[JrZook]

2stroker wrote:

There is no range of jets available to suit the application and the overall venturi size is too large, unlike a Holley or webber you cant get venturi restrictors.

GSXR run BST34,36 or 38ss Mikuni carbs. Jets are pretty easy to get a hold off (ebay). They are CV style carbs (much the same as SU) which means they are a demand type carb and thus the venturi size remains variable depending on airflow and slide spring rate. Thus these style of carbs attempt to keep the air velocity high resulting in great response at any throttle opening as well as great fuel metering and atomization.

[missmyljdaze]

if you want a system that will work, be easy to look after and have set up, I would go for the single point injection the fellas are talking about.

if you want a system that looks fantastic and is the coolest sounding thing on the road- BUT-will make you think there is a hole in your fuel tank, be a paint in the bum to install and set up and probably send you troppo unless you really know what you are doing- go for webers, preferably multiple sidedraughts.

If you are smart- go for the injection.

having said that....

every time I hear a well tuned set of old school webers at full song - it tends to turn my brain to mush and the smarts leak out my ears

stephen.

[SuziBlu]

Spoke to TIGHE cams, getting a 1013C 22-7,000 revs, 30° more duration and a bit more lift.

IF I were going for injection, there is no way on earth I would put a very small Single point on, be hugely restrictive at upper end revs.

Fuel, who gives a shit about fuel consumption, if I was worried about that, id buy a skateboard, Multiple sidedraughts, mmmmmmmmm

[JrZook]

SuziBlu wrote:

Spoke to TIGHE cams, getting a 1013C 22-7,000 revs, 30° more duration and a bit more lift.

IF I were going for injection, there is no way on earth I would put a very small Single point on, be hugely restrictive at upper end revs.

Fuel, who gives a shit about fuel consumption, if I was worried about that, id buy a skateboard, Multiple sidedraughts, mmmmmmmmm

New or re-ground? What sorta $$?

[SuziBlu]

New, I cannot fathom how reground works, seems a furphy to me.


He has to grind it for me, I asked for a bit more lift than he has, and new springs, Bout $650 all up, Cams 450

[wolf_rt]

2stroker wrote:

If someone gets on here and has to ask what carbie may improve his cars performance then he is not going to gain anything by sending him off chasing what for him will be unatainable.

Fair enough, and a good point.

I just figured there wouldn't be much of a power gain to be had with different carbs (over a well tuned stock one) until you got to a tuned length single throat per port setup... (which a dual CV setup would be for all intents and purposes - on the right manifold)

I know the early harley carbs weren't CV's, and would no doubt suck... there are some exceptional after market replacement ones though like the Mikuni HSR two of these would be a wicked setup...

personally I would have thought 40mm side draft webbers or delortos, would be too big, and kill the bottom end...

But yeah... as you say... its a hell of a lot of work and $$$ to get it right, and injection would be easier (but not as cool)

[wolf_rt]

SuziBlu wrote:

New, I cannot fathom how reground works, seems a furphy to me.


He has to grind it for me, I asked for a bit more lift than he has, and new springs, Bout $650 all up, Cams 450

Give http://www.wadecams.com a ring.... they were far better on price and service when i was looking at a holden 6 cam.

[SuziBlu]

Webers use a "choke" this is to size down the throat to the venturi so as to keep bottom end working.

I do so like the setup, I agree that injection would prob be better, and cheaper, but, yum.

wolf_rt wrote:

2stroker wrote:

If someone gets on here and has to ask what carbie may improve his cars performance then he is not going to gain anything by sending him off chasing what for him will be unatainable.

Fair enough, and a good point.

I just figured there wouldn't be much of a power gain to be had with different carbs (over a well tuned stock one) until you got to a tuned length single throat per port setup... (which a dual CV setup would be for all intents and purposes - on the right manifold)

I know the early harley carbs weren't CV's, and would no doubt suck... there are some exceptional after market replacement ones though like the Mikuni HSR two of these would be a wicked setup...

personally I would have thought 40mm side draft webbers or delortos, would be too big, and kill the bottom end...

But yeah... as you say... its a hell of a lot of work and $$$ to get it right, and injection would be easier (but not as cool)

[2stroker]

Exactly right JrZook, the 90 degree adapter is terrible.

I have a Crane cam in my suzuki and I run twin hitachi side draft carbs, it performs beautifully at everything from idle to full noise. I do think that the twin 40 webbers are too big for 4x4 application where you want it to perform low in the rev range, but I would love to be sporting a set on my car just for the sound and looks.

That Redline manifold looks the goods. I just did some googling and found those manifolds are made by Redline here in Australia and then sent to the American market.

[SuziBlu]

Sadly, I cannot get a manifold here in OZ lol, searched hard, but nothing, even if I could, prob be cheaper to import from the states.

[JrZook]

2stroker wrote:

I run twin hitachi side draft carbs, it performs beautifully at everything from idle to full noise.

Are these CV style?

[2stroker]

JrZook wrote:

2stroker wrote:

I run twin hitachi side draft carbs, it performs beautifully at everything from idle to full noise.

Are these CV style?

Yes

[Jackson]

Those who have tried a 4k carb does the 1.3 sierra carby hat fit on? Thanks

[Built4thrashing]

Yes it does but you may need to use a different rubber O ring