my new 355 is bogging...u punch it at like 2500rpm and it will bog down untill like 4k...but if you punch it when its above 3k, it just pulls fine...The motor only has like 200 miles on it, but the machine shop said since the pistons have 10k miles on them(used out of a different motor, the machine shop said they checked out okay), the motor doesnt need to be broken in...any ideas on what could be happening? heres the specs...

ross racing pistons -6cc dish
xe230/236 cam
eagle rods
ported heads
28# injectors
stock TB
ported MAF
stock fuel pump (untill i can get time to put a walbro in)
holly FPR @43.5psi
pcmforless tune

im thinking maybe the AF ratio is off, or since it has 1.6 pro magnums and doesnt have the lt4 knock module the knock sensor could be pulling timing??...any thoughts?

I am going to start tuning it myself as soon as i get the software up and running, i am going to log a run as soon as i get a good battery for my laptop, mabye that will tell me whats goin on with it

 

General troubleshooting needs to be discussed in a gen spacific forum. Transfering to LT1 Tech, Thank you.

 

What is the range on the cam? Checked for knock? Have you checked the fuel psi while driving @ WOT, not just with pulling a vaccum line? What vaccum you pulling?

You might just need to add some timing down low?

 

are those LS or SVO injectors?

 

they are the bosch injectors, thats all i know...i havnt had time to log a run, i just got it running yesterday, let me log a run and then i will post again once i do that...and i thought since this isnt a stock motor, it could be in advance tech...sorry