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Choices For Turbos Which Is Best?

yoshiii335

By yoshiii335,
in Engines & Forced Induction

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hypergear Grand Master

hypergear

Posted
Posted

To the engine

That should be 240rwkws, our billet ATR43ss15 will do the job nicely. You can check out my thread or site under ATR28, the G2 and SS15 SR20det result should be very close to the RB20det in terms of response.

yoshiii335 Rising Star

yoshiii335

Posted
  • Author
Posted

Start reading books before you start anything. If you don't understand basic engine combustion principles then you'll kill the car

I read up more on engine combustion and engines with turbos. I understand the basic principle, iginition, timing,fuel, air. I also read how the manufactorers tune cars from the factory to try to stay as close to the 14.7.1 air/fuel ratio settings to keep the car from running rich or lean.

Is this one of the values that a tuner tries to keep when tuning a car?

Do you know where I can get good imformation about what values I need to look for when tuning?

GTSBoy Grand Master

GTSBoy

Posted
Posted

14.7 will cause engine explosion under load. Ona turbo you will need to be richer than 12:1. 14.7 will only work at low loads and cruise.

It is a big subject. There is plenty of info out there on how to tune, but if you are that much of a novice, do not even consider trying to tune your car until you have been around tuning and tuners and done a lot of reading and so on and so forth for quite a long time.

Dose Pipe Sutututu Grand Master

Dose Pipe Sutututu

Posted
Posted

Even so under 12:1 isn't the magic number.. some motors like richer AFRs at max VE to keep knock levels down and then AFRs can even lean out to 12.5 AFR as load drops.

Not to mention richer AFRs will promote more torque where as leaner AFRs will promote more power... but say you're running low timing at peak torque you also want richer AFRs to keep things cooler on the exhaust side.

I really really suggest you pay a tuner to tune your car before you lunch a motor.

yoshiii335 Rising Star

yoshiii335

Posted
  • Author
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14.7 will cause engine explosion under load. Ona turbo you will need to be richer than 12:1. 14.7 will only work at low loads and cruise.

It is a big subject. There is plenty of info out there on how to tune, but if you are that much of a novice, do not even consider trying to tune your car until you have been around tuning and tuners and done a lot of reading and so on and so forth for quite a long time.

ok

yoshiii335 Rising Star

yoshiii335

Posted
  • Author
Posted

Even so under 12:1 isn't the magic number.. some motors like richer AFRs at max VE to keep knock levels down and then AFRs can even lean out to 12.5 AFR as load drops.

Not to mention richer AFRs will promote more torque where as leaner AFRs will promote more power... but say you're running low timing at peak torque you also want richer AFRs to keep things cooler on the exhaust side.

I really really suggest you pay a tuner to tune your car before you lunch a motor.

ok

Dose Pipe Sutututu Grand Master

Dose Pipe Sutututu

Posted
Posted

Good starting point on AFRs.. short and sweet article.. please note this applies to gasoline only.. if you try and use those AFRs with E85 you might end up misfiring

http://tunertools.com/articles/AFR-Tuning.asp

I'm still pretty new to E85 and only tuned 2x so far, however I find E85 likes to be leaner rather than richer.. I tend to get phantom knock & misfires as the AFRs drop.

yoshiii335 Rising Star

yoshiii335

Posted
  • Author
Posted

Good starting point on AFRs.. short and sweet article.. please note this applies to gasoline only.. if you try and use those AFRs with E85 you might end up misfiring

http://tunertools.com/articles/AFR-Tuning.asp

I'm still pretty new to E85 and only tuned 2x so far, however I find E85 likes to be leaner rather than richer.. I tend to get phantom knock & misfires as the AFRs drop.

Thank you

yoshiii335 Rising Star

yoshiii335

Posted
  • Author
Posted

Rb20dets are similar to a S13 SR20det. The ideal turbine will be some thing off a .64 rear. Which our ATR43SS1 and 1.5 are made very specifically for Rb20det that has the OEM bolton pattern.

Which would be better, this or your high flow service?

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