85 Monte Carlo SS build

[shownomercy]

Just bump line pressure and voila, bigger injectors. I had to do that with my 80#s at LT1 rail pressure.

[dawdaw]

I think I'm going to max out around 12#. Looking at putting doing away with the factory bypass valve and doing a blow off valve located in the charge piping. The factory one isn't working right with the throttle body on the intake

is it already pullied all the way down?

Just bump line pressure and voila, bigger injectors. I had to do that with my 80#s at LT1 rail pressure.

yes, only to a point.. low end $ injectors can malfunction with high pressure, when i order my new ones i plan on getting around a 40ish at stock pressure and have them flowed at around 65-70psi..

I think Moran's are like rated out of the box at 100psi

[shownomercy]

Mine seemed to be happy at 55-60 base psi, so with 10psi of boost, they see I guess 70 area.

[dawdaw]

Mine seemed to be happy at 55-60 base psi, so with 10psi of boost, they see I guess 70 area.

which injectors?\

[firebird_1995]

I've got the smallest pulley I can get on the sc and a 8" crank pulley. I don't trust the factory bypass valve is holding so I may see more.

[shownomercy]

which injectors?\

Siemens dekas or something

[dawdaw]

I've got the smallest pulley I can get on the sc and a 8" crank pulley. I don't trust the factory bypass valve is holding so I may see more.

got any pictures of the bypass valve you're talking of?

[firebird_1995]

The valve is on the top of this picture. Its got a 1 3/4" butterfly controlled by that actuator on the left side of the case in the picture at the top. It just allows the pressurized air to exhaust to a chamber on the intake side of the blower. I want to dump to atmosphere

[dawdaw]

Is that what guys that run these blowers that are wanting to push it do?

[firebird_1995]

No. The way the vacuum operates it is different from the way they do it which is why its not working for me. They run the throttle body on the inlet of the sc and as much as I've tried, I just can't get it to run like that. With the piping and intercooler it just has too much plenum volume and there is no control at idle. They source the vacuum for the bypass in between the tb and inlet of the sc, it never sees boost in the factory application. Running my tb on the intake the only source I have is intake vacuum which sees boost. Because of that the valve has no middle ground. Once it sees 10" of vacuum it begins closing, which brings in the boost, which then slams it closed. Theres no adjustment on it as to when it begins closing. Its a bitch on the street, pretty much all or none. By running a regular bov I should be able to adjust it to close at a lower vacuum and make it a little more streetable. I think by letting the stock bypass see pressure on the diaphragm it may be ruptured