Just got back from the dyno...

3

358stroker

Founding Member

Apr 25, 2001

62

0

0

Austin, TX

Jun 29, 2006

#1

• Jun 29, 2006

• #1

At 4700RPM on a Mustany Dyno it laid down 424HP and 476TQ
I ran out of fuel at 4700RPM, so now I need to figure out what to upgrade on the fuel system:
This is what I have now:
331ci
all the bolts ons
vortech A trim 8-9lbs
vortech fuel rails/SX regulator
255lph intank pump
38LB injectors, no FMU

I was planning on 50lb injectors and maybe an inline pump and hope that does the trick?

Any suggestions

 

Blk91stang

Member

Jan 3, 2003

607

0

16

North Brunswick, NJ

Jun 29, 2006

#2

• Jun 29, 2006

• #2

358stroker said:

At 4700RPM on a Mustany Dyno it laid down 424HP and 476TQ
I ran out of fuel at 4700RPM, so now I need to figure out what to upgrade on the fuel system:
This is what I have now:
331ci
all the bolts ons
vortech A trim 8-9lbs
vortech fuel rails/SX regulator
255lph intank pump
38LB injectors, no FMU

I was planning on 50lb injectors and maybe an inline pump and hope that does the trick?

Any suggestions

Click to expand...

42# or 50# and an inline pump should defiantly take care of you. I just ordered a Procharger Inline pump to make sure I don't have the same problems. If this doesnt do the trick, bigger feed and return lines is the next step so its worth a shot.

What size pulleys are you using on your A-Trim and what kind of Heads and Cam are you running. Those #'s are EXTREMELY impressive for under 5,000 rpms (I'd be happy to have those numbers @ 6,000rpm when I get my 331 installed )

 

3

358stroker

Founding Member

Apr 25, 2001

62

0

0

Austin, TX

Jun 29, 2006

#3

• Jun 29, 2006

• #3

My vortech pulley is a 2.95 and 7" lower, 8-9lbs of boost, old trick flow heads

I really don't want to upgrade to bigger feed and return lines if I don't need too...

 

D

Daggar

New Member

Jul 19, 2004

3,902

5

0

Jun 29, 2006

#4

• Jun 29, 2006

• #4

I don't think you're going to need to upgrade the feed lines. I don't think you're even going to need that inline pump. The 42# injectors and tune shoudl take care of the whole deal at that HP level.

I haven't looked into it lately, but the last time I did, the 50# injectors were low impedance (different than that of 42s). If that is still the case, you're not going to be able to just slap em into your injector harness and ride on.

 

3

358stroker

Founding Member

Apr 25, 2001

62

0

0

Austin, TX

Jun 30, 2006

#5

• Jun 30, 2006

• #5

They make 50Lb injectors that are high impedence.

 

Blk91stang

Member

Jan 3, 2003

607

0

16

North Brunswick, NJ

Jun 30, 2006

#6

• Jun 30, 2006

• #6

looking at my personal dyno graph, from 4,800rpm to 6,000rpm I gained 60rwhp. Because we have somewhat similar combo's, would this mean your going to be about 490rwhp?

I have a stock cam and stock ported heads, and still made peak power at 6,000rpms so I would think you would too at the very least.

That's an amazing amount of power from an a-trim combo if my theoretical calculations are all correct.

 

3

358stroker

Founding Member

Apr 25, 2001

62

0

0

Austin, TX

Jun 30, 2006

#7

• Jun 30, 2006

• #7

To be honest it made more power than I thought it would, I suppose that's a good problem to have!!

I'm just really struggling with knowing if the stock feed/return lines are big enough to support more RWHP since I will make more power.

 

Blk91stang

Member

Jan 3, 2003

607

0

16

North Brunswick, NJ

Jun 30, 2006

#8

• Jun 30, 2006

• #8

I just realized your spinning your supercharger about 6,000rpms higher than I am. I'm kinda glad now I could up my crank pulley and still get some more cfm out of it.