lt1-lt4 1992-96 corvette engine related

[Grumpy]

it helps if you buy and actually carefully read ,
related printed reference info.
I was asked to propose a lt1-4 performance build
Id start with a 396 stroker kit, with a 4340 forged crank, and forged pistons and 210cc afr LT1 heads. Id use the melrose headers and exhaust, Id select 8:1 forged dished pistons because Id want to use a pro charger super charger and the crower roller cam linked below.

as with any corvette BUY THE CORRECT YEAR FACTORY SHOP MANUAL

1996 Corvette Shop Service Repair Manual Book Engine Drivetrain Electrical OEM | eBay

Body, Chassis, Engine, Drivetrain & Electrical. Physical Paper Manual! Loaded with diagrams & illustrations to help disassemble, repair & reassemble various components.

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LT1 cooling info

READ THIS THREAD ALSO http://shbox.com/1/component_location_views.html http://garage.grumpysperformance.com/index.php?threads/convert-gen-i-sbc-to-reverse-flow-cooling.6099/ http://www.chevyhardcore.com/news/reverse-flow-cooling-is-changing-your-small-block-worth-the-effort/...

garage.grumpysperformance.com

lt1 vs lt4 corvette engine parts differences & useful links

failing to read through the links and sub-links on this web site is always a bad idea http://www.grandsportregistry.com/lt1vslt4.htm http://www.enginebuildermag.com/1999/09/rebuilding-the-chevrolet-lt1-engine-2/ http://www.hotrod.com/articles/ccrp-0909-lt1-engine-build/...

garage.grumpysperformance.com

related linked info,
read the links for related useful info
notice the short LT1 oil pump drive bolts under the intake to the block casting, these are available in metal or plastic, obviously plastic is weaker and there's NO HOLE IN THE LT1 INTAKE, for a distributor in most versions notice the full length mallory version is a direct distributor replacement REQUIRING the hole in the intake to be alined and bolted, into place
THE first intake WILL REQUIRE A BRASS FREEZE PLUG INSERT WHERE THE DISTRIBUTOR NORMALLY MOUNTS TO PREVENT LIFTER GALLERY OIL LOSS

http://garage.grumpysperformance.co...c-gen-1-parts-compatibility.13439/#post-69777

Pic one, is a Lt1 head, notice that the bolt angle is not flush with the intake face.

Now here is the same head next to a standard SBC head, notice the bolt angle as compared to the SBC gen 1 head, also notice the spacing is different between the two heads. LT1 head is on the left, SBC GEN1 head is on the right. Also notice there is no water jacket on the intake face of the LT1

Here is a SBC GEN1 head next to the LT1 head..This is the deck surface, notice all the water jacket openings are different..SBC Gen1 head is on the left, LT1 on the right

Now there two are for the vortec head, notice that the bolts are even more of an angle than the LT1, when you bolt this intake on, the bolts are facing straight down, also notice there are only 4 bolts per head on the intake, there isnt any bolt holes in the middle

http://www.corvetteactioncenter.com/specs/c4/1996/lt1lt4.html

the later GEN2 LT!/LT4 reverse coolant flow block (ABOVE) differs from the first gen SBC
the LT1/LT4 second gen SBC engine was standard in the 1992-1996 corvette

(4)FIRST SELLS A LT1/4 LARGE PORT INTAKE IF YOU WANT LONGER INTAKE RUNNER INTAKE DESIGN

look carefully at the first gen SBC block below

increasing the lt1-lt4 350 displacement to 383-396 with a stroker crank is easily worth an additional 40-50 ft lbs and 50 hp , especially if youve added better flowing aftermarket heads and headers with a low restriction exhaust/

(6)http://www.melrosecorvette.com/1992-1996-lt1-lt4-corvette-header-system/
lt1mel.jpg

http://www.superchevy.com/how-to/en...t-1-aiming-for-600-plus-hp-with-a-396-gen-ii/

http://www.enginebuildermag.com/2000/04/rebuilding-the-chevrolet-lt1-engine/

https://corvetteparts.com/item/engine-cooling-system-rubber-hose-set-lt1-lt4-1995-1996

http://www.superchevy.com/how-to/en...-475-horsepower-lt4-powerhouse-engine-part-1/

http://www.superchevy.com/how-to/en...-475-horsepower-lt4-powerhouse-engine-part-2/

http://garage.grumpysperformance.co...t1-lt4-1992-96-corvette-engine-related.14574/

http://www.superchevy.com/how-to/en...no-testing-new-mods-for-the-lt1-motor-part-2/

http://www.enginebuildermag.com/1999/09/rebuilding-the-chevrolet-lt1-engine-2/

(5)https://www.crower.com/chevy-lt1-hydraulic-roller-cam-7025.html

http://hotrodenginetech.com/383-chevy-beyond-the-crate/

AIR FLOW RESEARCH SELLS SEVERAL much IMPROVED CYLINDER HEADS
the 210cc port size seems to have worked exceptionally well
if matched to a decent roller cam, and matching compression,
and yes to get the full benefit youll want a 3000-3200 rpm stall converter ,
add a trans fluid cooler and a 3.73:1 rear gear in the differential.
yes you'll need to swap too larger injectors and the size required can be accurately calculated based on the intended hp required.
Id suggest 1.6:1 roller rockers with 7/16" stud hole
https://www.injectorrx.com/fuel-inj...njector-calculators/injector-size-calculator/
because Id be trying for about 600-650 hp a 62 lb injector would be my choice on a supercharged 396 LT4

(1)http://www.airflowresearch.com/210cc-sbc-lt4-race-cylinder-head/

https://www.skipwhiteperformance.co...1pc-rms-king-bearings-included-lt1-kit_87489/

http://www.airflowresearch.com/chevy/sbc-eliminator-23-lt1-cylinder-head/

https://www.nookandtranny.com/Info_LT1.html

(3) http://garage.grumpysperformance.com/index.php?threads/first-intake-lt1-build.11781/

https://www.corvsport.com/1996-c4-corvette/

https://www.corvetteforum.com/forums/c4-tech-performance/3165200-supercharging-an-lt1-corvette.html

(2)
https://www.procharger.com/automoti...l-motors/corvette/1996-92-corvette-c4-lt1-lt4

http://www.grandsportregistry.com/lt1vslt4.htm

http://www.hotrod.com/articles/ccrp-0909-lt1-engine-build/

 

[Grumpy]

 

[Grumpy]

 

[Grumpy]

4th Gen LT1 F-body Tech Articles

OPTISPARK DISTRIBUTORS and KITS

Optispark Distributors and complete Optispark service kits for all 1992-1997 GM LT-1 and LT-4 Engines.

petrisenterprises.com

4th Gen LT1 F-body Tech Articles

http://shbox.com/1/coil_testing.jpg

94/95:

http://shbox.com/1/95_ign_system_schematic.jpg

96/97:

http://shbox.com/1/1996_ec_03_ign_system.jpg

http://shbox.com/1/opti_cyl.jpg

http://shbox.com/1/opti_vacuum_harness.jpg

http://shbox.com/ci/opti_vent.jpg

4th Gen LT1 F-body Tech Articles

http://shbox.com/1/fp_reg.jpg

Firing order for all small-block Chevys is 1-8-4-3-6-5-7-2

On the opti:
driver's side, top to bottom, is 5-3-7-1
passenger side, top to bottom, is 4-6-8-2

On the engine:
driver side, front to rear, is 1-3-5-7
passenger side, front to rear, is 2-4-6-8.

keep in mind any moisture in an optispark ignition causes issues like no-start or mis-firing so be sure the opti ignitions got a vacuum drain line that's clear and working, the 1996 corvette has that line from the factory, some early years don't but can be easily modified,
but it needs to be clear, not plugged with crud or leaking , or disconnected to work,
your best option when you own a corvette is to buy a damn shop manual and use common sense to track down any issues , don't just start randomly buying and installing parts, in most cases there's a logical way to isolate and be sure what parts need to ne modified, cleaned or replaced.
buy number tags for your ignition wire and use them

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I've seen guys replace an entire optispark ignition , only to find they had a bad coil or battery terminal,
(have you changed the ignition wires, ignition coil, or spark plugs in all the years you owned that corvette?)
do your research, get a multi meter and a fuel pressure gauge and learn how to diagnose your vettes issues
buy a damn FACTORY shop manual for your specific year corvette,
haynes manuals are like cheap cliff notes
and use common sense to track down any issues ,
don't just start randomly buying and installing parts,
find and join a local corvette club, if your lucky you'll find a sympathetic ,
& knowledgeable old geezer that can help you diagnose issues

 

[Grumpy]

Glyptal Red Brush On 1 qt

Seals uneven surfaces in enginecastings to improve oil circulation

www.eastwood.com

btw it should have been obvious, once the bolts resisted the initial use of the impact wrench,
that stuck bolts must be heated and penetrating lube used before the impact wrench is used to avoid striping threads
and a tip..never use a torque wrench to break loose bolts, own and use a 24"-25" breaker bar
a semi decent value

1/2 in. Drive 25 in. Breaker Bar

Amazing deals on this 1/2In Dr 25In Breaker Bar at Harbor Freight. Quality tools & low prices.

www.harborfreight.com

before removing main caps stamp /number them and place an indication which side faces the front

placing all the stamped numbers offset to one end of those main caps helps and yes even mark the rear main in a similar matter even if its obvious where it goes to help indicate which side on the other main caps face forward

1/4 in. Steel Letter/Number Stamping Set, 36 Piece

Amazing deals on this 36Pc 1/4In Steel Letter/Number Stamps at Harbor Freight. Quality tools & low prices.

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and yes remove the casting flash and use gyptal to paint the interior surfaces to reduce chances of crud getting caught in the oil flow and replace the freeze plugs with brass once and use sealant
read related threads

oil system mods that help

heres a short list REMEMBER the object or goal in building and maintaining the lubrication system is too maintain a 100% dependable pressurized cooling flow of lubricant to the bearings, rockers ,valves etc. your most important tool, is your ability to think about how things are supposed to...

garage.grumpysperformance.com

installing an oil pump pick-up tube

there's two ways ,...... you can use the correct tool, which is ADVISABLE! use this oil pump(link below) in most stock SBC builds, as it produces a 10% increase in oil volume and standard pressure which is just fine , but obviously check your bearing clearances and oil pump to oil pan floor...

garage.grumpysperformance.com

whats a windage tray do?

"OK GRUMPYVETTE< I have dumb question? What is a windage tray and whats it for?" windage trays don,t provide a huge boost in horse power, the purpose is mostly in providing much improved oil control, thus they can, if properly designed provide a much more consistent oil supply, and enhanced...

garage.grumpysperformance.com

yes the oil filter you sellect does make a differance

READ THRU THESE SUB LINKS CAREFULLY theres a great deal of info here to look thru. pay attention to filter construction and the filter materials and total filter medium area, when discussing oil filters keep in mind their intended function, which is mostly too efficiently trap and remove...

garage.grumpysperformance.com