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Tech / General Engine Is your car making a strange sound or won't start? Thinking of adding power with a new combination? Need other technical information or engine specific advice? Don't see another board for your problem? Post it here!

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Old 10-08-2008, 11:19 AM   #1
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Join Date: Jul 2005
Location: Miramichi, NB
Posts: 1,424
Car: 86 Monte Carlo
Engine: Blown 489
Transmission: TH400
Axle/Gears: 9" 370s

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DYNO!!
DYNO TOMORROW!!!

any guesses what it will produce? before i post the dyno sheet and pics? complete specs are:

454 2 bolt GM block
eagle 4.250" steel crank
eagle forged 6.385" rods
srp forged 4.280 flat top pistons
crane z 244/256 .632/.632 114 blower cam
procomp 320 cc heads (titanium retainers, matching springs, manley severe duty valvs)
comp cam hi tech 1.8 roller rockers
weiand 871 blower 7-8lbs
2 x 800cfm barry grant blower carbs
csr electric water pump
gm 100amp alternator
hooker super comp 2" headers
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78 454 2 Bolt Eagle 4.250" Stroke, Eagle 4340 6.385" Rods, SRP Forged Flat Top 4.280" Pistons, ProComp 320cc Heads, Crane Z 244/256 .632/.632 Blower Cam, Weiand 871 Polished Blower, 2 x 800cfm BG MD Blower Carbs, CSR Electric Water Pump, Hooker 2" Super Comp Headers, TH400 Full Manul Reverse w/ Trans Brake, 9" Spool 370s.
Last edited by roughskinjrz; 10-08-2008 at 11:40 AM.
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Old 10-08-2008, 12:34 PM   #2
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Join Date: Jul 2008
Location: NE Ohio
Posts: 717
Car: 82 Z28
Engine: 406 + 91mm
Transmission: th400 t/b
Axle/Gears: S60 3.54's

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Re: DYNO!!
I'm guessing something close to 625rwhp, but I could be way off as I only really know small block stuff well. Seems like the trans/converter can really vary the dyno a ton also.
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Old 10-08-2008, 02:45 PM   #3
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Join Date: Feb 2003
Location: shawnee, ks
Posts: 711
Car: 87 Firebird
Engine: Wheeler 383 shortblock
Transmission: Th350 w/edge 3k converter
Axle/Gears: Stock 3.23, Zexel diff, T/A cover

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Re: DYNO!!
550rwhp/600rwtq?

Im not real familar with BBC and power numbers either. Has it seen the track yet?

Either way, Im sure its fun to take down the track, or drive around.
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Old 10-16-2008, 11:20 PM   #4
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Join Date: Jul 2005
Location: Miramichi, NB
Posts: 1,424
Car: 86 Monte Carlo
Engine: Blown 489
Transmission: TH400
Axle/Gears: 9" 370s

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Re: DYNO!!
it was an engine dyno and it made 815 horsepower @ 6200rpm and 742ft lbs tq @ 4900rpm.

i had to change from 1.8 rockers to 1.7 rockers because there was valve float from too much spring pressure. the blower backfired pretty hard, lol.
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Old 10-16-2008, 11:20 PM
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