Hello, i got a 400 SBC like 7 years ago, it has new berings and piston rings, roller lifters,roller rocker arms, comp cam.290 and 750 carb, i want to swap the carb and install the TPI system that i got in my 305. What changes did you recommend me to make this possible,if its possible? any suggestion that you guys give me is well appreciate it.

 

The tpi will choke a 400 in it's stock form. If you want to swap to efi post the cam specs and look into a Hsr or knock off Hsr.
Do you have a efi harness, a baffled fuel tank, larger injectors roughly 28-30#hr.

 

I dont remember the specs of the cam the only thing i know the mechanic told me it was a 290, i got all the Efi system because itin car and its running, baffled fuel tank i dont know its the one the that came with the car, my camaro has an lb9 engine 305 tpi. What is Hsr? Fuel injectors thats number one on my to buy list.

 

Hsr is a holley stealth ram, weind make a version as well.
You may want to determine how you are going to tune your efi, dynamic efi Ebl p4, stock ECM reprogramed, aftermarket ECM megasquirt, fast, holley.

 

wow sounds a lot more money!i think im gonna leave the 400 the way it is now, thanks for your help!

 

Tuned Performance, I am also new to this so please bare with me. I recently bought a HSR for a ZZ4 GM Crate engine and im in the process of doing a motor swap probably next month. I was looking into the reprogramming of my stock ECM (305 TPI in a '87GTA) but after reading your post the EBL P4 Flash seems like a great "upgrade" over the stock unit.
I did a google search on them and found their website and was reading about the advantages of going this route. I am not a master with the soldering gun so i would probably pay the small additional fee and let them install it for me. But like i said im not an expert by any means, could you maybe tell me from your experience the pro's vs the con's of going this route? Maybe what extra items i might need to pick up along the way?
Thanks in advance!