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Proven Engine Combinations Engine combinations, and the resultant HP and/or E.T.s

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Old 02-06-17, 02:56PM   #1
ta man
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Default 600hp plus 455 street engines

Just checking how many street driven 455 based builds are out there with over 600 hp on pump gas,pulling plenty of vacuum for brakes,docile idle and street manners?My current engine has pulled my car to almost 124mph at a curbweight of 3710lbs.The new build consists of a much better built shortblock,much lighter rotating assembly,hardblocked for better lower cylinder sealing,balanced,line honed,zero deck,meticulous assembly.Heads are being reworked to go from a 290cfm to 325/330 range,compression is being raised from 10.2 to 11,plus a few cam valvetrain tweaks compared to the current "SD Old Faithful" cam/spring package.We are expecting easily over 600hp.
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Old 02-06-17, 11:57PM   #2
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It'll be interesting to see you make over 600 hp with a 455 pump gas sounds like your on the right track.

Interesting to see what you end up with for a cam. I'm just remembering my 625 hp 12-1 motor with Ram 1V heads 462 ci. Long before aluminum heads.
Wasn't a big roller .650 lift. Heads only flowed 265 CFM. Shifting at 5800 rpms.
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Old 02-07-17, 01:28AM   #3
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Not real sure how much I'll end up with when I get it done but my 455 + .60 over with E-heads that will be massaged a bit Ross light weight pistons, Eagle forged H-beam rods, Crane RA IV blue print cam Performer RPM intake, Pertronix ign., worked Q-Jet, RA IV exhaust manifolds Butler true roller timing chain & gears, with 3:73 rear gears & an M-22 4 spd. The car weights in right at 3700 lbs with me in it. 2 1/2 inch exhaust to the axle. I'm hoping for right at or about 525 hp. Any thoughts ???
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Old 02-07-17, 03:28AM   #4
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Quote:
Originally Posted by Gach View Post
It'll be interesting to see you make over 600 hp with a 455 pump gas sounds like your on the right track.

Interesting to see what you end up with for a cam. I'm just remembering my 625 hp 12-1 motor with Ram 1V heads 462 ci. Long before aluminum heads.
Wasn't a big roller .650 lift. Heads only flowed 265 CFM. Shifting at 5800 rpms.
I'm not sure what cam is replacing the OF cam which is a 235/245 650 lift roller..I'm trusting the shop to spec it.They have dyno'd a similar setup at 620hp.
It will be interesting to see the difference if any in normal sedate street driving,,and when it gets ran at the strip to test.
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Old 02-07-17, 11:38AM   #5
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Lou,here is a dyno mule I did a few years ago.Made 585 with virtually no tuning with a 2-4 setup.Joe Sherman thought it was easy 600 with some tuning.I just did not want to spend more on dyno time.
http://forums.maxperformanceinc.com/...d.php?t=622866
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Old 02-07-17, 01:10PM   #6
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I remember that build.Impressive!
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Old 02-07-17, 01:58PM   #7
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I will tell you IMO it was a marginal "street" build.No issue running on our 91 piss gas.Made enough vac for one really hard stop,marginal if another was needed right away.Stock converter sucked,had to put a looser one in to drive.It is a beast in a 70 GTO.We put a stock HO intake with a SMI prepared QJ so it would fit with the factory RA pans.If me I would back down the cam one notch to like a 236-242ish.Tom
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Old 02-07-17, 05:03PM   #8
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Quote:
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I will tell you IMO it was a marginal "street" build.No issue running on our 91 piss gas.
I dare you to try that now. Night and day difference with the crap they are selling
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Old 02-07-17, 05:19PM   #9
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We will see how this works out..the current combo does quite fine on 87 octane for regular driving,I do mix in some 91 when heading to the track.Same shortblock since 2009 just a basic TRW cast rod rebuild 462..no issues..

Its going to be a nice build when complete..anybody that knows Mike Voycey he built the shortblock...Dave Bisschop is doing all the head work and porting and selecting the cam..The heads and cam were bought from Dave back in 2008.
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Old 02-07-17, 06:03PM   #10
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Im driving 91 with 9.5 iron heads with 38 total advance virtually every day.Dave told me that the KRE heads handle 10.25 with the piss gas with no issue and NEVER had a issue with it.Those heads had been on at least 3 diff engines.They started life as 260 CFMs and then Dave took them out to 290.Tom
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Old 02-07-17, 06:05PM   #11
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The gas was not the issue,to me it was just too much cam for a street driven auto.Have used that cam in a lot of stick shift builds and could be OK with a 3.90 or lower gear.Tom
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Old 02-07-17, 08:40PM   #12
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I had a 455 that made over 600 hp on pump gas. then ran a 500hp fogger kit. Was in the Powerhouse Orlando street car shootouts videos 2001 and 2002 but ran race gas at that level in competition. E-heads at 10.5-1 compression

8.90's@160 weighing 3700 lbs back then.
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Old 02-07-17, 08:40PM   #13
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My car is pretty mellow just 3.08 gearing and a 3200 stall
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Old 02-07-17, 08:42PM   #14
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Quote:
Originally Posted by ta man View Post
We will see how this works out..the current combo does quite fine on 87 octane for regular driving,I do mix in some 91 when heading to the track.Same shortblock since 2009 just a basic TRW cast rod rebuild 462..no issues..

Its going to be a nice build when complete..anybody that knows Mike Voycey he built the shortblock...Dave Bisschop is doing all the head work and porting and selecting the cam..The heads and cam were bought from Dave back in 2008.
Hyd Roller, or solid roller? I'll bet its in the 265 duration range.
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Old 02-07-17, 08:42PM   #15
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Quote:
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I had a 455 that made over 600 hp on pump gas. then ran a 500hp fogger kit. Was in the Powerhouse Orlando street car shootouts videos 2001 and 2002

8.90's@160 weighing 3700 lbs back then.
Nice!
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