NZ Performance Car - - Build -

f you’re head­ing to the drag strip this com­ing sum­mer, you’ll want to pack some decent ear plugs, as Aaron Keech is set to storm the strip in his lat­est RX-3 build. This time, he has ditched the boost in favour of an all-mo­tor 20B pe­riph­eral port (PP)–pow­ered RX-3 coupe; and you can rest as­sured that it will be low and loud. With no boost on tap, and only a lim­ited amount of power-mak­ing abil­ity from the nat­u­rally as­pi­rated (NA) three-ro­tor, a big fo­cus has been on keeping weight to a min­i­mum, sav­ing grams wher­ever pos­si­ble — the shell is cur­rently un­der­go­ing some ex­ten­sive chas­sis work at Auck­land-based SMS Fab­ri­ca­tion with this in mind.

The front chas­sis rails re­main, al­though, from the fire­wall back, it’s all new steel work, in­clud­ing a nine-sec­ond-spec roll cage and new rear clip for the four-linked nine-inch, with mod­u­lar al­loy Strange head and axles. The brake pack­age is a Wil­wood Dy­nalite drag set-up, and the front arms have been cus­tom-made at SMS Fab­ri­ca­tion, again to save weight.

The en­gine is a Mi­croTech-con­trolled Cur­ran Broth­ers Rac­ing (CBR) short-crank 20B PP that will see revs singing out at well above 10,000rpm. Brent has also built an al­loy in­take man­i­fold with in­ter­nal bell­mouthed plenum and 125mm Pro-Jay throt­tle body. The head­ers are equal length and as short as pos­si­ble, with a mega­phone ex­haust ob­nox­iously pok­ing through the front guard. With no muf­flers and the ex­pected rpm, it’s cer­tainly go­ing to be the type of sym­phony we can’t wait to lis­ten to dur­ing the burnout. As it’s purely 0–400m fo­cused, a small front-mounted fuel tank will feed the methanol to the six in­jec­tors, keeping plumb­ing to the bare min­i­mum and as sim­ple as pos­si­ble.

A G-Force five-speed with an SDP Per­for­mance steel bell-hous­ing and Di­rect Clutch bil­let will al­low Aaron to pluck gears while keeping the 20B up in the rev range. The goal with the build is the New Zealand NA ro­tary record by dip­ping into the sin­gle dig­its and, all go­ing to plan, end­ing up on the world’s top-10-fastest 20B list as the ic­ing on the cake. Work is pro­gress­ing at pace, and Aaron is plan­ning to have the car out this com­ing sea­son, all go­ing well.

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