Need help with jerking
07-21-2006, 03:20 PM
#11
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RE: Need help with jerking
ORIGINAL: Derf00
You said you just bought the car, was it a DD or a track car?
If its a track car, the clutch is probably in need of replacment and the cam in the car is way to aggressive for DD which is what gives you the lopey idle. Find out what kind of cam or the durations of the cam to get a better idea.
You said you just bought the car, was it a DD or a track car?
If its a track car, the clutch is probably in need of replacment and the cam in the car is way to aggressive for DD which is what gives you the lopey idle. Find out what kind of cam or the durations of the cam to get a better idea.
07-21-2006, 03:21 PM
#12
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RE: Need help with jerking
ORIGINAL: LTnone
Check your MAF- if that's not working properly the engine will run rough. Also your ignition module. Good luck
Check your MAF- if that's not working properly the engine will run rough. Also your ignition module. Good luck
07-21-2006, 04:03 PM
#13
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RE: Need help with jerking
It was a DD, but has been to the track before some of the mods. When he replaced the tranny (new from Jegs), he also replaced the clutch. It ran 9.1 in 1/8 at time on street tires, no idea what it will do now. I was told around 8k was put into the engine, but anyone will tell you anything to make something look better.
07-21-2006, 04:36 PM
#14
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RE: Need help with jerking
ORIGINAL: Hawk
If its an 88 and not a california car the car will have speed density. Unless it was upgraded to MAF and just not one of the listed mods. Not sure, but if the car is still running speed density and you have all those performance mods, that might be giving you some of your trouble, especially with the idle issues you are describing. Just me 2 cents.
If its an 88 and not a california car the car will have speed density. Unless it was upgraded to MAF and just not one of the listed mods. Not sure, but if the car is still running speed density and you have all those performance mods, that might be giving you some of your trouble, especially with the idle issues you are describing. Just me 2 cents.
07-21-2006, 07:19 PM
#16
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RE: Need help with jerking
I was mistaken about the time. I wasn't the one that ran it. It was the previous owner. He says he has the timeslip....was 8.46, without launching hard........Put a complete new MSD distributor on it and it ironed the idle out quite a bit. I have had other 5.0 5 speeds and never jerked as this one does. But the distributor helped that somewhat also. Thinking I may need to upgrade my MAF.
07-21-2006, 07:39 PM
#17
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RE: Need help with jerking
lets forget about the whole speed density hickups (as thats a big problem here as well) and consintrate on the basics. its more appearent here rather than more race orientated sites because most people are modifing there first car and dont know as muxh about performance angine building or blueprinting. i will tell you what the problem is
YOUR CAM IS TO GOD DAMN BIG!
i say this because when you look into a cam spec's it says you need to run a higher stall converter in an auto. what this means is the tranny slips to a higher rpm before ingaging because the duration of the cam is not ment for low end power, meaning it will chug as it cannot make the required torque. what does this mean on a stick car? it means you must launch at a higher rpm and keep the engine at a higher rpm either by using higher gears or by slipping the clutch. you are supposed to never let that cam run under 2800 rpm, but anything above 1500 rpm is usally fine for drivability.
YOUR CAM IS TO GOD DAMN BIG!
i say this because when you look into a cam spec's it says you need to run a higher stall converter in an auto. what this means is the tranny slips to a higher rpm before ingaging because the duration of the cam is not ment for low end power, meaning it will chug as it cannot make the required torque. what does this mean on a stick car? it means you must launch at a higher rpm and keep the engine at a higher rpm either by using higher gears or by slipping the clutch. you are supposed to never let that cam run under 2800 rpm, but anything above 1500 rpm is usally fine for drivability.
07-21-2006, 08:00 PM
#18
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Join Date: Feb 2006
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RE: Need help with jerking
ORIGINAL: mrbigshot
lets forget about the whole speed density hickups (as thats a big problem here as well) and consintrate on the basics. its more appearent here rather than more race orientated sites because most people are modifing there first car and dont know as muxh about performance angine building or blueprinting. i will tell you what the problem is
YOUR CAM IS TO GOD DAMN BIG!
i say this because when you look into a cam spec's it says you need to run a higher stall converter in an auto. what this means is the tranny slips to a higher rpm before ingaging because the duration of the cam is not ment for low end power, meaning it will chug as it cannot make the required torque. what does this mean on a stick car? it means you must launch at a higher rpm and keep the engine at a higher rpm either by using higher gears or by slipping the clutch. you are supposed to never let that cam run under 2800 rpm, but anything above 1500 rpm is usally fine for drivability.
lets forget about the whole speed density hickups (as thats a big problem here as well) and consintrate on the basics. its more appearent here rather than more race orientated sites because most people are modifing there first car and dont know as muxh about performance angine building or blueprinting. i will tell you what the problem is
YOUR CAM IS TO GOD DAMN BIG!
i say this because when you look into a cam spec's it says you need to run a higher stall converter in an auto. what this means is the tranny slips to a higher rpm before ingaging because the duration of the cam is not ment for low end power, meaning it will chug as it cannot make the required torque. what does this mean on a stick car? it means you must launch at a higher rpm and keep the engine at a higher rpm either by using higher gears or by slipping the clutch. you are supposed to never let that cam run under 2800 rpm, but anything above 1500 rpm is usally fine for drivability.
07-22-2006, 03:00 AM
#19
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Join Date: Apr 2006
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Posts: 176
RE: Need help with jerking
ORIGINAL: mrbigshot
lets forget about the whole speed density hickups (as thats a big problem here as well) and consintrate on the basics. its more appearent here rather than more race orientated sites because most people are modifing there first car and dont know as muxh about performance angine building or blueprinting. i will tell you what the problem is
YOUR CAM IS TO GOD DAMN BIG!
i say this because when you look into a cam spec's it says you need to run a higher stall converter in an auto. what this means is the tranny slips to a higher rpm before ingaging because the duration of the cam is not ment for low end power, meaning it will chug as it cannot make the required torque. what does this mean on a stick car? it means you must launch at a higher rpm and keep the engine at a higher rpm either by using higher gears or by slipping the clutch. you are supposed to never let that cam run under 2800 rpm, but anything above 1500 rpm is usally fine for drivability.
lets forget about the whole speed density hickups (as thats a big problem here as well) and consintrate on the basics. its more appearent here rather than more race orientated sites because most people are modifing there first car and dont know as muxh about performance angine building or blueprinting. i will tell you what the problem is
YOUR CAM IS TO GOD DAMN BIG!
i say this because when you look into a cam spec's it says you need to run a higher stall converter in an auto. what this means is the tranny slips to a higher rpm before ingaging because the duration of the cam is not ment for low end power, meaning it will chug as it cannot make the required torque. what does this mean on a stick car? it means you must launch at a higher rpm and keep the engine at a higher rpm either by using higher gears or by slipping the clutch. you are supposed to never let that cam run under 2800 rpm, but anything above 1500 rpm is usally fine for drivability.
07-22-2006, 04:19 AM
#20
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Join Date: Jul 2006
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Posts: 845
RE: Need help with jerking
it wont damage the engine at all.it just makes driving the car more of a chore. the only bad thing is that you will be slipping the cluch more on takeoff so its going to be harder on the clutch disk and will glaze the flywheel faster.
