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Rb20Det

david69

By david69,
in Engines & Forced Induction

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david69 Community Regular

david69

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Hey all.rb20det got mines computer,r33 series 1 turbo,rb25 afm,3 inch exhaust fmic,boost at 13.5 psi gtr 32 fuel pump wired for 13.8 volts.my question is can i update the ceramic wheel to steel and wind on some more boost and will my injectors keep up or am i better off getting another turbo if so what type,,,im a bit over lag but i love the hit up high..are forward plenums a waste of time for a rb20..thanks in advance..

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kitto Mentor

kitto

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No you cannot just shove another turbo on and wind up the boost.

1. Get rid of the MINES computer

2. Get a Nistune

3. Then do a turbo, injectors, Z32 AFM upgrade

4. Forward facing plenum gives almost next to no performance benefits if any. Some say they lose power and torque. Make your engine bay look better yes.

5. Skids

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B-rice Mentor

B-rice

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Forward facing plenums do give some perfomance advantages, you reduce the heat generated at the top of the engine bay due to the intake intercooler pipe.Also shorter pipes means its a bit more responsive since it doesnt have to bend and travel twice as much just to get into the cooler. id agree with everything else kitto has told you.

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david69 Community Regular

david69

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what exactly is a nistune and who can do it around the blacktown area.nsw. do i need to pull my mines out and put the stocker back in and will it still run.dont know too much about the history of the car...

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kitto Mentor

kitto

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she runs really well atm.bit of lag,have a manaual boost controller under the bonnet was wondering how it would go if i screwed the boost up maybe to 15psi...?

Nistune. Your at risk destroying your engine as it is. Just because it runs 'well' doesn't mean the AFR's are in check.

MINES computers are known to not have good tunes in them to suit Australian conditions.

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kitto Mentor

kitto

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how much do i need to spend to get a reliable afr meter and what brand?

Just get a tune dude. Nistune and get rid of the MINES computer!

An AFR gauge is not going to help you at all, none, zip, nudda. Factory 02 sensors are narrow band. If you hook up an AFR gauge to it is going to give you nothing but false readings all day every day.

The only way to have some what of an accurate AFR gauge is to use a complete wide band setup.

But thats besides the point. You need to ditch the MINES ecu and get a re-mappable ECU and then have it tuned.

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R31Nismoid Grand Master

R31Nismoid

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Yep - searching always helps :)

Forward facing plenums do give some perfomance advantages, you reduce the heat generated at the top of the engine bay due to the intake intercooler pipe.

You'll find that @ 7000rpm and the airflow going on - that really is not a major factor in a road car when using its performance.

Peak hour traffic, yes, but performance has no place there.

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