4g61t.org

I would suspect that the rod ratios of the 1.6L would be better for elevated RPM's for extended periods, but the 2.0L still held it's ground in competition nonetheless.
Contact "dragstr4g61t" with the PM function, see what he has to say on this subject. His stock bottom end 4g61t just broke the 10's in the 1/4.
Enjoy your stay, and let us know what you end up doing with your build, assuming you aren't giving away too many hints to the competition.

I will have to do a little machining to the block mainly the deck will need some removed about 4 mm it seems
as I have a 1.8 hyundai engine use the head off that it has 1.6 cast in it so it should be a small chamber

Flying Eagle wrote:
I need to update the listings that are posted above, as there are lots of changes that have recently, well in the last few months, come to light.

All 4g61t's that came to north america are small port heads from what our members have seen and used. Adding a 4g67 head setup, which was delivered to motor in JDM land and NZ/AUS is the only ways to get big ports from the factory.

What I need to know is when the big intake port and small exhaust port showed up, and when the defining time period was for finding large port intake/exhaust 4g67 heads versus the stop date for small port intake/exhaust 4g61t style heads as to how they were delivered on 4g61t motors over here (NZ/AUS). Was the facelift time period the defining time for most to find that they had 1.6T DOHC large port in/out setups from the factory?

ticklenut wrote:
I believe the head change occurred in 90 or 91, as far as I know no 61t's were delivered to AUS and all 4g61's delivered were post 90 and therefore the large port or 18 head. I have a 61t with the small port head and a 61 NA which has the larger ports. Just holding on to the NA head for future plans . The 61t is an 88-90 engine personal import.

mrcyborg wrote:
have a NA61 engine with the the stamped as a "16" and it surely has big intake ports, i sold the intake manifold to a dude that used it on a vr4 head in place of a dual runner.

You would need a 4g67 (1.8L Hyundai head) with the 1.8L stamped on the side. Just make sure you are getting large inlets and large outlets that are roughly 2.0L 4g63 sized. There are some heads that are small inlet (1.6L sizing) and large outlet (2.0L sizing). It would seem that some of the Aus and or NZ stuff suffers from these hybrid part issues.


If you are not a member there yet, sign up and also check out the NZ board run by Jarred "GSRWRC":

http://4g61nz.co.nz/