gorganl2000 Posted February 5, 2016 Share Posted February 5, 2016 (edited) been having a discussion with some friends on this topic yet again...somehow it always seems to pop up assuming a stock 5efte/5efhte engine (cams, pistons/rings, head, headgasket, 50mm TB, rev limit 7200rpm, etc) with stock compression 9.0-9.6 range....looking to run 14 - 18 psi daily on pump gas (95 - 98 ron) and the odd 20 - 25psi on race gas given all the massive moves in technology over the years, which of these turbos would be ideal for making about 300whp, along with the very best daily drivability, earliest spool, best spool on gear changes, etc subaru td05, subaru td05 billet wheel 16g/18g, ihi vf34, ihi vf35, vf35 billet wheel, ihi vf28, gt2860rs, gtx2863r, gtx2867r how does the gt2860rs compare to the newer gtx2863r and gtx2867r in terms of spool and response?? anyone running these turbos with personal experience? PS---assuming money to purchase any of these turbos was not an issue Edited February 5, 2016 by gorganl2000 Quote Link to post Share on other sites
5e colin Posted February 5, 2016 Share Posted February 5, 2016 you wont be able to run20 to 25 psi you need to go forged pistons fail at 1.2bar ( 17or 18 psi ) +- Quote Link to post Share on other sites
gorganl2000 Posted February 5, 2016 Author Share Posted February 5, 2016 (edited) you wont be able to run20 to 25 psi you need to go forged pistons fail at 1.2bar ( 17or 18 psi ) +- hey colin, thanks for the reply i can assure you that the above boost pressures can be safely ran and have been safely ran for a while now on a few cars here... maybe i should have added that tuning will be done to accommodate these turbos....though i kind of figured it was a given at the boost pressures mentioned....however, we should never make such bold assumption lol so to add to my earlier post...the cars/engines will be tuned accordingly ...fuel and ignition bigger injectors, piggyback/standalone, fuel pump upgrade, oem/aftermarket fpr also, for the sake of discussion, let's upgrade those pistons and rods to forged ...with the same 9.0 compression as above Edited February 5, 2016 by gorganl2000 Quote Link to post Share on other sites
AdamB Posted February 6, 2016 Share Posted February 6, 2016 Can only really comment for Garrett turbo's. There's no difference in spool between GT series and GTX series turbo's. Quote Link to post Share on other sites
gorganl2000 Posted February 6, 2016 Author Share Posted February 6, 2016 thanks adamb...so is the much talked about 10-15% extra flow between the gt vs gtx true/false? i checked the ukstarlet leader board and realised socks, ryan-11 and rob ebbs did quite well with gtx2863r and gt2860rs models, even better than some gtx/gt30., ...i'd like to compare the graphs, but all different dynos and possibly different set ups and boost.....so the end result would not be as realistic as i'd like what's the difference between super unleaded and pump unleaded over there? Quote Link to post Share on other sites
gorganl2000 Posted February 6, 2016 Author Share Posted February 6, 2016 is there a noticeable improvement in boost response on gear changes between the Ball Bearing gt/gtx series over the Journal Bearing td05/vf35/greddy turbos? Quote Link to post Share on other sites
AdamB Posted February 7, 2016 Share Posted February 7, 2016 (edited) thanks adamb...so is the much talked about 10-15% extra flow between the gt vs gtx true/false? i checked the ukstarlet leader board and realised socks, ryan-11 and rob ebbs did quite well with gtx2863r and gt2860rs models, even better than some gtx/gt30., ...i'd like to compare the graphs, but all different dynos and possibly different set ups and boost.....so the end result would not be as realistic as i'd like what's the difference between super unleaded and pump unleaded over there? The flow has nothing to do with the spool time. Yes they do generally make on average 10% extra flow, but the spool is the same as the GT series turbo. Using a dyno graph to look at where engines make power, and compare setups is ok, although the numbers they make I wouldn't believe, too many variables especially across different dyno's, air temps, tyre pressures etc etc. There's a much noticeable improvement in boost and throttle response with a Garrett compared with a TD series turbo. You may not see it so much on a dyno plot, but in real world conditions on the road there is a vast improvement. Super unleaded here is 99 RON, normal unleaded is 95 RON. Although if you shop at Tesco and use their Momentum fuel it has higher Ethanol content than that of Shell V-Power Good if you want an extra couple of BHP down the pub, not so good for fuel economy. Edited February 7, 2016 by AdamB Quote Link to post Share on other sites
gorganl2000 Posted February 7, 2016 Author Share Posted February 7, 2016 good to hear there is noted improvement on the road, as that is where it really matters. i simply see dynos as a tuning/learning tool and can be very useful, but as we said in other posts, sometimes persons get lost in aiming for peak numbers instead of the overall power band you guys get some decent pump gas compared to here...quite a few guys runs meth kits to improve the quality to your RON levels Quote Link to post Share on other sites
AdamB Posted February 7, 2016 Share Posted February 7, 2016 This might help you outhttp://blog.perrinperformance.com/garrett-gtx-turbo-comparo/http://blog.perrinperformance.com/garrett-gtx-turbo-comparo-part-2/ Yeah we do get some good pump fuel, although it's never good enough. Funny thing is, although we get good octane ratings, other people who don't have that luxury are still making better power... Says something about the way things are done on this Island. Quote Link to post Share on other sites
gorganl2000 Posted February 8, 2016 Author Share Posted February 8, 2016 (edited) from what i've heard around, our base fuel seem to be like 90 ron... that's why the meth kits seem to be somewhat popular over here yeah i saw those links in my searches...very informative now in terms of turbine housings...i see a number of a/r options 0.57, 0.64, 0.72, 0.84 which seem equivalent to approximately 8, 9 10, 11 cm2 respectively....apart from the 0.57, aren't the others on the biggish side of things for our 4e/5e engine? i see Mamba offers a 0.49 (7 cm2) turbine housing for Subaru fitment (gtx2863r, gtx2867r, etc), which a lot of guys here run this exhaust manifold/downpipe combination...but maybe this size a/r is decent for a smaller displacement engine??...same specs as the garrett gtx28 series, but would have to do a search of the internet for reviews on this brand Edited February 8, 2016 by gorganl2000 Quote Link to post Share on other sites
AdamB Posted February 8, 2016 Share Posted February 8, 2016 Meth kits are becoming more and more popular over here as well, like I said, no matter how good a fuel you have people always looking for more. I'm not too informed regarding turbine sizes in cm2 if I'm honest.Garrett do offer a .48 housing, off the top of my head though not sure if these are offered for **28 series turbo's.If you have a search over on TGTT, look at some of Spuddy's posts or in his build thread if it's still there, I'm sure he mentioned that he stayed at the .48 housing till something like 440bhp (fly) until it started choking flow, that was with aftermarket cams though I believe. Quote Link to post Share on other sites
gorganl2000 Posted February 8, 2016 Author Share Posted February 8, 2016 will try...but last i know ttgt search button was down for a while now Quote Link to post Share on other sites
RobSR Posted February 11, 2016 Share Posted February 11, 2016 Meth kits are becoming more and more popular over here as well, like I said, no matter how good a fuel you have people always looking for more. I'm not too informed regarding turbine sizes in cm2 if I'm honest. Garrett do offer a .48 housing, off the top of my head though not sure if these are offered for **28 series turbo's. If you have a search over on TGTT, look at some of Spuddy's posts or in his build thread if it's still there, I'm sure he mentioned that he stayed at the .48 housing till something like 440bhp (fly) until it started choking flow, that was with aftermarket cams though I believe. Do you have a link to Garretts .48 housing ?? Quote Link to post Share on other sites
gorganl2000 Posted February 12, 2016 Author Share Posted February 12, 2016 somehow i recall some 0.48 housing being associated with some kind of nissan pulsar/240???maybe something in T25 or T3 design....not sure if they would fit it was a long time ago, so the memory may wrong lol Quote Link to post Share on other sites
RobSR Posted February 12, 2016 Share Posted February 12, 2016 If its T3 thats perfect for me! Quote Link to post Share on other sites
AdamB Posted February 12, 2016 Share Posted February 12, 2016 Do you have a link to Garretts .48 housing ?? Which turbo pal? Quote Link to post Share on other sites
RobSR Posted February 13, 2016 Share Posted February 13, 2016 To go on the back of a 2860 Quote Link to post Share on other sites
AdamB Posted February 13, 2016 Share Posted February 13, 2016 (edited) I can only find the T3 5 bolt discharge housing to purchase seperately. Found the .48 T3 4 bolt discharge but only as part of turbo's. I assume its the 4 bolt you want?So must be able to get the housings on their own. I'm sure the company in America I use had them listed before, but can't find them now. Probably worth getting on to Owens to see if they got any knocking about. Edited February 13, 2016 by AdamB Quote Link to post Share on other sites
RobSR Posted February 14, 2016 Share Posted February 14, 2016 I can only find the T3 5 bolt discharge housing to purchase seperately. Found the .48 T3 4 bolt discharge but only as part of turbo's. I assume its the 4 bolt you want? So must be able to get the housings on their own. I'm sure the company in America I use had them listed before, but can't find them now. Probably worth getting on to Owens to see if they got any knocking about. Spoke to lee and he said they never offered a .48 4-bolt which is why i was so interested! Quote Link to post Share on other sites
AdamB Posted February 14, 2016 Share Posted February 14, 2016 Hmm that's strange. Maybe I'm misreading something... Quote Link to post Share on other sites
RobSR Posted February 14, 2016 Share Posted February 14, 2016 ^ Maybe they make there own? Lee suggest as they're starting to produce own brand turbos they could make a .48 a/r 4 - bolt. Was that off ATP's website? Quote Link to post Share on other sites
Phil Posted February 14, 2016 Share Posted February 14, 2016 Not sure it helps but I recall ATP selling a gt28 kit that was actually a gt2560 turbo ages agoPhil Quote Link to post Share on other sites
AdamB Posted February 14, 2016 Share Posted February 14, 2016 (edited) ^ Maybe they make there own? Lee suggest as they're starting to produce own brand turbos they could make a .48 a/r 4 - bolt. Was that off ATP's website?Yeah ATP mate.Well I've seen the .48 ages and ages ago, so can't be something new? They are a Garrett dealer as well, I've had turbo's from them in the past with no issues, so not a company I wouldn't trust.Might be worth dropping them an email and finding out? Find out if you can purchase the housing seperately? Not sure it helps but I recall ATP selling a gt28 kit that was actually a gt2560 turbo ages agoPhil The GT2560 is a GT28, IIRC its the same turbo that comes on the SR20 motors. Edited February 14, 2016 by AdamB Quote Link to post Share on other sites
gorganl2000 Posted February 15, 2016 Author Share Posted February 15, 2016 Yeah ATP mate. Well I've seen the .48 ages and ages ago, so can't be something new? They are a Garrett dealer as well, I've had turbo's from them in the past with no issues, so not a company I wouldn't trust. Might be worth dropping them an email and finding out? Find out if you can purchase the housing seperately? The GT2560 is a GT28, IIRC its the same turbo that comes on the SR20 motors. that's what comes to my mind too as i said earlier, its something to do with nissan...just seems so long ago Quote Link to post Share on other sites
gibby1980 Posted June 11, 2016 Share Posted June 11, 2016 Garrett does not sell the .48 anymore. Quote Link to post Share on other sites
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