Pt6266
#33
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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.
Just because it comes out of a pump doesn't make it fall under "pump gas". It's an alternate fuel.
#36
F'n Newbie...
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*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!"
#38
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We know that Precision's billet 62mm compressor has much higher peak flow than Garrett's 62mm cast wheel. But we also know that Precision units are producing about the same or less power at "normal" boost levels as comparable Garrett units, what indicates, that efficiency at lower flow rates and pressure ratios is probably lower.
IIRC smg944 posted very interesting numbers. When he started tuning his billet 6765, at lower boost levels, he was producing less power for given manifold absolute pressure than with standard GT35R 1.06 A/R. But then he realized massive power gains at higher boost levels even with marginal increase in pressure.
So far, you didn't mentioned any intended power or boost levels so its impossible to make any judgement about what would be superior for intended use.
IIRC smg944 posted very interesting numbers. When he started tuning his billet 6765, at lower boost levels, he was producing less power for given manifold absolute pressure than with standard GT35R 1.06 A/R. But then he realized massive power gains at higher boost levels even with marginal increase in pressure.
So far, you didn't mentioned any intended power or boost levels so its impossible to make any judgement about what would be superior for intended use.
#40
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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.
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.
#41
Just in time to die
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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.
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.
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~
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.
Originally Posted by tetsurobash
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.
The newer turbine wheels are not billet wheels they are still a cast wheel just newer aero.
~S~
#45
Just in time to die
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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~
~S~
Last edited by Zero R; 02-19-13 at 01:58 PM.
#46
RIP User Name** FD3S4LIFE
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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~
~S~
Last edited by Zero R; 02-19-13 at 01:59 PM.
#48
Just in time to die
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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~
~S~
#50
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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.