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Underbody braces, turbos and more!

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PostPosted: Sun Sep 20, 2009 8:38 am 
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Location: Trinidad, West Indies
I've been using the SuzukiRD.com underdrive pulley since April when I rebuilt, and I haven't had any issues. I know of another guy using an aluminum flywheel & underdrive pulley, and he isn't having any issues either. :huh:

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PostPosted: Sun Sep 20, 2009 10:53 am 
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Location: Winnipeg
Crankshaft issues arise at certain RPM ranges. If you drive your car on the street at 1000-3500 RPM most times, the crankshaft may never reach the same sort of destructive harmonic that may occure at 6000 for example. What i like about fluid dampers, is they are effective at dampening a lot of forces at all RPM's


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PostPosted: Sun Sep 20, 2009 2:02 pm 
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Location: San Juan, Argentina
turbohull wrote:
cultus engines came with no balancer


AFAIK, the cultus engine has the same crankshaft pulley as the swift GTi, so.. it should have a balancer built in.

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PostPosted: Sun Sep 20, 2009 2:28 pm 
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Location: Linköping
I was going trough all my old parts today, and I did actually find a pulley that doesent seem to have a built in balancer.. I will bring my camera to let you see..


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PostPosted: Sun Sep 20, 2009 7:26 pm 
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Location: Sherbrooke, Québec
I do have an aluminum flywheel, and never had any loose bolts or anything.But I kept the stock crankshaft pulley because the aftermarket ones don't have a damper.I don't know about you, but me, I don't want to take a chance.

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Last edited by kram on Mon Sep 21, 2009 7:37 am, edited 1 time in total.

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PostPosted: Mon Sep 21, 2009 6:02 am 
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Location: San Juan, Argentina
The larger the power/torque figure, the higher the magnitude of the crankshaft vibration.

A stock engine will likely be fine with an underdrive pulley without a damper, and it might only be noticeable after many kilometers when the engine components might show some stress.

But a turbo engine has 2x, 3x, or even 4x larger crankshaft angular flexion due to its stronger power stroke. This will lead to very strong vibrations that will lead to nothing but increased stress of the engine components (ie. pulleys, bearings, rods, bolts, T-belt, crankshaft, etc)

Again, this is the most serious project i've ever seen on Teamswift. I wouldn't risk such a great development without a proper crankshaft damper.

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PostPosted: Tue Sep 22, 2009 3:05 pm 
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PostPosted: Wed Sep 23, 2009 8:11 am 
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Location: Trinidad, West Indies
^^^so much power even the bonnet couldn't stay on!! =)

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PostPosted: Fri Sep 25, 2009 8:37 am 
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Location: Barbados
runbag wrote:
I was going trough all my old parts today, and I did actually find a pulley that doesent seem to have a built in balancer.. I will bring my camera to let you see..


I have been racing G13B motors for years....YEARS now and have never seen a crankshaft pulley with a balancer. I guess it depends on the region. Nonetheless, you might have simple just over torque to bolts. The reinforced plate would help, but just ensure that the torque specs are not exceded, torque the bolt in opposing sequence and use RED loctite on the bolts.

There are many many schools of though with regards to harmonics vibrations... however, this gremlin is practically absence in a 4 inline motor like ours - especially if the assembly is balanced. Question for Caaarlo: Is there a harmonic balancer in on the clutch cover, disc & gearbox?[hmmm]


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PostPosted: Sat Sep 26, 2009 11:35 am 
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No there isn't. The only damper is in the pulley.

Don't forget one thing is the reciprocating and rotational mass balance, and a very different thing is the crankshaft torsional resonance, which has nothing to do with R.R.M. balance.

The crankshaft / flywheel assembly is a resonant system like a spring-mass system.... In which the crankshaft acts like a spring (torsional spring) and the flywheel acts as the mass (rotational inertia). It has a characteristic resonant frequency and if a damper isn't used, it will lead to... well, you know. So, a perfectly balanced crankshaft/piston/rod/flywheel assembly will still have a characteristic torsional vibration, which is damped by a harmonic balancer.

It vibrates quite like a torsion pendulum. A damper or balancer would be something like submerging the pendulum in viscous oil.


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PostPosted: Sat Sep 26, 2009 9:42 pm 
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Location: Winnipeg
Caaarlo wrote:
No there isn't. The only damper is in the pulley.

Don't forget one thing is the reciprocating and rotational mass balance, and a very different thing is the crankshaft torsional resonance, which has nothing to do with R.R.M. balance.

The crankshaft / flywheel assembly is a resonant system like a spring-mass system.... In which the crankshaft acts like a spring (torsional spring) and the flywheel acts as the mass (rotational inertia). It has a characteristic resonant frequency and if a damper isn't used, it will lead to... well, you know. So, a perfectly balanced crankshaft/piston/rod/flywheel assembly will still have a characteristic torsional vibration, which is damped by a harmonic balancer.

It vibrates quite like a torsion pendulum. A damper or balancer would be something like submerging the pendulum in viscous oil.



Very good description !


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PostPosted: Sun Sep 27, 2009 1:21 pm 
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Location: Vancouver Island, Canada
This has to be the single most beautiful car I have ever seen. Truly inspirational. In complete and total awe!!!!!!

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PostPosted: Thu Oct 01, 2009 9:44 am 
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ahh runbad, i have but 1 problem. u only post 1 pic, outside of that i think u've outdone urself. the colour scheme again looks great, and i can only imagine how good it feels driving it. max bigups, u a di boss!
please to install an in car camera or multiple cameras so i can see the footwork and the rpm clock as u tearing up the track. bless.

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wish i had a car like runbag, wonder if he would help me build 1?


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PostPosted: Thu Oct 01, 2009 2:58 pm 
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congrats on getting everything together. hope you have your problem fixed. car looks great.

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PostPosted: Wed Oct 07, 2009 10:09 am 
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Location: Durham, UK
Hi,

Mk1 ph1 came with solid pulley unlike mk2 Gti's with rubber ring inside pulley.
Mk1 ph2 came with it but you will only find ph2 in JDM.

I think Suzuki themselves found out so many issues with mk1 egnines.
They changed cam belt width, internal port design with cylinder head, cold start waxostat valve, built in dumper pulley and bigger capacity injectors.

How did you make rear wheel arches by the way? Is it steel or GRP?

Cheers
Atchi


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PostPosted: Wed Oct 14, 2009 1:04 pm 
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OMG it's up and running :) a new SSGTI god has rizen LOL
Good job man nothing but respect i hope u enjoy the car and let us see many movies and actions pics of it.

Are you going to build something else now or just drive the shit out of this one untill you crash ;)

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PostPosted: Sun Nov 01, 2009 12:10 am 
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Location: Trinidad W.I.
well any updates runbag???? :mrgreen:


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PostPosted: Sun Nov 01, 2009 12:59 pm 
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Location: Linköping
Well, the repair after the incident took some time, but now it's up and running again :) I even drove the car through the city from the workshop back to my garage, what a feeling!!

Now I'm spending my time to get all things ready that needs to be done before the registration process starts. It's not much really, but since the winter is long, I have no hurry.

aRandy: I'm going to drive the shit out of the car for sure, but hopefully not as far that a crash should be involved ;)
Should I start with a new project? I really don't know what I want to do, but I'm pretty sure that I will start up with something that could be done at the same time I take care of my Swift ;)


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PostPosted: Sun Nov 01, 2009 5:23 pm 
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Location: Norway
You should do another swift. At least a Suzuki!

Good luck with the registration. Here in Norway its a bitch to get anything opproved. espessialy on a Suzuki!


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PostPosted: Fri Nov 06, 2009 7:56 pm 
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runbag wrote:
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YES! Amazing job :)

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PostPosted: Sat Nov 07, 2009 10:05 am 
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Location: Trinidad, West Indies
I have linked this build to a local forum here in Trindad 8)

Trinituner Forum

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PostPosted: Sat Nov 07, 2009 5:20 pm 
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:thumb2: great job :thumbsup:

build the same car a few more times in other collors and create a new race serie. i will take one ;)

have :jerkit: fun :jerkit: with that beast you deserve it!

by

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PostPosted: Sun Dec 20, 2009 10:56 am 
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Well done runbag, fantastic job.

As for a new project, what about a mk2 gti 8)

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PostPosted: Sat Feb 13, 2010 4:31 pm 
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Sad but True...

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Location: Saskatchewan
wow

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PostPosted: Sat Feb 27, 2010 11:29 am 
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Any Updates?


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