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6266 vs 6466
Stock internals aiming for 450 on 93 and 600s on E85
is 6466 overkill? or should I just get the 6266 |
Originally Posted by ap1s2k13
(Post 24516312)
Stock internals aiming for 450 on 93 and 600s on E85
is 6466 overkill? or should I just get the 6266 |
6266 works great i just did one, had 400hp @9psi
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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. |
Originally Posted by riceball777
(Post 24519987)
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. https://cimg8.ibsrv.net/gimg/www.s2k...c17577feb8.jpg 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! |
Originally Posted by hatrickstu
(Post 24520056)
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! 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. |
Originally Posted by Charper732
(Post 24520317)
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. |
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. |
Originally Posted by hatrickstu
(Post 24520327)
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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Originally Posted by hatrickstu
(Post 24520056)
Lol. K. 460lb ft at 5500...
https://cimg8.ibsrv.net/gimg/www.s2k...c17577feb8.jpg 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! |
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