Thread: GT3076R vs GT2871R..

I want to hear some opinions on these 2 turbos, say both turbos have the same size inlet, both are .86 on the turbine housing and both are T2 flanged.

The engine would be my stock ve that the 2871 is already on, using the exact same setup the 2871 is using: modded gtir mani for external wastegate, gtir j-pipe 3" dp an exhaust.

I don't really know a lot about turbos themselves so was just wondering about boost characteristics of the 3076 vs the current 2871, like would it lag more? as is boost comes in full around 4300+\-rpm. I'm not looking to run a ton of boost, prob 12-15psi maybe a tad more.. would the 2871 do better in this area or would the 3076 be ok with that boost level?


OOOOPS wrong section my bad, can someone move this to turbo please?
Like I said, I don't know much about how turbos work and all that so sorry if some of my questions sound dumb lol.

The 2871 is the better matched turbo. The 76mm 6 blade compressor sounds amazing though, and feels like you're going faster because of the aural experience.

Boost response is going in the 71s favor as well, but the 2871 is only marginally better. I believe the 2871r is too laggy for its size though, compared to other turbos available.

If the 30r is utilizing the full-size t30 turbine, it would probably be my choice. If it is clipped though like the gt2876r then I would pass. The 3076r is already mismatched enough without having a clipped turbine wheel to make things worse.

good info! to be clear its a precision turbo i believe, heres some info i found.

PTE's Direct Replacement Performance Upgrade Turbochargers feature the following:
• Exclusive CEA (Competition Engineered Aerodynamics) compressor wheel machined from a 2618-aluminum forging
• Liquid-cooled, dual ceramic ball-bearing center housing rotating assembly (CHRA)
• Higher efficiency and faster transient response for maximum power and performance
• 58mm inducer compressor wheel
• Compressor cover options:
- "B" compressor cover 2.8" inlet/2.0" outlet
- "E" compressor cover 3.0" inlet/2.0" outlet
- "Ported S" compressor cover 4.0" inlet/2.5" outlet
• 56.5mm, 84 trim turbine wheel
• Turbine housing options:
- T25 .64, .86 A/R wastegated

im going with the 3076 t2 the only downfall i have read is the t2 housing might be a little restrictive for the ve. however the ve output is significant enough to spool it at a decent rpm and reach peak boost at a well deserved time all and all i chose the 3076

2871 > 3076r all day.... Now a 3071r is a different story.

3071 got my vote.....@ **Bar

be aware they charge a extra 75.00 for the t2 housing on this turbo. This is basically the same turbo I have sitting on my table minus the billet compressor wheel. I have the t2 3071r on my car now. The 3071r will do 400whp @ 15psi with the external gate setup and the 56.5 wheel. The 3076r would be 20-30whp more at the same boost level. Not sure about the pte turbo because all the dynos I have seen were at 28psi.

I ran an external gate setup on my 3076r and I didn't break 400whp until about 18psi. If you can nail 400whp on a smaller turbo, then that's great.

The T2 housing shows the .86 flowing more than a T3 .82 with the clipped turbine. Exhaust flow is what you need on the VE imho.

On my VE it took about 24psi boost to hit 450whp on the GT3076r. Granted, I experimented a lot with divided housings/twin scroll. These housings flow significantly less than an open housing, but offer really good response. Ultimately, on the ve, it is not worth it. The .82 T3 is the best housing. Keeping the T2 should be interesting. The 3076r has a large compressor compared to its turbine, so I would keep the exhaust flowing well. Choking the exhaust will just cause surge issues anyway.

Turbo section question? hmmmmmmmmmmm hehe

Yeah I looked at your charts for comparison to mine. They are very similar I was just making the same power(+/- 10whp) at 2-3psi less.