Anyone running a GT3071R turbo?

[pureguava]

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  

 

[snowrx]

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. 

 

[cammmy]

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

[cammmy]

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

[MrDangerUS]

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

[snowrx]

Compressor maps not ID'd?

[cammmy]

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.

[ragingfool35]

Cam what was the boost at those HP numbers?  are you monitoring your fuel pressure at 90% duty?

[ramjet]

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. 

[cammmy]

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
.

[cammmy]

Here's the compressor map.

[jfitz981]

@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. 

[pureguava]

Fantastic!    Can't wait to hear what you think    

[ragingfool35]

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