K24-7400 boost profile on stock I5

[andy10v]

What's Marc username on here ?

Cheers

a4kquattro

[etsola]

What's Marc username on here ?

Cheers

[Ruffiano]

It would be good also to have possibility to buy chips for AANs for this turbo.

those are available, both Marc @efiexpress and PRJ make chips.

[_ShurikeN]

It would be good also to have possibility to buy chips for AANs for this turbo.

[etsola]

Since this post is alive again, any chips for 3B's for that turbo yet ?

Also, what are your thoughts on billet compressor wheels ? I can have oversized with 11 fins or 7+7 or stock size with 6+6 etc...

Any real difference ?

I want good spool time and power band, not looking for a peak HP beast.

Cheers

[sandman1111]

How big is the turbine housing? A/R, cm?

[macspring]

Full boost is at 2600-2700 rpm. Basically it spools better than stock.
The boost profile is:
1.7 bar from 2500 to 5500 rpm, after which it tapers off to 1.3 bar at redline.
The turbo can not do more than 1.7 bar at 5500 rpm and then 1.3 bar at 7000 rpm (98% N75 duty cycle with 1.9 bar spring) and IAT's start to go up.

So it is not as strong as a RS2 turbo - that can do 1.45-1.5 bar at 7000 rpm, but it also has no lag at all. Instant 1.7 bar all the time with a 3000 rpm power band.
It makes about 540nm and 350 bhp.

Question posted just in case Prj sees this post.

If the above post covers the Volvo 24-7400 and the standard RS2 turbo, where would / does an IROZ Motorsport RS2 hybrid turbo stand in terms of figures on a standard AAN car with a 044 pump and green giant injectors (440cc) I think ?

Thanks.

[Ruffiano]

That sounds about right yes. I guess you're Italian

dyno was done in the USA...

[porkkis]

That sounds about right yes. I guess you're Italian

[Ruffiano]

Also US wheel horses seem to follow European crank horses so there's something strange going on too

does my 292 awhp number with that volvo k24-7400 sound un realistic?

[porkkis]

I really like the k24-7400 as an allrounder. I've mapped two cars running it and I do share the experiences about quick spool. I'd say it can provide some 40-50hp more that stock k24 and around 30hp less than RS2 turbo.
It's pretty much perfect for winter fun in conditions where laggier big turbos are far from perfect.

Just remember when you talk about hp figures: Every rolling road gives different results. They can not be compared. Period. RR is a brilliant tool for tuning a car and seeing the affect of mapping changes but not for REAL hp numbers.

My RS2 mappings on a local RR has typically shown 350-360hp depending on cams (RS2 or AAN/ABY/3B) and 380hp (and 600Nm) in a RS2 running E85 fuel. The same cars give different numbers on a different RR. They certainly will. So the numbers can't be compared to other ones mentioned here.

Also US wheel horses seem to follow European crank horses so there's something strange going on too

[Zoig]

Full boost is at 2600-2700 rpm. Basically it spools better than stock.
The boost profile is:
1.7 bar from 2500 to 5500 rpm, after which it tapers off to 1.3 bar at redline.

That's my car

Gotta love how the turbo suits the engine and moves this big old barge, probably most optimal for daily winter car. I'll do my best to get few drag sessions and 1 mile challenge done this summer.

Cheers Dmitri, see you again in a month or so

[andy10v]

I understand. I have the turbo, car and injectors all the in the garage, just need software. (and to put the car back on the road) Hopefully the car will be on the road at some point when you are in the UK.

[prj]

No chance of a 3B k24 7400 440cc generic chip just now then?

If you just have a K24-7000, I can take the Stage 1 I have for this, and just adjust injector size and latency.
It won't make any extra power over a standard Stage 1 car, but it won't run pig rich either.

EDIT:
Misread it. For K24-7400, no definitely no generic chip on a 3B.
Need to live tune it for it to be any good. But if you already have the turbo and the car, I'm coming to the UK anyway, and I don't mind mapping it up.

[andy10v]

No chance of a 3B k24 7400 440cc generic chip just now then?