Jump to content

Fuel Suggestions !! Please help!


Recommended Posts

18 minutes ago, ClaudeMachining said:

No advance.

Now squish and uccr tests.

Envoyé de mon SM-G965W en utilisant Tapatalk
 

Yup, I wanna know what the squish is and exactly what octane fuel you were using when it was backing plugs out. My guess is going to be poorly designed domes. I am assuming these are trinity domes, and that does not give me the warm fuzzies.

Link to comment
Share on other sites

Yup, I wanna know what the squish is and exactly what octane fuel you were using when it was backing plugs out. My guess is going to be poorly designed domes. I am assuming these are trinity domes, and that does not give me the warm fuzzies.
Yes, trinity domes doesnt have a good rep.

Envoyé de mon SM-G965W en utilisant Tapatalk

Link to comment
Share on other sites

Yup, I wanna know what the squish is and exactly what octane fuel you were using when it was backing plugs out. My guess is going to be poorly designed domes. I am assuming these are trinity domes, and that does not give me the warm fuzzies.

91 octane and yes it’s a trinity cool head with trinity domes. how do I perform the squish test with the engine on the bike ?


Sent from my iPhone using Tapatalk
Link to comment
Share on other sites

  • 3 weeks later...

I’ve gone through a few trinity motors with that same set up. At 160 psi with porting, the actual compression ratio will be a bit on the high side for sure. So you will definitely need to give it race fuel to keep the plugs from backing out. A 9 range plug may also help. Verify your stroke for sure stock is 54mm, 4mil Stroker is 58mm. Don’t be close, be sure  

 Also, if you’re doing a 2/1 carb on a motor that size, make sure to have an upgraded larger single petcock, gutted check ball on gas cap, and a billit bowl on the carb. 

As far as squish test, you tube some of the South Texas Banshee stuff. He has video how to’s. You can also Google a guy that used to run a blog for banshees and blasters called MacDizzy. He used to put a lot of detail out on how to do all of that. Base gaskets play a role in all of this. 

Link to comment
Share on other sites

I’ve gone through a few trinity motors with that same set up. At 160 psi with porting, the actual compression ratio will be a bit on the high side for sure. So you will definitely need to give it race fuel to keep the plugs from backing out. A 9 range plug may also help. Verify your stroke for sure stock is 54mm, 4mil Stroker is 58mm. Don’t be close, be sure  
 Also, if you’re doing a 2/1 carb on a motor that size, make sure to have an upgraded larger single petcock, gutted check ball on gas cap, and a billit bowl on the carb. 
As far as squish test, you tube some of the South Texas Banshee stuff. He has video how to’s. You can also Google a guy that used to run a blog for banshees and blasters called MacDizzy. He used to put a lot of detail out on how to do all of that. Base gaskets play a role in all of this. 

Thank you for the info ! What do you mean by 9 range plug ? Do you have a part number you would recommend ? Also what fuel ratio / mix would you suggest trying ? I will look up the test and get that done soon !


Sent from my iPhone using Tapatalk
Link to comment
Share on other sites

  • 3 weeks later...
On 3/29/2020 at 3:39 PM, Dmac68 said:


Thank you for the info ! What do you mean by 9 range plug ? Do you have a part number you would recommend ? Also what fuel ratio / mix would you suggest trying ? I will look up the test and get that done soon !


Sent from my iPhone using Tapatalk

32:1 Blendzall. If you don’t have Blendzall, find any other performance castor bean oil. Castor927 is a pretty good one. Mix with fresh 110. If you’re buying from the Sunoco gas pump, make sure it’s a place with high turnover so the fuel is fresh. 

9 range plug is just the heat range on plugs. Typically guys have an 8 heat range plug in them like B8es or BR8es. A 9 range plug is a cooler burning plug. 

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
×
×
  • Create New...