i6 300 specs
Thread Starter
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New User
Joined: Nov 2003
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i6 300 specs
Hi,
I using Dyno2000 to evaluate changes to my 1979 Ford F150
I6 300. In particular, I would like to know things like the stock
compression ratio and the stock cam duration/lift.
If anyone has done this before or has this information that
would great!
Thanks.
I using Dyno2000 to evaluate changes to my 1979 Ford F150
I6 300. In particular, I would like to know things like the stock
compression ratio and the stock cam duration/lift.
If anyone has done this before or has this information that
would great!
Thanks.
Senior User
Joined: Sep 2003
Posts: 497
Likes: 0
From: Houston TX
They varied to the year. Some were 8.4, some early ones 8.0, some 8.8 . It's between 8.4 and 8.8 anyway... Hopefully someone else will chime in with better info.
The only stock cam info I have shows .2490 for both intake and exhaust lobes. MK
The only stock cam info I have shows .2490 for both intake and exhaust lobes. MK
Cargo Master
Joined: Sep 2001
Posts: 3,135
Likes: 0
From: Canada
bore 4.00
stroke 3.980
compression 8.5
induction flow 200cfm
intake valves 1.781
exhaust 1.560
thats what i came up with and when done rite the dyno says 140hp and and 240 lbs torque which is about right for the 300
stroke 3.980
compression 8.5
induction flow 200cfm
intake valves 1.781
exhaust 1.560
thats what i came up with and when done rite the dyno says 140hp and and 240 lbs torque which is about right for the 300
Junior User
Joined: Aug 2003
Posts: 69
Likes: 0
From: Burlington, West Virginia
can you tell me how much hp and torque i am getting out of my 300.
4.03 bore
3.98 stroke
500 cfm carb
.015 head shave
204/216 Adv. Dur. Int./Exh.
.458 intake lift
.487 exhaust lift
and stock valves
Thanks, i would appreciate it
D.J
4.03 bore
3.98 stroke
500 cfm carb
.015 head shave
204/216 Adv. Dur. Int./Exh.
.458 intake lift
.487 exhaust lift
and stock valves
Thanks, i would appreciate it
D.J
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New User
Joined: Nov 2003
Posts: 5
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Hi,
I get 125hp@3000rpm with 234ft/lb@2000rpm for the stock
i6 300. With your new specs, I get 160hp@3500 and 260ft/lb
@3000rpm, but there is not enough cam information.
I calculated that the new compression ratio would be 8.7:1. In
order to get better cam curves, I need to also know the lobe
center of your cam. That way, I can calculate other parameters.
Does anyone know the specific cam details on a stock i6 300? In
particular, the intake duration, exhaust duration and lobe center?
Thanks.
I get 125hp@3000rpm with 234ft/lb@2000rpm for the stock
i6 300. With your new specs, I get 160hp@3500 and 260ft/lb
@3000rpm, but there is not enough cam information.
I calculated that the new compression ratio would be 8.7:1. In
order to get better cam curves, I need to also know the lobe
center of your cam. That way, I can calculate other parameters.
Does anyone know the specific cam details on a stock i6 300? In
particular, the intake duration, exhaust duration and lobe center?
Thanks.
Thread Starter
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New User
Joined: Nov 2003
Posts: 5
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Sure, just give me the ratio of the stock 300 and the answer is
just a couple of mouse clicks away....
just a couple of mouse clicks away....
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Elder User
Joined: Mar 2003
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From: Colorado
Welcome to FTE, (DG)
I believe the stock rocker ratio is 1.6. ('been looking into changing it - and thats what other posts are saying).
If it's just a few mouseclicks, would you mind running my numbers? I have a stock cam and the rest of my engine numbers are in my sig., below.
Thanks, Broncr
I believe the stock rocker ratio is 1.6. ('been looking into changing it - and thats what other posts are saying).
If it's just a few mouseclicks, would you mind running my numbers? I have a stock cam and the rest of my engine numbers are in my sig., below.
Thanks, Broncr
Last edited by broncr; Nov 14, 2003 at 08:16 PM.
Posting Guru
Joined: Sep 1999
Posts: 1,022
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From: Pensacola Florida
Something doesn't seem right with those numbers. Is .249 the lift of a stock cam at the lifter? If so then the vavle lift would be .398 and using the 1.75:1 rockers would yield .436 at the valve or a gain of .038. That is a good increase in lift and I would expect a lot more than two HP. can you check it again please.
Elder User
Joined: Mar 2003
Posts: 628
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From: Colorado
I'm with ya Darkman. Actual valve opening is close to .400 - stock,
and my SOTP meter says I've got around 200 horsies, at least.
I imagine there's not a program alotment for port, polish, & mate, and since flow = HP on the 300, there's room for wiggle. A quality engine ballance does wonders too- less horsetheivin'...
My thanks for running the numbers anyway. I'll probably never have it dyno'd.
Broncr
and my SOTP meter says I've got around 200 horsies, at least.
I imagine there's not a program alotment for port, polish, & mate, and since flow = HP on the 300, there's room for wiggle. A quality engine ballance does wonders too- less horsetheivin'...
My thanks for running the numbers anyway. I'll probably never have it dyno'd.
Broncr