I know this isnt your first rodeo...I have seen your posts on the TDR. I would post the part number for the spring, but I honestly do not have it anymore. Trust me, i'm not trying to hide any info from y'all, but if you want to know bad enough, the information can be found if you ask the right people or pump shop. I never plan on running that many rpms and would agree it probably wouldnt fuel hard to that point. I'll post the 3 numbers on the spring when I grind on the afc arm, but it will probably be awhile before I break into the pump again. Just like JR said...just because you have the spring it doesnt mean you can turn those kind of rpm's. It would take the fuel, timing among ohter things. I never claimed to turn that kind of rpm...I just said I had the spring.

 

Ahhh..take out the spring out and weld a rod in there!
Infinity spring..wind it till it falls on it's face from lack of fuel or explodes...hopefully not the later.

Den

 

Cody...when in the heck did you get a 4200 spring?!

Mannnnnn I ain't seen you all in forever...I need ya to sing some songs to me.

 

i agree with bgilbert on pump shop. every time i walk into the only game in town i get a different answer to the same question. this is in chattanooga. looking for shop i can trust to install kta pump head soon as money permits. in a reasonable driving distance