Camaro LT5

[randy]

Fuel pressure question

When you turn the ignition on does the fuel pumps hold fuel rail pressure? Recently installed a lt4 in a friends 69 and ignition on the fuel pressure goes to 40ish and then drops to zero. Tested this with a online -6an fuel pressure gauge at the fuel inlet at the engine. My gmpp ls3 swap it will hold the fuel pressure with key on

Secondary fan/ AC fan activation

I noticed on a gmpp tune the second fan doesn’t come on till 221 degrees. What do you set your fan settings at? Can you activate the secondary fan with the ac on?

[CarlC]

Originally Posted by randy

Fuel pressure question

When you turn the ignition on does the fuel pumps hold fuel rail pressure? Recently installed a lt4 in a friends 69 and ignition on the fuel pressure goes to 40ish and then drops to zero. Tested this with a online -6an fuel pressure gauge at the fuel inlet at the engine. My gmpp ls3 swap it will hold the fuel pressure with key on

What fuel pump is being used and how is it driven?

[randy]

Originally Posted by CarlC

What fuel pump is being used and how is it driven?

Carl we have spoken before and I’m sure Rodney has at rods car craft in Wylie Tx. Dual 450 pumps, ricks billet hat, returnless, your lt4 controller splitting the gray wire I think that is twisted in the gmpp harness

[raustinss]

So back to the i.r.s question, would you recommend doing a irs "kit' swap using c6 subframe to a 70 A body

[jmac]

Mark,

I noticed that your rear brake caliper is mounted at the 9 o'clock position, if you were looking at it from the driver's side.

Is there a reason you do this? Any benefit or added performance from the caliper being mounted there instead of the usual 2-3 o'clock position?

Thanks!

[Stielow]

Originally Posted by jmac

Mark,

I noticed that your rear brake caliper is mounted at the 9 o'clock position, if you were looking at it from the driver's side.

Is there a reason you do this? Any benefit or added performance from the caliper being mounted there instead of the usual 2-3 o'clock position?

Thanks!

This is the drivers side


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[jmac]

Originally Posted by Stielow

This is the drivers side


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Is that just the way the Brembos mount? I'm used to seeing them more towards the rear on the other side of the axle.

Does mounting like that have any advantage or is it just cosmetic/packaging, brake line routing friendly?

[randy]

Have you noticed much difference between mid and long tube headers performance wise? Looks like you are running mid lengths and 3” exhaust correct?

[Stielow]

Originally Posted by raustinss

So back to the i.r.s question, would you recommend doing a irs "kit' swap using c6 subframe to a 70 A body

Nope


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[CarlC]

Originally Posted by randy

Carl we have spoken before and I’m sure Rodney has at rods car craft in Wylie Tx. Dual 450 pumps, ricks billet hat, returnless, your lt4 controller splitting the gray wire I think that is twisted in the gmpp harness

To hold fuel pressure at key-off an inline check valve will be needed. The bypass in the Rick's hat will drain off fuel in the line.