my car is being modded at present all the usual stuff and i have to make a choice on turbo tomorrow or weds at latest...ive narrowed it down to a couple. the car will be used as a road car no track days just a fun weekend car..i have standard internals so i was going with the gt28 rsr for a drivable quick spooling not much lag car.. but.. i only want to do this once and i suspect the rsr wont have the big back in the seat kick in the pants i want....which leads me to my other choice gt28rs with .86 housing the .64 would be a bit pointless as the rsr is close enough to make little difference.. i know the .86 gives a good kick but late spool and lag .. with me not red lining the car much it seems to be a bit of a waste and will make it harder to drive a bit more all or nothing..anyone think of anything that will help or can anyone with either turbo tell me how its running etc any info gratefully recieved

I'd definitely get the RSR, if it's anything like the R then it's not so much about an instant kick, but the way it just keeps getting better through 4500-6000, takes your breath away. You'll probably grow to like it more than if it just gave a massive kick and that was the best bit over in an instant. Was like that for me switching from the GTiR hybrid to a GT28R, I was sceptical at first but quickly grew to like it more.

When i brought my rsr i was told they are very smooth. Well when fitted and now mapped i can tell you its not smooth. You get a big wallop in the back at 3k rpm then it just keeps pulling to the redline. They are very close power to the rs but spool better.
It hasn't got the top rev (6k+) of the bigger turbos like gt28rs71r but it would keep one very very honest and pull stronger at 3-5k.
It was the best turbo i brought (had stock and a gtir hybrid)

You won't be disappointed with it when you get it mapped aswell.

Ash

thanks gents.. what down pipe are you using and where are you feeling positive boost ..are you using a ebc? do you have noticeable lag and when driving normally in town do you have to change down to avoid big lag when you want to go a bit or will it drive ok asuming your not too low in the revs of course..i think i want my cake and eat it i suppose there has to be a trade off....i want the big grin slightly scared feeling you get with bigger turbos though the standards stop me!.. i will build a motor eventually from scratch with forged and do it right but in the mean time i want a fun car im worried if i go with the rsr ill be tired of it after a few months and need more

That's the problem with modding, you could knock 400bhp now and want more in 6 months once you're used to it

I don't think you will find an RSR laggy especially after it was mapped etc.

Is the car completely standard at the moment? If so then regardless of the turbo you choose all the roller bearing ones will seem laggy around town, and below 3,000 rpm - you just have to get used to it.

Will you be using a full exhaust - if so then what diameter? It makes a big difference on the roller bearing cars, especially the downpipe. If you are using a standard downpipe then I would look at a hybrid rather than a roller turbo. PowerItalia do a range of hybrids that will see you close to, and in some cases over 300bhp.

You can exceed the 'safe' limit of the standard internals with the RSR, and the RS with either housing.

With the bigger housing you will gain more at the top end - but the standard internals are going to limit the boost you can safely run at the redline anyway to 1.1 - 1.2 bar. If you dont go there that often then you could argue it's pointless going for one.....HOWEVER with any of the turbos that you are looking at changing up at 6,000 rpm will not happen as you wont feel any drop off in power - expect peak torque to be at about 5,500 rpm. You will be holding the gears more as that's where the fun is...

If it was me I would go for the RSR - run 1.3 bar of boost, with 1.15 bar at the redline. You'll be responsive, and also safely within the limits of the standard internals.

i have full blue flame with 2.75downpipe which i was going to weld the 5 bolt flange to in order to get rid of the vband, fmic, sip ,boost controller etc, anyone recomend a good one i was going to use apexi avcr or if i dont need to spend so much a profec b...i want more than anything a good back in the seat shove if i went with a stage 3 hybrid does anyone know what they are like for lag and do you get the big shove or am i going to have to go rs .86 and put up with lag and late spool

as suba says there doesn't seem much point in going for a 0.86a/r rs as with standard internals if you use it to its full potential you are risking the engine, all you will end up with is more lag, why not go for something you can use to its full potential that will run safely with standard internals, as for boost controllers can recommend a gizmo msibc really easy to set up, even i managed it lol, and holds boost really well, no spikes, great bit of kit

Apexi AVCR is not really needed for a car of that spec - you will only be using half the features. Profec B spec 2 does well enough. With an EBC you will also be able to tweak the gain to get a 'thump' 'of boost - the Greddy also allows you to set the wastegate point, which can help with this.

The hybrids do give you a good thump - more so than a GT28R as they come in fast and hard lower down the rev range. A GT28R builds at 3K - and builds more at 5K, but does not thump, which is why you can get away with using a standard clutch.

The roller turbos will be fine with the 2.75 inch downpipe.

descision made rsr it is can some one post the full spec for me so we can see if theres anything else can be done whilst its being rebuilt

Do you mean whilst the turbo is being re-built or the engine?

turbo .. i think its just the rs (comp) wheel and inducer fitted to the r (2560)? correct me if im wrong

What is the old turbo that is being re-built?

Yeah, you wont get bored of an RSR, its a good all rounder, plus you say one day you might go forged, well im forged with an RSR and run 381bhp proven, with liitle lag and a big thump in the back at 3,000revs and an even bigger angry thump in the back at 5,000revs, its insane and I love it!

Some people say, that through the twisties it would keep up with cars well over the 400bhp mark due to the lag being less with the RSR, compared to other bigger turbos.
Anyway, thst what an RSR is capable of.

When I made the upgrade Roger told me that RSR units were based on re-built / re-con turbos. Irrational I know, but I preferred to spend my cash in a fresh out of the box RS from USA.

Re-con no, rebuilt yes, because its a muddle of 2 turbos, but still new.
Turbodynamics are one of, if not thee, main supllier of an RSR, they charge 995 + VAT, dont tell me thats not fresh out of the box for that money.......

I thought they just took a brand new R out of the box and put a brand new RS compressor wheel on it.

it seems theres a little reluctance to divulge the full spec to any tom dick or rob in this case..but from what i can gather its the 2560 with 2860 comp wheel and inducer and a little machining to get the 2 to match... they can build a new one which with vat £1100+ but if you send in a 2560 they refurb and respec it to rsr for £495 + vat but the story doesn't end there... i had been ringing other turbo suppliers that do hybrids, most hadnt heard of it but one had i was discussing with this guy whether a stage 2 62 wheel hybrid would be any better for what i wanted ..i explained i wanted a good shove in the seat and had contemplated the rs.86 ...he said he'd have a word with his engineer who has done a lot with hybrids and motorsport and he'd explain what i wanted ..1 hour later i get a call and he says he'd discussed it and he could give me a turbo that would give me the big shove i wanted would do the bhp i was after and early spool:)(id mentioned 220/240) send me your 2560! but the best bit was when he said ... it'll cost to have the spec i wanted... expecting the worst, imagine the smile when he said £325!with warentee! needless to say the turbo is now on the way..i'm not sure exactly what they will do but if they give me what they say i expect they will see a few more 2560s and its a cost effective way to do it with the same warentee you get with a new unit!

Well you need to organise a group buy with this chap then! Good work

CR turbos are the best and most helpful company i have ever dealt with.
So far i have purchased prob 20 turbos from them.

They will talk for hours about specs.They have a real passion for what they do.
Ontop of that not so long ago i fitted a blower to a car and it went bang 2 weeks later which they replaced foc no questions asked.
(and its a good job they didnt ask )

And for the price you cant go wrong.


Nice to see you have finally made your mind up Rob ..And i thought my Ex Mrs was bad

So, are you ending up with an RSR, or something else along those lines?
Sounds good.

I had a chat with CR Turbos and they had time for me for a chat, unlike a couple of other companies I spoke to.

John get that turbo off quick as i am worse than your ex misses i wont stop what if ing untill they have started on it! heres a thought ..if matt sells me his .86 ill send that to cr as well then ive got the best of both worlds i could bolt it on for track days or the odd 1/4 mile is it poss to do that if im mapped for the rsr ? what if i took it with me when i went to get mapped and swapped it to do one channel on the ebc is it even possible? see im off again! ..im considering a h+s as they will make a 5 bolt 3" for me that tapers to 2.75 to fit the bluflame for £250 or £270 + vat i cant remember which but i can get £150 for my down pipe and £50 for the v band and clamp so it looks like i might as well..back to the turbo im intrigued as to what they will do with it and i cant wait to try it..but you do know ill have been round the block twice with what other mods are going on then end up doing what we were going to do in the first place:0
about cr... they were patient and had time to listen to my ramblings which is nice i know what you mean about places having no time ..ive spoken to a few that make you feel like your a nuisance although that happens to me daily my technical know how impressed him ..i want a big kick in the pants ..he must have wished he was stood behind me! ..i am impressed with the service and price if the turbo is as good ill be going no where else in future

If you are sending off a 2560 for a new compressor wheel unless it's shagged then I would have sold that unit and got a new one - would work out the same money....anyway:

Do NOT change to a different turbo unless you have the car mapped and setup for it - this means not only the boost controller, but the fueling and ignition maps as well.

If you get the car live mapped by Flea I guess he could do you two different chips for each turbo that you could also change as well as a different profile on the boost controller, but it would be more money, and a lot of hasstle for not a lot of gain IMO.

true it is probably too much hassle to do the 2 turbo thing, the 2560 i had for sale at 450 with vband and only got one person in weeks i paid 450 for it so with the 325 it will owe me 775 the rsr worked out at 1100+ new, i could have got a rs for about 900 but with standard internals i thought it probably better to stay with the rsr and the quick spool up and better overall drivability plus the £125 difference clinched it. It does seem a shame to send a good turbo off but i couldn't find a knacker, even on ebay or i'd of bought that and sent it, plus i can sell the v band off mine as i'm going with a h and s 5 stud downpipe. My intention has always been for the car to go straight to flea with him doing such a good job it makes it easy to bolt all these mods on, i don't know whether i would've wanted to spend this much money and trust a generic chip with the fuelling of a 300+ car.

fair enough.

Going over 300bhp without mapping is a time bomb.

Rob,decision made,.End of.Once the turbo is collected thats what your getting weather you like it or not.


But to be honest with the setup that i will fit im hoping it will give some 350bhp ish motors a run for there money as using a hybrid.
Interested to see what it does with Leightons map.

it wont give them a run for thier money itll take thier money off them ! i think we might be surprised and be not too far behind the 350 in hp and with quicker spool than the bigger turbos as long as we are not on a motorway we could well be in front ...i'll go with everything you think best john ,its been what i want up to now and i know youll put together the type of car im after...after speaking about yours and the ones you've built for other people i know we sing from the same sheet ..im sorry i bottled it with the .86 though...if you will you can put together the forged when it happens then you can just run with the ball!

If its as good as i think it will be them i might just have to keep it for myself

i might swap for that fine looking black le