD&Store_Code=TP&Product_Code=GRT-TBO-185&Category_Code= Reported to have same boost response of a 3076 with more power of a 3076 as per post 33 of this thread link who is a Garrett employee. http://www.nissanroadracing.com/showthread.php?t=3241&page=4

As is typical with twin scroll - power curve looks reasonably progressive.

He's the "Horse (power) Whisperer".

I'm pretty sure Garrett is still smiling too

Solid line looks like torque....dotted line is power....albeit in PS so would read lower in KW's.

Yes it always looked a bit of a handfull coming out of corners - traction always seemed an issue. Typically twin scroll setups provide a a more progressive and predictable power curve, even if not outright power. So sounds like a step in the right direction.

Lets move on and keep the thread on topic

At the outset I've owned both brands of manifolds and are both arguably the best on the market. The 6Boost is the better finished manifold IMO. I tidied up the twin scroll Full-Race mani with a die grinder before fitting it to my S15 - not required with the 6 Boost. Whether the differences in finish between the two results in a shred of performance difference remains to be seen though. I still have the twin scroll twin gate Full-Race mani on my S15 and couldn't be happier with the way it spools a 3076 on an SR.

Why did they ditch the twins?

My comments were tongue in cheek.....,,,running 40psi and 98 in a street car is absurd as was my comparison with a top fueller.

Yes the comparison is absurd....around 400psi fuel pressure and around 4 litres of fuel a second consumption.

You'd think so.......considering a top fueller runs around 50 psi....different animal altogether tho'

Buy a Borg Warner twin scroll turbo.

Pretty much what others have found with that housing some years ago. http://www.freshalloy.com/forums/showthread.php?t=186058&page=4&highlight=twin+scroll Can probably grind reliefs in the housing if there is sufficient meat.....email Geoff Raicer as he has fitted at least one of these to a Subaru that I am aware of.