Hi everybody, Im new here and I have a couple of questions about turbo kits for evo8.
Im looking into turbo kits, eigher greddy 20g or hks 2835
i know HKS is more expensive and its a ball bearing turbo.
Does this really justify the price $5000 and more?
Or should I just buy Greddy TD-06S.
If anyone here has one of those kits, please share your opinion.
Thanks
Im looking into turbo kits, eigher greddy 20g or hks 2835
i know HKS is more expensive and its a ball bearing turbo.
Does this really justify the price $5000 and more?
Or should I just buy Greddy TD-06S.
If anyone here has one of those kits, please share your opinion.
Thanks
Evolving Member
I don't think youll find to many people running aftermarket turbo setups yet. The stock turbo is pretty badass on its own. There are evos in the 11's on stock turbos now. I think its still pretty early in the game to be running a custome turbo setup.
If there is someone I'd be interested in seeing pics and a nice write up, along with time slips.
Jeff
If there is someone I'd be interested in seeing pics and a nice write up, along with time slips.
Jeff
Evolved Member
ive seen a black evo w/ HKS everything in cnclued the HKS big turbo!
Evolving Member
25g is bigger and supports up to 500hp, but its getting expensive, you will need to change connecting rods and pistons and not too many people want to spend that much.
go with 20g you wont be sorry and it makes more then enought power at least for me it would
go with 20g you wont be sorry and it makes more then enought power at least for me it would
Evolved Member
with the 20g you would still get much more lag than the 16g now.... but how much?
-shahul
-shahul
Evolved Member
I was looking into getting a 20G myself. Another question on that... would a 20g bolt right in with out the need of other parts? Or do you need to upgrade everything like the HKS kit?
Newbie
I have owned the Greddy TD06-20g, the T67-25g and the HKS 3037s turbo with 0.87 A/R.
The Greddy turbos are awful. The manifold in the kit is ok, but the wastegate diaphragms do not last a long time at high boost. Note that these are actually the same as Audi wastegates, which means a much cheaper replacement part than Greddy.
The TD06-20g is much laggier than the stock TD05-16g, depsite having a smaller exhaust housing at 8cm2. The reason is that the stock Evo turbo has an effective variable turnine nozzle thanks to it;s twin scroll design. The 20g doesn't. It does flow 20% more than the 16g, so you can get bigger power without uprating internals. A 20g at 1.4 bar makes as much power as a 16g at 1.7 bar. 450bhp is the most you can expect from a 20g, but these turbos don;t like high boost - so 1.8 is as high as you can go at peak power, and 2 bar at peak torque. Recommend for all aftermarket turbos that you change your oil feed to come from the block, not the head.
Both the 20g and 25g are only oil cooled with thrust bearings, so are very sensitive to oil cleanliness and pressure.
The 25g is really not very good at all. It has the same turbine side as the 20g (although you can get a larger 10cm2 exhaust housing). It flows about 50% more than the stock turbo, but is EXTREMELY laggy. The 20g generates full boost about 4400rpm, whereas a 20g is more like 5000rpm or higher depending on your engine and exhaust housing size. Also, the stock bearing cannot really cope with more than 1.6 bar, yet strangely the turbo does not come alive until ABOVE 1.6 bar. You can get an uprated 360 thrust bearing from Essex turbos in the UK. With that you can 2 bar midrange, and 1.8 bar top end max. Both turbos suffer from alot of exhaust back pressure thanks to the restrictive turbines. Max you can expect with a 2 litre engine and pump fuel is 500bhp without overspeeding the turbo.
The 3037s is lovely. Really a work of art. The exhaust manifold and wastegate and much better quality than the Greddy equivalents, and much better designed. The Garret originated 3037s is beautiful, with twin compresser entry, ball bearing core and a good sized exhaust housing. THe compressor is the biggest GT30 compressor that Garret make, and is capable of 500bhp on paper.
On my engine it produces 512bhp with 98 octane unleaded at continuous 2 bar, with close to 600bhp on race fuel, all at a heady 7600rpm. Spool up is fantastic, with torque around 450bhp at 4200rpm. The kit features proper reintroduction of the external wastegate, which the Greddy does not - you have to do that yourself. On an engine with a lower compression ratio (mine is 8.92:1) you could get over 500lb/ft of torque.
Having sampled all of them ,the HKS kit is definitely worth the money and far superior to the Greddy kit.
You also have far more options for turbo size and exhaust housings than the Greddy.
BTW, these power figures are engine dyno measured, not rolling road measured, so are very accurate.
To recap, the least laggy is the 3037s, and also the most powerful. Most laggy is the 25g, and second most powerfule.
Least powerful, but second in the lag stakes is the 20g.
Now, you can modify the 20g to fit a garret ball bearing core, and a T04E compressor wheel (like the Frankenstein mods). This works ok and can produce 25g like performance with much better spool up, not as good as the 3037s, but not bad. Thing is, this mod costs as much as the difference for a 3037s.
So just buy the 3037s and be VERY happy!
Hope this helps.
The Greddy turbos are awful. The manifold in the kit is ok, but the wastegate diaphragms do not last a long time at high boost. Note that these are actually the same as Audi wastegates, which means a much cheaper replacement part than Greddy.
The TD06-20g is much laggier than the stock TD05-16g, depsite having a smaller exhaust housing at 8cm2. The reason is that the stock Evo turbo has an effective variable turnine nozzle thanks to it;s twin scroll design. The 20g doesn't. It does flow 20% more than the 16g, so you can get bigger power without uprating internals. A 20g at 1.4 bar makes as much power as a 16g at 1.7 bar. 450bhp is the most you can expect from a 20g, but these turbos don;t like high boost - so 1.8 is as high as you can go at peak power, and 2 bar at peak torque. Recommend for all aftermarket turbos that you change your oil feed to come from the block, not the head.
Both the 20g and 25g are only oil cooled with thrust bearings, so are very sensitive to oil cleanliness and pressure.
The 25g is really not very good at all. It has the same turbine side as the 20g (although you can get a larger 10cm2 exhaust housing). It flows about 50% more than the stock turbo, but is EXTREMELY laggy. The 20g generates full boost about 4400rpm, whereas a 20g is more like 5000rpm or higher depending on your engine and exhaust housing size. Also, the stock bearing cannot really cope with more than 1.6 bar, yet strangely the turbo does not come alive until ABOVE 1.6 bar. You can get an uprated 360 thrust bearing from Essex turbos in the UK. With that you can 2 bar midrange, and 1.8 bar top end max. Both turbos suffer from alot of exhaust back pressure thanks to the restrictive turbines. Max you can expect with a 2 litre engine and pump fuel is 500bhp without overspeeding the turbo.
The 3037s is lovely. Really a work of art. The exhaust manifold and wastegate and much better quality than the Greddy equivalents, and much better designed. The Garret originated 3037s is beautiful, with twin compresser entry, ball bearing core and a good sized exhaust housing. THe compressor is the biggest GT30 compressor that Garret make, and is capable of 500bhp on paper.
On my engine it produces 512bhp with 98 octane unleaded at continuous 2 bar, with close to 600bhp on race fuel, all at a heady 7600rpm. Spool up is fantastic, with torque around 450bhp at 4200rpm. The kit features proper reintroduction of the external wastegate, which the Greddy does not - you have to do that yourself. On an engine with a lower compression ratio (mine is 8.92:1) you could get over 500lb/ft of torque.
Having sampled all of them ,the HKS kit is definitely worth the money and far superior to the Greddy kit.
You also have far more options for turbo size and exhaust housings than the Greddy.
BTW, these power figures are engine dyno measured, not rolling road measured, so are very accurate.
To recap, the least laggy is the 3037s, and also the most powerful. Most laggy is the 25g, and second most powerfule.
Least powerful, but second in the lag stakes is the 20g.
Now, you can modify the 20g to fit a garret ball bearing core, and a T04E compressor wheel (like the Frankenstein mods). This works ok and can produce 25g like performance with much better spool up, not as good as the 3037s, but not bad. Thing is, this mod costs as much as the difference for a 3037s.
So just buy the 3037s and be VERY happy!
Hope this helps.
Evolved Member
Go HKS 2835 or 3037. I can also get you great deals on either. And oh yeah, WELCOME ABOARD !
Evolving Member
drc do you sell those turbo kits, i cant find them on your website
i might be interested in hks 2835, let me know how much they are
i might be interested in hks 2835, let me know how much they are
Newbie
The 2835 is a great little turbo. Good for low end response, and ok for about 450bhp/450lbft, but you have to run it very hard (over 2 bar) for that, so turbo life is somewhat compromised.
Forget the 3037, go for the 3037s.
Depending on power output:-
0.64ish A/R - ok for about 440bhp
0.72ish A/R - ok for about 475bhp
0.87 A/R - ok for 500bhp
1.1 A/R - This is just too big really, unless you want good hp at over 8000rpm
Sorry, couldn't exactly remember all the A/R sizes!
Lag on the 0.64ish A/R will be similar to standard, 0.72ish not bad, 0.87ish quite a bit worse, and 1.1 A/R worse than a 25g!
Forget the 3037, go for the 3037s.
Depending on power output:-
0.64ish A/R - ok for about 440bhp
0.72ish A/R - ok for about 475bhp
0.87 A/R - ok for 500bhp
1.1 A/R - This is just too big really, unless you want good hp at over 8000rpm
Sorry, couldn't exactly remember all the A/R sizes!
Lag on the 0.64ish A/R will be similar to standard, 0.72ish not bad, 0.87ish quite a bit worse, and 1.1 A/R worse than a 25g!
Evolved Member
HKS doesn't make a 2835 kit for the Evo. Go 3037 kit !! I have quoted a few guys here on that kit at a GREAT price shipped !! I also match ANYONE's price , as long as it's legit .....