Well I'm really ready to raise the bar on my setup but can't get a grasp on the proper size unit. Figured I want to go up to 8 to 10 psi on my Sig setup.
406, 10.5 to 11:1 which is a bit high for a starting point.
heat and timing detonation will be my enemy for sure. Cam can change also if needed.
not thinking intercooler yet but possible future.
Have HSR but would consider single plane TB with carb hat but for now stay with the current.
not running serpentine and will have to low mount alternator on passenger side because of AC unit on other side.
anybody can lend an opinion or suggestions, I'm all ears.
TIA,
John

 

 

I would definitely go D1 at a minimum. My V3 is comparable to a P1 and I'm getting 6psi on stock pulley with a heads/cam 350. Looking back i wish i went V7 Ysi. Your compression is pretty high though so like Orr said, your gonna have to address that first. A friend of mine is getting 13 lbs out of his D1 on a cam'd LS3 without the air filter. With the filter it runs 11/12lbs

 

Remember that a supercharger's cfm is fixed between the two pulley's and RPM, so base your selection on how much your engine is already taking in naturally aspirated, and compare it to whatever map Procharger releases for the individual unit. This will help you determine your supercharger selection without needing to max out a smaller one like the P1SC to keep up with your engine...

Invest in MLS gaskets to lower compression, don't waste your time otherwise unless you go E85...

Vanilla Ice put out a boosted code for $8D, might save you some money before investing in an aftermarket unit. Something to consider since you're running the '7730 already...

- Rob

 

Thanks for the responses, the boosted 730 code is what put me back in the dream of boosting. Code should be workable with my setup.
I have much to research as this may take a full rebuild and configuration change. I am concerned with using thicker head gaskets to reduce the compression as the thickness could become problematic with boost on the 400 block.
already at 0.060 with 200 cc head to get comp down a bit. Between that and hyper pistons, a new rotating group would build a more boost friendly motor so timing will not need to retard as much.
Maybe I start with a 5-6 # setup which to me does not give the benefit for the $ I'm looking for and change drive ratio as the motor is reconfig later.
I'm sure hindsight will tell me that was the wrong approach but will ease the feeling of building a whole new setup.
Just feels like I should be able to slap one on and deal with code and fuel issues.
Not the case. This current build is good for N/A, Will keep researching and find a unit to fit.

What boost ranges are you guys running and if you feel like you run the size unit hard or easy for the rpm range?
Jp

 

 

 

I think he'll be okay with the 400-SBC at low to moderate boost levels. Local guy had built a 403 Oldsmobile also with siamesed bores, boosted it safely to 600 horsepower. But yeah I could see why most would be concerned about that...

- Rob

 

I do have an 87 roller 350 sitting here, maybe start another stroker build with that instead. Hmmmm...

 

 

You must be getting stupid belt slip or something. I ran an S-trim on a 355 years ago and I pegged a 2-bar map sensor with it. Your V3 is very similar to the S-trim impeller.

-- Joe

 

That makes me feel great. My 400 is .060 over.

-- Joe

 

V1 or V2 S trim? What was your pulley combo? im running a 6.0 crank and a 3.25 blower.

 

I think Vortech had a little pity for the SBC, as they are still making 7" crank pulleys with both the SBC and Ford bolt pattern. Vortech does in fact make an 8" crank pulley for the Ford, and being that their 7" crank pulley can be shared, I'm assuming the 8" Ford crank pulley can be drilled for the SBC pattern, which will help get that boost up. It's very costly though. There was a guy on the Corvette boards, Joe you might know him, who used to make an 8" crank pulley for the SBC as well, not sure if he stopped. Think his name was Brian, I don't remember to be honest...

- Rob

 

V1 s. 3.33 SC pulley and a stock crank pulley, which is almost 8" I think? The fbody kit used a stock sbc fbody serp crank pulley with a spacer .

You are running the big aluminum crank pulley with multi bolt pattern, huh? I'm running the 8" version now, and a 3.33 on my t-trim. Makes like 6psi by 3k and the tires burning lol.

 

 

Yep, hopefully the end of this year i will be switching to a 10 rib setup with a 7.8" crank pulley. Gonna need to modify the radiator outlet and possibly alter/remove the front sway bar. hopefully wont run me more than $6-700 to do it.Belt slip on the current 6 rib sucks. Wish they made a 8 rib universal crank pulley but they only make 6 or 10 for sbc/lsx.

id love that. how much boost at 6K?

 

I don't know, the tires break loose at 3k.. I probably need to dyno tune it a bit then trailer it up to the track.

-- Joe