Help With Initial Setup

[Gtrpunk23]

Soo...it's finally time to run my motor and I need a little help with the initial setup. My engine builder is very good but he isn't incredibly familiar with prochargers and blow through. I built a 422 with 8.5 to 1 compression, mildly ported eldelbrock heads and an F1 procharger. I am loooking to put 16 pounds or so into the motor. The setup is intercooled and is pumped through an 850 holley built for blowthrough. The questions I have are in regards to the Blow Off and Initial Carb setup. I would like to run the motor late next week, my builder and dyno are available so that'd be ideal.

1) I was given one of the big red procharger bovs when I purchased th head unit. How are these performance wise? Will it work with this application? Don't know the part number off hand. Also where is the best placement for it? Close to the hat no?

2) Also I need to get a rough idea of how to baseline this carb/fuel system. Any suggestions or people to talk to would be much appreciated.

Sorry for writing so much tried to keep it to just the necessities. Thanks in advance,
Chris

[Gtrpunk23]

No one's got anything????

[big_G]

OK...here we go: Procharger has most of your answers on their website, but I'll answer them here. The red surge valve is great. I have the lesser black one. It is best placed before the intercooler, but mine is after it. The carb. jetting should have the primary and secondary jets set up about 4 jet sizes larger. During the dyno sessions you can optimize them. The carb. needs the large needle and seats to aid flow. If the carb. has been modified for blow-thru, this should be already done. Make sure your fuel system is up to the task...I recommend an Aeromotive A-1000 and boost referenced regulator as a minimum. Good luck...sounds like a fun build.

[MrForce]

What, if anything, do you have for timing control? Are you retarding under boost or limiting total timing?

[H2Ogbodies]

For timing, I would suggest the Mallory Digital Hy-Fire 6 which has boost referenced controls via a MAP sensor. I've used them before with boosted builds and they work very well and are easy to adjust. You can adjust timing 1/10 of a degree at a time plus it has the ability to give you an aux. timing retard and start retard. For ease of use, go with an aftermarket dist. which has just two magnetic pick-up leads.

[Gtrpunk23]

I have an A1000 on the shelf that my dad bought which I plan to use...for ignition I will use an msd digital 6 which I have to order first thing this week, unless someone advises against that...the carb is built already but the jetting info is what I needed. The last piece to the puzzle is the regulator...I haven't had too much experience other than what my dad's used which has all been aeromotive...haven't seen any issues...any reason not to stick with them? Also you're saying to go 4 sizes up from what the motor would run N/A? Also can you explain if possible why it is better to have the bov before the intercooler?

Thanks so much, this info is all greatly appreciate.

[camcojb]

the best money you'll spend on that combo is having the carb set up by a pro for blow through. It is completely different mods than any other application. Do not think that jetting up, solid floats and bigger needles/seats will be all that's required. To make it work right I've always had to have metering block mods, air bleed mods, and in most cases different boosters. Once set up correctly they run fantastic. Very frustrating in almost all cases if you try to save money on the carb.

Jody

[big_G]

Procharger recommended the surge valve be placed before the intercooler, perhaps to reduce heat soak into the intercooler. When I was running a blow thru carb. (Holley 750 dbl. pumper) I used the appropriate Aeromotive boost referenced regulator. As far as the jetting up, this also came from the Procharger site. My carb. mods were limited to a Pro-form main body, solid floats, .130 inch needle and seats, larger squirters and larger jets (I don't remember the final sizes). This yielded good mixture throughout the rpm range, a little rich at upper boost for safety.