Go Back   DIY Go Kart Forum > Building Plans And Advice > Go Kart Discussion

Notices

Reply
 
Thread Tools Display Modes
  #1  
Old 04-01-2020, 05:47 AM
cretella8348 cretella8348 is offline
Junior Member
 
Join Date: Feb 2020
Location: Savannah GA
Posts: 9
Thanks: 1
Thanked 0 Times in 0 Posts
Default Predator 212cc Hemi Upgrade ?

Installed a stage 1 kit on my predator 212cc hemi. What is the next best step for more power.....mikuni carburetor, governor removal?
Attached Thumbnails
IMG_2598.jpg   IMG_2604.jpg  

IMG_2602.jpg  
Reply With Quote
  #2  
Old 04-01-2020, 07:03 AM
PullHorse PullHorse is offline
Senior Member
 
Join Date: Mar 2018
Posts: 104
Thanks: 22
Thanked 16 Times in 16 Posts
Default

Governor removal for sure and then that might be enough. Could go billet rod and heavier springs too. Looks good man!
Reply With Quote
  #3  
Old 04-01-2020, 07:55 AM
Wilson_Engine_Shop's Avatar
Wilson_Engine_Shop Wilson_Engine_Shop is offline
Supporter
 
Join Date: Oct 2019
Location: Independence, Kansas
Posts: 184
Thanks: 139
Thanked 24 Times in 23 Posts
Default

Maybe a Mod2 cam too? It just has more duration than stock with same lift. I have one in my offroad build but its not enough for me lol
__________________
Build it. Run it. Break it. Repeat
Reply With Quote
The Following User Says Thank You to Wilson_Engine_Shop For This Useful Post:
Solomonster212 (04-01-2020)
  #4  
Old 04-01-2020, 08:50 AM
Solomonster212's Avatar
Solomonster212 Solomonster212 is online now
High Compression Member
 
Join Date: Feb 2020
Location: Hoover, Alabama
Posts: 192
Thanks: 135
Thanked 31 Times in 28 Posts
Default

This depends on how much money you want to spend on it. Little money = little power gains. Big money = big power gains.

If you want to go cheap then do a governor removal, billet rod, and 18lb valve springs. You should be around 85 or 90 bucks at that.

If you want big power and rpm, I'd do the gov delete, billet rod, some porting, HOT265 cam, billet flywheel, 24lb valve springs, oil sensor delete, mikuni, run maybe some 93 or higher. You should be around 300 bucks for that.

---------- Post added at 09:50 AM ---------- Previous post was at 09:49 AM ----------

That's a nice kart by the way.
__________________
I do karting on the side... And cars on the other side... And --- wait, how many sides do I have?
Reply With Quote
The Following 3 Users Say Thank You to Solomonster212 For This Useful Post:
cretella8348 (04-01-2020), Flyinhillbilly (04-03-2020), Wilson_Engine_Shop (04-01-2020)
  #5  
Old 04-01-2020, 10:06 AM
mckutzy mckutzy is online now
Senior Member
 
Join Date: May 2008
Location: bc, canada
Posts: 7,940
Thanks: 910
Thanked 1,898 Times in 1,571 Posts
Default

Here's some easy ones....

https://affordablegokarts.com/pages/performance-basics
__________________
10yr+ club..... My current ride- http://www.diygokarts.com/vb/showthread.php?t=5461
Reply With Quote
  #6  
Old 04-01-2020, 11:07 AM
karl karl is offline
Senior Member
 
Join Date: Feb 2011
Location: North east Ohio
Posts: 1,570
Thanks: 127
Thanked 339 Times in 274 Posts
Default

No one is going to mention raising the compression ratio?

Something that actually increases the pulling power of the motor, to help accelerate quicker with the same gear ratio?

Anyways deleting the head gasket should raise the ratio to around 9.5 to 1, Maybe 15% increase in torque? Piece of glass, some grinding compound, much cheaper than even a budget cam.

Then you might have a reason to run premium fuel lol
Reply With Quote
  #7  
Old 04-01-2020, 11:22 AM
cretella8348 cretella8348 is offline
Junior Member
 
Join Date: Feb 2020
Location: Savannah GA
Posts: 9
Thanks: 1
Thanked 0 Times in 0 Posts
Default

I thought if the governor was removed that a new cam, rod, and flywheel were needed as we’ll?.....or is that strongly suggested.
Reply With Quote
  #8  
Old 04-01-2020, 11:37 AM
PullHorse PullHorse is offline
Senior Member
 
Join Date: Mar 2018
Posts: 104
Thanks: 22
Thanked 16 Times in 16 Posts
Default

Quote:
Originally Posted by karl View Post
No one is going to mention raising the compression ratio?

Something that actually increases the pulling power of the motor, to help accelerate quicker with the same gear ratio?

Anyways deleting the head gasket should raise the ratio to around 9.5 to 1, Maybe 15% increase in torque? Piece of glass, some grinding compound, much cheaper than even a budget cam.

Then you might have a reason to run premium fuel lol
Does the 0.10 arc gasket count ?
Reply With Quote
  #9  
Old 04-01-2020, 12:30 PM
Solomonster212's Avatar
Solomonster212 Solomonster212 is online now
High Compression Member
 
Join Date: Feb 2020
Location: Hoover, Alabama
Posts: 192
Thanks: 135
Thanked 31 Times in 28 Posts
Default

Quote:
Originally Posted by cretella8348 View Post
I thought if the governor was removed that a new cam, rod, and flywheel were needed as weíll?.....or is that strongly suggested.
Those are just highly recommended.

The reason you want billet rod and flywheel is because they can break at higher rpms.

I personally made about 10 runs with an ungoverned engine on stock rod and flywheel. But some other don't get that lucky, so upgrade and be safe.
__________________
I do karting on the side... And cars on the other side... And --- wait, how many sides do I have?
Reply With Quote
  #10  
Old 04-01-2020, 01:34 PM
mckutzy mckutzy is online now
Senior Member
 
Join Date: May 2008
Location: bc, canada
Posts: 7,940
Thanks: 910
Thanked 1,898 Times in 1,571 Posts
Default

No gov and stock springs with stock rod/flywheel is fine...
You start into changing the springs, then the rod will let go...
__________________
10yr+ club..... My current ride- http://www.diygokarts.com/vb/showthread.php?t=5461
Reply With Quote
  #11  
Old 04-01-2020, 01:42 PM
Solomonster212's Avatar
Solomonster212 Solomonster212 is online now
High Compression Member
 
Join Date: Feb 2020
Location: Hoover, Alabama
Posts: 192
Thanks: 135
Thanked 31 Times in 28 Posts
Default

I was running 18lb valve springs. No issues at all.
__________________
I do karting on the side... And cars on the other side... And --- wait, how many sides do I have?
Reply With Quote
  #12  
Old 04-03-2020, 11:53 AM
Flyinhillbilly's Avatar
Flyinhillbilly Flyinhillbilly is offline
The great cornholio
 
Join Date: Oct 2015
Location: North West Arkansas
Posts: 2,348
Thanks: 2,376
Thanked 1,089 Times in 770 Posts
Default

Quote:
Originally Posted by Solomonster212 View Post
This depends on how much money you want to spend on it. Little money = little power gains. Big money = big power gains.

If you want to go cheap then do a governor removal, billet rod, and 18lb valve springs. You should be around 85 or 90 bucks at that.

If you want big power and rpm, I'd do the gov delete, billet rod, some porting, HOT265 cam, billet flywheel, 24lb valve springs, oil sensor delete, mikuni, run maybe some 93 or higher. You should be around 300 bucks for that.

---------- Post added at 09:50 AM ---------- Previous post was at 09:49 AM ----------

That's a nice kart by the way.
Iím going to agree with this, you can get as wild as your budget will allow. Iíve spent a lot of money on a couple of predators, and they are bad fast, but it took a LOT of money to get them to where they are.
__________________
You can't drink all day if you don't start in the morning
Reply With Quote
The Following User Says Thank You to Flyinhillbilly For This Useful Post:
Solomonster212 (04-03-2020)
  #13  
Old 04-07-2020, 12:01 PM
madprofessor madprofessor is offline
Erased.
 
Join Date: Sep 2019
Location: Jacksonville, Florida
Posts: 101
Thanks: 1
Thanked 27 Times in 22 Posts
Default Springs = flywheel.....

My last 212 hemi didn't get a new flywheel to go with its governor linkage disconnect because the stock valve springs will start to float around 5200-5500 rpms, so you can't likely spin it fast enough to shatter the cast iron stock flywheel. A 6.2 degree timing advance key took care of the poor stock timing.
My current 212 hemi does have a new PVL 28 degree flywheel (with 6 degree advance key) because it got new 22 lb. valve springs and will likely spin up 7200 rpms. That would be stupidly unsafe with a cast iron.
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -6. The time now is 09:36 AM.