Next week I'm going to change my current setup to FI. I'm waiting the parts (pistons, cam, injectors ..)

(?)Bigger head unit means lower boost right? The detonation coming from high boost not big air flow right? So how is this F1-A in a street car? Anyone has any experience in a street car? BTW I was thinking going with D1SC.

My engine is 383cid and rods are 6.0" so I'm worried about reliability of the engine. Even my rods are Oliver and Crank is Lunati Billet, I will not trust my thin pistons. For that reason max boost will be 8-10psi not more.

Oh and there is no place who does dyno tune here so the only option for me is mail order tune. What about that ?

 

You dont need an F1A to make 8-10 psi on a 383. If you want more later on and get some dished forgings that have a thicker ring land on them, the f1a is the way to go.

 

I already ordered the dished pistons. The problem is 6.0" rods in a 383cid make the pistons weak, if I would have 5.7" rods that would be great.So you say there is no need to F1-A thats ok.

 

You should be able to make up to 15 psi in a 383 with a D1SC, if you want. I'm at 9 lbs with a 7.65" crank pulley and a 4.0" s/c pulley. The F1A can make about 6 lbs more boost than a maxed D1SC on the same engine.

 

I will not make more than 8-10psi because I don't trust my pistons. (the pistons in the order). As I said above 383cid with 6.0" rods is very bad combination for reliability of the engine.

What length rods you got?

With 9lbs how much power you got?

 

[QUOTE As I said above 383cid with 6.0" rods is very bad combination for reliability of the engine

Never heard this before, lots of guys are running 6.0" rods making big power...why is it a bad combo ?

 

I have been running an F1A on my street car for about 9 months now with no problems. Its not the huge blower that everyone thinks it is. The internal gearing is better because it allows you to run a bigger blower pulley and still have no belt slip. With a D1SC to make 15 psi you will need to use a 3.4 or 3.7 pulley. With an F1A you can make 15 psi with a 4.25 pulley. I'm making 15 psi with an SDCE 8rib setup with no belt slip.

The F1A impellor reaches out into the intake stream and really moves some air. Blowers use HP to make HP so this efficiency is important. I made approximately 50 more HP at the same boost level when I upgraded from a P1SC.

The F1A makes alot cfm in the lower rpm range so it is great for a daily driver. Later on you will want more boost and it will be just a pulley change away.

 

Thats what I wanted to hear. So is it possible to make more HP than D1SC with same boost level ? I'm thinking 8-10lbs for my daily car.

The another reason that I want the F1A, its because the bearing problems with the smaller ones.

 

Yes the bearings are better in the F series blowers. That is why they rate them up to 72,000 rpms. The impellor does not look as beefy as the P1SC and has many intricate curves. So I hope it will be durable. I'll bet if it inhaled a rock it would shred the impellor into a million pieces.

 

The pistons that will work with 6.0" are thinner than the pistons with 5.7" or 5.85". Yes there are some people who use this combo, but thats the truth.

 

You drive your car daily? I mean you can use it in traffic too? What is your MPG? I will use the same injectors but half boost.
Oh and do you suggest me to go with FMIC or the complete kit which ATI sells ?

 

I use it everyday in traffic and on the highway. I get about 14 city and 26 highway. I'm thinking of going to a smaller cam for better driveability and better mileage but the blower is perfect.

Talk to Lonnie Patvis or EPP for a basic kit without intercooler. I fabbed up my FMIC for less than 300 dollars and I would suggest that if you have the capabilities. Also talk to SDCE before you buy a bunch of procharger stuff. He is one of the most knowledgable forced induction guys I've ever talked with. Don't forget about the other stuff like the BigBlock ATI balancer and machining a spacer to get your procharger pulley to run true.