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RB20 turbo onto L20ET again

machg
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machg Enthusiast

machg

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Guys,

You know the hot air pipe that runs off the dump pipe up to the intake manifold just below the overboost valve on the L20ET? Will the engine still run OK if I blank off the intake side, as the RB dump pipe doesn't have a hole to let the hot air out?

Oh, by the way, this is a fairly straight foward conversion, but for a couple of niggly fit problems due to the proximity of the intake manifold on the L20ET engine, much thanks to David Griffiths Automotive, Moonah.

machg

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stagefumer11 Rising Star

stagefumer11

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Posted

that small pipe is only for the egr valve which is for emissions, unplug the egr unit, and block off the piping, and you will be sweet :)

good to see it went well im about to go and do it myself as my fatroy turbo is rooted. how much better does she go ?

and what was the minior problem in installing it ?

machg Enthusiast

machg

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that small pipe is only for the egr valve which is for emissions, unplug the egr unit, and block off the piping, and you will be sweet :D  

good to see it went well im about to go and do it myself as my fatroy turbo is rooted. how much better does she go ?  

and what was the minior problem in installing it ?

The gentle radius 90 degree bend attachment on compressor output side of the turbo fouls the intake manifold. I was very lucky, saw this coming and managed to find a different attachment that bolted on to the output side of the turbo. (thanks again to David Griffiths Automotive) She's not running yet, I've got to get two broken studs fixed before I bolt it all back together.

machg

  • 3 weeks later...
machg Enthusiast

machg

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G'day all,

Car is going, registered etc.

Performance wise, there doesn't seem to be much difference to the old turbo, maybe a little guicker getting onto boost, but as its running standard boost (hey, I guess the adapted wastgate actuator works!) goes the same as the old turbo, pretty much. Me thinks its time to wind up the boost a little. For on occasional fang on 95RON what would be a safe boost level? (still have the "overboost" failsafe fitted)

Thanks guys for all your help and advise,

machg

stagefumer11 Rising Star

stagefumer11

Posted
Posted

the design of the l20et head lets your run quite a high amount of boost, i was running 14psi with out a intercooler, and wasnt leaning out. and not pinging.

Id sit in 8-10psi, untill you intercool it, Also Rb20det injectors bolt right in and work fine, you need a bit of AFM adjustment tweeking tho. but is woth the extra fuel.

  • 3 weeks later...

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