ok everyone got a stealth ram installed on my afr heads. When i had the tpi on it ran like a bat outta hell now when i put this intake on it wants to bog pass 4000 rpm what the hell can be wrong ???? Fuel pressure is set at 43 psi. The way i have my lines ran is the main fuel line supplying the rails then coming out the rail to a aeromotive regulator going back to the tank is this way correct to run or did i mess it up. Timing is set at 6 degrees btdc with the by pass unhooked starts right up no problem but wont go past 4000 rpm any help will greatly appreciated

this how i have my fuel plumbing set up on my hsr is this not correct way to run it ?

thanks for the reply it goes like amazingly puts you in the seat no problem feels nice and strong but as soon as you get above 4000 or try to go full throttle forget about it falls on its face

How old is the ignition module?

What spark plugs are in it?

fuel rail route is fine. In one, cross over to other, out to regulator then back to tank

wideband will show fueling thru the pull. Or get a scan aldl cable and tunerpro rt. Take readings

Ignition module is fairly new i replaced it with a new gm ac delco module and as well added the white lithium grease to the bottom. Im just really stumbed on thos had the same problem with my vortec hsr as well

It was whatever came with the module i always thought it was white grease but i was wrong. Im getting in contact with scott hansen he does chip burning for these kind of builds big tpi guru he is. Hopefully it will run correctly with this i just dont understand how i went from a running strong tpi intake to this sweet intake and now its giving headaches. Im going to try the timing at 8 btdc and see if this changes anything or do you think i should just drop it in at 0 and see what happens. This is all on the stock tune though 5.7 tpi mass air flow auto. Even though im using a 5.7 tpi mass air flow with t5 it should still be able to run up to 5000-5500 rpm.

skip the chip and find the problem first. You dont just swap an intake and all of a sudden have issues. What other mods are on the car?
Stock maf system will run a stealth ram just fine to 6000 rpm, you dont need a chip although there is some power to be had. Ran fine before and runs to 4000, something is screwing up

It idles just fine right at 700-750 rpm nice and smooth will rev up with no problem. The fuel pump and regulator are brand new walbro255 pump and aeromotive external regulator so i doubt those are the problem. Fuel filter i will install a new one since it is only 8-10 bucks and takes 2 minutes to change but doubt that is the problem.

Ok here is a update so i pulled the intake off and valve covers to see how things look with the valvetrain. I actually saw a few weird looking retainers sitting by the lifters 🤔🤔🤔🤔 look like the retainers that hold the internal pieces of the lifter together. Did i not preload the lifters enough? i was told go zero lash and thats it on the flat part of the cam then go on to the next cylinder and do the same. Could any damage be done to the cam after finding these retainers? Hoping not cause the cam and lifter combo wasn’t cheap. People told me that it could create a flat spot on the lobe’s of the cam when that happens

Yikes never seen that before! Definitely want to pull it apart and inspect lifters and cam lobe

I always set preload using intake closing exhaust opening method. Ensure the lifter is on the base circle