Another how fast and horsepower guess - Ford Mustang Forums : Corral.net Mustang Forum
 
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post #1 of 5 Old 05-01-2012, 12:45 AM Thread Starter
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Another how fast and horsepower guess

Another what will it run. The 1st block is what I am running now and the 2nd block is what is being built at the machine shop right now. Just trying to figure out what it will run in the 1/8 mile and any guess about horsepower and compression ration. I do have a chance to get it dyno and am leaning more towards it just to learn what its putting out plus they will break in the motor for me.
71 mustang 100% drag only running 7.85 at the start of the year and 8.15 during the heat of the summer with the 1st motor..

Running a C4 with a 3500 stall
28x9 M/T Slicks
4.30 gear
3200 pnds


83 351w block .30 over
MSD 6AL,
MSD Distributer #8584
Edelbrock PERFORMER RPM 2.02" INTAKE VALVES #60259
Comp cam #35-246-3 519 lift intake, 523 lift exhaust
Cast Dish pistons
Stock Rods
Stock crank
Holly 750DP
Professional Products Typhoon


72 block 351w block
MSD 6AL
MSD Distributer #8584
Edelbrock PERFORMER RPM 2.02" INTAKE VALVES #60259
Comp Cam #31-330-3 534 lift intake, 534 lift exhaust
Professional Products Hurricane
Eagle Rods “ESP” H-bean connecting rods CRS5956F3
393 crank
Holly 750DP
Canton 7quart oil pan
1430200 PRW high flow aluminum water pump
1830201 PRW SFI flex plate
10833 M select blueprint oil pump
M6605A341 Ford Racing billet oil pump shaft
20 933 Canton windage tray
20 942 Canton windage tray installation kit
154 3603 ARP head bolt kit
138734 JE/SRP .030 pistons
90006 Pro Products SFI balancer
2M55005035 .035 Hastings moly race file fit ring set
8 CB831P Clevite rod bearings
MS981P Clevite rod bearing set


83 351w block .30 over
MSD 6AL, MSD Distributer #8584, Edelbrock PERFORMER RPM 2.02" INTAKE VALVES #60259, Comp cam #35-246-3 519 lift intake, 523 lift exhaust, 28in M/T slicks, Holly 750DP, Subframe connectors, Calvert complete rear pieces, 4.33 9in, hooker header, c4
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post #2 of 5 Old 05-01-2012, 02:04 AM
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I would guess you would gain about 80hp. maybe 7.30-7.40 1/8.

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post #3 of 5 Old 05-01-2012, 07:52 AM
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If I caught everything it looks like you gained 40 cubes, 10 more degrees in lift, and a windage tray. I say 40 hp, unless I missed something like you had the heads done?

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post #4 of 5 Old 05-01-2012, 11:04 AM Thread Starter
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Just having the heads freshen up. just matched to the gasket. Plus gaining compression. Any suggestion on what compression is going to be? I have heard from 11-13:1.

83 351w block .30 over
MSD 6AL, MSD Distributer #8584, Edelbrock PERFORMER RPM 2.02" INTAKE VALVES #60259, Comp cam #35-246-3 519 lift intake, 523 lift exhaust, 28in M/T slicks, Holly 750DP, Subframe connectors, Calvert complete rear pieces, 4.33 9in, hooker header, c4
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post #5 of 5 Old 05-01-2012, 04:35 PM
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I figured cubes alone about 40hp, then intake,cam, windage tray maybe another 15-20. I think your old piston is somewhere around 9.0to 9.5-1 your new piston about 11.0-1 one point in compression is about 3% so on a 400hp motor about 12hp so maybe another 20hp for the compression.
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