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6266 vs 6466

Old 09-27-2018, 06:34 PM
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Default 6266 vs 6466

Stock internals aiming for 450 on 93 and 600s on E85

is 6466 overkill? or should I just get the 6266
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Old 09-28-2018, 07:24 PM
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Originally Posted by ap1s2k13 View Post
Stock internals aiming for 450 on 93 and 600s on E85

is 6466 overkill? or should I just get the 6266
Either one IMO would be fine and they both spool up similar. The 6466 wouldn't have to work as hard to make the power and would be easier for life on the turbo. You could have more room to grow with it also in the future. With that said, I have a brand new 6466 for sale that is still in the plastic that I am selling only because I'm switching to the 6870 for bigger power goals. I'm selling it cheaper than you can get it anywhere else. Let me know.
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Old 10-08-2018, 06:48 PM
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6266 works great i just did one, had 400hp @9psi
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Old 10-08-2018, 08:09 PM
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Those turbos are way to big for those goals. Lots of unnecessary lag For those goals I would go with a billet wheel 58mm turbo or smaller. Maybe even a gen 2 Garrett gtx3071r, which is rated for 650hp and is only a 54mm turbo. Should spool amazing.

with my old gen 1 gtx3576r turbo which is a 58mm turbo I made 450 on 91 octane and 620whp on E85. The new gen 2 turbo are rated for much more power and you can downsize the turbo and get faster spool and make the same power.

with those 64mm+ turbos your talking about a really laggy setup. Like 6k+ until it spools. Unless your building a 800+whp drag car I don’t see the point of dealing with such a poor power band.
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Old 10-09-2018, 04:29 AM
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Originally Posted by riceball777 View Post
Those turbos are way to big for those goals. Lots of unnecessary lag For those goals I would go with a billet wheel 58mm turbo or smaller. Maybe even a gen 2 Garrett gtx3071r, which is rated for 650hp and is only a 54mm turbo. Should spool amazing.

with my old gen 1 gtx3576r turbo which is a 58mm turbo I made 450 on 91 octane and 620whp on E85. The new gen 2 turbo are rated for much more power and you can downsize the turbo and get faster spool and make the same power.

with those 64mm+ turbos your talking about a really laggy setup. Like 6k+ until it spools. Unless your building a 800+whp drag car I don’t see the point of dealing with such a poor power band.
Lol. K. 460lb ft at 5500...



You have to ask yourself if you really even need/want a turbo to spool at 2-3k RPM. Are you going to be racing it there? What is the purpose of the car you are building? If it's just straight line stuff there isn't any need to have a turbo spooling super soon and then being taxed in the higher RPM situations.

I would go with a 6266 in your case. Should be able to make and hold peak power the entire operating range you are going to be using it in (assuming straight line oriented goals). The yellow torque line you see there is my stock engine setup on a 6466, notice it makes peak torque from 5k-9k, pretty ideal!

Last edited by hatrickstu; 10-09-2018 at 04:34 AM.
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Old 10-09-2018, 01:17 PM
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Originally Posted by hatrickstu View Post
Lol. K. 460lb ft at 5500...



You have to ask yourself if you really even need/want a turbo to spool at 2-3k RPM. Are you going to be racing it there? What is the purpose of the car you are building? If it's just straight line stuff there isn't any need to have a turbo spooling super soon and then being taxed in the higher RPM situations.

I would go with a 6266 in your case. Should be able to make and hold peak power the entire operating range you are going to be using it in (assuming straight line oriented goals). The yellow torque line you see there is my stock engine setup on a 6466, notice it makes peak torque from 5k-9k, pretty ideal!
OP didn't say what he was doing with the car but 95% of the people here are not making all out race cars. and damn near 99% of people always go stupid big on the turbo because "the internet said so" I started with a 6062 shooting for 500hp...fking horrible choice.
I switched to a BW 257sxe which cost 1/3 of that precision and it makes the same power...just WAYYY sooner. It can full spool by 3k and makes the car one hell of a daily driver.
I've since moved onto a garrett. but anyway, yeah...a 6466 is a big ass turbo for 600hp.
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Old 10-09-2018, 02:09 PM
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Originally Posted by Charper732 View Post
OP didn't say what he was doing with the car but 95% of the people here are not making all out race cars. and damn near 99% of people always go stupid big on the turbo because "the internet said so" I started with a 6062 shooting for 500hp...fking horrible choice.
I switched to a BW 257sxe which cost 1/3 of that precision and it makes the same power...just WAYYY sooner. It can full spool by 3k and makes the car one hell of a daily driver.
I've since moved onto a garrett. but anyway, yeah...a 6466 is a big ass turbo for 600hp.
As I said, I would do the 6266... I also made no mention of building a race car. I simply pointed out that having peak torque across the RPM range at which you are looking for peak torque makes the most sense. Why in the world do you need full spool by 3k RPM? Just pick the right gear...
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Old 10-09-2018, 02:31 PM
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I have had all different turbos and you really want the smallest turbo for the hp goal. A 600whp 58mm turbo will have a way better power band and way better drivability for daily driving and it will also be faster than 600whp on a 62mm or 64mm turbo.

this is like comparing a 400whp turbo s2000 that hits full boost by 4500rpm compared to a 400whp centrifugal supercharged s2000 that hits full boost at redline 9k rpm. The turbo s2000 will just have way more power everywhere in the power and and thus will be a faster car. If you don’t like the low end power with the turbo you can always delay spool with the wastegate through the boost solenoid.
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Old 10-09-2018, 02:34 PM
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Originally Posted by hatrickstu View Post
As I said, I would do the 6266... I also made no mention of building a race car. I simply pointed out that having peak torque across the RPM range at which you are looking for peak torque makes the most sense. Why in the world do you need full spool by 3k RPM? Just pick the right gear...
because it's awesome? not having torque til 6k is not fun....just like your graph shows. I guess "fun" is subjective, but ill take my torque off the line every time over a sloth. If I want that kinda powerband I'd rather ride a two stroke dirtbike... I've let quite a few ppl drive my car and they all come back saying they want to go to a more responsive turbo.
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Old 10-09-2018, 05:31 PM
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Originally Posted by hatrickstu View Post
Lol. K. 460lb ft at 5500...



You have to ask yourself if you really even need/want a turbo to spool at 2-3k RPM. Are you going to be racing it there? What is the purpose of the car you are building? If it's just straight line stuff there isn't any need to have a turbo spooling super soon and then being taxed in the higher RPM situations.

I would go with a 6266 in your case. Should be able to make and hold peak power the entire operating range you are going to be using it in (assuming straight line oriented goals). The yellow torque line you see there is my stock engine setup on a 6466, notice it makes peak torque from 5k-9k, pretty ideal!
What housing where you on with the 6466? I had thought about just keeping mine and upping it to the open .96 AR but I would still think it will cap out in the low 900 whp range and I'd like to get closer to 1000 whp. The reason on going with the 6870. What are your thoughts? Don't mean to thread jack, just asking to get an opinion.
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