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Old 05-13-2008, 09:41 AM   #1
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Default 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?
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Old 05-13-2008, 12:14 PM   #2
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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?
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Old 05-13-2008, 12:30 PM   #3
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Quote:
Originally Posted by bboy View Post
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?
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
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Old 05-14-2008, 07:28 AM   #4
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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.
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Old 05-14-2008, 08:18 AM   #5
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ur clutch spring needs more tension!
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Old 05-16-2008, 09:13 AM   #6
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Do you mean change to a stiffer spring, or tighten down the screw nut further?

Thanks mate.
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Old 05-16-2008, 10:49 AM   #7
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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.
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Old 05-16-2008, 11:05 AM   #8
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Quote:
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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.

take out the removable venturi, anyway you have a 5 port, that will make it scream also
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Old 05-17-2008, 06:44 AM   #9
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Quote:
Originally Posted by bboy View Post
Do you mean change to a stiffer spring, or tighten down the screw nut further?

Thanks mate.
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.
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Old 05-17-2008, 11:50 AM   #10
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I changed to a harder spring and it fixed it. Now it is FAST!

Cheers.

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Old 05-17-2008, 07:17 PM   #11
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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.
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