fast 300
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Joined: May 2001
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fast 300
I just bought a new Cifford four barrel intake manifold at the Pamona Antique auto show, and it was only $125. Is this a good deal? It is brand new, no signs of wear.
my truck is a 75, and mostly stock except for a high flow cat and a cherry bomb glass pack. The cam might be a little larger then stock, but I am not sure of what was put in when the engine was rebuilt.
my question is, is what is the fastest anyone has gotten their 300 to go? mine shakes too much at 90 going down hill, about 85 on flat ground. Also, at 3500 rpm my truck sounds like it is going to die in first and second (three speed)
will this change with the headers and intake?
my truck is a 75, and mostly stock except for a high flow cat and a cherry bomb glass pack. The cam might be a little larger then stock, but I am not sure of what was put in when the engine was rebuilt.
my question is, is what is the fastest anyone has gotten their 300 to go? mine shakes too much at 90 going down hill, about 85 on flat ground. Also, at 3500 rpm my truck sounds like it is going to die in first and second (three speed)
will this change with the headers and intake?
Postmaster
Joined: Jul 2001
Posts: 4,038
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From: South Kitsap County, WA
fast 300
Ultimately the top end of a vehicle depends on the gearing and horse power. If you had a five speed with a 2.73 rear, for example you may end up with a top end well over 100 mph.
Posting Guru
Joined: Mar 2002
Posts: 1,098
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From: CA
fast 300
I had my '95 up to 110, which I beleive is when the fuel cutoff occurs. I know this because the engine actually SHUT OFF. I was westbound on I-90, coming down the Cascade mountains on a looooong straightaway, downhill with-get this-sammy davis jr's "candyman" on the radio! What a terrible song to top out my truck to! haha oh well.
Senior User
Joined: Dec 2001
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fast 300
I've never pushed my 1988 past 90mph, but I towed 2 jet skis to Biloxi for the 4th of July and ran 80 and 85 mph, the whole way, using 4th gear. RPMS as I recall were around 33-3500. It sucked up some serious gas (10-12 miles per gallon) but started running smoother after a few hundred miles. It smoothed out and runs like a Cadillac now! It was the 1st high speed run in a LONG time (I'm a 65 mph driver normally) and I think it runs smoother now. For an 88 that is high speed! They're comfortable trucks.
Post Fiend
Joined: Jan 2000
Posts: 5,330
Likes: 17
From: Dryden, ON, Canada
fast 300
My 82 will hold 3000 rpm(~98 mph) at half throttle.... Mind you, the 300 is far from stock, and, I do have 2.75 gears... It had more to go, but, I didn't feel like really opening it up...
Evan
85 F250 HD XLT Lariat 4x4:
460/T19/NP 208(I think) 3.55 geared Full Floater 10.25 and a Dana 50 TTB
1982 F100 SWB
300 HD: NP 435/2.75 geared 9"
78 F150, 351M/C6, soon to be repowered with a 400
Evan
85 F250 HD XLT Lariat 4x4:
460/T19/NP 208(I think) 3.55 geared Full Floater 10.25 and a Dana 50 TTB
1982 F100 SWB
300 HD: NP 435/2.75 geared 9"
78 F150, 351M/C6, soon to be repowered with a 400
Senior User
Joined: May 2002
Posts: 310
Likes: 0
fast 300
5th gear at 110mph when the fuel shut off kicked in...I'm sure it was realy going a little bit faster since i have larger then stock tires so the ECM would think I'm actualy not going as fast.
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Postmaster
Joined: May 2002
Posts: 3,241
Likes: 3
From: Broken Arrow, OK
fast 300
How long did it take to get to 110? My 90 struggles to get to 85, but is one of the fastest EFI 4.9's I know of in teh quarter mile. It has the 5 speed and 3.08 gears.
Also, how do you know you were going 110? The speedo on my 90 and my 95 both stop at 85. Is there an optional speedometer available?
Also, how do you know you were going 110? The speedo on my 90 and my 95 both stop at 85. Is there an optional speedometer available?
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Post Fiend
Joined: Nov 2001
Posts: 14,947
Likes: 6
From: Topsfield, MA
fast 300
How do you know you're going that fast when the speedo only goes up to 85mph...........mine shuts off at 90.
Primary rig is Green Thunder:
95' F-150 XLT 4x4, 302, 5 spd, MSD 6A, Flowmaster American Thunder Exhaust, Sunroof, Clear corners w/ Diamond headlights, CD player with 2 10" subs and some 32" BFG Muds
.
Check out my Gallery for a look-see.
Then theres:
99' Mustang GT 4.6L
88' F-250 Heavyduty 4x4 351/c6
95' Mercury Cougar 4.6L V-8
80' E-350 300/6 with a
3 spd column shifter. Weighs around 7,000lbs w. 65mph top speed, who wants to race me!
Primary rig is Green Thunder:
95' F-150 XLT 4x4, 302, 5 spd, MSD 6A, Flowmaster American Thunder Exhaust, Sunroof, Clear corners w/ Diamond headlights, CD player with 2 10" subs and some 32" BFG Muds
.Check out my Gallery for a look-see.
Then theres:
99' Mustang GT 4.6L
88' F-250 Heavyduty 4x4 351/c6
95' Mercury Cougar 4.6L V-8
80' E-350 300/6 with a
3 spd column shifter. Weighs around 7,000lbs w. 65mph top speed, who wants to race me!
Senior User
Joined: May 2002
Posts: 310
Likes: 0
fast 300
>How do you know you're going that fast when the speedo only
>goes up to 85mph...........mine shuts off at 90.
>
90? Hmm thats not right. had my girlfriend in her 911 next to me so I know how fast I was going
>goes up to 85mph...........mine shuts off at 90.
>
90? Hmm thats not right. had my girlfriend in her 911 next to me so I know how fast I was going
Senior User
Joined: Jul 2001
Posts: 470
Likes: 0
fast 300
As for how long it took, it took a bit. I was already doin 80 when I started speeding up for real, and I never shifted out of fourth (I was well above 4k on the speedo, so shifting would have made me faster anyway).
-=Whittey=-
-=Whittey=-
Freshman User
Joined: May 2002
Posts: 28
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From: St. Charles USA
fast 300
My '78 3-speed manual will still do at least 85, even with a one barrel stock 300 (no rebuild) with 217,000 miles. I had the speedo straight down when I first got in in '87 once (on the 'P' of MPH on the 85 MPH speedo) as a teen on the backroads in SW Missouri, I'll never do that again. I'm sure my 0-60 time is not impressive nor the quarter but the truck cruises on the interstate at 65-75 with ease, I have no idea how many RPMs, no tach.