ecksstore 0 Posted March 9, 2005 What difference can I expect from a set of Piper 276 degree cans in an otherwise standard Mi16 engine. I managed to pick a set up pretty cheap but im not sure if a big difference will be felt. Opinions please Share this post Link to post Share on other sites
Ahl 4 Posted March 9, 2005 They should change the characteristics quite a lot. The standard mi16 cams are very mild to help low down tractability. You should gain a fair chunk of power higher up. You may have to skim the head and advance the cam timing to get them working at their best, though I don't know the details. Share this post Link to post Share on other sites
ecksstore 0 Posted March 9, 2005 I might get some headwork done on the motor as I am giving it a freshen up at the moment. Unfortunately I dont have any adjustable pulleys for the cams so I may need a rolling road set up for he once i get her up and running. Share this post Link to post Share on other sites
eddie_1.9 1 Posted April 21, 2006 (edited) Is there no gains to be had then with a totally standard engine with different cam's? I have a totally std S16 (for all intents and purposes's a Mi16 too) which i have read, and as Ahl says, has really quite mild standard cam's. All the cam posts i've read have been for people running TB's or carbs with managent etc, but I can't find any mention of just swapping the cam/s in a bog standard engine. I've been reading about cams and head tuning from 2003 here, and that would suggest that head work isn't needed at all until you start getting towards 300BHP. The inlet cam seems to be the favorite to change so i'm guessing there should be good gains with just an inlet cam change? I know custom management would be need to get the max gains from it but i'm not going that far for the forseable future. What is the best spec inlet cam for a standard Mi? Edited April 21, 2006 by eddie_1.9 Share this post Link to post Share on other sites
Ahl 4 Posted April 21, 2006 The inlet cam seems to be the favorite to change so i'm guessing there should be good gains with just an inlet cam change? Apparently, yes. The exhaust cam flows well enough with most inlets until you start going to quite serious profiles. If you include the word 'catcams' in your search then you should find quite a lot of information on cam swaps. You can gain a fair chunk of power with a standard head and the standard management will compensate for the extra flow up to a point. Share this post Link to post Share on other sites
eddie_1.9 1 Posted April 21, 2006 Cheers mateyo catcams searching it is then... Share this post Link to post Share on other sites
eddie_1.9 1 Posted April 21, 2006 Its all about 1.9Mi's and how you cant run a lairy cam's with the AFM. But with mine being at S16 engine its not got an AFM. This must open up my options a fair bit regarding cam choice. My problem is that i have absolutly no understanding of cam specs, so i don't have even the slightest idea what direction to go in. I was hoping someone more cam savvy then me could say 'you need a x270xx??' cam' for standard management, induction system, exhaust sytem etc etc. I'm quite happy to lose a smooth idle for more power at high RPM's. Share this post Link to post Share on other sites
Ahl 4 Posted April 21, 2006 Ah of course, I forgot it was an s16. I guess that give problems as although the AFM makes the idle on lairy cams a problem, it also enables it to measure the extra flow and add extra fuel, which is something your s16 won't do. You're probably best to start a new topic about your s16 for some specific advice. Share this post Link to post Share on other sites
boombang 2 Posted April 21, 2006 Surely the S16 can go a long way to sort out the fuelling by the MAP sensor, TPS, and lambda? Share this post Link to post Share on other sites
Ahl 4 Posted April 21, 2006 Unfortunately not no. AFAIK it has no way of sensing the actual airflow (while an AFM can) so it may have to be remapped or it might run lean with the increased airflow. Share this post Link to post Share on other sites
boombang 2 Posted April 21, 2006 for airflow to increase wouldn't there be a greater vaccuum? Share this post Link to post Share on other sites
Ahl 4 Posted April 21, 2006 Im not sure of the exact details, but you can have two map sensors that read the same pressure even though one is recieving much more air than the other. Try a search, the information is in the forum somewhere. Share this post Link to post Share on other sites
veloce200 3 Posted April 21, 2006 Ahl is right a map sensor equipped engine won't know there is more air going into the engine, you can get away with exhaust system and inlet mods usually but not cams. Share this post Link to post Share on other sites
