NWB300

I have a 05 gto with a 403 that I'm putting a F1-D procharger on. It has ls3 heads that are ported and milled .030 with a ls3 intake. The motor is forged and compression is 11.15. My goal is 700-750whp through a stalled 4l80e. Cam is a custom grind 236/246 .615"/.620 113+2. I plan on using E85. My question is what psi would i need to achieve my goal and should I worry about pushing water with the deck thickness issue I read about with ls3 heads. If that's an issue would switching to a set of ported 317 heads and a different cam be a better option? How about LSA heads with the same cam??? Any input is appreciated. Thanks!!!!

Bob@BruteSpeed

iTrader: (16)

12 psi should get you to your goal with your current combination and E85, and I don't see you having any problems pushing water, even though your LS3 heads have been milled. Bob

NWB300

Thanks for the response Bob. I didn't think it would be much more than 10 psi with e85. Do you think I'm leaving anything on the table with this cam? It was for my N/A application. It's a bullet custom grind.

Rise of the Phoenix

iTrader: (27)

How does the F1D compare to the F1A, F1C, and F1R? Never heard of the F1D before.

conan

iTrader: (5)

https://www.procharger.com/superchar...arger_models=1

Look at the CFM chart and compare the different models.

Bob@BruteSpeed

iTrader: (16)

That doesn't look like a bad cam profile for use with the blower, I'd use it. Bob

Bob@BruteSpeed

iTrader: (16)

The F-1D brings in the boost sooner than an F-1A, but it won't make as much boost up top. Bob

NWB300

Thanks again Bob. That saves me work and money. Like Bob said the F1-D gives you better down low and midrange power but lacks the top end. Im building a street car so making peak power at 6k doesn't benefit me. My car will see the track once. Get kicked out and probably never go back. lol It runs low 11's N/A.

The Alchemist

iTrader: (19)

I have a 416ci with an F1A, and trust me, it comes in pretty damn hard down low. At 3000rpm, it already makes ~540rwtq, and by 3500, it's at 640ft/lbs, and by 4000rpm, it hits 700ft/lbs of torque. Trust me, even with 3.42 gears, and 305 R888s, it will spin the tires in third gear at 4000rpm.

NWB300

Dam Alchemist!!! Can I get more info on your setup?

Pimpium57

iTrader: (104)

A friend made a LOT more than 750rw on this supercharged 416" LS3 with milled LS3 heads, and like you was also OVER 11:1 CR. Keep them.

The Alchemist

iTrader: (19)

My setup consists of a 416ci ls3 block, forged rotating assembly from Thompson Motorsports. Cam is a 237/255. Heads are Performance Induction, which became MAST, with some work done to them.
Msd intake manifold. 1 7/8 headers, 3.5" stainless works catback.

That dyno was actually in the low timing mode at only 14 degrees of timing.

Firehawk441

iTrader: (41)

F1d will make quicker power then an F1A like Bob said.
Much better head unit on a street car.
I've built cars that make 70whp less with F1D's and will run circles around the F1A.

NitrOmm

iTrader: (1)

Can you share a Dyno chart ? It would be interesting to see the TQ curve as a comparison.

Firehawk441

iTrader: (41)

qSorry. I do not save dyno sheets.
I can tell you its a true apples to apples comparison.
Both C5's and both same engine combo.

There is no question an F1A will make more HP.
On the track, the A should be faster then the D.
On the street, I like the D much more.
I like how it accelerates in higher gears as well.

The two just make power differently.

The Alchemist

iTrader: (19)

That's interesting. I couldn't imagine my car hitting any harder down low. Maybe it's my specific combo, but it hits really hard even at 2500 rpm.

The Alchemist

iTrader: (19)

Here's my current combo (F1A/416ls3) compared to my last combo (D1/347) and you can see that it is not soft down low. I can only imagine how much harder a F1-D could be. I still only have a 4.00" head unit pulley on it, so there is still more left in my blower.


Yes, the tires started to spin on the dyno at 4000rpm, and caught up and hooked back up around 5000rpm.


...and that pull was with me in the low octane table due to me being stupid and messing with the knock sensitivity and turning them up way too high. So even at low timing, and rich afr, it still made killer torque.



Again, maybe it's my combo. The cam is 'smallish' for my cubic inches...oh and the 416ci helps as well. I have cathedral port heads too, with small'ish chambers and runners.

I love my setup.

Detoxx03

iTrader: (14)

700-750 is easy for a F1D.

The Alchemist

iTrader: (19)

I made 760rwhp with a d1 and 347 combo.

Firehawk441

iTrader: (41)

With out driving both it would be difficult to understand how less HP feels like more in all gears.

Low gear is irrelevant including a D1SC. They will all melt the tires in low gear.
No special combo required.