GTX3071R vs. GTX2867R - opinions needed
Dec 8, 2013, 02:53 PM
#1
GTX3071R vs. GTX2867R - opinions needed
Motor is 2.4L 4G69 MIVEC
I'm torn between these two. The GTX3071R is a higher horsepower turbo than the GTX2867R, but for my horsepower goal, both are capable. I'm told the GTX2867R works fantastic with 2.0L, but for a 2.4L build, it's recommended to up the exhaust to 0.86 AR - which is diverting from the GTX2867's ideal 0.64 AR, effectively lowering its performance capabilities. The GTX3071 and GT3076R are both known to work better with a 2.4L build but are maybe a bit overkill for my build? (horsepower goal 350whp on FWD)
The GTX28 is also an internal wastegate design so I'd have to have the flapper screwed open or welded to accommodate the external wastegate design i'm after.
Which turbo is the best choice for the 2.4L 4G69?
I'm torn between these two. The GTX3071R is a higher horsepower turbo than the GTX2867R, but for my horsepower goal, both are capable. I'm told the GTX2867R works fantastic with 2.0L, but for a 2.4L build, it's recommended to up the exhaust to 0.86 AR - which is diverting from the GTX2867's ideal 0.64 AR, effectively lowering its performance capabilities. The GTX3071 and GT3076R are both known to work better with a 2.4L build but are maybe a bit overkill for my build? (horsepower goal 350whp on FWD)
The GTX28 is also an internal wastegate design so I'd have to have the flapper screwed open or welded to accommodate the external wastegate design i'm after.
Which turbo is the best choice for the 2.4L 4G69?
Dec 8, 2013, 02:59 PM
#2
I would ask the Evo owners. Most turbo ralliarts are running an 16g turbo. You are unlikely to get any real world experience from anyone.
On the other hand Cranswick is all knowing when it comes to turbos so I would rank his suggestion the highest.
On the other hand Cranswick is all knowing when it comes to turbos so I would rank his suggestion the highest.
Dec 8, 2013, 04:14 PM
#3
Lol, I don't know whether to be grateful for offended...
I'm no expert by any means, but I will offer my opinion.I personally would go with the 2867...it won't make as much power as the 30r's but it's all relative...are these 2.0 motors they works great on running 35psi and revving to 9000rpm? for low boost (6-16psi) the 2876 will do just fine, and it will spool much quicker...it really depends on what you want to do with the car...if your building it for primarily drag racing, go with a 30r with a larger A/R...if you want it to be peppy in the lower rpm ranges and build boost fast, then go with a 28r, with the largest exhaust A/R you can get. I wouldn't want anything that didn't hit full boost after 3,200. but that's just me.
example
if a 30r can make 450hp at such and such rpm, on whatever motor, which so much boost...(see where I'm going?) it may make that power at higher boost and higher rpm than you intend to run.
Dec 12, 2013, 10:25 AM
#7
If you do decide to do the GTX2867R I have A TIAL0.86 housing here that's vband in/out and does not have the internal wastegate. It was too laggy for my 2l subaru but as I told you would be more appropriate for your 2.4l. I still stand by my recommended GT/GTX30 choice.
-Michael
-Michael
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Dec 12, 2013, 11:02 AM
#8
If you do decide to do the GTX2867R I have A TIAL0.86 housing here that's vband in/out and does not have the internal wastegate. It was too laggy for my 2l subaru but as I told you would be more appropriate for your 2.4l. I still stand by my recommended GT/GTX30 choice.
-Michael
-Michael
I think the GTX30 is the best bet, I agree. I am doing an AWD swap now on my vehicle (i purchased a wrecked 2006 outlander 5spd awd) so the higher horsepower GT/GTX30 isn't as overkill as it may have been previously when the intention was boosting with FWD...
Dec 12, 2013, 11:05 AM
#9
If you do decide to do the GTX2867R I have A TIAL0.86 housing here that's vband in/out and does not have the internal wastegate. It was too laggy for my 2l subaru but as I told you would be more appropriate for your 2.4l. I still stand by my recommended GT/GTX30 choice.
-Michael
-Michael
Mike doesn't like small turbos
he's always giving me ****...but I like quick spooling.
Dec 12, 2013, 12:06 PM
#10
I know this is off topic. but it seemed like a decent place to ask. How do you think the Evo VIII 16G with a 10.5 hotside will react on our engine? I originally got it for the Eclipse but Im working on getting an exhaust manifold setup to use it on the RA now.
Dec 12, 2013, 01:16 PM
#11
I'm running a standard DSM big 16g...would love to have an Evo III 16g. the 16g's are a bit on the small side, but I really like the quick spool...the Evo 8/9 16g's are twin scroll (hence the larger inlet) that will help with spooling...on a budget the 16g's work fine with this motor.
Last edited by CrAnSwIcK; Dec 12, 2013 at 01:23 PM.
Dec 27, 2013, 11:36 PM
#15
that's pretty good...how many miles on it? I paid $200 for my big 16g had maybe 10k km on it, and it came with an actuator, spare hotside, and a spare 14b center section w/ compressor. then I sold the 14b as a complete unit for $100 (new actuators on ebay worth about $50, and the hotside was a freebie) so I really paid $100.lol
next I may even try the Evo 3 GT knock off...RRM's been using it for years...and all their failures are tuning related
next I may even try the Evo 3 GT knock off...RRM's been using it for years...and all their failures are tuning related
Last edited by CrAnSwIcK; Dec 28, 2013 at 12:06 AM.
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