Boost gauge and controller

[Austin Gillespie]

Hello, I'm looking to install a boost gauge (physical 1/8" tee type) and a mishimoto manual boost controller on my K6A cap, and trying to figure out which lines to tee into for those. Any help or diagrams would be greatly appreciated. Thanks!

[Ian Linden]

The boost guage is easy. Just tee-off the pipe to the IAC Valve from the inlet. See Page 6E-24 in the Service Manual- the uppermost pipe in the diagram. Also Page 6L-5, 2nd diagram.

The boost controller needs to go in the pipe from the turbo to the wastegate actuator. Access is unbelievably difficult, but can be done without removing the turbo - small hands with strong fingers needed. See Page 6L-6 top diagram.

Be aware that raising the boost will run you into fuel cut if you go too far. There are also other pitfalls - please read the Performance Enhancement section of the turbo article in the Cappuccino FAQ.

[Austin Gillespie]

I have a EA21r, do you know how that differs in process from the ea11 F6A?

[Ian Linden]

Sorry, I missed that you asked about the K6A.

For the boost controller, see fig 13 in the EA11R Parts Catalog - the short hose to the left of the clip (Part No 36), is where you have to insert the two hoses to connect to the controller. You could get a workshop to replace the hose with a long length, which you could cut when you get home to insert the controller. See fig 14 in the EA21R Parts Catalog - the corresponding hose connection looks to me to be Part No 2 on the inset diagram, but I'm not sure the best way to address that.

However, I'm not sure whether the N1 ECU is applicable to the K6A - the Suzuki Sport ECU Manual does not include the K6A, so maybe it is not applicable, and I can't help further there.

For the boost gauge, there looks to be a fair number of hose connections on the intake manifold to tee into (see Fig 9 of the K6A).