Getting Reversion With Greddy Y Pipe On Rb26 Single Turbo

[ck_chino]

hey as the title says, as I anm coming to a stop and press the clutch in or rev the engine and as it idles down it wants to stall. for the record I have recirculating oem bovs. the car is stock, the engine is stock. just put on this greddy single turbo kit and it starts to stall. I question the maf because prior me getting the greddy y pipe inlet, I had made a temporary dual maf adaptor out of plastic and the car ran fine with no stall etc. however as soon as I put the greddy unit on I started seeing such symptoms. swapped the temporary plastic one I made and no problems. I can only guess the recirc portion of the pipe is at a bad angle on the greddy unit. but has anyone else had this issue? My turbo inlet is 3" and I used a 3" to 4" silicone coupler, would that step make an issue for maf reversion?

thanks guys

[Frosty]

Have not heard of that before. I was under the assumption that the Y pipe was designed for exactly that reason and was pretty good at it. Have you check for leaks or anything like that getting in between the MAFs and flanges etc?

[ck_chino]

yes man all triple checked. only 3 couplers 2 on the mafs and 1 for the turbo inlet itself all checked with no leaks etc.

[Frosty]

so the car is stock apart from a single turbo conversion? have you had the car tuned since the conversion? what ecu?

[ck_chino]

no tune since conversion just completed installed a couple weeks back ecu is factory oem hitachi unit. Just dont understand as to why my temporary plastic unit worked fine and this greddy unit is giving me problems.

[Frosty]

this is a recipe for disaster mate tbh. Big turbo needs things to complement it...I suggest you chat to your tuner/workshop for next steps as i can see this going pop in the near future