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351W Combo? Look Strong?

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Old Jul 1, 2008 | 07:37 PM
  #1  
69fstback's Avatar
69fstback
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Default 351W Combo? Look Strong?

Im new here and wasnt sure if i should post here or not.

I have a 1969 mach 1 here is my combo i just built how does it sound?

69 block 40 over
10.1 compression
dart pro 1 195cc 2.02intake/1.6exhasut flow 285@600intake 185@600exh
roller rockers 1.6
comp extreme enegry XE294H flat tappet
@50 250in/256exh
advertised duration 294int/306exh
lift 554int/558exh
victor jr intake
700holley Dp
electric water pump drive
msd 6a
9 qrt oil pan with windage tray and baffles and crank scraper
march performance ration pulleys (just have an crank and alternator pulley)
electric fan
small headers 1 1/2 flowtechs with pypes 2.5 exhasut

all this with a c-4 with 3000 stall speed and a 9 inch with 3.89 gears

How does this sound for a street/strip. (only driven to local shows and track)

Thanks in advance[/align]
Old Jul 1, 2008 | 07:54 PM
  #2  
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69fstback
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Default RE: 351W Combo? Look Strong?

Forgot to ask if you can give me some hp/trq out of this combo Thanks
Old Jul 1, 2008 | 08:41 PM
  #3  
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Waffles
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Default RE: 351W Combo? Look Strong?

i think the 700 holley might be overkill. everything else sounds good.
Old Jul 1, 2008 | 08:52 PM
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my77stang
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Default RE: 351W Combo? Look Strong?

i think that 700 would be fine with those heads, cam, and compression.

should run like a raped ape, lets see a video clip of that thing running!
Old Jul 1, 2008 | 09:45 PM
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Default RE: 351W Combo? Look Strong?

YA i will get a video for you guys. Hoping it runs real strong to show the chevy guys around here whos boss
Old Jul 1, 2008 | 10:21 PM
  #6  
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Default RE: 351W Combo? Look Strong?

I might even consider a bigger carb. I've ran a750 holley on a 351W not as strong as this one, and it ran really good. Even better than the 600 I took off. Don't be afraid to move up to a 800 or 850dp if the top end seems weak.

With that combo, you'll make excellent top end power. Your effective cylinder pressures will be a little high. But with that cam nothing terrible. Except on a hot day, it should run good on pump premium.

You won't have much bottom end. It will idle well at about 1000-1200. A bigger carb may need a higher idle.

With a hydraulic cam, it won't run over 6,200. Depending on the parts you chose, maybe not even that high. I suggest Comp Cams beehive springs. That gives more stability and adds a couple hundred rpm's on the cyclotron. I'm curious why you didn't go with a mechanical cam? All the other parts should make power to 7,000 or so.

Old Jul 1, 2008 | 11:13 PM
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Default RE: 351W Combo? Look Strong?

We are running a similar but different setup on our 408....

210 Vic Jr. Heads
Air Gap Dual Plain intake,
11 to 1
750 DP
Very similarcam in a roller version

I think we are running about 500 HP & TQ or so at the FW, I wouldguess your combo might be a littlebetter on the top end..
Old Jul 2, 2008 | 12:17 AM
  #8  
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valley firearms
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Default RE: 351W Combo? Look Strong?

bigger carb and bigger headers will make her run better. Those 1 1/2" tubes are not letting it breath like it should.
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Old Jul 2, 2008 | 12:18 AM
  #9  
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valley firearms
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Default RE: 351W Combo? Look Strong?

You also may want to invest in a rev limiter. The 6A doesn't have one but you can add one to your system.
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Old Jul 2, 2008 | 04:22 AM
  #10  
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69fstback
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Default RE: 351W Combo? Look Strong?

I am gonig to inviest into a carb and header. What size header should i look at 1 5/8 or What? Thanks



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