Engine Mods
Here is my Jeg's mega order waiting to be installed
Here are the new engine specs from the top down.
Holley 650 cfm double pumper carb w/ 1" spacer
Russell -06 braided stainless steel hose & hi pressure fittings connect
the carb to the Holley 110 gph mech street/strip fuel pump
Edelbrock RPM Air-Gap intake manifold
Heads are "double hump" (casting # 3927186 off a 69 302cid Z/28) w/ a
street/strip port & polish & the intake ports have been port matched,
they've been machined for teflon seals and have new Comp Cams springs, locks
& retainers. They were also milled .006 and have 63cc chambers. Compression
is 9.7 to 1.
Crane roller rockers
Moroso Blue Max wires and AC R44ts plugs
Headers are still the BlackJack AK 5000's
Edelbrock aluminium water pump
Comp Cams XE 274 camshaft - 230/236 deg. duration @ .050 lift & .487/.490
lift @ valve
Pistons are forged flat tops that are .030 oversize (355 cid)
Rods are stock (as far as I know)
Block is stock (except for .030 overbore) and is possibly a 4 bolt main since
it came from a truck
Crank is also stock as is the oil pan & pump
According to the Drag Strip Plus program I have, this combo should be good for about 400 horsepower!
I still need to get the electronic ignition (Mallory Unilite distributor, coil & Hy-Fire IV box).
Dad & Jared just getting
started unbolting stuff
Jared taking off the rear compressor bracket
Pistons cleaned, new cam in, block painted, water pump on...........
.........waiting on the new heads to come back from the machine shop
We finished assembling the engine then drained the old oil from the pan. Then the car was rolled out of the garage where it has sat for the last 4 weeks into the driveway. The radiator was filled with water and the engine with oil (except for the 1/2 quart I poured on the ground because of the valve cover gasket). What I didn't notice here was, that when I changed the oil filter, the old filter's gasket stayed on the block! Sooooo, when the engine fired, we had oil spraying all over the headers and running out on to the ground. Engine ran like this for almost 1 minute before we realized what was going on (lots of smoke!) and shut it down. Got that fixed and she fired right back up and ran at 2000 RPM for the 20 min. break in period for the cam. After that, tried to get it to idle down & set the timing, mixture, etc. without much luck. Finally had to drive over to the gas station before it ran out of gas. A few days later, I realized that there was no gas in the secondary fuel bowl of the carb. Took that apart and found a stuck needle & seat. Fixed that and things improved quite a bit (no more back firing). The next day, we took the whole carb off and checked the primary side. Everything looked ok so we put it back together & reinstalled it on the car. After that it ran 100% better than before. Don't know what we did (but wish I knew) but, it worked. Now the engines idles in park at 1100 RPM with a hint of burble & lope to it and 900 RPm in gear with a noticeable lope. Sounds great! and runs pretty damn good too. Got some more fine tuning to do on the carb yet. It has a slight stumble when you just nail it from a dead stop but if you hold the brake and bring it up against the converter to 2000 RPM and let her go.....LOOK OUT! She will fry the tires all the way through first gear and into second. When it does hook up it pulls real hard all the way to 6000 RPM. I need to play with the pump shot, shooter size and jetting.
A closer shot of my pile-o-parts
Got a few more pics of the finished product still in the camera. I'll get up here as soon as we burn a few more pictures of the kids or something.
The finished product
Fully assembled, wearing new GMPP valve covers & air cleaner and Moroso wire set. Looks nice!
Last updated: 05/24/00