Big Problem...Whats Wrong
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Member
Joined: Sep 2001
Posts: 410
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From: Burlington, NC USA
Big Problem...Whats Wrong
Hey guys. Look in my sig. for info.
My car, when driven on the highway, and especially in the summer, drops oil pressure to 30, sometimes below. It idles around 30 too, but lower after it has already ran for a while. It fluxuates a little, depending on your RPM. In park, if you rev to about 4500 RPM, it almost hits 60. What could be the problem?
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1987 Camaro Sport Coupe 305 V8 LG4-rebuilt-All Stock.
My car, when driven on the highway, and especially in the summer, drops oil pressure to 30, sometimes below. It idles around 30 too, but lower after it has already ran for a while. It fluxuates a little, depending on your RPM. In park, if you rev to about 4500 RPM, it almost hits 60. What could be the problem?
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1987 Camaro Sport Coupe 305 V8 LG4-rebuilt-All Stock.
Supreme Member
Joined: Jan 2001
Posts: 7,164
Likes: 1
From: Someone owes me 10,000 posts
Car: 99 Formula
Engine: LS1
Transmission: T56
Axle/Gears: 342
Nothing is wrong, as a rule of thumb every 1000rpm divide by 100. Your pressure will drop after it warms up because the oil thins out.
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"Rice burners are like tampons...Every pu$$y has to have one"
'86 IROC
T-TOPS, TINTED WINDOWS, BRAKE LIGHT BLACKOUTS
GM GOODWRENCH 350
EDELBROCK TES HEADERS
3" Hooker CatBack w/Aero Chamber muffler
EDELBROCK 600CFM CARB.
KN AIRFILTER
ACCEL HEI DISTRIBUTOR
160* Stat, just switched to 180* b/c of winter coming and going to college in the mts.
3:73 Posi
Rebuilt 700R4
B&M Megashifter, 5" Autometer Tach w/shift lite
------------------
"Rice burners are like tampons...Every pu$$y has to have one"
'86 IROC
T-TOPS, TINTED WINDOWS, BRAKE LIGHT BLACKOUTS
GM GOODWRENCH 350
EDELBROCK TES HEADERS
3" Hooker CatBack w/Aero Chamber muffler
EDELBROCK 600CFM CARB.
KN AIRFILTER
ACCEL HEI DISTRIBUTOR
160* Stat, just switched to 180* b/c of winter coming and going to college in the mts.
3:73 Posi
Rebuilt 700R4
B&M Megashifter, 5" Autometer Tach w/shift lite
Supreme Member
Joined: Dec 2000
Posts: 3,813
Likes: 2
From: California
Oh man, you've got big problems. It seems that your crankshaft is spinning out of control, causing your camshaft, distributor, and oil pump to speed up. If this continues, your engine may only last a few hundred thousand miles. If you want to get rid of this fluxuating oil pressure problem, you could try draining your oil and filling your crankcase with roofing tar. That should keep the problem at bay.
Supreme Member
Joined: Jul 1999
Posts: 18,457
Likes: 16
From: Loveland, OH, US
Car: 4
Engine: 6
Transmission: 5
Those oil pressure numbers don't sound bad at all to me, especially not if you're stuck with a 2.73 gear to where your RPM is like 1500 on the highway.
The rule of thumb racers use for minimum acceptable OP is 10 psi per 1000 RPM. So really, if it's 30 psi at 3000 RPM, you're OK. In fact, older small blocks mostly had a pump with a 35 psi regulator spring in it.
If the motor isn't in any kind of low OP distress (clattering lifters, rapidly & severely blackened & burned oil, oil on the dipstick smoking hot, etc.) then you have enough. I think your numbers are adequate.
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"So many Mustangs, so little time..."
ICON Motorsports
The rule of thumb racers use for minimum acceptable OP is 10 psi per 1000 RPM. So really, if it's 30 psi at 3000 RPM, you're OK. In fact, older small blocks mostly had a pump with a 35 psi regulator spring in it.
If the motor isn't in any kind of low OP distress (clattering lifters, rapidly & severely blackened & burned oil, oil on the dipstick smoking hot, etc.) then you have enough. I think your numbers are adequate.
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"So many Mustangs, so little time..."
ICON Motorsports
Thread Starter
Member
Joined: Sep 2001
Posts: 410
Likes: 0
From: Burlington, NC USA
Sweet. I thought that was way too low, but i guess it is doing good.
To the second response: Funny, very ****ing funny. LOL
Thanks guys.
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1987 Camaro Sport Coupe 305 V8 LG4-rebuilt-All Stock.
To the second response: Funny, very ****ing funny. LOL
Thanks guys.
------------------
1987 Camaro Sport Coupe 305 V8 LG4-rebuilt-All Stock.
Supreme Member
Joined: Jan 2001
Posts: 7,164
Likes: 1
From: Someone owes me 10,000 posts
Car: 99 Formula
Engine: LS1
Transmission: T56
Axle/Gears: 342
Quote:"Oh man, you've got big problems. It seems that your crankshaft is spinning out of control, causing your camshaft, distributor, and oil pump to speed up. If this continues, your engine may only last a few hundred thousand miles. If you want to get rid of this fluxuating oil pressure problem, you could try draining your oil and filling your crankcase with roofing tar. That should keep the problem at bay."
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As I started to read this I was like what the he!! is this guy talking about, I guess it pays to read everything.
------------------
"Rice burners are like tampons...Every pu$$y has to have one"
'86 IROC
T-TOPS, TINTED WINDOWS, BRAKE LIGHT BLACKOUTS
GM GOODWRENCH 350
EDELBROCK TES HEADERS
3" Hooker CatBack w/Aero Chamber muffler
EDELBROCK 600CFM CARB.
KN AIRFILTER
ACCEL HEI DISTRIBUTOR
160* Stat, just switched to 180* b/c of winter coming and going to college in the mts.
3:73 Posi
Rebuilt 700R4
B&M Megashifter, 5" Autometer Tach w/shift lite
-------------------------
As I started to read this I was like what the he!! is this guy talking about, I guess it pays to read everything.
------------------
"Rice burners are like tampons...Every pu$$y has to have one"
'86 IROC
T-TOPS, TINTED WINDOWS, BRAKE LIGHT BLACKOUTS
GM GOODWRENCH 350
EDELBROCK TES HEADERS
3" Hooker CatBack w/Aero Chamber muffler
EDELBROCK 600CFM CARB.
KN AIRFILTER
ACCEL HEI DISTRIBUTOR
160* Stat, just switched to 180* b/c of winter coming and going to college in the mts.
3:73 Posi
Rebuilt 700R4
B&M Megashifter, 5" Autometer Tach w/shift lite
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