454 vs 496 vs 502

[justahoby]

I scored like a 20,000 mile engine out of a motorhome 800 bucks like new... ported with 30 hours of finess and pain cut my 3 angle valve seats on the peanut port heads.. the bottom end was already decked like ten, 0.020 head gasket yielding like8.1:1 instead of 7.9:1.. took a lunati 60202, had it custom ground on a 108 LSA to get just under 7.4 DCR , Gets 15in of vacuum with 16degrees initial and a q-jet at say 700 rpm .. cheap regular street sized headers... There is your 500+ ft lbs of torque... here is a similar with junk peanut heads( unported) same cam on the 112 LSA on 8.8:1 compression dynoed:
http://www.chevelles.com/forums/show...=309772&page=2

that 530 ft lbs like over 500 avrage with them garbage heads unported

[77BBGMC]

Originally Posted by glock7018

Ever had it dynoed?

We did run it on a dyno, if you go to my profile you can click on the album and there is a chart with the results. The final pull was 556hp 5400rpm and 606 ft/lbs 4400rpm. It's pretty much an old fart's pickup but you sure can surprise people once and awhile.
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[Captainfab]

That sounds like a fun engine. I've been seriously considering building a 496. Would you be willing to share the basic info on the engine?

Originally Posted by 77BBGMC

We did run it on a dyno, if you go to my profile you can click on the album and there is a chart with the results. The final pull was 556hp 5400rpm and 606 ft/lbs 4400rpm. It's pretty much an old fart's pickup but you sure can surprise people once and awhile.
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[idreama300]

Originally Posted by 77BBGMC

We did run it on a dyno, if you go to my profile you can click on the album and there is a chart with the results. The final pull was 556hp 5400rpm and 606 ft/lbs 4400rpm. It's pretty much an old fart's pickup but you sure can surprise people once and awhile.
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You say this is a budget build... what kind of budget are we talking? I too would like to know some specs if you don't mind.

[77BBGMC]

Originally Posted by Captainfab

That sounds like a fun engine. I've been seriously considering building a 496. Would you be willing to share the basic info on the engine?

Now that I look back maybe low budget was the wrong choice of words, the original goal was $3500.00 but when it was all done it was closer to $5000.00 in the pickup, headers to air cleaner. I did spend extra on the retro roller, not sure that was the best money spent. My brother-in-law worked at a machine shop at the time we built the motor so that was a big plus for me, donor motor had a bad crank and 781 heads, the roller rockers and intake were purchased used. I was able to sell the motor out of my pickup to offset some of the cost as well. I didn’t budget for the little stuff, belts, hoses, wires, rev limiter, new fasteners for bolt on accessories, etc., that stuff adds up fast. This is my first motor project so I learned a lot, wished I would’ve been a little more aggressive with the cam and saved up and went with aluminum heads. (If I had the money it would have a 572!)

Here's some of the specs., I bugged a few folks on the site for their feedback durning the build, we have some good guys on this site!

Crank Scat cast crank 9-454-4250-6135, 4.25 stroke
Pistons Speed Pro w/H552CP , Moly Rings
Rods Stk, reworked, Pins floated, ARP Wavelock bolts
Heads 781 casting oval port 118cc, Milled .010
2.19 int./1.88 ext., .100 stainless valves
Bowl blend and clean up runners
Comp 10 degree locks & retainers
Comp 930-16 dual valve springs
Comp 1620-16 Ultra Pro Magnum roller rockers 1.7
Comp 3/8” Magnum push rods 7.75/8.75
Cam Comp Hydraulic roller part number 11-000-8 grind #cb3315/3356hr 112+5
Duration @ .050 230 int./242 ext.
Lift w/ 1.7 rockers .578 int./.567 ext.
LSA 112+5 degrees of advanced built in

Fuel Pump- Holley Mechanical 110 gph
Carb - Holley 870 Street Avenger
Intake – Edelbrock Airgap

[idreama300]

Originally Posted by 77BBGMC

Now that I look back maybe low budget was the wrong choice of words, the original goal was $3500.00 but when it was all done it was closer to $5000.00 in the pickup, headers to air cleaner.

I would consider $5000 a good price for what you've got, all inclusive. Thanks for sharing.

[Captainfab]

Yes, thank you for sharing the info on your engine.

That helps those of us considering building a 496 in that we know a little more what it takes to achieve a given power goal.

[prostreetC-10]

Originally Posted by redsled87

You'll make 375-400hp easily out of a 496. You'll also have torque out the a$$ too.

You would probably have to really mis-match parts to get numbers this low. I have been studying the crap out of the 496 builds and can't believe what I am seeing. Car Craft did a cylinder head shootout on a very mild 496 (little 274 with .555 roller cam). They decided to throw in a set of dog sheet stock 2.06 valved peanut port heads. I say dog sheet because of the lack of flow for a motor this big. As choked down as they are on this size inch motor, the fricking thing still made 521hp and almost 600 ft lbs of TQ. That is insain. I just picked up my 4.250 crank yesterday. With my ported 781s on either 2.19 or 2.25 valves, I should be closer to the 600hp mark!

Yes Mr. Fab......I will keep you posted!!! lol

Dub

[jimbonice]

Originally Posted by 69GMC910

I would recommend the 467 to you!

http://www.vortecproperformance.com/...binations.html

467 517 HP 564 TQ 9.1 compression Excellent muscle car engine replacement, excellent vacuum, very street friendly.

That's hard to beat.
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[prostreetC-10]

Naw.....don't mess with those little motors. Here is one of Mark's (vortecpro) little 650HP 496's in a 3.08 geared 71 vette.

http://www.youtube.com/watch?feature...&v=FYqBMqTgUwU