blade7

After searching I'm asking here, on a 2.5 with just chips and a decat will a LR 61 be a significant improvement over a standard 250 turbo or will it trade low down response for top end pull ?.

Paulyy

you'll notice some lag, possibly 1bar at ~3500rpm (correct me if im wrong) but you will notice a lot more top end then the standard turbo.

blade7

Thanks paulyy, I've been offered a LR61 but it isn't a BB.

Paulyy

i just did a quick search, for a standard thrust bearing (not DBB/BB) 16psi is a 3500 rpm. which isn't to bad IMO. with Rogue tuning M-Tune the bottom end response picks up better so you can't feel the lag as much.
but if you don't mind getting full boost by 3500 rpm i say go for it.

blade7

What options are there for uprating the standard turbo ?, may be more cost effective and have the benefit of being rebuilt.

Black51

Dnovak has an interesting thread going, but hasn't been updated very recently. You may consider going in the direction he is venturing in. I myself am interested to hear more about his setup. I'll try to find it and put the link up here. Standby...

Black51

https://rennlist.com/forums/944-turb...er-thread.html

onspeed

I think a K27/6 or K27/8 is probably the cheapest way to go.

I had a DBB .50 Trim T04E w/#8 hotside and I was seeing 19 PSI at 2,800RPM, just a tick slower than the K26/6 - maybe 200 RPMs. And it held 19PSI all the way to redline. It was a little pricier than the K27 hybrids, but worth it IMO.

dillon410021

here is my new turbo.
its a SFR stage 1 turbo. trim is 49mm but they call it a 50 trim. It is sitting next to a stock k26-6

Techno Duck

If i remember right the Super61 is similar to a 60-1 HiFi. I ran the later and with leaking header flanges i was getting 1-bar at 3700-3800rpm. A few others have reported 1-bar around 3400-3500rpm. A buddy of mine has it in ball bearing and i have driven the car a little, but did not get on it hard. Based on my experience i think it could easily do 1-bar by 3200rpm.

Its a good turbo and should easily get you about 300whp @ 15-psi with the usual supporting mods. I would have loved to of had the ball bearing version on my car. The turbo really shines when you start pumping up the boost. I did one 17-18psi pull on an empty road..2nd through 4th and i was basically pinned to the seat!

TurboTommy

The LR61 refers to the compressor and is too big for a 2.5 unless you're going really high boost; which then needs the proper sized hotside.
Which hotside gets used with this LR61 is not mentioned and is just as important (if not more so), to determine the power characteristics of this turbo.

blade7

Dillon what are you expecting from that turbo ?. TT and TD thanks for the advice . What boost will a K26/8 run to before it becomes inefficient, I'm thinking up to 18 psi for short periods on a cool day ?.

Paulyy

i wouldn't even bother with that turbo IMO
it's like a 10-20 hp upgrade overall.

lart951

I believe I have a dyno with a SFR stage I turbo and also the LR super 61, the super 61 blow the crap out the sfr stage I, did it 6 or 7 years ago it's here and it's documented with dyno sheets

blade7

Hey lart, turbo's have moved on in the last few years ?, I was offered a LR 61 by a tuner, it's only done extensive dyno time, not sure if that's good or bad ?, TBH I'm more interested in response than a few more bhp at the top end.