i also heard precision isnt using turbonetics parts anymore.. now they are using chinese parts..yikes...

 

^ where did you hear that from?

 

Probably from the same people who think rotas are held together with super glue. And for the record, there's nothing wrong with Chinese parts. You're using chinese **** all the time. People need to get over this **** that American made parts are inherently better.

 

never said it was a bad thing .. just stating what i heard .. no need to be defensive .. this is a public forum . public sharing of knowledge..

 

No one's defensive about anything. I was just making a point. You did in fact act like using chinese parts was bad with the statement "yikes."

 

E85 is pump gas.

 

how did i in fact say chinese parts r junk.. ? duhh

 

The gas station near my house doesn't have it, the gas station near my work doesn't have it, the gas station I randomly stop at on the highway might have it.

Just because it comes out of a pump doesn't make it fall under "pump gas". It's an alternate fuel.

 

Fair enough. So then does it qualify if the OP was from the midwest or southern states where its found everywhere?

I'm just busting your chops.

 

You sort of did imply it when you said yikes after saying Chinese parts. Yikes doesn't usually imply anything good about anything.

 

Yeah, I was on the fence about whether you were serious or not


Ehem... I beg the differ. Please see the below example:

*stares at hot 'rican in yoga pants*

"Mmm-Mmm-MM!! Would you look at dat ***? The things I would do... She'd hurt me. Yikes!"

 

Yes but Chinese auto parts and a bad *** boricua in yoga pants are two different types of yikes. But I got you, well played.

 

I am gunning for 360-380hp off the bat with stock ports. I'll port it when i have to rebuild it. I have absolutly no idea how much boost i would need to run to make that kind of power with either turbo. From your post sounds like there's more potential going with the 6266 billet. Im just wondering how much boost i can run safely. I guess I'll find out on dyno day.

 

Thank you. Jesus.

 

Potential doesn't mean that its well suited for your intentions. 6266 has enough compressor flow for over 600 HP. I'm not saying that its oversized, but for such power levels, you would be better with something smaller, like 5558 or 5862. Or traditional Garrett's T04E 57/60 trim.

You can run any boost level safely, its whole combination of tune, fuel properties, charge temperatures and possibly flow rate of internal coolants (WI) what matters. But your power levels should be reached at less than 15 psi.

 

If I had to choose between a 3574 and a 62/66 more often than not at this point I will choose the 62/66. This is for one simple reason, the 66mm turbine wheel is just a better turbine than the older P-trim type wheels from Garrett.
As for the "billet" compressor wheel not being needed at lower boost levels I would tend to agree, there is no need for a "billet" compressor wheel when compared to the 35R cast compressor wheel of the 3574 you wont net any real benefits, however the gain on the turbine wheel makes it worth it and you're not getting the 66mm turbine on a cast wheel.

You should be able to hit that power level around 14-16psi. I wouldn't run a smaller turbine wheel than a 62mm. I wouldn't run the 58mm compressor unless you only want 360-380whp on pump gas and are focused on response. If you plan to port the engine in the future forget it.

The newer turbine wheels are not billet wheels they are still a cast wheel just newer aero.

~S~

 

So which turbo is the winner?

 

Neither, both work well and both do good, on a well sorted car the 62/66 has a edge flow wise and a larger operating envelope. Response is pretty much identical and price is not a issue as both are pretty much identical there as well.

~S~

 

From what I've read/heard you get more bang out of the 6266 and if you were looking for big power then you should go 66. However, everyone has pointed me to the 35r originally. Only one person told me to look up the 66.

 

35R's are a good solid performer, they are limited in sizing options however when compared to similar turbo's, that said a 3574R is not a 35R. The 66mm turbine have shown as much as a 40hp improvement over the older P-trim wheels, personally I don't think for the lower boost levels most RX7 guys run you will see that large a jump (40hp) over the older P-trim. If you're choosing between the two your best bet for a larger overall performance envelope is going to be the newer 62/66.



~S~

 

Thanks Zero

 

Which has a quicker spool? I'm not going for extreme power so I don't care too much about max power output just yet. Shooting for about 380-440 on 91

 

Honestly they are very close to each other it wouldn't be a noticeable difference on a apples to apples comparison. In theory the the 62mm billet wheel is lighter and according to some people they noticed a difference when switching from the older 62/65 to a 62/66. I would assume it would translate even more so when going from the older P-trim to the 66mm but honestly you personally wont likely see anything noticeable as far as difference in response.

~S~

 

I've been running the 6265....it meets and exceeds all criteria. I've had it on the dyno and it did exactly as expected.

 

Sorry to bring an old thread back but im looking to make 400 on 15psi and maybe 500 on around 22-25psi. Im really looking at the 6266. Good choice? or should i go with something different.