700HP-GTR33 Posted October 2, 2008 Share Posted October 2, 2008 OK...let me explain it again. There were 4 different Turbo combinations that Garrett made. The -7(N1),-9(SS) were close as far as Performance.these were the N1 and SS equivalents. Both these Turbo's have a very similar housing size as Stock and are rated to be able to support 300 and 320hp respectively. The factory stock turbo's I recall were rated either to 260 or 280 each.But don't quote me on this. Now the -5(GT2530) and -10(GT-RS) have bigger housing and are able to support 350 and 400hp respectively each. In no way unless you want giant lag should you use -10.(GT-RS).......unless you have a built motor with high lift cams dialed in buy a good tuner. Even then you will see power higher in to the rev range that makes driving around town stupid. These are only good for drag and whiplash when they start to spool at 5000RPM. Now most people here swear by the SS or N1...both of which are great for low power delivery and great therefore for street. Responsive and a good package.......no mods needed slap them in and presto..... OK......If you want some serious usable power mid to high range the -5's are good. But I only suggest -5's if you continplate upgrading Computer,Cams,Dumps,Injectors at a latter stage or if you are thinking it will be a work in progress. The other option is to go 1 Single and be done with it...although this can be a lot more costly. Link to comment https://www.sau.com.au/forums/topic/137067-gt2860r-7-or-5-response/page/2/#findComment-4172173 Share on other sites More sharing options...
R33GTRKid Posted October 3, 2008 Share Posted October 3, 2008 thats interesting, I was under the impression SS's were rated to 280ps and 2530's 320ps Link to comment https://www.sau.com.au/forums/topic/137067-gt2860r-7-or-5-response/page/2/#findComment-4173127 Share on other sites More sharing options...
some_cs_student Posted October 3, 2008 Share Posted October 3, 2008 Thanks for the explanation TK, makes more sense now Link to comment https://www.sau.com.au/forums/topic/137067-gt2860r-7-or-5-response/page/2/#findComment-4173733 Share on other sites More sharing options...
heller44 Posted October 4, 2008 Share Posted October 4, 2008 2860-5's with dumps, injectors, afm upgrade, and pfc.. Making 350rwhp at the moment. Stock before, everything. Even though my previous dyno run and the one after were done on different dynos with a slightly different settings used, When I plotted the old run over the new one the two runs start rising at almost the same road speed, with the -5's just walking away after max psi was reached. On the road it doesn't feel much different in the low revs, but with a lot more urge in the mid, and without the umph slowing as much to revlimit (set at 7500rpm). Hope my experiences help others. James. Link to comment https://www.sau.com.au/forums/topic/137067-gt2860r-7-or-5-response/page/2/#findComment-4174575 Share on other sites More sharing options...
Blitz_R33 Posted October 11, 2008 Share Posted October 11, 2008 Here is the setup of my car R33 GTR: Twin Garrett GT2860R-5 HKS Actuators HKS twin 2.5inch exhaust (twin 2.5s from dump back) Tomei Dumps Tomei Poncams (260degree, 9.15 lift) Top Secret Camgears Apexi pod filters SARD FPR SARD 650cc Injectors Walbro 341 fuel pump Power FC D-Jetro HKS EVC V5 Car goes in for a tune next Saturday. Once i get the figures, Ill let you know. Link to comment https://www.sau.com.au/forums/topic/137067-gt2860r-7-or-5-response/page/2/#findComment-4189109 Share on other sites More sharing options...
some_cs_student Posted October 12, 2008 Share Posted October 12, 2008 BlitzR33 and others, are you also adding your info to the RB26 aftermarket turbo sticky? That keeps a summary of mods/power levels of RB26's in this section of the forum Link to comment https://www.sau.com.au/forums/topic/137067-gt2860r-7-or-5-response/page/2/#findComment-4189380 Share on other sites More sharing options...
joeleo87 Posted October 12, 2008 Share Posted October 12, 2008 the RB26 dyno results is some what helpful but in terms of response etc its not really helpful. im with some cs student god knows it would clear up a few threads lol. Link to comment https://www.sau.com.au/forums/topic/137067-gt2860r-7-or-5-response/page/2/#findComment-4189519 Share on other sites More sharing options...
Mr. Keets Posted October 12, 2008 Share Posted October 12, 2008 ...OK......If you want some serious usable power mid to high range the -5's are good.But I only suggest -5's if you contemplate upgrading Computer,Cams,Dumps,Injectors at a latter stage or if you are thinking it will be a work in progress.... Spot on TK. 2860-5's All done minus the cams...430hp atw. The response Vs Power debate has been visited many times on SAU. In the end you have to sacrifice one or the other to a degree. If you want both get a supercharger. It sounds like your after the -7's/GT-SS's but you may want mo powa later on...it's addictive apparently. I think the best way to figure out what works for you is to get a ride in a line with the set up your after. If you have a tuner that you use, ask him if he could help set up a ride with a fellow customer or failing that talk to someone in the club. Link to comment https://www.sau.com.au/forums/topic/137067-gt2860r-7-or-5-response/page/2/#findComment-4189761 Share on other sites More sharing options...
FLY12N Posted October 13, 2008 Share Posted October 13, 2008 Dang, I bought a set of of -7's. Think I want -5's now tho Anyone wanna swap? Link to comment https://www.sau.com.au/forums/topic/137067-gt2860r-7-or-5-response/page/2/#findComment-4192680 Share on other sites More sharing options...
Blitz_R33 Posted October 21, 2008 Share Posted October 21, 2008 (edited) Here is the setup of my car R33 GTR:Twin Garrett GT2860R-5 HKS Actuators HKS twin 2.5inch exhaust (twin 2.5s from dump back) Tomei Dumps Tomei Poncams (260degree, 9.15 lift) Top Secret Camgears Apexi pod filters SARD FPR SARD 650cc Injectors Walbro 341 fuel pump Power FC D-Jetro HKS EVC V5 Car goes in for a tune next Saturday. Once i get the figures, Ill let you know. Picked up my car from the Tuner this morning. Car was tuned for mid-range power. At 14.9psi it was 261.4awkw & at 20psi it was 292.1awkw... I'm very happy with my results and I'm sure I can get a few more horses out of it with a little more fine tuning. Edited October 21, 2008 by Blitz_R33 Link to comment https://www.sau.com.au/forums/topic/137067-gt2860r-7-or-5-response/page/2/#findComment-4209162 Share on other sites More sharing options...
Johnny Posted October 21, 2008 Share Posted October 21, 2008 ^^^^ very nice power! How does it feel on the street; much more laggy? Link to comment https://www.sau.com.au/forums/topic/137067-gt2860r-7-or-5-response/page/2/#findComment-4209412 Share on other sites More sharing options...
R31Nismoid Posted October 21, 2008 Share Posted October 21, 2008 Only 290rwkw from -5's ??? They should be up around 350rwkw @ 20psi. Unless the turbos aren't -5's perhaps... Either way for the turbos you 'should' have, the power doesnt sit right at all Link to comment https://www.sau.com.au/forums/topic/137067-gt2860r-7-or-5-response/page/2/#findComment-4209420 Share on other sites More sharing options...
badgtr34 Posted October 21, 2008 Share Posted October 21, 2008 yeah dude.. with those mods which are very similar to mine, only difference is injetor size by 50cc which isnt a lot, you should be easy 330rwkw.. at what rpm is your boost coming on? Link to comment https://www.sau.com.au/forums/topic/137067-gt2860r-7-or-5-response/page/2/#findComment-4209475 Share on other sites More sharing options...
Blitz_R33 Posted October 21, 2008 Share Posted October 21, 2008 (edited) Only 290rwkw from -5's ???They should be up around 350rwkw @ 20psi. Unless the turbos aren't -5's perhaps... Either way for the turbos you 'should' have, the power doesnt sit right at all I know with those turbos I should be getting lots more power. I told the tuner to just tune it to mid-range power and not dyno-queen power. Plus with stock internals, I don't want to push much more power since I don't want anything to blow. I'm sure down the track I'll be bored with 292KillerWasps and I'll tell the tuner to turn it into a dyno-queen... Edited October 21, 2008 by Blitz_R33 Link to comment https://www.sau.com.au/forums/topic/137067-gt2860r-7-or-5-response/page/2/#findComment-4209498 Share on other sites More sharing options...
Blitz_R33 Posted October 21, 2008 Share Posted October 21, 2008 ^^^^ very nice power!How does it feel on the street; much more laggy? I haven't had a chance to drive it much..Just picked it up at 9:30 this morning, then drive it to work.. I did notice that boost kicks in just after 3000rpm so its virtually like stock turbos! Im still babying it in case something goes wrong Link to comment https://www.sau.com.au/forums/topic/137067-gt2860r-7-or-5-response/page/2/#findComment-4209502 Share on other sites More sharing options...
R31Nismoid Posted October 21, 2008 Share Posted October 21, 2008 I know with those turbos I should be getting lots more power. I told the tuner to just tune it to mid-range power and not dyno-queen power. Plus with stock internals, I don't want to push much more power since I don't want anything to blow. I'm sure down the track I'll be bored with 292KillerWasps and I'll tell the tuner to turn it into a dyno-queen... i'll try a bit clearer) that only 290rwkw @ 20psi. There is something wrong or not quite right. Safe tune and a setup being 'down' easily 60rwkw are two different things IMO. A 'safer' tune you might expect 20rwkw or something. Even a safe tune will net 330rwkw on a stock motor. Hell people make 380rwkw on them no worries on a proper motor and perfectly safe. I just have a feeling that your tune would be 'lazy' with so little timing or something else too make such a low power output, that you would more than likely be better off lowering boost to say ~16psi and running 300rwkw by bringing the timing and whatever else up to match it. Would make the car so different and much nicer to drive without really stressing anything at all as your running less boost to begin with Same power with less boost would be much better than a lazy 20psi setup @ the same power level give Your making less than GT-SS/-7's would on 20psi, and they are a smaller/more responsive turbo to boot on a 'safe' tune as well Do you have a graph with AFR's at all? Link to comment https://www.sau.com.au/forums/topic/137067-gt2860r-7-or-5-response/page/2/#findComment-4209603 Share on other sites More sharing options...
Blitz_R33 Posted October 21, 2008 Share Posted October 21, 2008 (edited) Thanks for the advice R31Nismoid. I didn't get a printout of the AFR graph.. I'll go and have a chat to my tuner this wkend... I was reading this thread http://www.skylinesaustralia.com/forums/Rb....html&st=80 adn noticed that a few of the guys are getting the same figures I'm getting. Here is a post from 700HP-GTR33 who has similar mods to me: 96' GTR33 Garrett 2860R-5(HKS 2530 Equivalents) Hks Split dumps Tune agent manifolds Nismo oil pump Nismo water pump Nismo fuel pump Nismo fuel regulator 700cc Sard injectors Iritop sparks Split-fire coils Trust oil cooler,with relocation filter. Cusco catch can Tomei air intake with Pods 3"Cat, Custom 3" exhaust,3" Resinator ohmy.gif with 3" Xforce Hotdog Apexi power fc AVCR boost controller ARC FMIC HKS Cam gears @ 4 Wheels Max Power 260.3kW @7183RPM (1.3 Bar) Max M.A.P 223.6kPa @7055RPM (1.3 Bar) Future plans> Z32 AFMS, Tomei Poncams 260 Degree with 9.15 lift . Fitted RB25 AFM's Tomei Poncams @ 4 Wheels Max Power 274.7kw @ 6963 RPM (1.3 BAR) Max Torque 924.8 Nm @ 4803 RPM Max M.A.P. 230.4 kPa @ 4665 RPM The Boost controller was not set up correctly the last tune....so reflecting the before tune curve. and a20089: 96 GTR V-specTuner Croydon Power 266.5 @ 18PSI on new "fuel efficent" tune (low reading dyno) Power 265 @ 17.5-18 PSI on full fuel (Croydon dyno) Power 244.1 @ 15PSI on full fuel (Croydon dyno) Mods K&N panel Airfilter Full exhust with 5" CAT Pair Garrett 2860-5 turbo's Apexi Power FC Blitz ID-3 boost controller Jun Cam gears Stainless dumps Edited October 21, 2008 by Blitz_R33 Link to comment https://www.sau.com.au/forums/topic/137067-gt2860r-7-or-5-response/page/2/#findComment-4209673 Share on other sites More sharing options...
R31Nismoid Posted October 21, 2008 Share Posted October 21, 2008 i could get some showing 380rwkw hehe, but you see my point i think Link to comment https://www.sau.com.au/forums/topic/137067-gt2860r-7-or-5-response/page/2/#findComment-4209744 Share on other sites More sharing options...
Johnny Posted October 21, 2008 Share Posted October 21, 2008 I haven't had a chance to drive it much..Just picked it up at 9:30 this morning, then drive it to work.. I did notice that boost kicks in just after 3000rpm so its virtually like stock turbos! Im still babying it in case something goes wrong Ahh i see but still at 3000rpm; not too bad at all. I am changing my turbos soon and think ill be going gt-ss as i wont be changing camshafts like you. I really like the stock turbo response but im a bit paranoid about the stockers going pop on me. Plus labour will be cheaper as ill add some tomei dump pipes at the same time. Please keep us updated when you have the chance to take it out on a nice open road; would love to read your 'impression' well done mate! Link to comment https://www.sau.com.au/forums/topic/137067-gt2860r-7-or-5-response/page/2/#findComment-4209761 Share on other sites More sharing options...
Blitz_R33 Posted October 21, 2008 Share Posted October 21, 2008 Ahh i see but still at 3000rpm; not too bad at all.I am changing my turbos soon and think ill be going gt-ss as i wont be changing camshafts like you. I really like the stock turbo response but im a bit paranoid about the stockers going pop on me. Plus labour will be cheaper as ill add some tomei dump pipes at the same time. Please keep us updated when you have the chance to take it out on a nice open road; would love to read your 'impression' well done mate! I know nothing about cars (I'm a IT guy), but for a cheap mod I would strongly recommend adding CamGears & Camshaft to your list. they are a cheap mod and you get great response & power. I had them in my car alongside the stock turbos and the response was amazing. With only the cam gear/shaft, exhaust, filter I was getting 215awKW. If you do upgrade cam gear/shaft go and buy the Garret GT2860R-5 turbos as they are much cheaper then the HKS GT-SS turbos. Get them all fitted at once because its going to save you on labor costs. Camgears/shaft + Garret GT2860R-5 turbos + tomie dump pipes will still allow you to drive the car with a stock ECU. Link to comment https://www.sau.com.au/forums/topic/137067-gt2860r-7-or-5-response/page/2/#findComment-4209820 Share on other sites More sharing options...
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