turbochargers for 500hp

[nicksonmsport]

Looks like full torque by 3500rpm. Is that on twin scroll manifold?

As mentioned spec of engine etc with that turbo setup.

Thanks

[Error404]

Because know-how, engineering and good materials cost money.
That is fact.

Possibly the only fact so far in this thread

[nicksonmsport]

Also well worth stating to try narrow down best turbo choice. This car will see the race track only. So good response is needed but maybe im worrying to much about lag as the car will always be in the higher rev range. I dont want to go mad spec with the engine so revs limites to 7500. If turbo is on max boost by 4krpm it just means I have 3500rpm power band. Obviously if I built engine for 8500rpm etc then turbo size wouldnt matter so much.

But I do want a turbo that will pull hard to the red line without dropping off. Would the holset hx35 super drop off slightly due to smaller 8cm housing.

Would an hx35 with 12cm maybe hold boost better at top of rev range?

[Bowie69]

Fit a V8 and forget the turbo if you want a torque monster.

[Error404]

Well my K24'd coupe has way more torque than the Mrs V8 S4 so thats a non starter

[nicksonmsport]

Was going to say these 5cyl engines are torque monsters!

Seen a few with 6-700nm

And they sound better!

[Biturbo]

Then again vs HX35S 340hp @4000rpm. The old antique h1e cant be compared to a "modern" GT30xx.

H1E you can get for 300 pounds,and gt30xx you pay 3 time more and still do 500hp .It is very very old turbo.Dna wite rs2 run holset hx35 billet wheel turbo with 10cm hot side and make 524hp.Now not remember when was full boost.In that car just need both 7a cams and would make even more.

[Billman]

Where is the link with the HY35?
Found it. It is almost an HX35.

[Thuppu]

Looks like full torque by 3500rpm. Is that on twin scroll manifold?

As mentioned spec of engine etc with that turbo setup.

Thanks

I don't know all engine specs. 98 pump gas, water/meth inj., ported head, Shrick cams, etc. If I remember right the turbo was with #8 single entry hot side. And a big 60mm WG.

Just wanted to share this dyno plot, because I havn't seen a better one in the 500+hp range. Many people here is afraid of Holset turbos, don't know why... propably because of this. They are made to last long in extreme solutions and high boost applications, they have great spool compared to the size of them, they are cheap compared to high tech bb turbos. Only thing that may be little worse than a Garrett BB is the inertia and the response. In all other things they are better.

Of course there are full race custom hybrids out there that are better in any way, but also the price is totally different then.

[Bowie69]

Well my K24'd coupe has way more torque than the Mrs V8 S4 so thats a non starter

Seems torque is wanted straight off the bat, and not waiting for the hairdryer to wind up at all, hence the tongue in cheek suggestion

You could supercharge it and have no lag.

[nicksonmsport]

or twin charge it lol!!

just realise you cant really do a twin scroll manifold for twin scroll holset as its 5cyl which can be split equally!

are there single scroll holsets?

[Thuppu]

Just read my posts, then you know the answer.

And there is no problems using a twin scroll hot side with a normal exhaust. Just smoothen out the notches...

[snp10]

Regard Garrett, what is your recomandation for Inlet, Outlet and AR . For Gtx3076 model.

[Albert]

Inlet 4 inch, outlet 0.82 AR, T3

[snp10]

And maybe full boost at 4500 rpm