walking around the Junkyard today, I saw a Beat and and Mangled Firebird, With what appeared to be a LG4, except it had centerbolt valve covers and Roller lifters.


Am I missing something ?

It didnt appear to have ever been worked on, it was dirty as ****.


Also, any reason I cant use a V6 heaterbox on My Sport coupe, I found a non AC box at the yard ( not saying where ) but its in a V6 car, I dont see why not but I thought i would check.




------------------
60 Ranchero - Project ( Money Hole )
85 Sport Coupe LG4 - Daily Driver

Just another Hot Rod kid, or thats what they all tell me.
Livin' the Stereotype

 

An '87 LG4, per chance? The only year of their kind, if I've collected the data properly. I believe someone has a set of such heads for sale in the classifieds.

------------------
82 Berlinetta, orig V-6 car, now w/86 LG4/TH700R. 2.93 limited slip. Cat-back from '91 GTA, Accel HEI SuperCoil. AMSOIL syn lubes bumper-to-bumper. Daily driver, work-in-progress (LG4 w/LB9 block, ZZ3 cam and intake, WP 305 heads ported & polished, Hooker headers & y-pipe, 3" Catco cat).
57 Bel Air, my 1st car. 0.030 over 396, Weiand Action+, Edelbrock 1901 Q-Jet, Jacobs Omnipack, 1-3/4" headers, TH400 w/TCI Sat Night Special conv & Trans-Scat shift kit, 3.08 10-bolt w/Powertrax, AMSOIL syn lubes bumper-to-bumper. Best 15.1 @ 5800' Bandimere. Daily driver while Camaro was being put together.

 

Hmm, Makes sense.

Its a Roller Cammed Motor, then ?


Do those heads Flow anybetter than the 416's ?

Basically, Should i go Grab them if they are cheap ?




------------------
60 Ranchero - Project ( Money Hole )
85 Sport Coupe LG4 - Daily Driver

Just another Hot Rod kid, or thats what they all tell me.
Livin' the Stereotype

 

Are you sure it was roller cammed? I didn't think GM ever bothered with putting rollers in any of the carbed engines. I know my buddy's 87 monte SS (L69) definitely had a flat tappet cam with cenetrbolt heads.
I suppose it's possible though...anything is w/ GM
...ed

 

I'm pretty sure I read somewhere that the 87 LG4 got centerbolt valve covers and roller lifters. I can't remember where, though. Not that it makes much difference, still slow as sh*t...

 

Yeah Ed, my little brother's 87 MC SS L69 was just like that too.

Of course the motor in the JY could also have been an original TBI motor installed into an older car under an LG4 intake.

------------------
"So many Mustangs, so little time..."
ICON Motorsports

 

I had an '87 Firebird with a roller-cammed (had to change the timing chain) 305 (LG4) with the 4 barrel carb, centerbolt valve-covers and 5 speed.
jms

 

Well I know that all chevy small blocks 87 and later had centerbolt valve covers and a roller cam. And they offered the LG4 until 87, so in theory there should be a few F-Bodys that slipped out of the factory with an LG4 engine having centerbolt heads and a roller cam. Man that would be the LG4 to have since you could put a monster cam in it.

------------------
1983 Pontiac Firebird SE
LG4-Based Chevy 400
700R4 Tansmission
Modified 4 Barrel Q-Jet Carb
Accel Super Stock 8mm Wires
Edelbrock Pro-Flo Air Cleaner
3.23 Posi Rear
14X7" Cragar SS/T Wheels
Clarion 45X4 CD/AM/FM Head Unit
100WX2 Amp
2 Pioneer 12" Subs in Custom Box
Third Gen Performance
"A four cylinder is only half an engine"

 

See my post above. Also, all the truck blocks (actually the majority of the V8s produced in those years, by a factor of about 3) remained flat-tappet until well into the 90s; some if not most of those didn't even have the factory's bizarre roller stuff made into them.

My late brothers 87 Monte Carlo SS L69 had centerbolt valve covers, angle intake bolts, no rollers, no provision whatsoever not even so much as the bosses cast in but left undrilled.

87 being a changeover year it's hard to sit back and armchair-reverse-engineer what came in the various permutations. Frankly I doubt that LG4s would have rollers if L69s didn't get them, but stranger things have happened. I'm still inclined to think that it was a later motor in the 87 hull. But of course if it actually was a roller LG4, it probably got the same pitiful swirl-port heads that the TBIs got, which would render it basically useless.

------------------
"So many Mustangs, so little time..."
ICON Motorsports

 

The 1987 LG4 was a funky setup in that year. It had the centerbolt heads, roller cam, ELECTRIC FUEL PUMP, angled center intake bolts, etc...

------------------
If you live in Southeastern US, check us out!
South East Thirdgen


ASE Master Tech + L1
Savannah, GA

'87 Trans Am
S/D TPI retrofit including functional PassKey,
22# injectors,
Whatever chip I feel like burning,
JET AFPR, Ported Plenum,
TB Coolant Bypass, Custom Cold Air,
SSM SFC, KYB Shocks, Boxed LCAs, Wonder Bar,
8mm Accel wires,
Flowmaster Exhaust,
16" GTA rims,
Corvette Servo,
-->14.97 @ 94.9 MPH<--

'97 Bonneville SSE

 

Bernard:

Which heads did it get? Were they the same as the L69, or were they like the later TBI junk ones?

------------------
"So many Mustangs, so little time..."
ICON Motorsports

 

I don't know for sure, but I thought that the Heads and Camshaft were two things that always seperated the LG4 and the L69.

Not saying that this is true, but knowing how GM works, they probably used the same heads as whats on the TBI so there are less parts to produce. Just like the '82-'88 rear disc brakes. One caliper is mounted in front of the rotor, the other behind it. That way there is one backing plate P/N and one Caliper P/N and they can be swapped side to side.


------------------
If you live in Southeastern US, check us out!
South East Thirdgen


ASE Master Tech + L1
Savannah, GA

'87 Trans Am
S/D TPI retrofit including functional PassKey,
22# injectors,
Whatever chip I feel like burning,
JET AFPR, Ported Plenum,
TB Coolant Bypass, Custom Cold Air,
SSM SFC, KYB Shocks, Boxed LCAs, Wonder Bar,
8mm Accel wires,
Flowmaster Exhaust,
16" GTA rims,
Corvette Servo,
-->14.97 @ 94.9 MPH<--

'97 Bonneville SSE

[This message has been edited by GMTech (edited March 01, 2001).]

 

Ill go get a casting # On those heads next week If I get a chance, So We can see. Stupid me didnt even think to look last time.




------------------
60 Ranchero - Project ( Money Hole )
85 Sport Coupe LG4 - Daily Driver

Just another Hot Rod kid, or thats what they all tell me.
Livin' the Stereotype