MikeC5Vert

iTrader: (3)

Hi,
I got D1SC with LQ9 6.0L heads, 224/228 581/588 114 lsa cam, and 4.10 gear.
What boost at 3000 rpm and 4000 rpm since those are the range I cruising around town?
Thanks so much in advance!
-Mike

Avengeance

iTrader: (4)

Which balancer are you running? Also... at cruising it wont be making any boost. Its really hard to tell what boost youll make.

T/A KID

iTrader: (12)

I don't know if this will help, but I have a 7.65 crank and a 3.2 BP on my LTX setup and I start making boost at 2400rpms.

Judging by that I am spinning the blower at 23.5 thousand rpms. So I am assume thats when a D1SC starts making boost, or on my setup anyways.

MikeC5Vert

iTrader: (3)

I got a C5 vette with stock balancer. I understand that cruising will not making any boost but I meant when I change gear and step on the gas pedal to go around 3000 - 4000 rpm ... what kind of boost I'm seeing ?

-Mike

MikeC5Vert

iTrader: (3)

That is great to hear that it start making boost at 2400 rpms.
Thanks!

-Mike

9sectruck

iTrader: (9)

if your belt is not slipping at all (6rib?)I would say u should be making around 5-7 at wot going into the 4000 rpm on bone stock heads

Jimmy P

iTrader: (177)

That blower pulley should max out the D1SC.

MikeC5Vert

iTrader: (3)

Hi, what do you mean by max out?
Thanks,
-Mike

JMBLOWNWS6

iTrader: (17)

He means you will spin the blower to its full capacity.

T/A KID

iTrader: (12)

The D1SC can be "Safely" spinned to 62,000rpms. With my combo it maxes out the D1SC at an early 6300rpms, I rev to 6200.

firehawk123

Is the Cubic make any diffrent with boost .. if the have supercharger D1SC with 350ci and its making 10 PSI and i change to 408ci it should make more boost or less boost or the same boost if am using the same pullys .

EPP

iTrader: (22)

The boost will go down, Jassim. The reason is you have more volume to fill. Bob

EPP

iTrader: (22)

Mike, there are so many variables which make it really hard to predict how much boost you will make at any given rpm.
How much boost the blower can produce depends on many variables.
* Cubic inch. The larger the engine the less boost it will make with a D-1SC.
* Headers and exhaust. A better flowing system will produce less boost, requires a smaller pulley to regain the loss in boost. Ultimately though, more power will be gained.
* Camshaft and heads. A camshaft with some overlap will leak out some boost through the valves. Better flowing heads react a lot like a better flowing exhaust system.
* Altitude. Elevation plays a big part in how much boost is produced. Those people living in the higher elevations have to spin the blower harder to see boost.
* Condition of engine. An engine with real good sealing rings will ultimately produce more boost than one with worn rings.
* Rpm. An engine that is spun up higher in the rpm range will normally produce more boost. Bob

MikeC5Vert

iTrader: (3)

Thanks so much guys!!!

-Mike

firehawk123

Thanks bob . its really good info .

EPP

iTrader: (22)

You're welcome! Bob

Mark98SS

iTrader: (1)

I have an opportunity to pick up a 418 9:1 motor, will that be too big for my D1SC? If I can get it to run as well or a little stronger as my cam only 346 did at 7psi I'll be happy.

T/A KID

iTrader: (12)

Go for it that will work great with a D1SC. Remember that blower is rated at 925hp/1400cfm. You'll most likely make less boost on the Bigger ci motor but thats just because its more efficent.

I'd take a motor that made 10lbs=700hp, then one that did 20lbs=700hp.

Urban Legend

iTrader: (5)

Please explain this reasoning.

EPP

iTrader: (22)

No, not at all, check this build out.
http://www.exoticperformanceplus.com...Car.php?car=42 Bob