TZ 5 port with poor low end ??
 

I have a TZ 5 port and compared to the 3 port, it does not have as much punch at the low end. Is this normal? I like the top end when it goes into 2nd gear, but the first gear seems sluggish.

Is this the engine setting or property of a 5 port?

clutch spring needs more tension
or
lean the low end, or is it already as lean as you can go?
or
run a longer manifold, what pipe/mani are you running?

normally 3-port have more low-end grunt while 5-port have the edge on top end...
what pipe are you using? pipe plays huge on throttle response ... you might wanna try different pipes also... check-out O.S. Speed T-1040 pipe made for the TZ series engines

I ran with a 6mm pipe. I will try the 5mm this weekend as well as a harder clutch spring. Will report back how it goes.

The 5 port was a little disappointing for now but the pipe and clutch as you suggested will help.

ur clutch spring needs more tension!

Do you mean change to a stiffer spring, or tighten down the screw nut further?

Thanks mate.

tighten the clutch spring nut: if you measure from the top of the threads on the crank to the clutch spring nut and it was, say, .6mm make it .7mm.

take out the removable venturi, anyway you have a 5 port, that will make it scream also

u can change to a stiffer spring if ur current one is those that is really soft till u need to tighten the screw a lot!...

U might also want to change to a harder clutch shoe to prevent clutch slip

Btw i have no problem with the tz 5 port with 6.5 venturi using skyline or JPL or RB 6mm pipes.... the engine is very fast, high torque, easy to tune and have gd temp. :p:p:p

I changed to a harder spring and it fixed it. Now it is FAST!

Cheers.

:batman::batman::batman:

The TZ doesn't like to be ran with a soft clutch setup so I noticed when I got my slightly modded .12 3 port. I personally run the Mike Swauger setup with the clutch weights drilled out with a 3.5mm drill bit. It made it run like a whole new motor and the thought of purchasing a new engine was non existent.