Blaster Adding third pulse nipple

[motoman3000]

So I smartened up and got a new set of triple 44 sbn. Problem is, the kawi 1100 case has only 2 pulse fittlings.

I tried teeing off for the mag and center carb with the pto carb on its own but no fire. I guess having dedicated and even pulse lines matter. ( with a tee all pulse lines were diff lengths)

After some research and phone calls I find that I have to drilli/tap for a third pulse. I have a speed plate so easy off and enough room for a drill in blasters bilge. I was told with being careful and a vacuum I can do this while engine still is in the ski.

Will my reeds be directly under the fitting? I really don't want to take off manifold again

 

[speedysprocket]

Take your manifold off! Unless you want to process aluminum chips through the engine...

 

[motoman3000]

Yes that's the route I will take. Shortcuts are nice but can b $$$.
Any tips? Guess I'll need an ext for the tap? Anyone ever just use jb weld or something similar ?



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[Big Kahuna]

I would order a press in fitting..... Drill. Then install the fitting.

 

[motoman3000]

I found a brass fuel splice barb in my parts. The inlet measures the same as pulses on case but OD is larger.
Was thinking I could grind/ taper one end then pound her in?
I never knew how involved in engines I would have to be just to ride. Love learning though


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[SUPERJET-113]

Ive drilled and jb welded in a pressed brass fitting before with no problems. I couldn't get the exact tolerance for the perfect "press fit", so a little JB on and slide her in!

 

[Big Kahuna]

Just got done having my cases welded where I had drilled and tapped before. It developed a crack there.

 

[motoman3000]

Got her done. I believe the OD of the fitting after a few turns on the grinder to scuff it near 5/16 but tapered the end.
Drilled a 19/64 hole then used jb and the female end of my ratchet extension to pound on.
I did not know I needed to add an extra pulse w/ a carb conversion and the importance of them. I couldn't even get a blubber when i used a tee for the middle carb


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[SXIPro]

I'd get a real pulse fitting from JetManiac, use red loctite, tap it in, and then put a bead of epoxy around the base of the fitting where it meets the manifold.

Oops, I was slow on the draw.

 

[motoman3000]

Didn't think of using loctite b/c there weren't threads but I guess it still creates a seal threads or not


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[Mark44]

I prefer to use a fitting that I can drill and tap the case for.

 

[Big Kahuna]

I prefer to use a fitting that I can drill and tap the case for.

I had drilled the boss up front for a fitting on mine. Just had to weld it up because the cases were so thin and it had actually cracked.....

 

[Mark44]

BK I taped mine and my wifes 1/8" NPT with no issues.

 

[Big Kahuna]

mine were taped also........ Granted, They were 10 years old. But still cracked!!!!!!!!!!

 

[Vumad]

I added a second pulse to my 750bp. I used a stock pulse fitting and jb weld. I thought I posted pics but I don't remember where. I used a hex speed load bits and a 8" extension, started with a small pilot hole and opened it up to eleminate wobble. I shoved a rag in the intake and ran the shop vac as I drilled. I put jb weld on the fitting then tapped in in with a 2-4oz hammer.

 

[///M5]

How did you guys drill the hole, did you use and extended drill bit to get the angle straight? Also, where is the best place to put it?

 

[john zigler]

We sell a press in kit, WITH correct sized drill bit.

Although, I do not like to do it, I have done it in the hull with engine assembled. Remove carbs, intake, reeds, etc. Stuff a paper towel deep into the intake track. I then "grease" the drill bit to help hold shavings to it. I also us a vacuum to get all other shavings. I like to seal the pulse nipple with a little JB weld.

https://www.watcon.com/fuel-system/dual-pulse-fitting/dual-pulse-fitting-1

 

[///M5]

We sell a press in kit, WITH correct sized drill bit.

Although, I do not like to do it, I have done it in the hull with engine assembled. Remove carbs, intake, reeds, etc. Stuff a paper towel deep into the intake track. I then "grease" the drill bit to help hold shavings to it. I also us a vacuum to get all other shavings. I like to seal the pulse nipple with a little JB weld.

https://www.watcon.com/fuel-system/dual-pulse-fitting/dual-pulse-fitting-1

Thanks, I wouldn't do it with the engine in either. Where is the best place to drill the hole on the intake?

 

[Vumad]

How did you guys drill the hole, did you use and extended drill bit to get the angle straight? Also, where is the best place to put it?

I added a second pulse to my 750bp. I used a stock pulse fitting and jb weld. I thought I posted pics but I don't remember where. I used a hex speed load bits and a 8" extension, started with a small pilot hole and opened it up to eleminate wobble. I shoved a rag in the intake and ran the shop vac as I drilled. I put jb weld on the fitting then tapped in in with a 2-4oz hammer.

 

[///M5]

Yeah, I don't have those bits so I'll probably just pick up an extended bit. Can you tell me where you placed the hole?