jlc84cam350

ok engine is from an 81 camaro lg4 305. Bottom is completely stock, has 416 heads that have had 1.94" intake ports machined in (currently at machine shop), comp 262xe comp cam kit with new timing chain, gears, valve stem seals, valve springs ,lifters etc... Has edelbrock intake unsure which one it is came with the engine, currently has stock electic choke q-jet, but swapping later this summer to holley 650cfm double pumper. Also has hooker shorty headers, 3" ypipe from headers, and 3" single exhaust all the way back with deleted cat, dynomax exhaust in rear. I am estimating it will do 220hp at least what to you guys believe it will make? I know its just a 305, i got screwd over by a friend whom told me it was a 350, but not to worry everything going in this engine will eventually land in a 350, even the heads.

DSmith

220 to 230 sounds about right 250 at the most I would think.

five7kid

iTrader: (14)

Assuming a Performer intake manifold, you'll be approaching 300 peak gross flywheel HP. Assuming you have decent exhaust and air cleaner, that'll probably be in the 240-260 range net flywheel HP.

The Holley won't help you power-wise. If you plan on bracket racing the car, then perhaps the DP.

jlc84cam350

ok, so the carb wouldn't help much, might as well spend that money somewhere else's, i don't plan on racing the car i just want to beat up a thew imports with it. Any other peroformance upgrandes i could do to this 305? Also just a small question, i have a th350 tranny behind the lg4, for 1/4 mile times, would this be better than the 700r4 or worst, or about the same? And say when i do get a sbc 350, i plan rebuilding it fully not like this one just being the top end. how much hp do you this it would produce using all these exact same parts in an a 350?

five7kid

iTrader: (14)

Basically what I did, except I got World 305 heads and ported them, and Crane 2050 in the 305 (a little bigger than the XE262). Kept the TH700, higher stall converter.

Putting those things on the 350 shortblock, except going with ZZ4 cam since I had a roller block, it took 1.4 secs off and added 5 MPH to the 1/4 mile. Granted, the TH700 was weak behind the 305 and wouldn't shift 2-3 WOT, but the incrementals up to 1000' were also significantly better with the 350.

Last summer I tried a Holley 650 DP spreadbore on the 350. Although it ran well, it wasn't any faster than the q-jet. Gas mileage and driveability were both worse, however.

spina74

iTrader: (5)

how come when I asked this question i got b*tched at?

jlc84cam350

thats quiet a difference between the 305 and 350, o well hopefully it'l still pull the little rice burners around here. I ain't sure yet but i am starting to thing new style fuel injection 350's are a better way to go than, these older carbed style engines. I mean heck a 98ish and up camaro will make 300+ hp stock!, I don't really care for anymore than that, and back that up with a six speed id be in paradise. I haven't ever cared much for fuel injection but lately i been thinking other wise. I guesse i am just scared of seing all these vacuum and electrical lines and trying to fit that in a car that it wasn't ment for. But its something to think about in a couple years, if my 305 still works o.k. think i am swapping the tranny and engine in my 4runner, and try to find somekind of t-56 and FI engine combo sold together to put in my maro, and besides my yota would just love a sbc heart in its 22re slow as hell piece of junk engine hehe.

InfernalVortex

iTrader: (4)

Judging by your post, maybe it was your attitude?

five7kid

iTrader: (14)

You mean this one? https://www.thirdgen.org/forums/tech...tml?highlight=

There's a bit of difference between the information provided, wouldn't you say?

Besides, that was the week of my anniversary, and I didn't get on the Board much during that time period. . .

TANGO

iTrader: (2)

This is a low C/R LG4 305 not a HO L69 305 More like 265 max HP . Find a 350 short block from your local Craigs list and Do the 350 build now . I picked up a good 1971 350 short block for $75.00 bucks . Use the #416 heads the Edelbrock intake and that XE262H Cam . But pick up a non- computer 750 Q-Jet and a pre 81 HEI . This set up will make 350 real HP and much more Torque then that 305 Build will ! COOL

jlc84cam350

o yha i also forgot to mention, not installed yet but i am taking of the clutch fan and putting dual electric, i already have one electric off a jeep, need another one to jimmy rig it on their. Also has accel super coil. these should give an extra 10 hp aye?

SteelTownMadDog

iTrader: (2)

650DP on the 305 is going to be a dog. Stick with the Qjet. I got close to 400HP with a Qjet. IMO, it's the most under rated carb.

jlc84cam350

and o yha what's ya mean by C/R thanks! I would like to do the 350 build now but engine is in and running, i only realized it was 305 after it was in, knowing that i woulda gotten back my money!, But its a bit too late now, and besides i really want to try this thing out later this summer before i start my college class, won't have much money or time to spend on it when i start since i won't even be living close to my home.

Sonix

iTrader: (1)

I was just skulking around this thread until now. I'd have to agree with Tango there. I think these are pretty optimisic guesses. I think 240HP would be amazing.
Think of it this way, this is a 150HP engine, with headers and exhaust, a mild cam and that's it. A bigger intake valve but no porting. I think 100HP gain is HIGHLY optimistic. It'll be a lot more fun to drive that's for sure, but I think 50-70HP is pushing it.

C/R = compression ratio. You have the 8.5:1 rather than the L69's 9.3:1 or whatever it was. If you're now going to a composition head gasket it'll only be lower. Shave the heads a bit if needed to keep them flat and use another shim head gasket.

Don't use dual electrics. Just grab a Ford Taurus fan and wire it up to low speed with a temp sensor in the head. My 350 has sat in traffic with the cammed up setup and only wired to the low speed and hasn't overheated. I'm going to wire it up so I can use the high speed if need be. The taurus fan is a lot easier to do than shoe-horning in dual crappy fans

jlc84cam350

Would the one i listed off the 98 jeep tj work? one of my friends gave it to me and i didn't know if it would be enough to keep it cool.

Sonix

iTrader: (1)

I don't know anything about those fans. It may work, maybe not.

The Taurus fan is very common among hot rodders as it's super easy to set up, and one of the most powerful (and easy to find) fans out there. It's more powerful than many of the aftermarket setups.
I paid $30 for mine from the JY. Throw in a relay, some wire and terminals, call that $50 now. Add in a temp sensor from a corvette website (195* I think) grand total was about $70CAD.

jlc84cam350

So your's goes off as soon as your car hits a certain temp aye? Where does that temp sensor go? I been checking to figur out how too hook it all up still not very sure how it works but thanks anyways. and yha just a quick question, what makes the 305 H.O. have more compression is it all in the heads? Cause i can get a 305 H.O. for pretty cheap, whole car for under 200$, the motor runs o.k. but its seen better days, i read somewhere here that the heads on l69 and lg4 are the pretty much the same, but if they aren't would it be worth getting them?

Sonix

iTrader: (1)

Heads are identical, the L69 had flat top pistons and LG4 had dished pistons.

There is a temp sending unit in the passenger side head which controls the temp gauge in the car. There is normally a plug in the drivers side head in the same spot - I just replaced the plug with a switch. At first I just went to Napa and bought the stock 1989 Camaro fan switch (on at 215*F). The motor ran HOT. I couldn't use a 180*F one or the fan would be on all the time. With my 180*F thermostat, 195F switch is just right. I bought it online from a corvette website, I think it was $15 or something, plus shipping.
Turns on at 195F or so, off at 185F or so.

You enjoying the blizzards there? haha, hope you got a sled eh?

TANGO

iTrader: (2)

Real good info on the Ford fan COOL I will look for one this year . What years and engine size should I look for ? Thanks

Sonix

iTrader: (1)

'93 or so. I think mid '90s is safe. The ford 3.8L. Taurus, Sable, etc. It's a SUPER common setup.

jlc84cam350

Nope, daddy sold his sled thinkin we weren't gonne get any snow lol! We are frikin buried over here, haven't seen anything like this in the last 5 years!