305 H.o.???? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

CbHeEaVsYt · 02-23-2005, 02:09 AM

has anyone ever heard of a 305 high output cause my buddy has a friend that had an 82 camaro it had a 305 that had 5.0 (which my truck has thats why im asking) cause every other 305 ive seen is a 5.3

any input would be great?!?!?

cb

Destructo · 02-23-2005, 02:31 AM

305ci motors are 5.0L, and some camaros came with 5.0L high output motors, which is just a 305 with a little more power.

the new 325ci motors and the older 327s come out to 5.3L.

TrainD5115 · 02-23-2005, 10:22 AM

The high output package on an 86 Z-28 had a dual snorkle air cleaner if memory serves. I haven't heard of one in a 73-87 yet but I am wrong frequently.

stepside454 · 02-23-2005, 10:42 AM

Yep..what destructo said...305 is a 5.0... the H.O. part didnt mean a whole lot more than marketing really. some people claim the H.O. had better heads, but the heads on any of the 305 H.O.s Ive ever pulled apart are the same casting # as any other early 80s 305 4 barrel Ive pulled apart

MylilBowTie · 02-23-2005, 10:44 AM

The H.O.'s did have more compression than normal 305s and a hair bigger cam.

MylilBowTie · 02-23-2005, 10:57 AM

L69 1985-88
Type: 90-deg. V-8 Front Longitudinal
Displacement: 305 cubic inches (5.0L)
Horsepower: 180@4800 RPM
Torque: 225@@3200 RPM
Max RPM: 5500
Idle RPM: 650
Compression ratio: 9.5:1
Block: Cast Alloy Iron
Deck Height: 9.025"
Deck Clearance: 0.25" below
Bore: 3.740"
Stroke: 3.480"
Bore Spacing: 4.400"
Crankshaft: Nodular Cast Iron
Pistons: Cast Aluminum Alloy, flat top
Rods: 1037 or 1038 Cast Steel
Camshaft: Hydraulic flat tappet
Cam lift: .404"/.415"
Cam duration @.050: 202/206-deg.
Advertised duration: 320/320-deg.
Lobe Seperation: 115-deg.
Heads: Cast Alloy Iron, 58cc
Valve size: 1.84"/1.5"
Intake: Cast Aluminum Alloy
Carburetor: 795cfm Quadrajet four barrel

Lynx · 02-24-2005, 12:38 AM

what kind of numbers does a Normal truck 305 put out?

CbHeEaVsYt · 02-24-2005, 01:38 AM

has anyone ever heard of these in our truck cause my truck has to much power to be stock cause i drove my friends which had less miles than mine and mine has way more power

j/w

cb

MylilBowTie · 02-24-2005, 06:30 AM

For the 1984 Sales brochure I have. There are two 305's LF9 (California emission spec) and LF3 (non emissions California spec)

Type: V8 OHV
Displacement: 5.0 (305 Cu. In.)
Bore and stroke 3.74 x 3.48
SAE Net Horsepower: LE9 160 @ 2000 rpm LF3 155 @ 4000 rpm
SAE Net Torque: LE9 235 @ 2000 rpm LF3 245 @ 1600 rpm
Compression Ratio: LE9 9.2:1 LF3 8.6:1

stepside454 · 02-24-2005, 04:34 PM

Cb could have alot to do with gearing, if your truck is 3.73 gear & his is 2.90, yours is going to feel more powerful taking off & around town

MylilBowTie · 02-24-2005, 05:57 PM

Not to pick on civics but they have really low gears and still don't feel any of the torque. I could tell a decent difference going from a rear that had 2.73s to 3.08s.

Low84 · 02-24-2005, 07:31 PM

Quote:

Originally Posted by MylilBowTie

For the 1984 Sales brochure I have. There are two 305's LF9 (California emission spec) and LF3 (non emissions California spec)

Type: V8 OHV
Displacement: 5.0 (305 Cu. In.)
Bore and stroke 3.74 x 3.48
SAE Net Horsepower: LE9 160 @ 2000 rpm LF3 155 @ 4000 rpm
SAE Net Torque: LE9 235 @ 2000 rpm LF3 245 @ 1600 rpm
Compression Ratio: LE9 9.2:1 LF3 8.6:1

Do you have any specs on an 84 350?

**Boog** · 02-24-2005, 08:25 PM

I looked at an 86 Blazer with 305. The guy said it was the HO and the same engine put in the monte SS that year. Special ordered he said. I didn't buy it.

edman87 · 02-24-2005, 11:58 PM

Never heard of a 305HO, your buddy might be referring to the crossfire 305, which had 2 tbi uints on them, I know these were available in some early to mid 80's camaros, vettes, and montes

**N2TRUX** · 02-25-2005, 12:00 AM

Quote:

Originally Posted by Boog

I looked at an 86 Blazer with 305. The guy said it was the HO and the same engine put in the monte SS that year. Special ordered he said. I didn't buy it.

They did put the 305 HO in the Monte SS. They DID NOT put it in any truck....

CbHeEaVsYt · 02-25-2005, 01:45 AM

can neone tell me how to identify my drive train so i can figure out y is so darn quick for a little 305????

cb

MylilBowTie · 02-25-2005, 05:07 AM

With out looking and decoding what you have you could have. It could be any of the sbc family, 327 - 350 - 283 - 265 - 305 - 400 or whatever someone put in there so it could have a 305 HO but is unlikely that it is.

http://www.Mortec.com can be a pretty good friend. There is a casting number on the driver side head next to the firewall where the engine and transmission bolt up at. That will tell you what you have. If its newer it will have 5.0 SGI or 5.7 SGI. If you have trouble finding it http://www.mortec.com/location.htm and the casting numbers page http://www.mortec.com/castnum.htm

I use the last 3 numbers and goto the tool bar and use the find option with the last 3 digits to the engine code like 010 for a 3970010 (350) makes it easier and you don't have to look down that whole list or miss it.

Transmission will depends on the shape of the pan, number of bolts, if it has a modulator valve and where its located.

Any pictures of anything you cant figure out will help a lot also.

Type: V8 OHV LS9: light duty emissions LT9 Heavy duty emissions
Displacement: 5.7 (350 Cu. In.)
Bore and stroke 4.00 x 3.48
SAE Net Horsepower: LS9 165 @ 3800 rpm LT9: 160 @ 3800 rpm
SAE Net Torque: LS9 275 @ 1600 rpm LT9 250 @ 2800 rpm
Compression Ratio: LS9 8.2:1 LT9 8.3:1

Also for California spec 350 was the LT9 but is rated at 155 horsepower @ 4000 rpm and 240 torque @ 2800 rpm

MylilBowTie · 02-25-2005, 05:11 AM

Your Differential (rear end) is most likely a 10 bolt 8.5 (28 spline axles), you can also decode those with the help of some other members. But it doesn't really help much if the gears have been changed out for a different ratio.

84 PUMPKIN · 02-25-2005, 01:00 PM

I have a couple of very interesting photos related to this subject if someone could post them for me.

CbHeEaVsYt · 02-26-2005, 02:07 AM

ok i know this it has OD which means th700r4 it appears to be stock motor but u never know i cant get to the casting numbers right away cause i have it in storage right now but got a chance to drive a day before i qeustioned the motor it says 5.0 305 on the radiator support stock sticker it is a silverado 82. i think it may have been a california truck cause jve never EVER seen that many vacuum lines and before i changed out the stock exaught for duals it had two catylac converters and 2 mufflers its got all the original smog pump and emmisions so unless some just ripped it out of a cali car whole then again u never know ive seen stupider stuff done well that is wat i can remember off the top of my head please tell me if i helped u ne my lil bowtie

and i can post those for u 84 pumpkin

or anyone in here have intrafan just download that at intrafan.com and u can resize them

cb

CbHeEaVsYt · 02-26-2005, 03:19 AM

ok made a mistake the program is IrfanView

www.irfanview.com

cb

CbHeEaVsYt · 02-26-2005, 03:24 AM

here is a direct link http://quantum.tucows.com/adnload/194967_75076.html

cb

MylilBowTie · 02-26-2005, 11:03 AM

Here are the pictures I was sent from 84 Pumpkin.

What would I would like to see is the paper work on the truck. I've seen the pictures so far, wouldn't mind seeing some more if they are available. I'm still not decided about it just yet.

chevyjr73 · 02-26-2005, 11:12 AM

does anyone know where i could buy one of those dual snorkel air cleaners?

MylilBowTie · 02-26-2005, 11:22 AM

Im pretty sure gm doesnt make them anymore, might try to find a 83-85 Camaro or Monte Carlo to get one.

02-23-2005, 02:09 AM	#1
CbHeEaVsYt Pick up man Join Date: Feb 2005 Location: trenton mi Posts: 135	305 H.o.???? has anyone ever heard of a 305 high output cause my buddy has a friend that had an 82 camaro it had a 305 that had 5.0 (which my truck has thats why im asking) cause every other 305 ive seen is a 5.3 any input would be great?!?!? cb __________________ heres sum pics of my truck 82 silverado c10 heres my baby 1990 k1500 check out this 1957 chevrolet for sale

02-23-2005, 02:31 AM	#2
Destructo Registered User Join Date: Sep 2003 Location: Lewisville, NC Posts: 1,836	305ci motors are 5.0L, and some camaros came with 5.0L high output motors, which is just a 305 with a little more power. the new 325ci motors and the older 327s come out to 5.3L. __________________ 1985 Scottsdale Shortbed 4x4 Stout 350 with some "upgrades"-700r4-33x12.5" Mud Tires, Warn 8274-50 winch. 2005 Chevrolet Colorado Regular Cab 2wd 4-banger, 5 speed, Street Pack with 3.73 axle.

02-23-2005, 10:22 AM	#3
TrainD5115 North Coast, baby! Join Date: Jun 2004 Location: Toledo, OH Posts: 437	The high output package on an 86 Z-28 had a dual snorkle air cleaner if memory serves. I haven't heard of one in a 73-87 yet but I am wrong frequently. __________________ Brad 79 Scottsdale C20 350/350 3.73's Still running full CA smog gear!

02-23-2005, 10:42 AM	#4
stepside454 Registered User Join Date: Nov 2003 Location: st. louis area Posts: 1,551	Yep..what destructo said...305 is a 5.0... the H.O. part didnt mean a whole lot more than marketing really. some people claim the H.O. had better heads, but the heads on any of the 305 H.O.s Ive ever pulled apart are the same casting # as any other early 80s 305 4 barrel Ive pulled apart __________________ 75 GMC C-15 short/step factory 454, lowered

02-23-2005, 10:44 AM	#5
MylilBowTie Right turn Clyde Join Date: Nov 2002 Location: Cincinnati, Ohio Posts: 2,911	The H.O.'s did have more compression than normal 305s and a hair bigger cam. __________________ 1974 C25 LWB: 454 4bbl Carb / TH400 / 3.73 1992 Camaro RS 305 TBI

02-23-2005, 10:57 AM	#6
MylilBowTie Right turn Clyde Join Date: Nov 2002 Location: Cincinnati, Ohio Posts: 2,911	L69 1985-88 Type: 90-deg. V-8 Front Longitudinal Displacement: 305 cubic inches (5.0L) Horsepower: 180@4800 RPM Torque: 225@@3200 RPM Max RPM: 5500 Idle RPM: 650 Compression ratio: 9.5:1 Block: Cast Alloy Iron Deck Height: 9.025" Deck Clearance: 0.25" below Bore: 3.740" Stroke: 3.480" Bore Spacing: 4.400" Crankshaft: Nodular Cast Iron Pistons: Cast Aluminum Alloy, flat top Rods: 1037 or 1038 Cast Steel Camshaft: Hydraulic flat tappet Cam lift: .404"/.415" Cam duration @.050: 202/206-deg. Advertised duration: 320/320-deg. Lobe Seperation: 115-deg. Heads: Cast Alloy Iron, 58cc Valve size: 1.84"/1.5" Intake: Cast Aluminum Alloy Carburetor: 795cfm Quadrajet four barrel __________________ 1974 C25 LWB: 454 4bbl Carb / TH400 / 3.73 1992 Camaro RS 305 TBI

02-24-2005, 12:38 AM	#7
Lynx Registered User Join Date: Jun 2003 Location: Fort McMurray, Alberta, Canada Posts: 513	what kind of numbers does a Normal truck 305 put out? __________________ Ben 1983 Silverado SWB 305 2002 Silverado Extended Cab 5.3 http://members.shaw.ca/bkennett

02-24-2005, 01:38 AM	#8
CbHeEaVsYt Pick up man Join Date: Feb 2005 Location: trenton mi Posts: 135	has anyone ever heard of these in our truck cause my truck has to much power to be stock cause i drove my friends which had less miles than mine and mine has way more power j/w cb __________________ heres sum pics of my truck 82 silverado c10 heres my baby 1990 k1500 check out this 1957 chevrolet for sale

02-24-2005, 06:30 AM	#9
MylilBowTie Right turn Clyde Join Date: Nov 2002 Location: Cincinnati, Ohio Posts: 2,911	For the 1984 Sales brochure I have. There are two 305's LF9 (California emission spec) and LF3 (non emissions California spec) Type: V8 OHV Displacement: 5.0 (305 Cu. In.) Bore and stroke 3.74 x 3.48 SAE Net Horsepower: LE9 160 @ 2000 rpm LF3 155 @ 4000 rpm SAE Net Torque: LE9 235 @ 2000 rpm LF3 245 @ 1600 rpm Compression Ratio: LE9 9.2:1 LF3 8.6:1 __________________ 1974 C25 LWB: 454 4bbl Carb / TH400 / 3.73 1992 Camaro RS 305 TBI

02-24-2005, 04:34 PM	#10
stepside454 Registered User Join Date: Nov 2003 Location: st. louis area Posts: 1,551	Cb could have alot to do with gearing, if your truck is 3.73 gear & his is 2.90, yours is going to feel more powerful taking off & around town __________________ 75 GMC C-15 short/step factory 454, lowered

02-24-2005, 05:57 PM	#11
MylilBowTie Right turn Clyde Join Date: Nov 2002 Location: Cincinnati, Ohio Posts: 2,911	Not to pick on civics but they have really low gears and still don't feel any of the torque. I could tell a decent difference going from a rear that had 2.73s to 3.08s. __________________ 1974 C25 LWB: 454 4bbl Carb / TH400 / 3.73 1992 Camaro RS 305 TBI

02-24-2005, 08:25 PM	#13
Boog laying low Join Date: Mar 2001 Location: Searcy, Ark. USA Posts: 13,404	I looked at an 86 Blazer with 305. The guy said it was the HO and the same engine put in the monte SS that year. Special ordered he said. I didn't buy it. __________________ Boog 69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver primer is finer 91 Chevy sportside, Tahoe, Yukon & GMC Crewcab All GM..'nuff said. I stand for the flag and kneel at the cross

02-24-2005, 11:58 PM	#14
edman87 junk collector Join Date: Dec 2004 Location: above Baton Rouge, LA Posts: 693	Never heard of a 305HO, your buddy might be referring to the crossfire 305, which had 2 tbi uints on them, I know these were available in some early to mid 80's camaros, vettes, and montes __________________ '87/89/76 K5 in progress '99 K2500 short crew '91 camaro rs '98 jeep tj '52 willys cj3a

02-25-2005, 01:45 AM	#16
CbHeEaVsYt Pick up man Join Date: Feb 2005 Location: trenton mi Posts: 135	can neone tell me how to identify my drive train so i can figure out y is so darn quick for a little 305???? cb __________________ heres sum pics of my truck 82 silverado c10 heres my baby 1990 k1500 check out this 1957 chevrolet for sale

02-25-2005, 05:07 AM	#17
MylilBowTie Right turn Clyde Join Date: Nov 2002 Location: Cincinnati, Ohio Posts: 2,911	With out looking and decoding what you have you could have. It could be any of the sbc family, 327 - 350 - 283 - 265 - 305 - 400 or whatever someone put in there so it could have a 305 HO but is unlikely that it is. http://www.Mortec.com can be a pretty good friend. There is a casting number on the driver side head next to the firewall where the engine and transmission bolt up at. That will tell you what you have. If its newer it will have 5.0 SGI or 5.7 SGI. If you have trouble finding it http://www.mortec.com/location.htm and the casting numbers page http://www.mortec.com/castnum.htm I use the last 3 numbers and goto the tool bar and use the find option with the last 3 digits to the engine code like 010 for a 3970010 (350) makes it easier and you don't have to look down that whole list or miss it. Transmission will depends on the shape of the pan, number of bolts, if it has a modulator valve and where its located. Any pictures of anything you cant figure out will help a lot also. Type: V8 OHV LS9: light duty emissions LT9 Heavy duty emissions Displacement: 5.7 (350 Cu. In.) Bore and stroke 4.00 x 3.48 SAE Net Horsepower: LS9 165 @ 3800 rpm LT9: 160 @ 3800 rpm SAE Net Torque: LS9 275 @ 1600 rpm LT9 250 @ 2800 rpm Compression Ratio: LS9 8.2:1 LT9 8.3:1 Also for California spec 350 was the LT9 but is rated at 155 horsepower @ 4000 rpm and 240 torque @ 2800 rpm __________________ 1974 C25 LWB: 454 4bbl Carb / TH400 / 3.73 1992 Camaro RS 305 TBI



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02-25-2005, 05:11 AM	#18
MylilBowTie Right turn Clyde Join Date: Nov 2002 Location: Cincinnati, Ohio Posts: 2,911	Your Differential (rear end) is most likely a 10 bolt 8.5 (28 spline axles), you can also decode those with the help of some other members. But it doesn't really help much if the gears have been changed out for a different ratio. __________________ 1974 C25 LWB: 454 4bbl Carb / TH400 / 3.73 1992 Camaro RS 305 TBI

02-25-2005, 01:00 PM	#19
84 PUMPKIN Registered User Join Date: Oct 2004 Location: Alabama Posts: 166	H.o. 305? I have a couple of very interesting photos related to this subject if someone could post them for me.

02-26-2005, 02:07 AM	#20
CbHeEaVsYt Pick up man Join Date: Feb 2005 Location: trenton mi Posts: 135	ok i know this it has OD which means th700r4 it appears to be stock motor but u never know i cant get to the casting numbers right away cause i have it in storage right now but got a chance to drive a day before i qeustioned the motor it says 5.0 305 on the radiator support stock sticker it is a silverado 82. i think it may have been a california truck cause jve never EVER seen that many vacuum lines and before i changed out the stock exaught for duals it had two catylac converters and 2 mufflers its got all the original smog pump and emmisions so unless some just ripped it out of a cali car whole then again u never know ive seen stupider stuff done well that is wat i can remember off the top of my head please tell me if i helped u ne my lil bowtie and i can post those for u 84 pumpkin or anyone in here have intrafan just download that at intrafan.com and u can resize them cb __________________ heres sum pics of my truck 82 silverado c10 heres my baby 1990 k1500 check out this 1957 chevrolet for sale

02-26-2005, 03:19 AM	#21
CbHeEaVsYt Pick up man Join Date: Feb 2005 Location: trenton mi Posts: 135	ok made a mistake the program is IrfanView www.irfanview.com cb __________________ heres sum pics of my truck 82 silverado c10 heres my baby 1990 k1500 check out this 1957 chevrolet for sale

02-26-2005, 03:24 AM	#22
CbHeEaVsYt Pick up man Join Date: Feb 2005 Location: trenton mi Posts: 135	here is a direct link http://quantum.tucows.com/adnload/194967_75076.html cb __________________ heres sum pics of my truck 82 silverado c10 heres my baby 1990 k1500 check out this 1957 chevrolet for sale

02-26-2005, 11:03 AM	#23
MylilBowTie Right turn Clyde Join Date: Nov 2002 Location: Cincinnati, Ohio Posts: 2,911	Here are the pictures I was sent from 84 Pumpkin. What would I would like to see is the paper work on the truck. I've seen the pictures so far, wouldn't mind seeing some more if they are available. I'm still not decided about it just yet. Attached Images __________________ 1974 C25 LWB: 454 4bbl Carb / TH400 / 3.73 1992 Camaro RS 305 TBI

02-26-2005, 11:12 AM	#24
chevyjr73 Registered User Join Date: Mar 2004 Location: chesapeake,virginia Posts: 117	does anyone know where i could buy one of those dual snorkel air cleaners?

02-26-2005, 11:22 AM	#25
MylilBowTie Right turn Clyde Join Date: Nov 2002 Location: Cincinnati, Ohio Posts: 2,911	Im pretty sure gm doesnt make them anymore, might try to find a 83-85 Camaro or Monte Carlo to get one. __________________ 1974 C25 LWB: 454 4bbl Carb / TH400 / 3.73 1992 Camaro RS 305 TBI

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