lex afm / 550 questions

[Supraguy7M]

So I just bought my lex afm and my 550cc injectors. What else is needed to make this mod work seamlessly? I've been rebuliding for a while and I dont want any driveability issues when I finish it finally. Another thing is, I've replaced the stock ct26 with a 60-1 ct26 upgrade, full 3in exhaust, bc stage 2 cams, and a new fmic. Some other things along the way, but my question is, what kind of boost can I run with that setup? (Wideband 02 installed as well) what might I make for hp? Torque?

Thanks for your help in advance!

 

[Dan_Gyoba]

Put them in at the same time. Done. It should give you zero issues, though you may want to make use of the adjustment screw in the AFM. Turn it all the way in to start is the most probable correct position.

You can probably run as much boost as you want. But I'd look into upgrading the fuel pump and fuel pressure regulator. Something to actually TUNE your AFR would probably be a good idea as well, but you can see what you can do.

Turn up the boost slowly, look at your wideband logs. If AFRs are safe, turn it up some more. If you AFRs are getting dodgy, look at what you need to upgrade next.

 

[Supraguy7M]

I put a walboro 255 fuel pump in it when I got it cuz the original was bad. The only thingiI dondon't have is the fpr as of right now, but the cars still in pieces so I have time to get one.

 

[Supraguy7M]

Also what will the factory lower end handle?

 

[HMNGSupraMKIII]

I kno a guy with mid 400Hp with rebuild head and stock bottom end. Depending on condition, the bottom can handle around 450hp. I wouldn't go higher than that on the stock block but that's just me.

 

[Supraguy7M]

I'm not aiming for much more then 400 at the moment. Do you know what he is running for boost?

 

[Nick M]

So I just bought my lex afm and my 550cc injectors. What else is needed to make this mod work seamlessly

 

[Supraguy7M]

I guess my question would h what will the Lower end handle for boost? Providing my fuel system can support it.

 

[HMNGSupraMKIII]

I think he said he was running 18psi. He had an upgraded 60-1 CT26

 

[Supraguy7M]

I think he said he was running 18psi. He had an upgraded 60-1 CT26

I think 18 psi is all I would wanna run till I rebuilt the entire engine, not just my top end.

 

[Nick M]

I guess my question would h what will the Lower end handle for boost?

A composite headgasket with factory torque settings can handle factory power.

 

[IndigoMKII]

I wonder how the ecu is going to like the bc stage 2 cams..

 

[Supraguy7M]

A composite headgasket with factory torque settings can handle factory power.

Its got an hks mhg, and arp head studs

 

[Supraguy7M]

I wonder how the ecu is going to like the bc stage 2 cams..

I didn't think it would mess any of that up. How would it affect my ecu? All they do is open the valves longer and further for better flow thru the head.

 

[IndigoMKII]

I didn't think it would mess any of that up. How would it affect my ecu? All they do is open the valves longer and further for better flow thru the head.

Letting in more air/fuel but not changing the timing to account for the change.

I could be wrong though of course.

 

[Supraguy7M]

Letting in more air/fuel but not changing the timing to account for the change.

I could be wrong though of course.

I have adj. Cam gears to assist valve overlap on the new cams. As long as my cps is ok, and I have my engine timed correctly I believe they should b fine. If I'm wrong please let me know

 

[sylquebec]

A composite headgasket with factory torque settings can handle factory power.

Haha! I'm not sure about that one!!!!

 

[Rollus]

I agree with that one. I've seen stock internal (including HG) handle 270HP for years.

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