500hp turbos- part 2

[Rocco]

On the wheels......

Then perfect

Must be impressive

[chris.lilstar]

Audi RS2 : Garrett GT3076 AR82, 4" antisurge

Wagner RS2 EVO KK flange,

8,5CR

750cc EV14/Bosch 044 pump

3" Miltek exhaust without cat

mildly ported head with original cams

Original IC and Airfilterbox

Autronic SM4 PnP

stock motor?


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[Audiboys4]

stock motor?


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JE pistons (81,5) + H beam rods and ported head. 2.2

Otherwise stock looking engine room.

[chris.lilstar]

JE pistons (81,5) + H beam rods and ported head. 2.2



Otherwise stock looking engine room.

so definitely not stock haha




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[Quattronaut]

Pretty cool numbers, should be fun to drive :-)
What is torque & hp loss at the RS2? Around 80hp?
Do you have boost numbers for us?

[Audiboys4]

It was a bit laggy for me. Might need to look into a new turbo and cams

[Thuppu]

Trying to decide for a turbo in 500hp range for my 80q. One alternative would be Holset HX35 Super, but I have been offered a Garrett 52/62mm, .63 A/R. Any thoughts?

[quattro-nick]

i had a gt3076r 0.82 A/R in the past and i was very satisfied with the numbers,520hp and 635nm torque,full boost(2.0bar) on 3800 rpm

[Thuppu]

I'm not sure what the base is on this turbo, but it's a custom build with both compressor- and turbine housings machined. According to the seller, it can make 600hp on a sr20det engine with great responce and spool, but I'll guess it would be with e85.

[quattro-nick]

i seems that the inlet house is from a gt35....

[Thuppu]

Got better specs and pics of the turbo. Some info was wrong. It has 54/76mm compressor and 74/62mm turbine with .48 a/r housing. Could be quite early spooling..? New modified turbo with watercooling.

[sandman1111]

Got better specs and pics of the turbo. Some info was wrong. It has 54/76mm compressor and 74/62mm turbine with .48 a/r housing. Could be quite early spooling..? New modified turbo with watercooling.

Do you think .48 housing can make that much power? It has quite big turbine, so it might be ok. I think the back pressure goes true the roof. Sure it will spool fast, but making big power, I´m not so sure.
If you guys want big power and fast spool, try Borg Warner SXE turbos. Maybe can find a open t3 housing for them. If there is something that will fit. I would never consider any Garrett or Holset, IF buying new, and going for 400+.

[Thuppu]

Do you think .48 housing can make that much power? It has quite big turbine, so it might be ok. I think the back pressure goes true the roof. Sure it will spool fast, but making big power, I´m not so sure.
If you guys want big power and fast spool, try Borg Warner SXE turbos. Maybe can find a open t3 housing for them. If there is something that will fit. I would never consider any Garrett or Holset, IF buying new, and going for 400+.

I have no idea, but I suspect it will not do 600 on a I5, 500 would be great though. You are propably right about the backpressure. This is custom made by a finnish motorsport team, so it may have some potentional..? This is a never used geniune Garrett for only 450e so I will try it out.

[sandman1111]

450 EUR is a good price. You can always sell it for the same money. I would try 500 crank with E85.

But in my opinion going with a very small AR housing is always quite a big trade off. Backpressure is quite nasty. You get lots higher EGT, lots more chance for detonation, if you got cams with big overlap, there is just too much burnt gasses in cylinder, less oxygen makes less power. Dosen´t sound right. If I would go small housing and big hp. Only way I would do it is with E85, and adjustable cams, cause overlap with high back pressure is bad. Anyways those are my thoughts and I´m no expert. For 500-600 hp cheap, I would go with Holset HE341. Hard to find but they can be found for not much money. If anyone has one for sale, I´m interested.

[Thuppu]

I'm going to use 7A cams in stock timing marks so not much overlap. Other wise I would use stock AAN cams but I don't have any. This is a budget build anyways, trying to make it fun to drive on street and winter time, easier to drive if it spools early and have good responce. The transmission is a 01A so it wouldn't handle too much power >500hp.

My other UrS project is then a totally different, trying to make it without much limitations...