Ole_1987 0 Posted February 24, 2008 Hi. I wan't to get more power out of my 205 1.3 Rallye with 2xWeber DCOM 40mm What are the suggestions? Another cam, but which? I've heard a lot mentioning CatCams. What can be done with the cylinderhead? increasing the compression with other pistons? Share this post Link to post Share on other sites
Sandy 189 Posted February 24, 2008 Perhaps the Catcam 4901101, but advanced to inlet 2.15mm at TDC. Any wilder is likely to bring small gains in peak power for big losses in driveability and mid range power. Head wise, the bigger valve TU heads (39.5mm inlets) work very well as they are and great care must be taken to bring small improvements without spoiling driveability and mid range power (again!) Using a 1360cc crank would be tempting, it brings alot more potential to the 106 1.3 engine, but i'm not sure it's practical in the 205 1.3 engine, due to the shorter rods and block; you'd really have to plan another engine from scratch to do that. Share this post Link to post Share on other sites
christopher 5 1 Cars Posted February 24, 2008 (edited) Ole what kind of increase in performance are you after and how far you are prepared to go. The 205 Rallye is a Retro icon (in my humble opinion) and very hard to improve on. Most in denmark have been ruined by chavs or crashed.. It's a crying shame.. I would be very careful about your choice of cams. The TU24 cam is already quite wild. I would think twice about choosing anything less then the wildest road catcam or you may end up loosing power... In fact this cam was based on the TU24 can according to Catcams.. The head flows very well as standard. You will need someone who knows what they doing and deep pockets to get any increase at all...The inlets values are almost the same as the 1.6 engines 39.3mm. The group A's made aboout 140bhp. But they were highly modified Edited February 24, 2008 by christopher Share this post Link to post Share on other sites
Ole_1987 0 Posted February 25, 2008 Perhaps the Catcam 4901101, but advanced to inlet 2.15mm at TDC. Any wilder is likely to bring small gains in peak power for big losses in driveability and mid range power. Head wise, the bigger valve TU heads (39.5mm inlets) work very well as they are and great care must be taken to bring small improvements without spoiling driveability and mid range power (again!) Using a 1360cc crank would be tempting, it brings alot more potential to the 106 1.3 engine, but i'm not sure it's practical in the 205 1.3 engine, due to the shorter rods and block; you'd really have to plan another engine from scratch to do that. Thank you very much. Ole what kind of increase in performance are you after and how far you are prepared to go. The 205 Rallye is a Retro icon (in my humble opinion) and very hard to improve on. Most in denmark have been ruined by chavs or crashed.. It's a crying shame.. I would be very careful about your choice of cams. The TU24 cam is already quite wild. I would think twice about choosing anything less then the wildest road catcam or you may end up loosing power... In fact this cam was based on the TU24 can according to Catcams.. The head flows very well as standard. You will need someone who knows what they doing and deep pockets to get any increase at all...The inlets values are almost the same as the 1.6 engines 39.3mm. The group A's made aboout 140bhp. But they were highly modified I use the car for daily driving, so i hope not to loose to much power in the midrange area.. It's a retro car yes and there aren't many left. I'm trying to make it as original as possible. Thanks for your input. I'll consider the "tuning" again.. Share this post Link to post Share on other sites
arnold naber 2 Posted February 25, 2008 I have a 304degree Dr. Schrick in my rallye...but i wouldn't advice that for daily use Share this post Link to post Share on other sites
205Rallee 59 Posted February 25, 2008 If someone can tell me how to do it I can send you photos of a TU24 head modified by someone who didn't know what they were doing and then photos of the same head which has been modified by Longman Racing last week. Share this post Link to post Share on other sites
arnold naber 2 Posted February 25, 2008 upload the images to imageshack.. than [ IMG ] www.imageshack. com / yourphoto.jpg [ /img] Without the spaces Share this post Link to post Share on other sites
arnold naber 2 Posted February 25, 2008 Here the pictures of 205rallee... they guys who didn't know what they were doing: the same head which has been modified by Longman Racing last week. Share this post Link to post Share on other sites
christopher 5 1 Cars Posted February 25, 2008 Nice How much did you get skimmed off 205Rallye? What the grey part at the top of the guide boss? Is it grease or something else? Share this post Link to post Share on other sites
205Rallee 59 Posted February 26, 2008 Nice How much did you get skimmed off 205Rallye? What the grey part at the top of the guide boss? Is it grease or something else? Not sure how much they took off the head but with the standard pistons and the thicker meillor head gasket it will have a comp ratio of 10.8:1. Unfortunately the guy that did the head the first time skimmed too much off the head. The grey stuff is a seal or lubricant so I'm told. Share this post Link to post Share on other sites
pug_ham 240 3 Cars Posted February 26, 2008 What did the headwork @ Longmans cost if you don't mind me asking? Graham. Share this post Link to post Share on other sites
