possibility of spooling

[bad V6]

I am trying to decide on a new turbo. So far I have gotten it narrowed down to a billet 6765E w/ .85 exhaust housing. Where I am undecided is journal bearing or ball bearing. Can anyone give me some insight as to which direction to go with the combination in my sig?

Thanks,
Pat

 

[JT'sV6]

I think dbb would be a good idea. Dont know much about the spool responce of that particular turbo, but the specs and a/r you listed should put that turbos spool later in the rpm than your current turbo. The dbb should help it spool quicker than the jb.

On the plus side, form your sig, your engine sounds like it flows pretty well, so that should help a bit.

 

[bad V6]

I'm leaning towards the journal bearing version. Spooling a little slower than the 6152 would be fine, as it spins up too fast with this engine and converter. I am hoping to get away from the backpressure issue that I currently have.

 

[GNVYUS 1]

I have the 61/52S (61/62) and to go to a turbo that's like a 72/76 in a .85 housing is not going to spool even similar FWIW.

I'd consider BB and the .63 housing, you're probably not going to spin 6k+ and run over 30psi so the .85 isn't going to be as much of a benefit if you're concerned with spool up. If you want it to spool even better, get a 4 bolt exhaust header setup, get the T4 twin scroll housing and the Quick Spool Valve and you'll have the best of both worlds, but it's going to cost you.

If you don't plan on running 9's than maybe look at the Billet 64/65 from PTE instead since spool is a factor for you.

BTW, you planned out a new fuel system?

And what's the 0psi stall on the Precision?

 

[bison]

Journal 65 trim needs 3200@zero boost/vacuum with a .63 to work well. The ball bearing could use about 300rpm less at zero boost/vacuum.How fast have you gone with the 6152? The 6152 will run mid 120's before it hits backpressure.

 

[bad V6]

Thanks for helping me figure out which direction I need to go. With the current setup @ 0 boost the engine is at 2500 RPM. The 6152 has propelled the 3650# car to 10.73 @ 125 at 22-23# of boost. I ran into an issue the last few times at the track unable to get the boost turned up higher than 23#.

I may switch converters sometime in the future, however would like to try and run the Vigilante if able, I know that it's not as efficient as others. I don't think that I would like to go with a higher stall as I do drive it on the street to area events.

I am going to stay with the 3 bolt headers. The fuel system is going to be reworked as well, 80# injectors and still undecided on the pump, waiting to see how the newer intank pumps perform or go with a double pumper. I would like for the car to be capable of high 9's when finished.

Bison, have you done any testing of the billet 6765 series turbos? Can you suggest whether I should go journal or ball bearing?

 

[its2qik]

Thanks for helping me figure out which direction I need to go. With the current setup @ 0 boost the engine is at 2500 RPM. The 6152 has propelled the 3650# car to 10.73 @ 125 at 22-23# of boost. I ran into an issue the last few times at the track unable to get the boost turned up higher than 23#.

I may switch converters sometime in the future, however would like to try and run the Vigilante if able, I know that it's not as efficient as others. I don't think that I would like to go with a higher stall as I do drive it on the street to area events.

I am going to stay with the 3 bolt headers. The fuel system is going to be reworked as well, 80# injectors and still undecided on the pump, waiting to see how the newer intank pumps perform or go with a double pumper. I would like for the car to be capable of high 9's when finished.

Bison, have you done any testing of the billet 6765 series turbos? Can you suggest whether I should go journal or ball bearing?

That 6765 would be a killer turbo on your combo. Personally, I wouldn't hesitate running it one bit. I have a Mitsubishi Evo, and I know several guys who are using that turbo on their 4-cylinder cars and it works well. You ought to be able to spool it much quicker than they are able to do especially in a 3-bolt configuration.

 

[bad V6]

I've been doing some thinking, and this may be my best option. If I were to go with the journal bearing billet 6765E w/ .85 exhaust housing, which converter would you recommend, a PTC N/L?

 

[bison]

I've been doing some thinking, and this may be my best option. If I were to go with the journal bearing billet 6765E w/ .85 exhaust housing, which converter would you recommend, a PTC N/L?

I'd go with a ptc 9.5. The car will pick up considerably in the eighth. I'd stop keep a .63 ex unless you are going to push it to 135+

 

[bad V6]

I bolted up the journal bearing billet 6765E w/.85 exhaust housing yesterday. On the street it spools almost as fast as the GT6152E did, can't wait to make a few passes at the track. But I've got to address some fuel issues before a problem arises. This turbo should be all that I'll need in this car.