Guys...OH. MY. GOD.

[Demonic]

Ah ok.

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[Hack]

I'm hardly an expert, but I thought I understood the piston to be closest to the valves just before and just after TDC of the exhaust stroke, hence the use of valve pocketing on the cylinders of the higher compression engines. I've read valve to piston clearance will usually be about 0.080" to 0.100" during that phase?
Here's a 5.2 block custom build, mentioning checking piston to valve clearance while setting the timing of the cams:
https://www.racepagesdigital.com/st...ences-stocker-5-2-liter-coyote-engine-builds/
And Shaun from AED talking about avoiding valve strike when changing the timing on the older gen GT coyote's:
https://www.svtperformance.com/threads/stock-cam-specs.823528/

I'm more familiar with cam in block engines and that's what I've worked on before. I would assume valve timing would be similar. Usually exhaust valve on those engines from what I remember is farther away from the piston than the intake valve tends to be.

Extending duration (depending on cam timing) is where you can really get into trouble with PTV clearance.

The valves are generally never open when the piston is at TDC. Usually whichever valve is closing as the piston comes up and opening as the piston travels downward.

 

[nastang87xx]

Extending duration (depending on cam timing) is where you can really get into trouble with PTV clearance.

Yep, because as that valve is still open, that piston is saying "yo homie, I'm headed back up!"

And duration doesn't mean fully open for 223 or 242. Obviously that would be impossible lol. That lift can start to snap back to close right away but the lobe can still keep the valve open for a long time and then slam the valve shut pretty quickly.

 

[Tomster]

It was more of a "WHEN WILL IT STOP?"

I've been asking that question for a while now. Well, I guess we have an answer, lol

 

[AdamIsAdam]

$2k for 20hp just ain't worth it IMO. Not even close. @honeybadger how much hp are you putting out in your build? I didn't follow it all, but you stayed NA and flat plane, right?

Blowers weigh 150lbs all in? wow.

 

[tedj101]

Figured, o well.

ya, I’m concerned about that $35k lump in there I so often rev to 8250 rpm is the issue though...

FWIW, I just had my engine replaced under warranty. The service rep showed me the bill to Ford and I can assure you, you don't want to do anything that will void that warranty!

<TED>

 

[firestarter2]

FWIW, I just had my engine replaced under warranty. The service rep showed me the bill to Ford and I can assure you, you don't want to do anything that will void that warranty!

<TED>

How much?

 

[nastang87xx]

Blowers weigh 150lbs all in? wow.

Well the blower itself, the plumbing, the heat exchanger, the intercooler, the additional coolant tank, the hardware and brackets, the pullies, and the fluilds. It adds up fast.

 

[AdamIsAdam]

FWIW, I just had my engine replaced under warranty. The service rep showed me the bill to Ford and I can assure you, you don't want to do anything that will void that warranty!

<TED>

OH POST THAT UP!! redact as needed, but post it up!

 

[Greg35]

I've seen three guys post engine replacement invoices of $27,000-28,000+ and one was $30,000. Not chump change!

 

[Sagittaria]

For whatever reason they didn't include the dyno chart for the flat plane.. but they did for the cross plane. I imagine the flat plane will mirror these curves fairly closely.

IMO fairly typical for a set of cams... lose bottom end for top end. Luckily the GT350 has a lot of top end. But I probably wouldn't want to run a set on the street.

 

[Greg35]

I posted much info. few months ago on this new cam offering from L&M. It appeared from email discussion back and forth with him that expected HP gains of 15- 20hp NA. And "keep stock torque down low" comment he gave was rather vague I thought. He did tell me DYNO result would be posted as soon as avail.
Know of one guy who got his CPC grind 5.w cams installed in his fully built FI engine. Need that FPC cams NA Dyno!

 

[honeybadger]

Anyone aware if these are sold as intake only?

 

[nastang87xx]

Anyone aware if these are sold as intake only?

Kev, I talked to L&M about this. They have advised against doing intake side only with the Voodoo. Won't hurt anything but apparently leaves a lot on the table although if you talk to Mike I'm sure they can figure something out because so much of their stuff is custom anyway. Let me know if you find anything else out. I haven't had a conversation in a while.

 

[Shift]

I've seen three guys post engine replacement invoices of $27,000-28,000+ and one was $30,000. Not chump change!

Including labor, the bill rang out to $30k for my motor.

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