corrupt Posted December 15, 2005 Author Share Posted December 15, 2005 yeh, i like the idea of a rugged mild steel pipe out the rear, but i bought this dumptip bigbore ages ago and dont want it ending up a waste of money, so id rather use what it, it will also act as another resinator which i need. in the future ill probably remove the ricecannon and put a proper sports muffler on the rear, and have a 3" mild steel pipe coming out. alos the cortina is much bigger than an escort, and something big out the back doesnt look out of place like it does on escorts, atm on my banged up cortina i have a rice cannon on the rear, 4" straight tip and it doesnt even look too bad ay [/url] Quote Link to comment Share on other sites More sharing options...
RT Posted December 15, 2005 Share Posted December 15, 2005 its all about differental pressure. you want as much pressure as possable before the turbo and as little pressure as possable after the turbo. do some research.... the info is out there that not just the case bro, an exhaust on a turbo car works in the same way as on a n/a car. Yes you should have it a bit bigger but too big and you will suffer the effects of not enough back pressure just the same as anyone else. By your theory if you had no exhaust after your turbo it would be quick as and this simple isn't the case. 2.25 is too big for a 1300 turbo or not. i take it you've never taken the exchast off your car and gone for a drive then... when you do u'll notice how much earlier the boost kicks in. eg my two rear mufflers on my 1300 are removable (padock days etc...) and it boosts way quicker when not running those on there. not to mention i run a vf10 off a 2l subie on my 1300 and it spools nice an early. talk to some people that build race cars and see what they say. coming back to the size issue.. the longer the exhaust the more exhaust gas the turbine has to push, the bigger the diameter the more exhaust it has to push, both of these decrease the pressure diff across turbine... also as it cools it gets denser so is more to push. The trick is to size it so that it can get the exhaust out asap without making it so big that it's causing a "blockage" due to the volume of exhaust gas it's trying to push out. So as I said, correctly sized exhaust is more important than just sticking on the biggest you can. So the turbo on your 1300 is having to push out a lot of exhaust sitting in your 2.25 pipe.. get it? Quote Link to comment Share on other sites More sharing options...
Guest WESTCORT Posted December 15, 2005 Share Posted December 15, 2005 what pipe diameter would yous suggest for my eski? fully worked 1300... standard system at the moment and after i worked the motor its loud enough. Should i bother with new headers or get second hand ones? Is it worth getting the 90 degree bends chopped out that go over the diff when i get it done? Quote Link to comment Share on other sites More sharing options...
Guest Scheme Posted December 15, 2005 Share Posted December 15, 2005 meh rolla will jsut be 2" straight through from extractors from a 4k or 5k engine... probaly have a coby in there to quiten it down a bit. I dont want a loud exhaust, just a nice deep note. Quote Link to comment Share on other sites More sharing options...
corrupt Posted December 15, 2005 Author Share Posted December 15, 2005 meh rolla will jsut be 2" straight through from extractors from a 4k or 5k engine... probaly have a coby in there to quiten it down a bit. I dont want a loud exhaust, just a nice deep note. yeh, thats what im having/want, just something which sounds nice and deep, but aint loud. Quote Link to comment Share on other sites More sharing options...
SYKOV6 Posted December 15, 2005 Share Posted December 15, 2005 me got 1 3/4 3-1 headers with 8in long collecters into twin 2.5 in into 2.5 ova diff into 3in hedman chambered muffler tried a 3in straight thru went a little better but too drony. take exhaust off for drags so doesnt matter on street Quote Link to comment Share on other sites More sharing options...
excort Posted December 15, 2005 Share Posted December 15, 2005 me and my mate are doing a mini clubman with a 1300 in it with 3-2 exstractors we where thinking of doing twin 2inch pipeing right down to the back to a muffler any ideas if thats a good idea lol ? cheers Quote Link to comment Share on other sites More sharing options...
L0WMK2 Posted December 15, 2005 Share Posted December 15, 2005 mines a real low bassy sound not a high pitched tinnie rice japper exhaust Quote Link to comment Share on other sites More sharing options...
drftnmaz Posted December 15, 2005 Share Posted December 15, 2005 its all about differental pressure. you want as much pressure as possable before the turbo and as little pressure as possable after the turbo. do some research.... the info is out there that not just the case bro, an exhaust on a turbo car works in the same way as on a n/a car. Yes you should have it a bit bigger but too big and you will suffer the effects of not enough back pressure just the same as anyone else. By your theory if you had no exhaust after your turbo it would be quick as and this simple isn't the case. 2.25 is too big for a 1300 turbo or not. i take it you've never taken the exchast off your car and gone for a drive then... when you do u'll notice how much earlier the boost kicks in. eg my two rear mufflers on my 1300 are removable (padock days etc...) and it boosts way quicker when not running those on there. not to mention i run a vf10 off a 2l subie on my 1300 and it spools nice an early. talk to some people that build race cars and see what they say. coming back to the size issue.. the longer the exhaust the more exhaust gas the turbine has to push, the bigger the diameter the more exhaust it has to push, both of these decrease the pressure diff across turbine... also as it cools it gets denser so is more to push. The trick is to size it so that it can get the exhaust out asap without making it so big that it's causing a "blockage" due to the volume of exhaust gas it's trying to push out. So as I said, correctly sized exhaust is more important than just sticking on the biggest you can. So the turbo on your 1300 is having to push out a lot of exhaust sitting in your 2.25 pipe.. get it? i hear what you saying but the turbo isn't pushing shit all its getting pushed, and what your sayin would apply if i had resitrictive mufflers in there but mine are all straight through (coby style). 2.25 isn't that big anyway, most people with worked 4k's would run 2" exchasts anyway mines only 12.5mm bigger. you should try disconneting you exchast after your front pipe and see how much earlyer the boost kicks in. Quote Link to comment Share on other sites More sharing options...
RT Posted December 15, 2005 Share Posted December 15, 2005 It is pushing.. it's pushing all the exhaust out of your pipe, straight through mufflers only lessen this. Boost may well kick in eariler with no exhaust but there is a difference between having no exhaust and a big exhaust. ie. you can't have no exhaust in reality and an oversized exhaust isn't the next best thing. It's about correct sizing. I run 2.25 on my 4.1 Falcon6 and that is correctly sized. Depending on what sized turbo you are running I doubt your 1300 is flowing more gas then me.. Quote Link to comment Share on other sites More sharing options...
eke_zetec_RWD Posted January 3, 2006 Share Posted January 3, 2006 my turbo pinto when it had a shitty exhaust on it only reved to 4000rpm unda boost, off boost it would rev to the limiter. now i made a 2.25inch exhaust all mandrel bends and it revs to the limiter under boost easy. Quote Link to comment Share on other sites More sharing options...
thminiman Posted January 3, 2006 Share Posted January 3, 2006 FUCK... talking about exausts, i blew mine for the third time today... time for new extractors i think: i have the standard 1" extractors going into 1 7/8" pipe... just isnt fucking working... Quote Link to comment Share on other sites More sharing options...
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