305 cylinder #14014416 airflow #'s
#1
Junior Member
Thread Starter
Join Date: Sep 2004
Location: delano,ca
Posts: 5
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1983 camaro
Engine: 305
Transmission: 5 speed
305 cylinder #14014416 airflow #'s
hi been following this board awhile need your help looking for airflow #'s on 305 cylinder heads #14014416 ?
#2
Supreme Member
Join Date: Jun 2003
Location: Cypress,Tx
Posts: 1,521
Likes: 0
Received 0 Likes
on
0 Posts
Car: 89 Camaro RS
Engine: 350 carbed now
Transmission: World Class T5
Axle/Gears: Peg Leg w/ 3.73's
I dont know all the numbers but I think they flow 195cfm @ .500 which is pretty good for a stock 305 head. I have them on my 350 with bigger valves and a small amount of work on them and I like them alot.
#3
Junior Member
Thread Starter
Join Date: Sep 2004
Location: delano,ca
Posts: 5
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1983 camaro
Engine: 305
Transmission: 5 speed
thank you IROCaholic looking at maybe using this head on 350 buildup. this head number is easy to find everybody says low performance.if they flow adout 195cfm they are not that bad
#4
Supreme Member
Join Date: Jan 2002
Location: Valley of the Sun
Posts: 3,852
Likes: 0
Received 0 Likes
on
0 Posts
Car: 82 Z28
Engine: Al LT1 headed LG4 305
Transmission: TH350
Axle/Gears: 3.73 posi with spacer
From Kitch:
More 416 flow numbers
I've just finished reflowing my 416 heads with a 1.9" intake valve ( turned down manley 1.94" race flow valve).
Stock 1.84" valve in ported intake
Lift........CFM@ 28"
.05...........29.4
.10...........57.4
.15...........88.3
.20.........122.1
.25.........152.2
.30.........172.9
.35.........188.7
.40.........201.8
.45.........213.3
.50.........217.8
.55.........220.7
Modified 1.9" valve in ported intake
Lift.........CFM@ 28"
.05...........33.0.........+3.6
.10...........65.3.........+7.9
.15...........98.2.........+9.9
.20.........129.8.........+7.7
.25.........158.5.........+6.3
.30.........181.3.........+8.4
.35.........200.4.......+11.7
.40.........217.2.......+15.4
.45.........230.0.......+16.7
.50.........227.2.........+9.4
.55.........221.4.........+0.7
More 416 flow numbers
I've just finished reflowing my 416 heads with a 1.9" intake valve ( turned down manley 1.94" race flow valve).
Stock 1.84" valve in ported intake
Lift........CFM@ 28"
.05...........29.4
.10...........57.4
.15...........88.3
.20.........122.1
.25.........152.2
.30.........172.9
.35.........188.7
.40.........201.8
.45.........213.3
.50.........217.8
.55.........220.7
Modified 1.9" valve in ported intake
Lift.........CFM@ 28"
.05...........33.0.........+3.6
.10...........65.3.........+7.9
.15...........98.2.........+9.9
.20.........129.8.........+7.7
.25.........158.5.........+6.3
.30.........181.3.........+8.4
.35.........200.4.......+11.7
.40.........217.2.......+15.4
.45.........230.0.......+16.7
.50.........227.2.........+9.4
.55.........221.4.........+0.7
#5
Junior Member
Thread Starter
Join Date: Sep 2004
Location: delano,ca
Posts: 5
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1983 camaro
Engine: 305
Transmission: 5 speed
thanks ME LEIGH that will help alot you wouldnt happen to have the stock flow #'s ? i am looking to use heads unported.
#6
Supreme Member
Join Date: Jan 2002
Location: Valley of the Sun
Posts: 3,852
Likes: 0
Received 0 Likes
on
0 Posts
Car: 82 Z28
Engine: Al LT1 headed LG4 305
Transmission: TH350
Axle/Gears: 3.73 posi with spacer
I don't have stock 416 flow #'s but i do have 081 #'s. THey should be very similar considering they are about the same head with center-bolt VC's
Flow chart for stock #14101081 305 head 87 91
Intake lift (in) Flow (cfm) Exhaust lift (in) Flow (cfm) Ratio E/I flow (%)
0.050 31 0.050 15 49
0.100 63 0.100 37 58
0.150 92 0.150 61 67
0.200 116 0.200 78 68
0.250 134 0.250 92 69
0.300 157 0.300 101 64
0.350 170 0.350 105 62
0.400 182 0.400 107 59
0.450 189 0.450 109 58
0.500 195 0.500 110 56
Flow chart for stock #14101081 305 head 87 91
Intake lift (in) Flow (cfm) Exhaust lift (in) Flow (cfm) Ratio E/I flow (%)
0.050 31 0.050 15 49
0.100 63 0.100 37 58
0.150 92 0.150 61 67
0.200 116 0.200 78 68
0.250 134 0.250 92 69
0.300 157 0.300 101 64
0.350 170 0.350 105 62
0.400 182 0.400 107 59
0.450 189 0.450 109 58
0.500 195 0.500 110 56
Trending Topics
#8
Supreme Member
Join Date: Jun 2003
Location: Cypress,Tx
Posts: 1,521
Likes: 0
Received 0 Likes
on
0 Posts
Car: 89 Camaro RS
Engine: 350 carbed now
Transmission: World Class T5
Axle/Gears: Peg Leg w/ 3.73's
Originally posted by ME Leigh
From Kitch:
More 416 flow numbers
I've just finished reflowing my 416 heads with a 1.9" intake valve ( turned down manley 1.94" race flow valve).
Stock 1.84" valve in ported intake
Lift........CFM@ 28"
.05...........29.4
.10...........57.4
.15...........88.3
.20.........122.1
.25.........152.2
.30.........172.9
.35.........188.7
.40.........201.8
.45.........213.3
.50.........217.8
.55.........220.7
Modified 1.9" valve in ported intake
Lift.........CFM@ 28"
.05...........33.0.........+3.6
.10...........65.3.........+7.9
.15...........98.2.........+9.9
.20.........129.8.........+7.7
.25.........158.5.........+6.3
.30.........181.3.........+8.4
.35.........200.4.......+11.7
.40.........217.2.......+15.4
.45.........230.0.......+16.7
.50.........227.2.........+9.4
.55.........221.4.........+0.7
From Kitch:
More 416 flow numbers
I've just finished reflowing my 416 heads with a 1.9" intake valve ( turned down manley 1.94" race flow valve).
Stock 1.84" valve in ported intake
Lift........CFM@ 28"
.05...........29.4
.10...........57.4
.15...........88.3
.20.........122.1
.25.........152.2
.30.........172.9
.35.........188.7
.40.........201.8
.45.........213.3
.50.........217.8
.55.........220.7
Modified 1.9" valve in ported intake
Lift.........CFM@ 28"
.05...........33.0.........+3.6
.10...........65.3.........+7.9
.15...........98.2.........+9.9
.20.........129.8.........+7.7
.25.........158.5.........+6.3
.30.........181.3.........+8.4
.35.........200.4.......+11.7
.40.........217.2.......+15.4
.45.........230.0.......+16.7
.50.........227.2.........+9.4
.55.........221.4.........+0.7
#9
Supreme Member
Join Date: Jun 2001
Location: Calgary, Alberta, Republic of Western Canada
Posts: 3,238
Likes: 0
Received 4 Likes
on
4 Posts
Car: 1986 Sport Coupé
Engine: 305-4v
Transmission: 700R4 and TransGo2
Those cheap 305 heads make for a darned good home port and polish project for your average smallblock, eh?
#10
Supreme Member
Join Date: Jun 2003
Location: Cypress,Tx
Posts: 1,521
Likes: 0
Received 0 Likes
on
0 Posts
Car: 89 Camaro RS
Engine: 350 carbed now
Transmission: World Class T5
Axle/Gears: Peg Leg w/ 3.73's
It defenetly makes me think about taking mine off and doing a little bit of work on the intake and exhaust ports later down the road. Hey how much flow do you think these heads pick up with just the addition of the bigger valves just out of curiosity? Would you say about 10 cfm's or so?
#11
Junior Member
Thread Starter
Join Date: Sep 2004
Location: delano,ca
Posts: 5
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1983 camaro
Engine: 305
Transmission: 5 speed
thanks for the info IROCaholic just curious how close the flow #'s were to a set of 186 heads that i have now looking for cheap set of head readily available was thinking of having 1.94 intakes put in heads have to be stock ports no port work or ginding marks also we have to run a restrictor plate with 15/16 holes & a holley 4412 500 cfm carb.the number for stock 416 if are at 195cfm @ .550 lift would not be that bad ?
#13
Supreme Member
iTrader: (13)
NHRA Stock and Superstock guys run HUGE duration cams (stock lift is what they are limited to) on stock runner 416 and 081 heads with great results. i'm talking like 250+ @ .050 on a 106 or SHORTER lsa! rich aman is running them in his 86 sportcoupe (rich is the H/Stock record holder) with some ridiculous cam specs and has been 10.98 @ 120mph! stock 9.5:1c/r, approved pistons/rods/crank, no more than .060 over 305 block, stock 416 heads with stock size valves, though you can run any angles on the back of the valve you want.
#14
Supreme Member
good thread
wow you opted ot leave the 1.84 valves in them ?
really ?
interesting
i always have stock 1.94's and z-28 springs put on them since its cheap to have done
good thead
is there a way to compare the numbers from these heads to any others, just to get an idea of how good they flow ?
or ?
just curious
the numbers dont really mean much if you dont know how well other heads flow
you know,
thanks
wow you opted ot leave the 1.84 valves in them ?
really ?
interesting
i always have stock 1.94's and z-28 springs put on them since its cheap to have done
good thead
is there a way to compare the numbers from these heads to any others, just to get an idea of how good they flow ?
or ?
just curious
the numbers dont really mean much if you dont know how well other heads flow
you know,
thanks
#16
Supreme Member
iTrader: (11)
Join Date: Oct 2007
Location: Wyoming
Posts: 1,371
Likes: 0
Received 4 Likes
on
2 Posts
Car: 1995 Formula
Engine: LT1 350
Transmission: Built 4L60e
Axle/Gears: 10 bolt, Eaton posi, 3.73's
Re: 305 cylinder #14014416 airflow #'s
Wow I was reading a pretty old thread. Good information, though.
#17
Member
iTrader: (2)
Join Date: Sep 2006
Location: Greater D.C. area.
Posts: 440
Likes: 0
Received 0 Likes
on
0 Posts
Car: 89 Camaro RS
Engine: LO3 TBI
Transmission: 700R4 => WC T-5
Axle/Gears: 3.42 Open Diff
Re: 305 cylinder #14014416 airflow #'s
I've always been perplexed by the 416/081 heads, given how crappy the exhaust flow is.
#18
Member
Join Date: Jan 2008
Location: Camarillo, California
Posts: 104
Received 0 Likes
on
0 Posts
Car: 1990 RS Camaro
Engine: 1990 305 tbi lo3
Transmission: 700R4
Re: 305 cylinder #14014416 airflow #'s
So I am curious about the head numbers... here is why, looking through the Classic Industries catalog the replacement engine page lists #081, 187 for the heads, on several years (3rd gen) for both TPI and TBI. Are LO3 heads 081 or 187, or are both numbers apart of the same head? Didnt want to start a new thread since this one involves my questionable numbers.
#20
On Probation
Join Date: Oct 2008
Location: Northern Utah
Posts: 6,319
Likes: 0
Received 17 Likes
on
17 Posts
Car: seeking '90.5-'92 'bird hardtop
Engine: several
Transmission: none
Axle/Gears: none
Re: 305 cylinder #14014416 airflow #'s
I don't have stock 416 flow #'s but i do have 081 #'s. THey should be very similar considering they are about the same head with center-bolt VC's
Flow chart for stock #14101081 305 head 87 91
Intake lift (in) Flow (cfm) Exhaust lift (in) Flow (cfm) Ratio E/I flow (%)
0.050 31 0.050 15 49
0.100 63 0.100 37 58
0.150 92 0.150 61 67
0.200 116 0.200 78 68
0.250 134 0.250 92 69
0.300 157 0.300 101 64
0.350 170 0.350 105 62
0.400 182 0.400 107 59
0.450 189 0.450 109 58
0.500 195 0.500 110 56
Flow chart for stock #14101081 305 head 87 91
Intake lift (in) Flow (cfm) Exhaust lift (in) Flow (cfm) Ratio E/I flow (%)
0.050 31 0.050 15 49
0.100 63 0.100 37 58
0.150 92 0.150 61 67
0.200 116 0.200 78 68
0.250 134 0.250 92 69
0.300 157 0.300 101 64
0.350 170 0.350 105 62
0.400 182 0.400 107 59
0.450 189 0.450 109 58
0.500 195 0.500 110 56
On the intake side of the 416 heads, with stock valves cleaned up, the number averaged 185 cfm maximum.
Thread
Thread Starter
Forum
Replies
Last Post
NinjaNife
Tech / General Engine
27
08-23-2015 11:49 AM