Weird colored reversion.

[77cruiser]

Why is it this color?

[Ericnova]

Are you using an octane booster with MMT in it??

[77cruiser]

Are you using an octane booster with MMT in it??

No non oxy pump. Yea looks like my plugs did when I dynoed it & we put some race gas booster in it.

[CGT]

I agree looks like MMT, but not to sidetrack...I'd be interested in knowing more about the engine combination, in that why its getting so much reversion.

[PRH]

Looks more like staining than reversion to me.

It’s mostly on the secondary side....... even in the spacer, with what appears to be a spread bore carb...... so most of the fuel is coming from the secondary side of the carb.

[77cruiser]

421 sbc 9.8 cr
Ported Profilers,ported Vic.Jr, by Eric Weingartner
Straub cam 227/239/107 103ICL
Quadrajet
my homebuilt 421 headers

[BOOT]

Looks more like staining than reversion to me.

It’s mostly on the secondary side....... even in the spacer, with what appears to be a spread bore carb...... so most of the fuel is coming from the secondary side of the carb.

Yah looks that way to me to. I have a couple dual planes with signs of reversion in the intake, pretty even up the runners, doesn't make it to either plenum side(I know singe plane is not the same n prob worse). Still the heads were worse/darker than the intake.

[77cruiser]

I've never seen that color from pump gas before. What would be in it to make that color? A mile farther north I'd say colour.

[Geoff2]

Temperature related? [ Temp of the intake manifold itself ]. Would the colour be darker, nearer to black, if the intake was hotter/heat soaked?

[Ron Miller]

What size are the header tubes and what header flange?

[77cruiser]

What size are the header tubes and what header flange?

1 3/4 D port flange.

[Calypso]

PCV into the rear of the carb?

[77cruiser]

PCV into the rear of the carb?

No front.