Nick Posted December 11, 2003 Share Posted December 11, 2003 I'm still thinking about turbos, whether to go single, twin or whatever. Latest thought is can the HKS 2835 kit be ordered but with smaller turbos, say 2530's?? Would they even fit and be compatible with the manifold etc? I phoned HKS Europe but they said I should refer my question to a dealer, in other words they get enough people phoning them up asking them questions - go away. The 2835'S are too much for what I want. I don't want to up rate the internals or use race fuel so I can't use them to their full potential. A pair of smaller turbines however with less lag running more boost sounds much better.... Quote Link to comment Share on other sites More sharing options...
Dragonball Posted December 11, 2003 Share Posted December 11, 2003 Nick m8 Either the Boostlogic kit or the hybrid rioute m8 - best of both worlds! Quote Link to comment Share on other sites More sharing options...
Guest Terry S Posted December 12, 2003 Share Posted December 12, 2003 There is a little more to it than that Paul......... Nick, you need to decide on the type of driving you are going to do, when you would like to be on full power in top gear ( rpm wise) and then select a turbo from there. HKS do various smaller kits for the Skyline, so I assume they are made for the 2JZ. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted December 13, 2003 Share Posted December 13, 2003 Originally posted by Nick I'm still thinking about turbos, whether to go single, twin or whatever. Latest thought is can the HKS 2835 kit be ordered but with smaller turbos, say 2530's?? Would they even fit and be compatible with the manifold etc? I phoned HKS Europe but they said I should refer my question to a dealer, in other words they get enough people phoning them up asking them questions - go away. The 2835'S are too much for what I want. I don't want to up rate the internals or use race fuel so I can't use them to their full potential. A pair of smaller turbines however with less lag running more boost sounds much better.... As they are gareet based you could buy as is, and cahnge the housings, but it's an inefficient way of getting the desired sizing. I still think a single is the best way to go, myself. Quote Link to comment Share on other sites More sharing options...
Ian C Posted December 13, 2003 Share Posted December 13, 2003 Water cooled or not, though? That's the question on my mind at the moment... If you could get a single turbo kit but it had no water jacket, would it be a) bargepole material, b) regular oil changes, or c) time to fit an oil cooler? -Ian Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted December 13, 2003 Share Posted December 13, 2003 Don't give water cooled housings a second thought, personally I would prefer a dry housing, one less theing to plumb and go wrong. They are only designed for road cars where the driver may shut off immediately after a high boost motorway session. Shut the engine off sympathetically and a dry housing is just as good and less hassle. Quote Link to comment Share on other sites More sharing options...
Wez Posted December 13, 2003 Share Posted December 13, 2003 Originally posted by Chris Wilson Don't give water cooled housings a second thought, personally I would prefer a dry housing, one less theing to plumb and go wrong. They are only designed for road cars where the driver may shut off immediately after a high boost motorway session. Shut the engine off sympathetically and a dry housing is just as good and less hassle. Glad you commented on that chris, I have been wondering what the advantages were as my new turbo doesnt have water cooling. Quote Link to comment Share on other sites More sharing options...
Ian C Posted December 15, 2003 Share Posted December 15, 2003 Originally posted by Chris Wilson Don't give water cooled housings a second thought, personally I would prefer a dry housing, one less theing to plumb and go wrong. They are only designed for road cars where the driver may shut off immediately after a high boost motorway session. Shut the engine off sympathetically and a dry housing is just as good and less hassle. -Ian Quote Link to comment Share on other sites More sharing options...
Weka Posted December 15, 2003 Share Posted December 15, 2003 Nick What about the HKS GT-RS? Have you considered them? That's what I've got now. Not sure if you remember, I had 2530s before and wanted more power. Like you, the 2835 were a bit too much fo rme. So I think the RSs will be a good compromise as its comprised of a 2530 exhaust turbine and 2835 compressor. So hopefully it will produce power similar to 2835 and spin up quicker. Won't know for sure until it is fitted next month though. Quote Link to comment Share on other sites More sharing options...
Thorin Posted December 15, 2003 Share Posted December 15, 2003 Originally posted by Weka Nick What about the HKS GT-RS? Have you considered them? That's what I've got now. Not sure if you remember, I had 2530s before and wanted more power. Like you, the 2835 were a bit too much fo rme. So I think the RSs will be a good compromise as its comprised of a 2530 exhaust turbine and 2835 compressor. So hopefully it will produce power similar to 2835 and spin up quicker. Won't know for sure until it is fitted next month though. Hmm, interesting. You'll have to let us know what they're like when you get them fitted Weka. Quote Link to comment Share on other sites More sharing options...
Guest Terry S Posted December 16, 2003 Share Posted December 16, 2003 There are single turbo kits which perform as well/better than the HKS and represent better VFM. Anyone looking at a single or twins really needs to do there home work, learn how to read turbo charts and learn how to relate it to their engines ability to swallow the flow. Then if the turbo's surge, you have no one to blame but yourself..... Quote Link to comment Share on other sites More sharing options...
Nick Posted December 16, 2003 Author Share Posted December 16, 2003 Been away for the weekend so I'm a bit late getting back to this... Terry - I completely agree. Toyota spent a lot of time, effort and money developing the turbo setup on the Supra and I'm very keen to make sure that the one I replace it with is going to give me exactly what I want and be worth the expense. Have you got any links for good info?? Single does seem like the way to go, certainly the easiest. Would twins spool quicker though...?? Quote Link to comment Share on other sites More sharing options...
Adam W Posted December 16, 2003 Share Posted December 16, 2003 Twins won't spool any quicker at all. There is just more stuff to go wrong, more pipework for all the air to go through, and more weight to carry about! Quote Link to comment Share on other sites More sharing options...
Guest Terry S Posted December 16, 2003 Share Posted December 16, 2003 Judging by what I have seen of 2835's the are laggier than some singles now available that are capable of similar power. I did post a link to Steve Vache's excellent turbo comparions chart once. I will try & find the link, but in the mean time see if http://www.moreboost.org works Quote Link to comment Share on other sites More sharing options...
MONKEYmark Posted December 16, 2003 Share Posted December 16, 2003 i would not consider a twin setup, a single turbo can and do get good power and look easy enough to plumb in. you can get mid size turbos that spool fast and have decent power. the sp67gtq is supposed to be good also i like the boost logic kit with tubular manifold and all pipework not much more than hybrid setup and more power. only seen 2 supras over here with the twin set up, nitto and christian. also did leon have them too? twin turbos look good under bonnet. dont know anything about turbo maps. but might be worth taking a chance on midsize turbo. you could always buy a bigger turbo once you have the kit installed. they pretty cheap enough for turbo on its own. let us know what you go for. like to see all these projects starting up. will be good seeing them run this year. Quote Link to comment Share on other sites More sharing options...
Guest Terry S Posted December 16, 2003 Share Posted December 16, 2003 There is no doubt that the HKS twins are capable units, you only have to look at Leon's performance at TOTB1 with a relitively simple set up. I also personally witnessed the car making 630 bhp on super unleaded about 3 years ago. The thing I find unacceptable is the lag. My new turbo makes boost approx 800 ~ 1000 rpm earlier but with similar flow capabilities, but it's a fair bit of work finding the right set up. I am on my 3rd turbo now. The first surged like a bast4rd despite a well respected US tuners recomendation and subsequent sale of the kit. Before you ask, no I won't tell you, and also it may not work with another car as I have head work and cams. This is nothing to do with not wanting individuals to benefit, but I am aware that there are tuners who still look at the BBS and I am not doing their R&D for them. Quote Link to comment Share on other sites More sharing options...
Nick Posted December 16, 2003 Author Share Posted December 16, 2003 Thanks guys, and thanks for the link Terry. Got some reading to to do... If I decide to go ahead with it I'll let you know what I've had done. Got to say I'm rapidly going off the idea of twins... Quote Link to comment Share on other sites More sharing options...
Keith C Posted December 16, 2003 Share Posted December 16, 2003 Originally posted by Nick Got to say I'm rapidly going off the idea of twins... Must be the first bloke in the world to ever say that! Quote Link to comment Share on other sites More sharing options...
Guest Terry S Posted December 16, 2003 Share Posted December 16, 2003 Originally posted by Keith C Must be the first bloke in the world to ever say that! Classic Keith:D That must be the only reason HKS sell so many kits Quote Link to comment Share on other sites More sharing options...
springbok Posted May 13, 2005 Share Posted May 13, 2005 Terry, I was interested to read what you say about twins/singles etc. I am surprised you say the singles spin up faster approx 800/1000 rpm sooner. I always thought if you want to build a fast "road car" then twins are the answer. If you want big BHP and top speed then go single and wait for it to all crank up!! I thought twins would give you a better torque curve. Hence smoother, and generally more on tap all round at any speed range unless you were really moving at which point the singles would be in their sweet spot. Alan Quote Link to comment Share on other sites More sharing options...
Guest Terry S Posted May 13, 2005 Share Posted May 13, 2005 wow Blast from the past. That is our experience of the HKS Twins, they are very laggy. Understand your point but real world it hasnt turned out to be the case. Quote Link to comment Share on other sites More sharing options...
Bobbeh Posted May 13, 2005 Share Posted May 13, 2005 This lag issue is only really a problem with autos isnt it. I mean with a 6 speed you just drop it down a cog. Quote Link to comment Share on other sites More sharing options...
Guest Terry S Posted May 13, 2005 Share Posted May 13, 2005 Depends, I hate it, some may find it acceptable. Also Bobbeh, the power band is important to me and others, with a laggy turbo you have a narrower powerband. That is a nightmare on the track, country lanes etc. Not as much of an issue on a dual carriage way. Quote Link to comment Share on other sites More sharing options...
Bobbeh Posted May 13, 2005 Share Posted May 13, 2005 Indeed, thats like having a huge single. No power at low revs, then too much power coming on line making it a nightmare to drive. Doesnt the first turbo with the HKS make it a decent power band? I mean they cant be both bad. Just looking at Christians times, his is an auto and was getting similar times to you on your small single. Quote Link to comment Share on other sites More sharing options...
Alex Posted May 13, 2005 Share Posted May 13, 2005 Bob, Holly has a higher stall TC now. This is what's made the difference to the 1/4mile times (thank god! really happy that she's producing the times now). When you say the HKS first turbo...do you mean one on it's own would be enough or do you think they run sequentially? Quote Link to comment Share on other sites More sharing options...
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