N1 SCREAMER

BUILD­ING A HONDA CUP B16A N1 EN­GINE

NZ Performance Car - - CONTENTS - WORDS AND PHO­TOS: MAR­CUS GIB­SON

Now in its 10th sea­son, Mo­tul Honda Cup is a su­per com­pet­i­tive cham­pi­onship here in New Zealand; one that never fails to pro­vide close-quar­ters rac­ing. As the years have pro­gressed, so have the cars, and, inevitably, there’s been a cor­re­spond­ing bump in the in­vest­ment re­quired to be at the pointy end of the field — a fact that did not sit well with the or­ga­niz­ers.

Sure, su­per-fast big-bud­get Hon­das are great to watch, but things were get­ting too far from what the class had set out to achieve. This saw the in­clu­sion of an N1-spec class this sea­son — es­sen­tially, a pro­duc­tion-based class like those run in Ja­pan, with EG and EK Civics and DC2 In­te­gras go­ing head to head with near-stock en­gines.

Build­ing one should leave you change from $10K, which is some­thing that had us ex­cited. While you could slap in a junk­yard mo­tor, avail­able for a few hun­dred, if you’re out to win — and Jacky Tse and his crew at Jtune crew def­i­nitely are — you may want to re­con­sider. The crew has ear­marked an old Honda Cup Civic for the class. The N1 class reg­u­la­tions state that the cars must run either a B16A or B16B 1600cc. But, if you do elect to go Type R B16B, you are hit with a weight penalty of 60kg. While this might not sound much to some, run­ning this amount of ballast would greatly af­fect lap times. How­ever, the rules don’t say that you can’t swap the B16B valve train into a B16A. This gives you a few ben­e­fits, such as the much larger lift/ du­ra­tion cams, and dou­ble valve springs that of­fer bet­ter valve con­trol at high rpm.

The en­gine is a true junk­yard dog, be­gin­ning with a $50 long block, an old junk head, and used Type R cams scored off the net. When it’s all said and done, the to­tal in­vest­ment has been un­der $2K, and that in­cludes us­ing all-new seals, pistons, valve springs, pumps, and bear­ings from Honda.

Newspapers in English

Newspapers from New Zealand

© PressReader. All rights reserved.