D1X vs F1A

[1LE_Justin]

Hey y'all,

First time going FI after getting a cam, any thoughts or recommendations between a D1X or F1A procharger on a stock ls3 block? Just looking to do an Ultra Street and occasional drap strip passes on street tires.

Thanks ahead of time!

[RupertPupkin]

Depends on what ur end goal is with power. D1x is plenty for a street monster with your occasional track days.I chose the ecs 1500 originally, but now I always toy with the idea on going bigger 2200x.

Happy hunting. Boost is lots of fun, and gotta pay to play if shit hits the fan.

[acammer]

Originally Posted by 1LE_Justin

Hey y'all,

First time going FI after getting a cam, any thoughts or recommendations between a D1X or F1A procharger on a stock ls3 block? Just looking to do an Ultra Street and occasional drap strip passes on street tires.

Thanks ahead of time!

I have some relevant personal and business related experience I can share here, having helped build or tune several combinations using the LS3 and the blowers you mentioned.

Essentially, if you're staying with the stock bottom end, the F1A is not appropriate, and will hamper your ability to produce a broad power curve reliably. It's simply too much blower for the power level, and even when dramatically pulleyed down it still wants to soar past 800whp on a decent motor combination. So, the result is a fairly narrow power curve that you have kneecap just as it's getting into the range where the blower really wakes up because it exceeds the power capabilities of the SBE. ProCharger shares this opinion, having discussed it with them on a few occasions.

800whp is a good practical limit to keep yourself under for something you want to live a long, healthy life. Certainly guys have made 1k+ whp on SBE LS3s, but those are not expected to last multiple seasons or even multiple passes - it's asking for trouble.

The D1X is a better fit, but again, I would argue that for a SBE build, it's not the right blower. A D1SC is perfectly capable of producing 800+whp on a SBE LS3 with a good camshaft, and it will do so with a better power curve than the D1X. The D1X gives up power in the low and mid-range in order to achieve a strong top end on the last 20% of the curve. Which, if you're already maxed out on a D1SC and need a little more for a hardcore race application, is a sacrificing worth making. In your case, the D1SC will give you all you need, and do it producing better power through the rest of the curve.

Here is a thread on a F1A car I recently tuned and dyno'd. It makes the power goal of 800whp, but it does it with a pretty peaky, narrow curve, simply because it's only just starting to tap into the blowers happy place. You want the blower to be happy where the engine is happy, and the D1SC is a great match for the SBE LS3.

https://www.camaro5.com/forums/showthread.php?t=625804

The Novi 1500 blowers are similar to the D1SC, and do great as well. We carry both ECS (with the 1500) as well as Procharger here at GPI.

[ss camaro-monte]

Just be prepared for the upgraded axles and diff, much bigger injectors fuel system etc that you will likely need.
Andrew is right the d1sc I have seen on several cars and they are tried and true ecs as well.
You are going to get beyond the limits of the stock block with those big blowers. Better power curve with smaller blower.

Hell there are guys on here with zl1s with lsas running 700rwhp and could do more if they wanted to. Do a search all with 1.9 l blowers pull big numbers when done right. Your not even into Whipple or kong upgrade. Smaller centrifugal or roots style in my opinion. It gets to the point where the power isn't the hardest thing to make but keeping it all together after you get to big boy numbers.lol

[Batmanntexas]

As previously mentioned, you will definitely need a fuel system...if you don't already have one. However, if you stay on street tires (no drag radials or super sticky street tires) you can continue to use your factory axles without fear. I am STILL on the stock axles, driveshaft, and just recently finally found the limit of the stock clutch on my application (slips in 4th under aggressive throttle).

ACammer has given you some really solid advice, as per usual from him.

-Scott

[1JEWLDSSRS]

Originally Posted by acammer

I have some relevant personal and business related experience I can share here, having helped build or tune several combinations using the LS3 and the blowers you mentioned.

Essentially, if you're staying with the stock bottom end, the F1A is not appropriate, and will hamper your ability to produce a broad power curve reliably. It's simply too much blower for the power level, and even when dramatically pulleyed down it still wants to soar past 800whp on a decent motor combination. So, the result is a fairly narrow power curve that you have kneecap just as it's getting into the range where the blower really wakes up because it exceeds the power capabilities of the SBE. ProCharger shares this opinion, having discussed it with them on a few occasions.

800whp is a good practical limit to keep yourself under for something you want to live a long, healthy life. Certainly guys have made 1k+ whp on SBE LS3s, but those are not expected to last multiple seasons or even multiple passes - it's asking for trouble.

The D1X is a better fit, but again, I would argue that for a SBE build, it's not the right blower. A D1SC is perfectly capable of producing 800+whp on a SBE LS3 with a good camshaft, and it will do so with a better power curve than the D1X. The D1X gives up power in the low and mid-range in order to achieve a strong top end on the last 20% of the curve. Which, if you're already maxed out on a D1SC and need a little more for a hardcore race application, is a sacrificing worth making. In your case, the D1SC will give you all you need, and do it producing better power through the rest of the curve.

Here is a thread on a F1A car I recently tuned and dyno'd. It makes the power goal of 800whp, but it does it with a pretty peaky, narrow curve, simply because it's only just starting to tap into the blowers happy place. You want the blower to be happy where the engine is happy, and the D1SC is a great match for the SBE LS3.

https://www.camaro5.com/forums/showthread.php?t=625804

The Novi 1500 blowers are similar to the D1SC, and do great as well. We carry both ECS (with the 1500) as well as Procharger here at GPI.

As always Andrew,great advice! You da man!!!