[ponchss]

Originally Posted by PackersFan26

How are you lost? Did you read his post? He said motor longevity would be a concern after 580 HP and fuel upgrades on pump gas..

He stated that reducing timing in order to run a smaller pulley would reduce longevity due to fuel limitations in the stock system. If you upgrade the fuel system, you would not have to reduce timing, thus not affecting the longevity of the engine.

[tireslayer0331]

Originally Posted by AL3X218

Do these Same numbers apply for D1SC as well? Shooting for around 650whp with a methanol setup as well. Trying to decide if I need to go ahead and swap pulleys.

Bumping this, I am about to install my D1SC kit next month and would like to know what size pulleys produce what PSI/power levels.

[Perdieu]

Originally Posted by ProCharger

What is your combo?

3.70" = 11psi (but will need meth) ~650+ rwhp
3.85" = 9.5psi (but will need meth) ~600+ rwhp
4.13" = 8psi ~550-580rwhp

The 4.13" is pretty much the last pulley the factory fuel system can hang on with.
Plus is right at about the point of "diminishing returns" as far as power goes if only on pump gas.
(octane limit)... after that you have to reduce timing, which in turn affects how the D/I injection works, and not a lot of good idea for motor longevity.

Hope this helps.

Originally Posted by PackersFan26

How are you lost? Did you read his post? He said motor longevity would be a concern after 580 HP and fuel upgrades on pump gas..

Umm yep still lost on what you read into his post.

[ProCharger]

Originally Posted by AL3X218

Do these Same numbers apply for D1SC as well? Shooting for around 650whp with a methanol setup as well. Trying to decide if I need to go ahead and swap pulleys.

No, those numbers do NOT apply to D1SC's.

I haven't personally used a D1SC on any stock motor'ed LT1.
Since there is little to no reason for it, when a P1SC1 is more then enough.
Anything less then 750rwhp, might as well have the P1SC1.

I was speaking on results from cars I have personally tuned.
As very repeatable packages.

Originally Posted by PackersFan26

So really there's no ProCharger system that can produce over 600whp in a reliable manner long term for our cars even after upgrading the fuel system?

That kinda sucks

Has nothing to do with "ProCharger"...goes for all Forced induction.
Anything more then 7-8psi on these cars stock is playing with fire.
Not everyone in the country gets the same quality fuel.
Not everyones HPFP and LPFP is exactly the same, etc.
So the numbers I am talking about are not "one hit wonders, or hype"
But solid real world, all day everyday numbers.

Originally Posted by JoeAyalaM

The D1 can do 800 HP easy, but that is beyond the stock engine and fuel system limits.

D1SC's have been proven time and time again for almost 900 wheel HP.
Guys that put them on engine dynos have made well over 1,000 HP.

We however rate them at 925hp worth of airflow at the max RPM.

Originally Posted by tireslayer0331

Bumping this, I am about to install my D1SC kit next month and would like to know what size pulleys produce what PSI/power levels.

The pulley size would have been ordered by your selling dealer.
We try and get it as close as possible to their request.
(given the variables, such as altitude, engine rpm, modifications, etc)

[Joe's_cool_1le]

Just realized that my shop that ordered my Whipple also ordered a 3.375 pulley. With only mods out the gate would be to fab an airbox. LOL.. Guessing from I just read we won't be using during the first stage of this build.

[ProCharger]

Originally Posted by Joe's_cool_1le

Just realized that my shop that ordered my Whipple also ordered a 3.375 pulley. With only mods out the gate would be to fab an airbox. LOL.. Guessing from I just read we won't be using during the first stage of this build.

I don't see the correlation between the whipple pulley size, and the procharger pulley size. Am I missing something here?

[Joe's_cool_1le]

Originally Posted by ProCharger

I don't see the correlation between the whipple pulley size, and the procharger pulley size. Am I missing something here?

Sorry about that. I'm not that familiar with F/I and had reacted quickly on my thought. I thought the logic was the same but please disregard. I do see now that this was equipment specific.

[GirlyNFG]

Originally Posted by AL3X218

Do these Same numbers apply for D1SC as well? Shooting for around 650whp with a methanol setup as well. Trying to decide if I need to go ahead and swap pulleys.

I have a D1 with a 3.9 making 715-800 depending on dyno (LOL) at about 11.5-12 lbs. I still have fueling issues so all dyno pulls have ended about 6300. Except for the one that saw 806, that pull was higher and it made 13lbs