Is it a 305 or a 350?
#52
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Well his ran kinda crappy because it had some crappy 305 heads and things on it, also the distributor clamp kept coming loose and screwed his timing all the time. He never got a chance to build it right, he died at the ripe old age of 20 from a heart attack in his sleep last year.
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Car: 86' Trans am
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ok since all u no how to read the CASTING NUMBERS heres mine the number close to the valve covers (the deck number (V0816cdf/1fr100432) i o its a305 but wut year is it i have no clue
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Car: '88 Formula
Engine: 406, CF heads, Comp 212/218, Rhoads
Transmission: WC T5, 0.61 option
Axle/Gears: 10-bolt 3.08, re-ground Auburn Posi
The "engine code" is stamped on a pad in front of the passenger side head. These are the numbers you posted. In the number "V0816CDF," "V" is for the assembly plant, which is Flint Michigan. "0816" indicates it was assembled on August 16. "CDF" means it's a 1985 305, and came originally with a Rochester E4ME 4-bbl carb. It was VIN engine code "H" (LG4), 150 horses, and could have been installed in a B-Body, F-Body, or Omega G-Body.
Again, these numbers indicate only what the engine was when it came out of the factory. They can not tell you for sure what you have now, as the motor could be bored, stroked, or both.
References:
http://www.mortec.com/castnum.htm
http://www.nastyz28.com/sbchevy/sblock.html
#59
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Car: 25th anniv. camaro
Engine: 305 tbi
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very good sites ^^^
it even tells you the bore! sweet!
here guys, this will help with the ID codes on the motors
http://www.73-87.com/chevy_ids/blockid.htm
ohh and guys.............. your welcome.
Anthony
it even tells you the bore! sweet!
here guys, this will help with the ID codes on the motors
http://www.73-87.com/chevy_ids/blockid.htm
ohh and guys.............. your welcome.
Anthony
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Car: 52 Chevy 3/4 ton
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Sounds like the same old "Do I have a 2 bolt or 4 bolt 350???" Only way to tell is take off the oil pan and look. Only real way to tell if it's a 305, 350, 355, 383 is to pull the head and measure. Friend bought a 305, but it turned out that the guy he bought it from didn't know jack and it was originally a 350, but was now a 360. Check the casting number to find what the block started as...then if you really want to know, pull the head. I own three 350's theoretically. Two I know are 355's and one's an ls1 (346) with theoretically the original bore, I haven't pulled the head to check the ls1 yet.
Really you can not tell truly what displacement is by just pulling a head, my 383 if you pulled the head would be 4.030 same as your 355. but yes you could pull a head and tell if its a 305 or 350. same as you could not pull a head on a 400 and see if its a 377 or a 406 gotta check the crank to to make sure. ok this was me just being a smartass hehe
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Car: 82 Z28
Engine: 350 bored .030 over w/ 6-71 Weiand
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Re: Is it a 305 or a 350?
Well, I am dyslexic so I don't know if I have a 305 or a 350...or maybe it is a 530?
#68
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Re: Is it a 305 or a 350?
Yes, it was as good as everyone says. With the factory available cross ram and headers with a good tune was capable of over 450 HP with little else being done. Thats the reason that Ford had to build the Boss 302 to keep up with it in SCCA racing.
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Car: '88 Formula
Engine: 406, CF heads, Comp 212/218, Rhoads
Transmission: WC T5, 0.61 option
Axle/Gears: 10-bolt 3.08, re-ground Auburn Posi
Re: Is it a 305 or a 350?
But realize that smaller displacement, shorter stroke (302 is 4.0" X 3.0" bore X stroke) means less torque. The 302 makes its horsepower from its ability to wind up to high rpm. That "good tune" with cross ram and headers means a long-duration cam. Street manners go down the drain, but you can easily make 450 horses. That is, at 6000+ rpm. SCCA racing is a high-rpm operation. For a pure street machine, longer stroke and more cubes for low-end torque is a better deal.
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Car: 1983 Camaro Z/28
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Re: Is it a 305 or a 350?
And with the dipsticl issue ever thoguht of someone swapping oil pans.I agree the black casting numbers is THE way to tell what the block was.Also the ID stamp on the front right ledge of the block deck(is they haven't been ground off or the block decked)will tell you what the motor was originally.
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Car: 87 sport coupe, 85 Z28, 93 S10
Engine: 179ci MPFI,LG4 (soon L98), 4.3L TBI
Transmission: 700r4, none (soon T56), 700r4
Axle/Gears: stock, 3.23, stock
Re: Is it a 305 or a 350?
Sounds like the same old "Do I have a 2 bolt or 4 bolt 350???" Only way to tell is take off the oil pan and look. Only real way to tell if it's a 305, 350, 355, 383 is to pull the head and measure. Friend bought a 305, but it turned out that the guy he bought it from didn't know jack and it was originally a 350, but was now a 360. Check the casting number to find what the block started as...then if you really want to know, pull the head. I own three 350's theoretically. Two I know are 355's and one's an ls1 (346) with theoretically the original bore, I haven't pulled the head to check the ls1 yet.
Edit: Guess ill hafta wait, there's no way of knowing. Was the 4 bolt an option for IROCs or what decided what cars got em or what cars didn't, ie RPO code (Like the G80 limited slip package) or trim package (Z28,IROC)
Last edited by darrencarr; 09-30-2007 at 01:48 PM.
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Car: 1983 Trans-Am
Engine: 305 5.0 LG4
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Re: Is it a 305 or a 350?
I cant see my casting numbers, wire loom is snaped in right on top of it, along with a good size tube, and theres no way for me to see under it.
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Car: 1984 Firebird T/A
Engine: 406sbc
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Re: Is it a 305 or a 350?
My block is a 400 with a casting # of 3951509 with a casting date of k 21 3 but there were no 400's with a 509 casting in 73 so whats my engine now? A 72 casting put out in 73 or a late 74 casting so it would count as a 74?
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Re: Is it a 305 or a 350?
It's a 509 casting 400 block, and the year is absolutely irrelevant.
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Car: 1984 Firebird T/A
Engine: 406sbc
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Re: Is it a 305 or a 350?
The year is very relavent to me. 70-72 509's had a 4 bolt main, and 74-80 had a 2 bolt main. Which do I have without dropping the pan since the date is 73 and no 509's were cast in 1973?
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Car: 1984 Firebird T/A
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Re: Is it a 305 or a 350?
Well I would like to know more about my motor but dropping the pan isnt in the future right now. PLus I heard 2 bolt mains on a 400 are stronger than a 4 bolt, not sure. Wouldnt you like to know about your engine?
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Car: '88 Formula
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Re: Is it a 305 or a 350?
#83
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Re: Is it a 305 or a 350?
yeah thats why I was leaning towards a 74 but could it have been a previously cast block from before 72?
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Car: '88 Formula
Engine: 406, CF heads, Comp 212/218, Rhoads
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Axle/Gears: 10-bolt 3.08, re-ground Auburn Posi
Re: Is it a 305 or a 350?
I kinda wonder how important it is to know if its a 2- or 4-bolt, though, except just for curiosity. 2-bolts are stronger. But both are plenty strong unless you're planning to push over 500 horses out of them, or consistently rev them high. Of course, if you're going that route, you'll be pulling the pan anyway.
I'm continuing the build on mine for 420+ horses and 530+ ft-lbs. My self-imposed red-line is 5500 rpm. Either bolt patter will handle that.
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Re: Is it a 305 or a 350?
It's not the 2 or 4 bolt mains that matters on a 400, it's the block casting. The (usually 2 bolt) 509 has heavier main webbing than the (usually 4 bolt) 511. The actual number of bolts doesn't make any difference to strength in a streetable application. For any time that you'd actually need to know if it's was a 2 or 4 bolt block, you'd have the block apart at that point anyway.
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Re: Is it a 305 or a 350?
I was just curious mainly. Motor is comming apart this winter and getting built up/rebuilt.
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Car: 1991 Pontiac Firebird
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Re: Is it a 305 or a 350?
there is no real way to tell... I bought my 84 camaro with a 350 and a 5 spd... they didnt make a 350 in 84 but the guy has reciepts to prove it. I guess its possible he bought a 350 and put it in a different car and gave me the reciepts and lying to me... but given the performance upgrades... I would say he is honest, just have to trust the seller and recieve proof is important.
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Car: 82 Sport coupe
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Re: Is it a 305 or a 350?
#93
Re: Is it a 305 or a 350?
i just recently bought a 87 camaro and it doesnt run due to starter, but the guy told me its a 350 and his friend checked the casting numbers and claimed its a 350 but i know the car came with a 305 and its really bugging me id really like to know if its a the stock carbed 305 or a swapped 350 carbed. im jw how i can find this out i know u can check the casting numbers but do i have to be under the car to find them or can i just look under the hood and where exactly would it be?
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Car: 25th anniv. camaro
Engine: 305 tbi
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Re: Is it a 305 or a 350?
#96
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Car: 1985 Trans Am 305 TPI
Re: Is it a 305 or a 350?
when you check the block for the casting numbers, how do you know if its a 350 ?? will ''L98'' be written there?? yes i am a newb lol but please help
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Re: Is it a 305 or a 350?
If the guy before you swears he never raced it cut out your ac with bolt cutters put a "custom" exhaust on it a cutoff switch etc etc... you know its a 305... or simpily find a drag strip and if you run 17 seconds its a stock 305
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Re: Is it a 305 or a 350?
I have a 350 with a drivers side dipstick. Some came with passengers side. It all depends on year, and car vs truck block. Read the casting number, or take it apart and measure the bore, or the best way in my opinion is to take it out throw it away and buy a 350. That way you know for sure.
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Re: Is it a 305 or a 350?
I have a 350 with a drivers side dipstick. Some came with passengers side. It all depends on year, and car vs truck block. Read the casting number, or take it apart and measure the bore, or the best way in my opinion is to take it out throw it away and buy a 350. That way you know for sure.
55-79 cars and trucks all had driver side dipsticks.
80-2000 cars and trucks all had passenger side dipsticks
Service replacement engines (GM Crate motors) could have eithor