IHADAV8.com - Turbo Buick Tech, and Nonsense
Tech Area => General Buick Tech => Topic started by: Forzfed on October 26 2016, 05:30:09 PM
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Does anyone know the difference between the PTE6466 compared to the Turbonetics 6466 or 6468? I thought the wheels were basically the same but differences in housing? :hmm Is the PTE worth the extra cost over the Turbonetics?
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Well, I bought the Turbonetics 6468. Looking forward to seeing what it will do! I was thinking 6465 but the motor breathes really good and Jack suggested the 6468 would be better. :cool;
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The 6466 is a legitimate 9 second turbo with matching mods and tuning. With it only being available in a DBB version, I passed on it. The cost was prohibitive. There was little track data for me to go on as well, as most haven't got the balls to max a turbo out.
Jack's been a Turbonetics dealer for years, and knows his shit. The 6468 is likely in the same ballpark as the 6466. Turbonetics turbos, from the reading I did on them years ago weren't a true DBB. One side was a BB...and the other was journal. As to their durability, if Jack is still selling them, then that should be a hint.
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I thought the new ones were a true double ball bearing? I know the old CPT-66 I had wasn't. I will have to ask Jack about that. Regardless, I've had no trouble with my old Turbonetics. So I figure if it works, what the hell. Jack said the 6468 is a 9 second turbo. I guess we will see when I put it on how it performs!
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I know of 2 different Jack's that will recommend turbonetic products over Precision. Both will tell you that you're paying for a name on the precision. I don't know enough to tell you anything. That being said, I do have a Precision on my car. Sometimes buying second hand means getting cool guy parts at a discount
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The PTE 6466 was my original thought but Turbonetics has a superior warranty and from what I hear they are identical wheels with the exception of the housing. And the Turbonetics isn't as expensive. All bonuses!
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https://boostedforums.net/showthread.php?1605-Precision-Turbo-Bought-Out-By
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Jack's been a Turbonetics dealer for years, and knows his shit. The 6468 is likely in the same ballpark as the 6466. Turbonetics turbos, from the reading I did on them years ago weren't a true DBB. One side was a BB...and the other was journal. As to their durability, if Jack is still selling them, then that should be a hint.
I talked to Jack and you are correct the hot side is still journal. He said they found that the ball bearings would coke up and fail much easier on the hot side. I haven't had any issues with the CPT-66.
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Jack's been a Turbonetics dealer for years, and knows his shit. The 6468 is likely in the same ballpark as the 6466. Turbonetics turbos, from the reading I did on them years ago weren't a true DBB. One side was a BB...and the other was journal. As to their durability, if Jack is still selling them, then that should be a hint.
I talked to Jack and you are correct the hot side is still journal. He said they found that the ball bearings would coke up and fail much easier on the hot side. I haven't had any issues with the CPT-66.
Is the 6468 larger than the cpt66? sounds smaller to me but I wonder with all these designations
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It has the new billet compressor and inconel wheel. It should produce more power than the old 66.
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thanks!
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And it has an anti-surge housing but not like the fancy round ports the PTE has.
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I have a 66 that I bought from Jeremy years ago. the first thing I noticed is that it did not surge like the turbo that was on the car. It was almost undrivable.
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Steve I think yours is a 66/65 with the F1 turbine.
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Thanks ☺️
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Going to pick up my new turbo in a couple of days. It has a .82 exhaust housing, I was contemplating putting a .63 A/R on. What do you guys think? I will have more compression in my motor but it will probably take a bit more to spool. Thoughts?
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One of the guys on the other board had a PTC race convertor spec'd at 3400 for the stall for the 6466 Precision...an d I ASSUME it had the .63 housing on it. Most don't dial in low gear tuning...so they immediately go for a looser convertor. What stall is your convertor?
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A little birdie told me one time that until I broke into the 108-112 mph in the 1/8, there was no reason to put on an .82 housing. Said it would just make me slower. I have no data nor any links for reference to back that statement up
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An .82 is a big space to fill. You have to be moving a lot of air to use it effectively.
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I guess we should ask if the 63 you have is a garret or a precision. A 63 Garret will spool guicker than the precision 63. Torque converter selection is key for maximum return
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With the 224/224 and a 4.1 the motor moves a lot of air and can be choked by a crapping exhaust housing. One guy I spoke to that has a crazy fast GN told me in the 1/4 mile the exhaust housings don't make a difference they will run the same if you tune for them. I guess I can try it and see.
One of the guys on the other board had a PTC race convertor spec'd at 3400 for the stall for the 6466 Precision...an d I ASSUME it had the .63 housing on it. Most don't dial in low gear tuning...so they immediately go for a looser convertor. What stall is your convertor?
I have a 9/11 3200 stall.
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One guy?
I'd still stay with the smaller .63 and see where you are then move to the .82 and "tune for it" and see where that takes you. I know you know more than one person who put on a bigger turbo and It went slower.
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One guy?
I'd still stay with the smaller .63 and see where you are then move to the .82 and "tune for it" and see where that takes you. I know you know more than one person who put on a bigger turbo and It went slower.
One guy that no one has even come close to running what he has!
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You may have mentioned it and I forgot. 4.1 is out of my league. Good luck!
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I think the converter match will be the go/no go.
I have largely given up trying to figure out converters sitting on the shelf with a stall rating tag on them. They either work or they don't. :D I think a .63 gives you more leeway but we don't seem to have a lot of experience with .82s
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ignore me
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Thats a neat bug.
I'd think once you've maxed the turbo it's tapped out and done, time for a bigger turbine.
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One guy?
I'd still stay with the smaller .63 and see where you are then move to the .82 and "tune for it" and see where that takes you. I know you know more than one person who put on a bigger turbo and It went slower.
One guy that no one has even come close to running what he has!
So, we have "one guy" who runs way faster do I have that straight? I'm just some guy from the peanut gallery. Haven't even run a car at the strip in decades. Times change, and tech marches on. I just hate to see guys with the cool guy parts wondering what happened and why their car doesn't lay down a decent number.
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If the car will hit 4800 rpm when your foot comes off the brake at the line, then it will work.
If we are not careful, we get hung up on what worked yesterday and sometimes, we miss out on advances. Some times what failed yesterday was not due to the idea. It failed because of the implementation . Some one has to lead. And sometimes those that lead have to "try, try, try again" before they hit the lucky combination.
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I'd bet dollars to donuts it was Dusty that stalled the convertor for that 6466...so he'd be in the ballpark. With extra cubes, you MAY get away with an .82. My 1.5x launches have all come off at 49xx...so Steve is correct about the launch. Murph is around the same launch RPM for his maxing out a stock turbo thread. You'll have to see what the convertor 'flashes' to on launch for a given RPM. Norbs did some testing years ago and picked up 3 mph with an 82 over a 63 with a 109.
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I think the gain will be substantial if the turbo is pushed into the range where the back pressure shoots up on the smaller ratio turbo. It will probably be less obvious below this point.