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Title: 8l s3 1.8t with mamba turbo Post by: 6n2gti on April 08, 2025, 02:47:27 PM Hi Guys,
I own a 8l s3 1.8 20vt with build agu engine. I tried few setups on this car and current setup is with a mamba turbo(MAMBA GEN II G25 8+0 3" A/R.70 GTX2871R Ball Bearing Turbocharger). You don't see often mamba turbo, so I decided to share my experience and some logs of mamba turbo:) I think I use this turbo now for almost 1 year and still runs great, no oil leak or shaft play(pushed many times above 2+ bar).It is a nice upgrade turbo for gtx28 setups, as the turbine wheel has same size. I used this turbo first with a tial .63 a/r and now I am using it with tial .86 a/r housing. After the upgrade I noticed some drop in egt temp and little laggy on lower rpm(lag is rised by 500~rpm). You can see in the logs the difference between the 2 setups(dotted line is .63 ar housing). Car setup: - agu engine with 82.5mm bore - Ie rods+ je 82.5mm pistons(8.5 cr) - arp headbolts - agu head with custom adr(J) cams(less overlap) - rs4 exhaust valve springs - 980cc bosch injectors - rs4 maf sensor - 5120 hack - stock bam ecu with tune for ron 98 no meth - mamba turbo with external tial wastegate Video of mamba turbo with 0% wgdc and .63 a/r: https://youtube.com/shorts/dHGCeXkb7Gc?si=RgY51oerlg5KOU63 |