JamieP Posted October 23, 2006 Share Posted October 23, 2006 What would people advise cams wise for me... might be sticking with the T88, not made my mind up yet... but if i do change it will be another big tubby along the lines of maybe a HKS T51 kai bb.. And i will be reving to 8k. Many thanks jamie:) Quote Link to comment Share on other sites More sharing options...
Wez Posted October 23, 2006 Share Posted October 23, 2006 At a guess for that sort of application a pair of 272s. I am still trying to decide myself Quote Link to comment Share on other sites More sharing options...
TLicense Posted October 23, 2006 Share Posted October 23, 2006 Me too. Can't decide if it's worth waiting to see how she goes on the stockers first, and then swap them for something else. Quote Link to comment Share on other sites More sharing options...
JustGav Posted October 23, 2006 Share Posted October 23, 2006 I'd speak to the informative Ian C.... he seems to know what he is talking about when it comes to cams and has done some ACTUAL testing. Quote Link to comment Share on other sites More sharing options...
b_have Posted October 23, 2006 Share Posted October 23, 2006 Love my 264's (reving to 7400) Quote Link to comment Share on other sites More sharing options...
JamieP Posted October 23, 2006 Author Share Posted October 23, 2006 I'd speak to the informative Ian C.... he seems to know what he is talking about when it comes to cams and has done some ACTUAL testing. Im hopeing Ian will see the thread soon... Quote Link to comment Share on other sites More sharing options...
JamieP Posted October 23, 2006 Author Share Posted October 23, 2006 Love my 264's (reving to 7400) yea thats what im thinking unless people advise otherwise:) Quote Link to comment Share on other sites More sharing options...
Wez Posted October 23, 2006 Share Posted October 23, 2006 I am running the stock cams and my dyno does show that after 4800 - 5000rpm my power/torque starts to fall off, I guess with better cams it could hold it till redline. Quote Link to comment Share on other sites More sharing options...
TLicense Posted October 23, 2006 Share Posted October 23, 2006 yea thats what im thinking unless people advise otherwise:) If you've got the tubbie to support it, I would rev as high as you feel that you can without the engine letting go. Aren't you building an engine? If so, and it's done right, and your actually getting worthwhile gains from doing it, then there's nothing to stop you from having that as a base setting, and then raise it for for the occasional race type scenario. With a proper built bottom end and head, I personally think that you could get away with small blasts to 8K. But you would obviously need to realise that your engine life will be shortened considerably. But hey, everythings a trade-off. Actually, I've heard of your reputation, it will just spend it's entire life at the high setting. Quote Link to comment Share on other sites More sharing options...
JohnA Posted October 24, 2006 Share Posted October 24, 2006 Jamie, What's your exh A/R? Quote Link to comment Share on other sites More sharing options...
Alex Posted October 24, 2006 Share Posted October 24, 2006 Your cam choice depends on rev limit. Quote Link to comment Share on other sites More sharing options...
JamieP Posted October 24, 2006 Author Share Posted October 24, 2006 If you've got the tubbie to support it, I would rev as high as you feel that you can without the engine letting go. Aren't you building an engine? If so, and it's done right, and your actually getting worthwhile gains from doing it, then there's nothing to stop you from having that as a base setting, and then raise it for for the occasional race type scenario. With a proper built bottom end and head, I personally think that you could get away with small blasts to 8K. But you would obviously need to realise that your engine life will be shortened considerably. But hey, everythings a trade-off. Actually, I've heard of your reputation, it will just spend it's entire life at the high setting. Yep the engine is fully built and ill be reving to 8k. On the old stock engine when dan was fine tunning the map on the rd i asked him to raise it to 7.5k for a couple of blasts.... the change was awesome, the T88 really came alive thats why i want a 8k rev limit;) Quote Link to comment Share on other sites More sharing options...
JamieP Posted October 24, 2006 Author Share Posted October 24, 2006 Jamie, What's your exh A/R? Mines a T88-34D, some specs here;) http://website.lineone.net/~jon_ed/Turbo_Table.htm Quote Link to comment Share on other sites More sharing options...
Ian C Posted October 24, 2006 Share Posted October 24, 2006 I haven't done any testing beyond the stock rev limit Well, not proper testing, anyway. I know my 256/264 seemed to tail off a bit after 6800/7000 but that could have been anything really. Charlie likes his upped rev limit, maybe the 264 intake really helps at that point above the 256. 272s do start to come into play at that area from what I've read about over the years - depends on what you are after, but if you put up with a T88 then low down power sacrifice isn't an issue A pair of 272's will give you massive breathing once you are on boost high up in the rev range. You could try the inverse stagger 272/264 but apparently if you get it 0.5degrees in any direction off some perfect nirvana setting it's as rubbish as I found it -Ian Quote Link to comment Share on other sites More sharing options...
Wez Posted October 24, 2006 Share Posted October 24, 2006 How about 264/272, just an idea Quote Link to comment Share on other sites More sharing options...
JamieP Posted October 24, 2006 Author Share Posted October 24, 2006 To confusing.. i dont know what to do:( Ive had a good search on supraforum as they like there big tubby but no joy there. Quote Link to comment Share on other sites More sharing options...
Wez Posted October 24, 2006 Share Posted October 24, 2006 To confusing.. i dont know what to do:( Quote Link to comment Share on other sites More sharing options...
Ian C Posted October 24, 2006 Share Posted October 24, 2006 To confusing.. i dont know what to do:( Ive had a good search on supraforum as they like there big tubby but no joy there. They usually fit the widest cams they can lay their hands on, there is a move towards 280s now. Great for peak power figures I suppose. They used to pair 272s until those came out. Oh, anything over 10mm of lift = inteference head as well, the Jun 272s and probably any 280s can do that so you have to weigh up maximum power vs your expensive built engine being minced due to a mundane snapped cambelt. -Ian Quote Link to comment Share on other sites More sharing options...
JamieP Posted October 24, 2006 Author Share Posted October 24, 2006 Are you saying 272/272 could damage my engine? Edit... just re read are you saying stay away from jun cams? Quote Link to comment Share on other sites More sharing options...
Wez Posted October 24, 2006 Share Posted October 24, 2006 Look here :- http://www.moreboost.org/cams.htm If they are 10mm and over then it becomes inteference and yes will screw your engine on cambelt failure. Jun do 272s in 9.3mm and 10.8mm. Quote Link to comment Share on other sites More sharing options...
Ian C Posted October 24, 2006 Share Posted October 24, 2006 I'm not rubbishing them or anything, I'm just saying that one of two types of JUN 272 cams have just over 10mm of lift so if the cam belt goes, the pistons stand a good chance of hitting the stuck open valves. The HKS 272s don't have enough lift to do this. -Ian Quote Link to comment Share on other sites More sharing options...
Alex Posted October 24, 2006 Share Posted October 24, 2006 I'd go for 264/272 on JUN cams. (9.3mm lift each) Quote Link to comment Share on other sites More sharing options...
Alex Posted October 24, 2006 Share Posted October 24, 2006 The JUN 272's come in 9.3mm and 10.8mm lift versions. Quote Link to comment Share on other sites More sharing options...
JamieP Posted October 24, 2006 Author Share Posted October 24, 2006 Thanks for everyone advise:) ... i just brought pair hks 272's Quote Link to comment Share on other sites More sharing options...
Wez Posted October 24, 2006 Share Posted October 24, 2006 Should have said, I have a HKS 272 inlet and so does Ian C. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.