Patsy57

iTrader: (37)

I was wondering at idle what the proper vac level is? My gauge reads 5 and low at idle.

Thoughts?

430LSX race motor

Running Na

With a blower cam just no post yet

JakeFusion

iTrader: (7)

What cam is in it? 5" hg is pretty damn sorry. But if it's a race motor... It'll probably scream up top.

How does it drive?

1970camaroRS

iTrader: (8)

What are the specs on this "blower cam"?

Patsy57

iTrader: (37)

I'm an idiot i didn't have the vac line connected to the vac block.

I'll send an update tonight

Patsy57

iTrader: (37)

Current cam is:

Duartion @.050 238/247 .637/.629 Lobe SEP 112 Degree +4 ADV)



im seeing 20" at idle


it drives bumpy but needs a retune.

the blower isn't on yet and the can is a blower cam. Is that the normal amount of vac at idle? Gauge says low vac.

Lsxford

iTrader: (6)

20" at idle seems about right with that size cam to me. But i am no expert, you have more vacuum than me and my cam is a 238 and 625 lift on both sides iirc

Patsy57

iTrader: (37)

What vac level do you run?

speedtigger

iTrader: (16)

Those are some odd looking 430" blower cam specs. What head, intake and blower?

Patsy57

iTrader: (37)

Blower is an F1R cog drive. Heads are AFR 225 cathedral port, intake is a FaST 102

speedtigger

iTrader: (16)

You have a big engine with smallish heads, a long runner intake and an aggressive blower. If I have spec'd that camshaft, it would look more like 242/258 on 116. That cam you have there will likely be RPM limited, and leave power on the table.

Patsy57

iTrader: (37)

I'm going to be upgrading the heads soon gonna go with AFR 235 heads or TFS 245

JakeFusion

iTrader: (7)

I'd move over to an LS7 head on a 430.

And that cam looks like a good NA cam for a streetable 402.

Patsy57

iTrader: (37)

When looking at LS7 heads what do I have to worry about in regards to valve placement ?

Lsxford

iTrader: (6)

i see around 13-15 inches 750 rpm idle, but im just starting to get the tune lined up