Wez Posted October 22, 2003 Share Posted October 22, 2003 Hey Guys, Was just wondering what the recommended CAM profiles are for inlet and exhaust for stock turbos or small single. I know the J-Spec and UK spec are different as stock, which are better and what sort of improvments could be expected? What make should I go for, HKS, Crower or JUN etc. Regards Wez Link to comment Share on other sites More sharing options...
Paul Whiffin Posted October 22, 2003 Share Posted October 22, 2003 Alright Wes, I'd go for 256in 264ex HKS for your setup, fine for a small single application as well, you'll have a nice improvement accross the rev range. Well worth doing. Link to comment Share on other sites More sharing options...
Wez Posted October 22, 2003 Author Share Posted October 22, 2003 Hey Paul, Thanks for the info. Are they easy to replace, is there anything else worth doing at the same time? Wez Link to comment Share on other sites More sharing options...
Paul Whiffin Posted October 22, 2003 Share Posted October 22, 2003 Yep, pretty easy to do, only extra parts that spring to mind are cam seals, breather pipe that goes between cam covers(they always split with age) and possibly cam cover seals. Let me know if you want them done.... Link to comment Share on other sites More sharing options...
Wez Posted October 22, 2003 Author Share Posted October 22, 2003 How much for supply and install then? :flame Dev Link to comment Share on other sites More sharing options...
Thorin Posted October 22, 2003 Share Posted October 22, 2003 Why is it that people go the smaller 256 inlet cam? Is it just to minimise the lumpy idle or is there another reason? I wouldn't mind the lumpy idle at all, I've heard monkey's Supe and he has 264/264 and it aint that bad at all, actually sounds pretty cool Link to comment Share on other sites More sharing options...
Sharpie Posted October 22, 2003 Share Posted October 22, 2003 I think I'd go with 264/264 too but, not ready just yet. Link to comment Share on other sites More sharing options...
GavinL Posted October 22, 2003 Share Posted October 22, 2003 Originally posted by Thorin Why is it that people go the smaller 256 inlet cam? Is it just to minimise the lumpy idle or is there another reason? I wouldn't mind the lumpy idle at all, I've heard monkey's Supe and he has 264/264 and it aint that bad at all, actually sounds pretty cool I have 264/264 HKS cams, you get used to the lumpy idle after a short time, don't give it a second thought. Link to comment Share on other sites More sharing options...
Wez Posted October 23, 2003 Author Share Posted October 23, 2003 Originally posted by GavinL I have 264/264 HKS cams, you get used to the lumpy idle after a short time, don't give it a second thought. What are power/torque differences compared to 256/264? Kind Regards Wez Link to comment Share on other sites More sharing options...
Roy Posted October 23, 2003 Share Posted October 23, 2003 having not gone on a dyno (yet) and not having a base BPU set-up map, i cannot answer the question of differences but i too have 264's in n ex and barely noticed the lumpiness. only after a hard run at WOT can i discern any hint of slightly lumpier cams. i haven't got my fueling sorted either and am slightly rich i believe but am not sure if this affects cam lumpiness at idle. Link to comment Share on other sites More sharing options...
GavinL Posted October 23, 2003 Share Posted October 23, 2003 Originally posted by Wez What are power/torque differences compared to 256/264? Kind Regards Wez No idea but not a lot I would suggest. Unless someone is prepared to swap cams and dyno with the rest of the car unchanged I doubt you will get anything meaningful from any dyno sheets knocking around on the Internet. HKS don't have cam info on the Supra with stock turbos so no point asking them Link to comment Share on other sites More sharing options...
MONKEYmark Posted October 23, 2003 Share Posted October 23, 2003 264in and 264ex are no bother at all. i did not go for next ones up as i heard you loose bottom end and that they mainly for single turbos. mine seems to idle at 500-600 very slight up n down but you dont notice it. i got them done and had cam belt done at same time Link to comment Share on other sites More sharing options...
Wez Posted October 23, 2003 Author Share Posted October 23, 2003 Hey Mark, Was the difference very noticable, how does it drive compared to stock etc, i don`t really care about idle just the power Link to comment Share on other sites More sharing options...
Paul Whiffin Posted October 23, 2003 Share Posted October 23, 2003 If you dont care about a slightly rough idle go for the 264's defo. Link to comment Share on other sites More sharing options...
MONKEYmark Posted October 23, 2003 Share Posted October 23, 2003 Originally posted by Wez Hey Mark, Was the difference very noticable, how does it drive compared to stock etc, i don`t really care about idle just the power it drives perfect i cant quite put my finger on how it affects car, but to me it feels more revvy. car feels very strong pulling to me. but suppose everybody thinks same about there cars. get it done its another step on the mod list. also do cam belt for peace of mind. its only about £30 for belt thats the reason i got cams to do a cam belt change at same time Link to comment Share on other sites More sharing options...
Ian C Posted October 23, 2003 Share Posted October 23, 2003 I recently went from j-spec cams to HKS 256in 264ex, and the results are here I had the staggered setup because the stock cams, be it j or uk spec, are staggered as well. The exhaust ports and manifold are compromised by the sequential setup and so are basically held open longer than the intake side to compensate. Opening up the intake as much as the exhaust systems won't see you any benefits over a staggered system, and could result in a tad less low down power thanks to overlap causing intake charge pollution. But we are talking about 10bhp here for a couple of thousand rpm low down so it's probably not worth worrying about. My idle still sits at 650rpm or thereabouts, but it's definitely less smooth. It's just like it misses a beat every 4 or so, sounds great The job was easy enough, lots of tricky-to-reach bolts though. You can do it without removing the crank pulley, just by slackening the tensioner. Would be a 1 day job if I had to do it again. Don't forget a reasonable running-in strategy and an oil change afterwards. -Ian Link to comment Share on other sites More sharing options...
randy Posted October 23, 2003 Share Posted October 23, 2003 Does moving from stock Jap spec cams to a 264 in and 264 ex give you more torque or HP? Also is there any difference in spool? Slower spool/ faster spool? Also -- If you were using it on a single like the T67 would these cams help spool the turbos up faster? Link to comment Share on other sites More sharing options...
Ian C Posted October 23, 2003 Share Posted October 23, 2003 Dunno, I went to 256/264 The car went appreciably faster, draw your own conclusions on power increases I didn't notice any changes in turbo characteristics barring, apparently, a slight increase in lag at low speeds on turbo 1. Can't say I'm cursing it now so I guess I've got used to it if it was even there. Couldn't say on spooling a single turbo faster or slower. -Ian Link to comment Share on other sites More sharing options...
SMW Posted October 23, 2003 Share Posted October 23, 2003 I've been thinking about this mod for a while now. Anyone have a rough idea of what I'd expect to pay overall? Had an idea the cams are about £800 is that right? Link to comment Share on other sites More sharing options...
Sharpie Posted October 23, 2003 Share Posted October 23, 2003 £800 for the pair don't think so... Link to comment Share on other sites More sharing options...
dude Posted October 23, 2003 Share Posted October 23, 2003 Originally posted by SMW I've been thinking about this mod for a while now. Anyone have a rough idea of what I'd expect to pay overall? Had an idea the cams are about £800 is that right? Price depends on whether you go for the cams and wheels or just the cams , but without the wheels they will be hard to 'dial' in which will defo make a bit of difference . dude Link to comment Share on other sites More sharing options...
SMW Posted October 24, 2003 Share Posted October 24, 2003 Price depends on whether you go for the cams and wheels or just the cams Okay wasn't going to ask this as it betrays my total ignorance on this subject but here goes:) The wheels??? Do you mean the cam gears Dude? And difficult to dial in? I await the ridicule I undoubtedly deserve Link to comment Share on other sites More sharing options...
Ian C Posted October 24, 2003 Share Posted October 24, 2003 Hmm, when I was researching getting cams I found that £800 for a pair is what you should budget for. You may get up to £100 change from that amount but that doesn't include postage and they are heavy buggers. Dunno where you get yours from Peter Thankfully I got a bargain nearly-new deal off Paul W I didn't bother with the adjustable cam gears as Tezza S found they weren't required for a balanced setup. Sure, you can increase power a bit but only at the expense of comparitively more torque, and vica versa, so you would be paying what, £350+ more for what amounts to sod all benefit. Apart from the fancy colours of course. -Ian Link to comment Share on other sites More sharing options...
dude Posted October 24, 2003 Share Posted October 24, 2003 Dialing in is when the cams are set to exactly the manufacturers spec using a dial guage to find TDC etc and not relying on the stock Toyota timing marks , bit like having your engine blueprinted , made a big diff. on the Yank V8's i used to have IMO its a waste of time fitting the cams without dialing them in , this does not mean alltering them from the stock cam timing just getting them SPOT on . Dude:flame Dev Link to comment Share on other sites More sharing options...
GavinL Posted October 24, 2003 Share Posted October 24, 2003 Originally posted by Ian C Hmm, when I was researching getting cams I found that £800 for a pair is what you should budget for. You may get up to £100 change from that amount but that doesn't include postage and they are heavy buggers. Dunno where you get yours from Peter Thankfully I got a bargain nearly-new deal off Paul W I didn't bother with the adjustable cam gears as Tezza S found they weren't required for a balanced setup. Sure, you can increase power a bit but only at the expense of comparitively more torque, and vica versa, so you would be paying what, £350+ more for what amounts to sod all benefit. Apart from the fancy colours of course. -Ian Cam gears are quite cheap, about £120 a pair rings a bell Link to comment Share on other sites More sharing options...
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