pureguava Posted March 23, 2019 Report Share Posted March 23, 2019 Hello i would love to hear from anyone using the GT3071R turbo and feedback on it. I hear a lot of people saying it would be a good choice and are considering it but very little of it actually in use? after doing all the usual mods to the S4S : allunox manifold bigger charge cooler with electric pump uprated RC injectors 3 inch free flowing exhaust green dot cams aftermarket fuel pump The next logical step is probably a better modern turbo - perhaps the GT3071R is the ticket? Al Quote Link to comment Share on other sites More sharing options...
snowrx Posted March 23, 2019 Report Share Posted March 23, 2019 Seems to be a good fit, they're often suggested. You can get a twinscroll turbine housing for it, which would help the allegedly older design. Borgwarners EFR series has some nice prospects with current design and more features. Quote Link to comment Share on other sites More sharing options...
cammmy Posted April 14, 2019 Report Share Posted April 14, 2019 (edited) I'm currently fitting a GTX2863R. Not a straight swap but I'll put up some detail and the results when finished, if people are interested https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.co.uk%2Fulk%2Fitm%2F192543926850 Theoretically capable of 400hp+ so I shouldn't be taxing it. My injectors are spec'd for ~320 Edited April 14, 2019 by cammmy Quote Link to comment Share on other sites More sharing options...
cammmy Posted April 16, 2019 Report Share Posted April 16, 2019 (edited) Just to further this, the new design of the GTX seems to more than make up for it's smaller size: http://forum.nistune.com/viewtopic.php?t=2293 This is on a SR20 which which is a 2 litre 4 pot that runs very similar cams, so should be a decent comparison. Also consider vernier cam pulleys. I picked up 10hp on my GT3 (stock turbo) just from those. Edited April 16, 2019 by cammmy 2 Quote Link to comment Share on other sites More sharing options...
MrDangerUS Posted October 23, 2019 Report Share Posted October 23, 2019 (edited) Double scroll turbos have a better low band performance. For cars with external wastegate, you may replace only a turbine cover(housing). Look for "MAMBA Turbine Housing Garrett" on eBay! Several different specs covers are available. . Edited October 23, 2019 by MrDangerUS Quote MrDangerUS Link to comment Share on other sites More sharing options...
snowrx Posted October 24, 2019 Report Share Posted October 24, 2019 Compressor maps not ID'd? Quote Link to comment Share on other sites More sharing options...
cammmy Posted October 24, 2019 Report Share Posted October 24, 2019 Forgot to reply to this earlier. I would suggest anything bigger than the GTX2863R is overkill unless you want over 400hp. It had a boost creep issue initially and they were letting off the throttle at 360BHP. I ported the internal gate and am now at 320BHP with 90% duty cycle on the injectors. Even with the 2863, the boost threshold is pushed up a bit from the factory turbo. Quote Link to comment Share on other sites More sharing options...
ragingfool35 Posted October 25, 2019 Report Share Posted October 25, 2019 Cam what was the boost at those HP numbers? are you monitoring your fuel pressure at 90% duty? Quote chris90SEjust because I don't CARE doesn't mean I don't UNDERDSTAND Link to comment Share on other sites More sharing options...
ramjet Posted October 26, 2019 Report Share Posted October 26, 2019 On 24/10/2019 at 13:04, snowrx said: Compressor maps not ID'd? Thought the same thing. Not much use when you don't know what they refer to. Quote All we know is that when they stop making this, we will be properly, properly sad.Jeremy Clarkson on the Esprit. Opinions are like armpits. Everyone has them, some just stink more than others. For forum issues, please contact one of us Moderators. Link to comment Share on other sites More sharing options...
cammmy Posted October 26, 2019 Report Share Posted October 26, 2019 (edited) 11 hours ago, ragingfool35 said: Cam what was the boost at those HP numbers? are you monitoring your fuel pressure at 90% duty? At 320hp It's running 1.1 bar and the Dyno operator noted the injectors are okay and holding 11.4:1 fuel at the top end. I've already put a DW200 fuel pump in and adjustable regulator, which should be able to handle more than this engine could ever produce. The regulator has a gauge on it but I would only be able to see it on the Dyno and I wasn't there last time it was tuned. My plan is rebuild the motor and update the trans. Then go for bigger injectors. I already have updated ones from five0. I only asked for them to support 320hp, as when I was buying as I was only thinking about a super 60 trim compressor at the time. Not a whole new turbo Edited October 26, 2019 by cammmy . Quote Link to comment Share on other sites More sharing options...
cammmy Posted October 26, 2019 Report Share Posted October 26, 2019 Here's the compressor map. Quote Link to comment Share on other sites More sharing options...
Popular Post jfitz981 Posted November 26, 2019 Popular Post Report Share Posted November 26, 2019 @pureguava I bought the GT3071R kit from ATS racing. My car is going into the shop next week to have it installed. I should have some feedback shortly and will keep you posted. 3 Quote Link to comment Share on other sites More sharing options...
pureguava Posted November 26, 2019 Author Report Share Posted November 26, 2019 Fantastic! Can't wait to hear what you think Quote Link to comment Share on other sites More sharing options...
ragingfool35 Posted November 27, 2019 Report Share Posted November 27, 2019 https://www.thelotusforums.com/forums/topic/69635-wc-engineering-ceramic-bearing-turbo/ i also made some comments regarding the stock ECU with my GT3071 here: https://www.thelotusforums.com/forums/topic/83569-rolling-road-leans-out-severely-at-4200rpm/?tab=comments#comment-659885 Quote chris90SEjust because I don't CARE doesn't mean I don't UNDERDSTAND Link to comment Share on other sites More sharing options...
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