Where should I set my FP and timing at?

Limp Fox · Sep 28, 2009

Pretty much done with my HCI swap and ready to start her up tomorrow. Just have to install the Radiator, Electric fan and the Electrical fuel gauge. Just wondering where I should set my Fuel Pressure and timing at?

If it helps the Engine mods are below:
AFR 165 heads with 1.6 7/16 stud mount Rockers, Ed Curtus custom street beast cam (566ish lift and 224 duration, Edelbrock 5.0 intake, lower ported to match AFR's, 1" spacer, FRPP Red top 30lb injectors, Kirban FPR, MAC CAI, Pro M 75MM MAF, BBK 75MM EGR and TB, MSD 6AL2 (will install once I figure out where I want to mount it - inside most likely, but requires extending wires, MSD coil, MAC LT Headers, Prochamber and 40 series Flowmasters

Thanks

sparepartracer · Sep 28, 2009

I think a good start point would be about 42psi with vaccume line off on the fuel.Then about 10 or 12 degrees base advance until broke in.Then pull it up for desired setting.Would love to hear how it turns out.

Dino Dino Bambino · Sep 29, 2009

sparepartracer said:
I think a good start point would be about 42psi with vaccume line off on the fuel.Then about 10 or 12 degrees base advance until broke in.Then pull it up for desired setting.Would love to hear how it turns out.

Agree about the timing but 30lb injectors are rather big for that H/C/I combo. I'd suggest using the stock 39psi with vacuum off the regulator and have the whole combo properly tuned on the dyno with either a programmeable tuner or a custom chip to get the best results.
It's a well thought-out combo and with a good tune it should rip on the dyno.

Limp Fox · Sep 29, 2009

unless any one chimes in I will start out with the numbers your provided. Thanks for the response.

Limp Fox · Sep 29, 2009

I know a lot of ppl think 30# injectors are over kill, but there is a lot of people running them with no issues. I just figured it's better to have bigger injectors that are not running close to the max independence. Plus it helps if I had nitrous later on or what have you.

88-378 · Sep 29, 2009

those injectors are fine. You really only want to run an injector at about 85% capacity.

lincoln+ford · Sep 29, 2009

Limp Fox said:
I know a lot of ppl think 30# injectors are over kill, but there is a lot of people running them with no issues. I just figured it's better to have bigger injectors that are not running close to the max independence. Plus it helps if I had nitrous later on or what have you.

Nitrous?Maybe if you only ran a dry kit but why would you wanna do that.

Limp Fox · Sep 29, 2009

No plans to do it, just saying. Most likely I will go with a SC and have to bump up to 40#'s in a yr or two any how. Depends where I'm at. My job like every one else's is not guaranteed. Obami cut to much Military funding and I have one pay left till I got to go out in the civi World. Any time I can pass on Bami-bash I will.

Thanks for your response and thanks 88-378 for making that comment. Most people really feel 30#'s are over kill.

Dino Dino Bambino · Sep 29, 2009

88-378 said:
those injectors are fine. You really only want to run an injector at about 85% capacity.

Those 30lb'ers will be running at a lot less than that, which is fine. It's better to err on being slightly too big than too small. I don't know if the engine computer will be able to reduce the duty cycle far enough to prevent a rich condition, and that's why I suggested a tune to make sure.

Limp Fox · Sep 29, 2009

Where do you suggest going? I won't go to SGS since I feel I got ripped and the head shop they used rip me has well.

sparepartracer · Sep 30, 2009

Did you ever get the car running ???

Where should I set my FP and timing at?

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