machine work on a briggs

blake80 · 08-11-2012, 09:14 AM

have any of you had any machine work done to your briggs vtwin? im debating on getting some work done to mine but would like to know what you have done to yours and was it worth it.

sho305 · 08-12-2012, 03:22 PM

I had my head ported and cut for a clone, but not got it running in the cart yet. But, pretty typical thing to do. The guy at the shop that did it does a local team of lawnmower racers.

blake80 · 08-12-2012, 07:59 PM

I know i want my heads ported and polished. I also want the head snd block cut for higher compression. Been thinking about boring the block also.

hookm · 08-13-2012, 06:26 AM

Quote:

Originally Posted by blake80

I know i want my heads ported and polished. I also want the head snd block cut for higher compression. Been thinking about boring the block also.

Silly boy

blake80 · 08-13-2012, 07:18 AM

what?

i need more power

sho305 · 08-13-2012, 06:40 PM

I would drop a cam in it, but find out if you need rods and flywheels/etc to go with the cam. Make sure you get the right cam for your use. Cutting the head and porting will always help some, porting helps more with a cam that has higher flow. I didn't have this one ported that much they blended the pocket because the back of the valve seats had huge edges on them, then the short radius was like a 90 corner they took out. The rest they just blended and cleaned up. I'll find out what that and a 4 degree timing advance and dual springs does for now....along with high flow exhaust and airbox. I plan on a larger/better carb sometime soon have to make an intake first.

blake80 · 08-13-2012, 06:52 PM

I already have the performance cam with rev kit and advanced timing key. Its a very peppy motor but i want more. I know that cutting the heads and having the pistons cut flat will raise the compression, but what about running the longer arc rods. Also, if i bore the block, how much do i have it bored. Im also going to switch over to the two barrel intake but im not sure if i want to run the two barrel carb or run a makuni.

hookm · 08-13-2012, 07:31 PM

Quote:

Originally Posted by blake80

I already have the performance cam with rev kit and advanced timing key. Its a very peppy motor but i want more. I know that cutting the heads and having the pistons cut flat will raise the compression, but what about running the longer arc rods. Also, if i bore the block, how much do i have it bored. Im also going to switch over to the two barrel intake but im not sure if i want to run the two barrel carb or run a makuni.

Brandon, a lot of the lawn mower racers run 16 hp heads for more compression

Before you spend a bunch of money why not get a 23 block& switch your stuff over?

blake80 · 08-13-2012, 08:20 PM

Quote:

Originally Posted by hookm

Brandon, a lot of the lawn mower racers run 16 hp heads for more compression

Before you spend a bunch of money why not get a 23 block& switch your stuff over?

If i can find a bigger block, then im just going to build one nasty motor and i mean NASTY

if that was to happen then ill just leave my motor alone then sell it once the new motor is done. I have more ideas and wants than time and money.

hookm · 08-13-2012, 08:28 PM

Quote:

Originally Posted by blake80

If i can find a bigger block, then im just going to build one nasty motor and i mean NASTY

if that was to happen then ill just leave my motor alone then sell it once the new motor is done. I have more ideas and wants than time and money.

I have the time but not the money

08-11-2012, 09:14 AM	#1
blake80 REAL MEN GET EM DIRTY Join Date: Jun 2009 Location: rincon , ga. Posts: 3,646	machine work on a briggs have any of you had any machine work done to your briggs vtwin? im debating on getting some work done to mine but would like to know what you have done to yours and was it worth it.

08-12-2012, 03:22 PM	#2
sho305 Vegas modded 420 Join Date: Jun 2009 Location: West MI Posts: 15,443	Re: machine work on a briggs I had my head ported and cut for a clone, but not got it running in the cart yet. But, pretty typical thing to do. The guy at the shop that did it does a local team of lawnmower racers.

08-12-2012, 07:59 PM	#3
blake80 REAL MEN GET EM DIRTY Join Date: Jun 2009 Location: rincon , ga. Posts: 3,646	Re: machine work on a briggs I know i want my heads ported and polished. I also want the head snd block cut for higher compression. Been thinking about boring the block also.

08-13-2012, 07:18 AM	#5
blake80 REAL MEN GET EM DIRTY Join Date: Jun 2009 Location: rincon , ga. Posts: 3,646	Re: machine work on a briggs what? i need more power

08-13-2012, 06:40 PM	#6
sho305 Vegas modded 420 Join Date: Jun 2009 Location: West MI Posts: 15,443	Re: machine work on a briggs I would drop a cam in it, but find out if you need rods and flywheels/etc to go with the cam. Make sure you get the right cam for your use. Cutting the head and porting will always help some, porting helps more with a cam that has higher flow. I didn't have this one ported that much they blended the pocket because the back of the valve seats had huge edges on them, then the short radius was like a 90 corner they took out. The rest they just blended and cleaned up. I'll find out what that and a 4 degree timing advance and dual springs does for now....along with high flow exhaust and airbox. I plan on a larger/better carb sometime soon have to make an intake first.

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08-13-2012, 06:52 PM	#7
blake80 REAL MEN GET EM DIRTY Join Date: Jun 2009 Location: rincon , ga. Posts: 3,646	Re: machine work on a briggs I already have the performance cam with rev kit and advanced timing key. Its a very peppy motor but i want more. I know that cutting the heads and having the pistons cut flat will raise the compression, but what about running the longer arc rods. Also, if i bore the block, how much do i have it bored. Im also going to switch over to the two barrel intake but im not sure if i want to run the two barrel carb or run a makuni.

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