searched but did not find an answer to my specific question, I have some h22 345cc injectors and im installing a t3 turbo bout 5 to 7lbs boost. Will thease injectors hold up with a walbro 255 fuel pump installed later down the road, not ryt now. There will be no need to grow dont want to run more boost on a stock block.

 

345's will probably top out on that setup, but of thats all you want to run, then you are fine.

 

ok thanks ya 7lbs max im putting a f22b1 head and it milled a 30ths with a 3 angle valve cut so I dont want to do to much. Also I got some arp head studs at 7 lbs will a block guard be good for more insurance, and if so any suggestions

 

block gaurds were thought to be good in the day. truth is they expand at a different rate than the block, and sometimes wreak more havoc than just leaving them out. 7psi is fine for stock unguarded sleeves.