Jump to content
SAU Community

Recommended Posts

You can run whatever turbo you want...whether its useable or not is another matter, as said above have a look at the TD-06SL2-20G if you want a good top end rush but still be useable. if if you want response the HKS2530..or even a GT-RS would be a good in betweener.

  • Replies 66
  • Created
  • Last Reply

Top Posters In This Topic

Im running a gt2860r (disco potato) on my rb20 and im getting 200rwkw with full boost (16psi) at 3500rpm. Imo its a great street setup, it's very fun to drive and can give some higher horsepower cars a run for there money.

Im running a gt2860r (disco potato) on my rb20 and im getting 200rwkw with full boost (16psi) at 3500rpm. Imo its a great street setup, it's very fun to drive and can give some higher horsepower cars a run for there money.

gt2860 is .86 turbine and .60 a/r???

gt35 .63 and .70 a/r.

why wouldnt it spool untill 5k??

gt2860 is .86 turbine and .60 a/r???

gt35 .63 and .70 a/r.

why wouldnt it spool untill 5k??

You have a lot to learn my friend :)

the A/R is just that, an Area Ratio...means nothing when comparing differnt turbos..only relevance it has is when comparing different hosuings of the same type of turbo, eg GT3582R has 3 turbine options, .63, .82 and 1.06

Have a look at a GT35 and a GT28 side by side.

You will see why there will be a difference in response

Once you start getting past 220-230 rwkw with a rb20 you'll get nothing but lag, the best turbos out there ie least amount of lag for a 20 will get you 230 rwkw max...

I'm sunning a standard turbo highflowed and have 219 rwkw and its not to laggy, still more then standard of course but no where near as bad as say a 33 highflow. I make full boost by around 4-4.5k, i personally think around 210-230 is perfect for a 20.:thumbsup:

A TD06-20G hits 20psi before 4,500rpm. And at 5,000rpm is making something like 210rwkws on its way o 260rwkws! So its all in the tune and setup.

med_gallery_462_50_59282.jpg

I made some mods with a different gate, manifold and now a plasmaman plenum and have lost response :( I did gain a tad in the top end but no very happy with the result. So stick with the std inlet manifold if you want better response and torque.

med_gallery_462_50_44142.jpg

A GT-RS on std manifold is laggier then a full TD06-20G setup, with gate and manifold. Years ago I backed to backed my car on a dyno with a friends GTS-4 in rwd which ran a similar exhaust, same intercooler and both std RB20. Though I had cam gears he didnt. So a GT-RS isnt a good in betweener with regards to performance, it performs worse then a 20G from both response and grunt. But if you need a std manifold low mount turbo then its a good solution, but performance is compromised.

med_gallery_462_50_8431.jpg

As you can see my 20G was running more boost but you can see the boost response is about the same, but the 20G actually make spower sooner

med_gallery_462_50_171164.jpg

I'm sunning a standard turbo highflowed and have 219 rwkw and its not to laggy, still more then standard of course but no where near as bad as say a 33 highflow. I make full boost by around 4-4.5k, i personally think around

full boost at 4-4,500rpm on a standard high flow seems realy laggy, my 25/35 is on full boost before then

Boost response is very similar as you can see. With cam gears boost curve could be a little bit better. But the amount of flow and actual torque and response is superior with the 20G over the GT-RS. With cam gears then perhaps the GT-RS may have similar actual hp and torque curves. The catch of course is that whilst the cars were on teh same dyno within minutes of one another....the cars had different tuners. I went on to make a further 25rwkws and a tad more response by leaning on the tune after the dyno comparison and that subsequent tune still was perfectly reliable. So nothing to suggest that the 20G tune at the time of the comparison was a lot more aggressive as I later found out with a re-tune it was actually pretty conservative

As you can see my 20G was running more boost but you can see the boost response is about the same, but the 20G actually make spower sooner

med_gallery_462_50_171164.jpg

The GT-RS has failing boost control though Bris!

Its very lazy onto boost and then takes the entire rev range to increase from 17psi to 19psi.

If it has better boost control i think the results would be much closer with 19psi in around 1800rpm sooner than it was.

Still the TD06 does win out, not arguing that... I just think the GT-RS looks like a very bad loser when if the setup was better it wouldn't be too bad at all. If you added in cam gear and maybe picked up another 200rpm it could be very interesting.

TD06 will make more peak power either way though.

I run an 8cm housing (posted above)

This is an earlier tune when i was running the 10cm housing and pretty conservative tune

462Dyno5.jpg

The 8cm is clearlt the better option

Ash, no doubt if both our cars ran ebcs rather then just bleeds on std wastegates both could be improved, especially the GT-RS. But the shape of them ramping onto boost is the main thing I look at rather then whether they taper off at set boost pressure due to a bit of diaphragm creep

That's what im talking about though man.

The boost ramp on the GT-RS is terrible, and it's due to the control setup, not the turbo.

TD06 ramps up nice and sharp yes, the GT-RS is just lazy from 4200-5000 where it should hit firm @ 4200 based on how the ramp starts. It's definately blowing the gate open or a lazy actuator

Still good info though either way i just don't agree with the comment "GT-RS isn't a good inbetweener", I'd say it is - if the setup is... actually... setup correcrtly. :)

Still the TD04 is better, but more costly for the whole kit IIRC?

That's what im talking about though man.

The boost ramp on the GT-RS is terrible, and it's due to the control setup, not the turbo.

TD06 ramps up nice and sharp yes, the GT-RS is just lazy from 4200-5000 where it should hit firm @ 4200 based on how the ramp starts. It's definately blowing the gate open or a lazy actuator

Still good info though either way i just don't agree with the comment "GT-RS isn't a good inbetweener", I'd say it is - if the setup is... actually... setup correcrtly. :)

Still the TD04 is better, but more costly for the whole kit IIRC?

I am only really compairing them between 3,000rpm and 4,000rpm to get a good feel for how they ramp on. When we compared the two setups it was a very early tune of mine. Actually its the 234rwkw tune below. The 260kw tune also showed before is the exact same setup, only with 100rom shell fuel. The 100tune mostly helped with the ability to run a little more boos and a touch more ignition safely at the track.

98 safe tune

Dyno_RacePace.jpeg

100 track tune

med_gallery_462_50_59282.jpg

The 100ron track tune above still has 4 deg igntion taken out of what we can get out of it

BUT, this is getting a little off thread... Based on what swirto has posted I would be throwing a 3071 on the car. No lil RB20 is every going to pull in the 3,000rpm range. A short stroke 2L six needs revs to come on to cam and fill its lungs. Drivign a 2530 pwered RB20 vs a TD06 RB20 isnt all that different from seat of pants. The 2530 is a little nicer through the early 3,000rpm range but the 20G does not lose out by so much that the lag loses you a lot of general performance.

So i think a 3071 is a good balance (based on your mods)between between being small enough for response and drvability bit size to spin and give you a good hit of 250rwkws up top

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now



  • Similar Content

  • Latest Posts

    • Oh and my rear arms may need some attention too.    
    • Bushings are almost done. Check the date stamp 😂 these are likely the original bushings with 27 years and 243ks on them.     Was too dark to get a pic of the worst one.
    • Porous blocks are a known issue on something like a Porsche M96, it's not really something I've ever heard of on an RB26. It's possible what people thought was a "porous block" was really a cracked block that they just didn't spot the crack on.
    • This is a controversial subject really, the whole power vs fun thing I mean And this is the main reason I got back into a MX5 Of the last few notable daily cars I've owned whilst I have frequented SAU R33 GTS-t: fun, but because I'm a idiot I modified well past a reliable fun car and ended up hating it, although that was my fault because I tried to have a daily cruiser and race car all in one, the family called it the sometimes car, because sometimes it was working, sometimes it was broken, gladly sold it NB MX5: brilliant car, thrashed the Bejebus out of it, but, again, was stupid and deleted the air con, power steering and stripped the interior out, whilst still fun, and reliable, and super cheap on consumables, it was not a fun place to be going on long cruises, I did love it, but basically every family member hated going anywhere in it, sadly sold it 2015 WRX STI: soulless thing that looked like your average Kia sedan and had that horrible boxer engine with glass ringlands, the family did like it though, that thing was one of my stupidest purchases and I still regret it 2017 Toyota 86: 😪 if I didn't crash it, I would probably still have it, it was a fun little thing, even with that horrible boxer engine, the family did like it, the only reason I didn't get another 86, or, BRZ was the boxer engine, I should have learnt after owning the STI, but I'm a idiot VX SS: great cruiser, fits the whole family, and was fast as.....in a straight line, but a big fat thing, so no enjoyment throwing it around corners, the family was unimpressed with the whole boganness of if, but they did admit it was a comfy place to sit on long cruises As for the NC, I feel it is perfect for what I want, or need out of of a car, whether I'm cruising the Hwy, back roads, twisties or peak hour traffic, the Mrs doesn't mind driving it either, or cruising in it as well, although she does bump her head of the roof nearly every time she gets in, which is farking hilarious, and the kids love taking it for a thrash as well So basically, I've had constantly more fun, and way less headache and heartache, both on the track and on the street, in low powered cars,  go figure.....LOL One thing though, the Mrs has stated that the cams have made the exhaust sound much louder, which they have, but it doesn't bother me, in fact, I actually like it, but, to negate any future comments from the Minister for War and Finances I may look at some changes to the rear muffler set-up to drop the volume down a tad to appease her when we are out and about in it
    • You will need to extend the turbo inlet pipe somehow, which could/might be done with silicone/rubber pipe, but might need steelwork, depending on your intake. And you will need to change the pipework on the outlet in teh same way, but this is more likely to need steelwork.
×
×
  • Create New...