427 Tall Deck BBC

sounds dead stock and looks like it might need rings or valve seals or valve guides...
thats about normal for a used BBC salvage yard engine ,
but a darn good starting basic place to build a killer engine from
not a thing that a good tear down , clean-up inspection and rebuild won,t cure and then some!
besides most performance builds will have aftermarket heads or those heads having a major rebuild and port and bowl area clean-up with a 3 angle valve job.
I've always preferred the tall deck blocks to build a 496 BBC combo from

http://garage.grumpysperformance.com/index.php?threads/another-496bbc.5123/

http://garage.grumpysperformance.co...54-bbc-engine-have-any-power-potential.12343/

http://garage.grumpysperformance.com/index.php?threads/454-bbc-on-the-cheap-well-to-start.11739/

http://garage.grumpysperformance.com/index.php?threads/a-mid-range-454-bbc-build.8215/

http://garage.grumpysperformance.co...u-thinking-about-your-potential-combos.14607/

http://garage.grumpysperformance.com/index.php?threads/cheaper-454-chevy-build.4620/

http://garage.grumpysperformance.co...ting-big-block-chevy-454-cam-dyno-test.10181/

http://garage.grumpysperformance.com/index.php?threads/basic-lower-cost-big-block-build.10502/

http://garage.grumpysperformance.com/index.php?threads/489-bbc.8383/

http://garage.grumpysperformance.com/index.php?threads/lunati-496-bbc-engine-build-up.1420/

http://garage.grumpysperformance.co...-496-bbc-engine-build-up-for-the-street.3153/

http://garage.grumpysperformance.com/index.php?threads/engine-master-iron-assassin-496-bbc.916/
 
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I plan on doing the valvejob myself Grumpy.
Little leary because the Tall Deck 427 I have is supposed to have sodium filled exhaust valves.
Heard stories while on the wet valve grinder of them leaking liquid sodium metal out.
Catching on fire from the water soluable oil mix coolant spray.
 
781's are preffered on a Budget.
My tall deck has oval ports.
Flow numbers not too bad.

All else fails there is Turbo Boost Grumpy.

Just can not do a 496 build this year with Race Brodix cylinder heads.
I wish too.
 
I like the idea of medium cubic inch engines present Grumpy.
Because I drive so much.
900 miles a week in whatever I choose to drive.
Big Cubes equals Fuel thirsty engines and big gas bills.
 
big cubes with the proper build specs, a high torque curve,and flat torque curve,
matched rear differential gears and an over drive transmission,
can get reasonably good mileage, the problem is that most guys who want too use a performance engine on the street,
build an engine too chase impressive peak horsepower rather than, an instantly accessible and wide torque curve,
in the rpm range the car should be geared and cam-ed too operate effectively in.
if you build an engine too make impressive peak power in the 5500-6500 rpm range, like most guys tend to do ,
trying too or duplicating some performance magazines dyno queen,
rather than a well thought out street performance combo with instant accessible off idle torque that may peak at 5000 rpm.
on the street with street tires a properly built torque monster engine with a matched drive train, keep in mind the power to weight ratio,
the lighter weight the car is the less power you need to provide to reach any performance level,
and the less likely you are to break drive train components or over tax the brakes and suspension,
if the cars reasonably light weight you'll need less power too easily get your car in the 11-12 second range but still get 15-20 mpg.
(that makes for a much more impressive car in my opinion,for street use,
than an engine that gets 5-8 mpg and one that needs slicks and 6500 rpm shifts to get the car running in the 10s)

http://garage.grumpysperformance.com/index.php?threads/big-block-chevy-info.710/#post-72463

http://garage.grumpysperformance.co...ive-train-to-the-engine-combo.741/#post-69514

http://garage.grumpysperformance.co...am-for-street-strip-496-bbc.13384/#post-69619

http://garage.grumpysperformance.co...g-block-head-comparison.319/page-2#post-61658

http://garage.grumpysperformance.co...e-to-run-reasonably-fast-in-street-trim.3404/

http://garage.grumpysperformance.co...-converter-stall-speed.1715/page-2#post-60699

http://garage.grumpysperformance.co...gine-to-match-the-cam-specs.11764/#post-58001

http://garage.grumpysperformance.co...trans-choice-made-correctly.11697/#post-54833

http://garage.grumpysperformance.co...atios-and-when-to-shift-calcs.555/#post-54229

http://garage.grumpysperformance.co...ike-i-need-a-hole-in-my-head.4887/#post-69467

http://garage.grumpysperformance.co...-info-worth-reading-through.11528/#post-53210

http://garage.grumpysperformance.co...-displacement-street-engine.10961/#post-48577

http://garage.grumpysperformance.co...gear-ratio-or-trans-or-both.10493/#post-44277
 
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I am fa
Grumpy said:
big cubes with the proper build specs, a high torque curve,and flat torque curve,
matched rear differential gears and an over drive transmission,
can get reasonably good mileage, the problem is that most guys who want too use a performance engine on the street,
build an engine too chase impressive peak horsepower rather than, an instantly accessible and wide torque curve,
in the rpm range the car should be geared and cam-ed too operate effectively in.
if you build an engine too make impressive peak power in the 5500-6500 rpm range, like most guys tend to do ,
trying too or duplicating some performance magazines dyno queen,
rather than a well thought out street performance combo with instant accessible off idle torque that may peak at 5000 rpm.
on the street with street tires a properly built torque monster engine with a matched drive train, keep in mind the power to weight ratio,
the lighter weight the car is the less power you need to provide to reach any performance level,
and the less likely you are to break drive train components or over tax the brakes and suspension,
if the cars reasonably light weight you'll need less power too easily get your car in the 11-12 second range but still get 15-20 mpg.
(that makes for a much more impressive car in my opinion,for street use,
than an engine that gets 5-8 mpg and one that needs slicks and 6500 rpm shifts to get the car running in the 10s)

http://garage.grumpysperformance.com/index.php?threads/big-block-chevy-info.710/#post-72463

http://garage.grumpysperformance.co...ive-train-to-the-engine-combo.741/#post-69514

http://garage.grumpysperformance.co...am-for-street-strip-496-bbc.13384/#post-69619

http://garage.grumpysperformance.co...g-block-head-comparison.319/page-2#post-61658

http://garage.grumpysperformance.co...e-to-run-reasonably-fast-in-street-trim.3404/

http://garage.grumpysperformance.co...-converter-stall-speed.1715/page-2#post-60699

http://garage.grumpysperformance.co...gine-to-match-the-cam-specs.11764/#post-58001

http://garage.grumpysperformance.co...trans-choice-made-correctly.11697/#post-54833

http://garage.grumpysperformance.co...atios-and-when-to-shift-calcs.555/#post-54229

http://garage.grumpysperformance.co...ike-i-need-a-hole-in-my-head.4887/#post-69467

http://garage.grumpysperformance.co...-info-worth-reading-through.11528/#post-53210

http://garage.grumpysperformance.co...-displacement-street-engine.10961/#post-48577

http://garage.grumpysperformance.co...gear-ratio-or-trans-or-both.10493/#post-44277
Click to expand...
I am Familiar with the downfaults Grumpy of a Race Engine Normal aspirated on the street.
A Hellcat will spank a 12- second car.
 
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Just can not use a 4L80E.
What puts it out of Budget is the Racing Torque converter price tag $2k.
Sure there are those $600 specials we hear about.
How do we know they really work or not ?
I mean when it comes RACE TIME.

Then the Trans Controller.
Or EFI System .
The Real Deal is $5,000 -10,000 there to match modern OEM Performance & exceed.
 
What I am thinking is a Tight Lobe centerline cam chosen.
108-106. Intake Centerline tight as 102.

Later switch to a Wide centerline cam spread. 118-122.
For Turbo Boost Power adder.
 
Turbo 400 works.
I proven that in the 63 Grand Prix.
I flogged it real hard some days.
100 mph steady to Joilet from here. 75 miles.
Sucked down gas yes.
 
I believe in only High RPMS with Titanium Valves Grumpy.
You can hear the difference.
I can spot an engine by sound with Ti Valves at just 5,000.
So much cleaner exhaust note is present.

You can spot too.

No money for Ti in this engine today.

Brute torque.
Make the most of it to 6200-6400.

Turbo Boost as you know easily adds 300-400 ft/lbs torque throughout the powerband Low Boost.

High Boost Danger Zone can add 1,000 +ft/lbs torque.
 
All You have to do Grumpy is look at Digital Corvette.
Not a Single Hero Car.
RACE CAR.

PRO TOUR FAILED.

DC Is dead unless You or me work it daily or Nightly each.

Remember Greg with his 800 HP 540 BBC ?
Not enough for Hellcats.
Let alone the 1000 HP Demon fed 110 octane race Gas.


Even the Trans Am Guys are realizing Pro Tour sucks now.
The crap they bought is absolutely worthless racing Dodge.
 
I Ran the idea of of installing a BBC in my C4 Corvette on the Trans Am Forum.One Young guy said I had better of just stick a Pro Charger on the 350 TPI instead.

THE FACT IS THE HELLCAT WILL KNOCK THE DICKS OFF OF EVERY SINGLE PROTOUR CORVETTE & TRANSAM WITHOUT EVEN TRYING HARD.
I BET THE HELLCAT CAN SHORT SHIFT AT 4000 & STILL WIN BY 10 CAR LENGTHS.
 
The Chevrolet L-88 Was No Safe Zone Engine.
RACE WIN.

The Pontiac RAIV Was No Safe Zone Engine.
RACE WIN.

THE SINGLE 2 GREATEST GM ENGINES EVER BUILT.

RAIV HAS BEEN PUSHED TO 9'S IN NHRA SUPER STOCK WITH BONE STOCK UNPORTED HEADS & INTAKE MANIFOLD & Q-JET CARB.
 
a procharger, or turbo boosted and inter-cooled engine, on a properly built tall deck 427 BBC-496 BBC should easily exceed 900hp-1100 hp
as the BBC is significantly stronger than the SBC basic engine and the SBC has easily exceeded that power level under boost.

http://garage.grumpysperformance.co...-turbo-engine-1990-corvette-tom-nelson.12678/

http://garage.grumpysperformance.co...-car-craft-magazine-big-bang-big-block.10830/

http://garage.grumpysperformance.co...le-turbo-all-steel-496-bbc-8-81-157mph.10615/

http://garage.grumpysperformance.com/index.php?threads/link-to-killer-bbc-turbo.2457/

almost all of us are operating on a strictly limited budget, yes I'm aware,moneys tight,
but if you simply re-ring and re-bearing a low compression truck, 427 bbc,
slap those stock non-reworked 781 heads on the rebuilt short block
and swap in a mild performance cam, you'll have a myriad of problems you may not be aware of,
first the valve train geometry and clearances and valve spring load rates and rocker geometry,
and piston to valve clearance , is very unlikely to be correct.
next the heads if not reworked are not going to flow nearly as much air/fuel as they potentially might,
and the truck tall deck engines rotating assembly was designed for operation in the 1000 rpm-4000 rpm range.
the original pistons were heavy and were designed to be used in an engine with an operational rpm range similar to how a diesel engine.


the standard 9.8" deck height on the BBC requires you to make changes,
in some components when swapping to the taller truck block with its 10.2" deck height,
ESPECIALLY if your using adapter plates to use a standard deck intake.
talldeckspacer.jpg

below is the standard intake on tall deck block showing why spacers are required, to allow proper port alignment with the heads spaced further up and out from the crank center line.
BBCbott.jpg

PICT0496.jpg

PICT0495.jpg

and a standard intake on that tall deck block plugs
compress_image002.gif

p173016_image_large.jpg

In the GM part number change book, the 3899643, 67 L88 engine assembly part number was changed to 3819831 in January of 1968.

That part number fits nicely with the new 3819838 aluminum cyl heads that were released at about the same time.



l88kk.jpg

l88kk1.jpg

l88kk2.jpg

l88kk4.jpg

l88kk5a.jpg

l88kk3.png

l88kk6.png

l88kk7.png


related threads
http://garage.grumpysperformance.com/index.php?threads/900hp-bbc-n-a-build.12227/

http://garage.grumpysperformance.co...le-of-what-a-pump-gas-bbc-combo-can-do.12330/

http://garage.grumpysperformance.com/index.php?threads/another-496bbc.5123/

http://garage.grumpysperformance.com/index.php?threads/helicoils-555bbc-build.1474/

http://garage.grumpysperformance.co...budget-iron-head-build-iron-headed-rat.14283/

http://garage.grumpysperformance.com/index.php?threads/468-build.11794/

http://garage.grumpysperformance.com/index.php?threads/565-cubic-inch-bbc-build.11824/

http://www.superchevy.com/how-to/project-cars/sucp-1208-big-block-heads-shootout-the-o-vs-r/

http://garage.grumpysperformance.co...-about-your-potential-dream-bbc-combos.14607/

http://garage.grumpysperformance.com/index.php?threads/oval-port-afr-head-565-bbc.11076/
http://garage.grumpysperformance.co...u-thinking-about-your-potential-combos.14607/
 
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I was recently asked
"why it might be worth the money to build a 496 stroker BBC vs just to build a basic 454 BBC, after all its obviously going to cost more money"
Click to expand...
well the answers not always strait one way or the other, a good deal obviously should be dependent on both the owners goals and budget,
and just as obviously a realistic look at what parts you currently have,
that are in good enough realistic condition to be used in building any engine to meet the stated,intended goals.
now this basic thread is based on a TALL deck 427 engine and those engines were built,
using a 4.25" bore, size 4 bolt main cap , block's , a 3.76" stroke and 6.135" heavy duty connecting rods, oval port heads,
with a forged crank in most cases
those blocks can usually safely take a .030-.060 over bore
Id point out that a basically mildly performance rebuilt,
BBC built correctly can generally exceed 1 hp and 1.2 ft lb per cubic inch of displacement
thus a basic
427 should rather easily get you roughly 425 hp and roughly 512 ft lbs
454 should rather easily get you roughly 450 hp and roughly 545 ft lbs
496 should rather easily get you roughly 500 hp and roughly 600 ft lbs
boost the compression, select a better set of heads, match the cam and intake designs too the application, and
its not all that difficult too add a hundred hp too any of those numbers by moving the intended, and actually operational rpm range,
and engine breathing efficiency higher in the rpm range.
reading links and careful parts selection and assembly processes will save you a great deal of wasted time and cash.
larger displacement engines do not need to spin up as high to provide brisk performance if the cares reasonably light weight and properly geared.

BBCbott.jpg



RELATED INFO
http://www.maliburacing.com/patrick_budd_article.htm

http://garage.grumpysperformance.com/index.php?threads/casting-numbers-vin.93/#post-9024

http://garage.grumpysperformance.com/index.php?threads/lunati-496-bbc-engine-build-up.1420/

http://garage.grumpysperformance.com/index.php?threads/1164-hp-big-block-build.6759/

http://garage.grumpysperformance.com/index.php?threads/another-496bbc.5123/

http://garage.grumpysperformance.com/index.php?threads/454-bbc-on-the-cheap-well-to-start.11739/

http://garage.grumpysperformance.com/index.php?threads/a-mid-range-454-bbc-build.8215/

http://garage.grumpysperformance.com/index.php?threads/a-killer-496-bbc.6125/

http://garage.grumpysperformance.com/index.php?threads/535-talldeck-427-build-help-needed.5597/

http://garage.grumpysperformance.com/index.php?threads/cheaper-454-chevy-build.4620/

http://garage.grumpysperformance.co...ting-big-block-chevy-454-cam-dyno-test.10181/

http://garage.grumpysperformance.com/index.php?threads/489-bbc.8383/
 
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There are some other issues Grumpy.
No C4 Corvette is worth more than $2,000-$10k typical still.
Convertibles like mine being worth the most.
No one is professional drag racing them no more and setting records.
So the Legacy has come to a hault.
Only a small group still admires them.
Racing means price values go up.
No one Racing True so value is down.
If a C4 Was featured on Street Outlaws and WON The money prices would sky rocket.

So whatever you put in $$$$$ you will likely never get it back.

Need True disposable income and not care.

To build a 496 BBC your way nothing gets reused but the block itself.

Yes power is there.
But no Corvette Differetial can take it.
I dont think even a C7 can.

Then the Trans.
The only trans that can 100 pecent stock is a Turbo 400.
Cost Free to $500-700 with a Race torque converter.
Only inexpensive .

To do it all....$35-50 K.
 
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