Upgrade Path? Suggestions
Thread Starter
Burning Brakes
Joined: Feb 2004
Posts: 1,108
Likes: 0
From: over the water Cali
Upgrade Path? Suggestions
So i want to go a little bigger and badder. 427ci P1sc-1 3.6" pulley running 7-9 psi. AFR 225 heads compression is about 9.4:1. I have Andy's bracket.
I would like about 100more HP. So 725-760 rwhp.
I have a stndard 6 rib. Yah i know.
I was looking at just upgrading to the D1 but this would likely put it in the same place as the P1, ie 3.6" pulley at max rpm.
The other path would be to get an F1A and pulley down. Just don't know how big the pulley would be . Likely 4.1" or 4.2".
The other way would be to get an F1C but i do not know if it would fit Andy's bracket. Also running it at 725-750 rwhp may be a little low in its efficiency range.
Any suggestions?? Also is the noise that big of a difference between the units?
I am also going to low imp. injectors to improve idle with big injectors.
Also a 100000 btu fluidyne oil cooler is going in.
Thanks
I would like about 100more HP. So 725-760 rwhp.
I have a stndard 6 rib. Yah i know.
I was looking at just upgrading to the D1 but this would likely put it in the same place as the P1, ie 3.6" pulley at max rpm.
The other path would be to get an F1A and pulley down. Just don't know how big the pulley would be . Likely 4.1" or 4.2".
The other way would be to get an F1C but i do not know if it would fit Andy's bracket. Also running it at 725-750 rwhp may be a little low in its efficiency range.
Any suggestions?? Also is the noise that big of a difference between the units?
I am also going to low imp. injectors to improve idle with big injectors.
Also a 100000 btu fluidyne oil cooler is going in.
Thanks
Melting Slicks
Joined: Apr 2005
Posts: 3,418
Likes: 1
From: Chicagoland Area IL
Don’t know how much this will help… but when you look up specs on D1SC and F1A you’ll notice impeller inlet area increases (which indicates more target flow) but diameter is reduced thus requiring to be spun harder.
Don’t have any long term reports on how belt survives on F1A versus D1SC. If impellers where close to each other, then nod would go to F1A do to larger gearing stepup which intern would allow larger pulley thus more contact area.
Mike
EDIT --- F1A will work with your bracket but F1C will not.
Don’t have any long term reports on how belt survives on F1A versus D1SC. If impellers where close to each other, then nod would go to F1A do to larger gearing stepup which intern would allow larger pulley thus more contact area.
Mike
EDIT --- F1A will work with your bracket but F1C will not.
Last edited by Skunkworks; Mar 18, 2007 at 06:31 PM.
Life Time NCM #2196
Joined: Sep 2004
Posts: 82,582
Likes: 1,692
From: Converse TX
With the cubes you are running there is no reason to not goto the F series head unit. My little 346 puts down the power you are looking for with Andys orginal bracket and the DS1C head unit. I see 14 lbs at 6200 and a little more at 6800 and very seldom to I shift above 6k no reason to just beat on it as I have all the power for my current needs
Thread Starter
Burning Brakes
Joined: Feb 2004
Posts: 1,108
Likes: 0
From: over the water Cali
Thanks for the replys so far. I am leaning towards the F1A and later a 8 or 10 rib set-up if i want to go beyond 750 rwhp.
So the bolt pattern on the F1c is different than the F1A?? as per Mike at Skunkworks.
Thanks everyone!!!
So the bolt pattern on the F1c is different than the F1A?? as per Mike at Skunkworks.
Thanks everyone!!!
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Life Time NCM #2196
Joined: Sep 2004
Posts: 82,582
Likes: 1,692
From: Converse TX
Thread Starter
Burning Brakes
Joined: Feb 2004
Posts: 1,108
Likes: 0
From: over the water Cali
I talked to procharger and they said that the f1c and f1r would bolt up but would require additional mounting points. They said the one thing to watch out for is clearence.
From what they have also told me i can't see going with the F1c or f1r unless drag racing. They guy told me if i see 10# with the p1 then it will be about 14-16# on a D1 and 20-22# on a F1A with the same size pulley. You imagine getting north of 1.5 bar now thats 1000rwhp+.
Now i wonder what size of pulley to get. again not i am not trying to push-it right now.
Suggestions for 60-100hp gain?? 5", 4.75" OR 4.5"
the tep up 5.4:1 does help.
From what they have also told me i can't see going with the F1c or f1r unless drag racing. They guy told me if i see 10# with the p1 then it will be about 14-16# on a D1 and 20-22# on a F1A with the same size pulley. You imagine getting north of 1.5 bar now thats 1000rwhp+.
Now i wonder what size of pulley to get. again not i am not trying to push-it right now.
Suggestions for 60-100hp gain?? 5", 4.75" OR 4.5"
the tep up 5.4:1 does help.
Race Director
Joined: Dec 1999
Posts: 10,230
Likes: 885
From: Alexandria, Virginia, USA VA
how about that cool new pulley with the "one way" sprag. it's a cog drive setup but designed to allow backlash for street driving.
probably expensive, but I'm curious if there is any "mileage" on this setup or anyone has experience with it looks like a sharp idea to me.
with a mongo blower, you are putting alot of torq through that belt and shedding them is a bummer.
probably expensive, but I'm curious if there is any "mileage" on this setup or anyone has experience with it looks like a sharp idea to me.
with a mongo blower, you are putting alot of torq through that belt and shedding them is a bummer.
Former Vendor
Joined: Feb 2004
Posts: 10,876
Likes: 8
From: Las Vegas NV
St. Jude Donor '06 & '12
I had an F1-R on my 346, and it was VERY streetable. As a matter of fact, I felt it was more streetable than the D1.
I would opt for the F1-R and 8 rib pullies. You will be wasting your time going with a larger head unit and not changing your pullies out.
I would opt for the F1-R and 8 rib pullies. You will be wasting your time going with a larger head unit and not changing your pullies out.
