hey i was wondering if a 30mm banshee carb would work better then a stock carb? oh and my motor is is .40 weisco piston and vforce reeds airfilter and a full pipe
30mm banshee carb on a blaster
- Thread starter clotheslined69
- Start date
A 30mm carb is a nice upgrade. If your going to get a Banshee carb, make sure it's the one with the choke. I'm not sure if it will fit the reed boot like my OKO does. You will have to mod the air filter boot to fit.
Banshee motors are more efficient than ours though. Ive noticed Banshees like their jetting very close to what we do.
However just to be sure, the banshee has the same carbs stock as a blaster, and if its off a banshee, just make sure it has a choke knob. And before you install it, pull it apart and check jet sizes and record em.
However just to be sure, the banshee has the same carbs stock as a blaster, and if its off a banshee, just make sure it has a choke knob. And before you install it, pull it apart and check jet sizes and record em.
Thats true, but theres a lot more to a carbs jetting than whats done to the motor itself. I say this because of experience with cross platform carbs. Example: Suzuki RM250 with a PJ34 carb. Stock jets are ~165 main and a 55 pilot. Guys on blasters who are running this carb are running very similiar jets to that. The RM250 engine makes more power than damn near ANY blaster on this site, but yet, the jetting stays roughly the same, cause the jetting is related more to what RPM the engine makes its power at, and the size of the carb more than whats done to the engine.
The main reason why you have to rejet for modifications is, generally when you do a VE mod (thats volumetric efficiency), youre increasing the engines RPM threshold and allowing it to pull more air at a higher RPM, so in the upper RPM range, the jet cant flow enough air to keep up with the engine. Likewise the same size jet will flow more/less fuel depending on the amount of flow across the venturi ports. More flow means more air/fuel will flow through that jet.
So, I understand what youre saying, but in general, even with my 28mm carb, the Banshee guys stick with relatively stockish blaster jet numbers too. The banshee guys run slightly less jet than us on average (Banshee with stock carbs and Toomey pipes with airbox lid removed will run a 280-310 and a blaster with stock carb and Toomey pipe with airbox lid removed will be in that realm too)
I know Im getting more technical than I should given the question, but I want to make sure people understand that jets are more specific to the carb size, than the engine size.
The main reason why you have to rejet for modifications is, generally when you do a VE mod (thats volumetric efficiency), youre increasing the engines RPM threshold and allowing it to pull more air at a higher RPM, so in the upper RPM range, the jet cant flow enough air to keep up with the engine. Likewise the same size jet will flow more/less fuel depending on the amount of flow across the venturi ports. More flow means more air/fuel will flow through that jet.
So, I understand what youre saying, but in general, even with my 28mm carb, the Banshee guys stick with relatively stockish blaster jet numbers too. The banshee guys run slightly less jet than us on average (Banshee with stock carbs and Toomey pipes with airbox lid removed will run a 280-310 and a blaster with stock carb and Toomey pipe with airbox lid removed will be in that realm too)
I know Im getting more technical than I should given the question, but I want to make sure people understand that jets are more specific to the carb size, than the engine size.
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