turbo-fever Posted August 11, 2015 Share Posted August 11, 2015 Do I need to splash out on a 3" exhaust to get over the 300bhp mark? I will be having the boost turned up on the td05 soon and don't want to restrict it. Which is a good 3" system for the 82 ? Quote Link to post Share on other sites
turbo-fever Posted August 11, 2015 Author Share Posted August 11, 2015 That sounded a bit blunt sorry not long been up ! Quote Link to post Share on other sites
epcashin Posted August 11, 2015 Share Posted August 11, 2015 custom made 3" is the best job mate less retriction the better will cost a good bit for a brand name ehxuast with 3" pipe so custom job is normally the cheapest and then choose a back boxyou defo need 3" for over 300 dont listen to anyone that tells you differ haha Quote Link to post Share on other sites
RobSR Posted August 11, 2015 Share Posted August 11, 2015 You can clear 300 on a 2.5" exhaust, however 3" would be recommended. Bit of future proofing. Quote Link to post Share on other sites
Bussey Posted August 11, 2015 Share Posted August 11, 2015 I have a 3 inch mostly system, with a 2.75 section under the sump, and a 2.5 section over the rear beam. Made 323 with no problems Quote Link to post Share on other sites
morgey Posted August 11, 2015 Share Posted August 11, 2015 I think Racetech do a 3" system iirc? Quote Link to post Share on other sites
abbott Posted August 11, 2015 Share Posted August 11, 2015 Inhave a full 2.5" systemMaking 317bhp and 290torque Quote Link to post Share on other sites
Sefton-EP91 Posted August 11, 2015 Share Posted August 11, 2015 I have a japspeed system with 2.5inch and make 300.9hp and 280lbft of torque. If you want to future proof then go 3" Quote Link to post Share on other sites
tango123 Posted August 11, 2015 Share Posted August 11, 2015 Racetech do one. from memory. around £700 Quote Link to post Share on other sites
wickedep Posted August 12, 2015 Share Posted August 12, 2015 yes you can make more than 300. had a customer put down 280whp on Gt28 on a straight through 2.5" (straight through, no stepdown at downpipe). you can PM me for dyno sheet if you wish. Quote Link to post Share on other sites
RobSR Posted August 13, 2015 Share Posted August 13, 2015 you defo need 3" for over 300 dont listen to anyone that tells you differ haha I think we are all still wrong........ Quote Link to post Share on other sites
turbo-fever Posted August 14, 2015 Author Share Posted August 14, 2015 Think the safe bet is to just go 3" shame it's so bloody expensive lol Quote Link to post Share on other sites
Phil Posted August 14, 2015 Share Posted August 14, 2015 Think the safe bet is to just go 3" shame it's so bloody expensive lolRemove the bottle neck at the bottom of the downpipeAnd you won't have a problem with 2.5/2.75 exhaust Phil Quote Link to post Share on other sites
WallaceGlanza Posted August 14, 2015 Share Posted August 14, 2015 Plenty of bigger engine cars manage 300bhp without a 3" exhaust... a starlet is no different! Quote Link to post Share on other sites
Phil Posted September 24, 2015 Share Posted September 24, 2015 Yeah just to add I'm running the truely tiny hks silent hi power front section it can't be any more than 2 inch and I'll make 300 no probPhil Quote Link to post Share on other sites
goldenvtr Posted September 30, 2015 Share Posted September 30, 2015 Plenty of bigger engine cars manage 300bhp without a 3" exhaust... a starlet is no different! my supra is 372 with a 3"... i suspect it will make a big diffrence when i go 4" but it certainly dosn't feel restricted. on my mx5 going from 2.5" to 3" made 23more hp at thesame boost (13psi) and netted 269bhp, on that alone i would recomend 3" Quote Link to post Share on other sites
daniel_g Posted September 30, 2015 Share Posted September 30, 2015 my supra is 372 with a 3"... i suspect it will make a big diffrence when i go 4" but it certainly dosn't feel restricted. on my mx5 going from 2.5" to 3" made 23more hp at thesame boost (13psi) and netted 269bhp, on that alone i would recomend 3"Are those on actuator setups or EWG? Quote Link to post Share on other sites
goldenvtr Posted December 21, 2015 Share Posted December 21, 2015 Are those on actuator setups or EWG? both of those on ewg BUT rejoined after the downpipes as i dont like screamers anymore lol if ewg with scremer then 2.5 would be plenty Quote Link to post Share on other sites
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