272 cam install

[gixer]

ive recently put comp cams in my 92 eagle talon since the head had to come off because the head gasket blew. the car was tuned before but now the car doesnt idle and reads insane amount of knock around 4000 rpm no matter if i richen it or lean it. i didnt install cam gears. i tried to get timing the best i could and played with the super afc for an hour or so but nothing i seem to do works. i have reading but im not on my home computer. Tips would be very helpful. thanks

 

[awdrst]

I would do a boost leak test. After that I would check over your timing belt and make sure all the timing marks line up.

 

[awd92lesky]

the marks for the timing are definatly lined up. The car doesnt miss or back fire like it would if the timing marks were off. im 100% sure that the marks are lined up. it could very well be a boost leak because the one pipe running to the side mount is a pain to get on so it may not be on all the way. ill take a look tomorrow. Thanks for the reply

 

[weith1111]

CAS installed 180* out of phase?

Base timing isn't at 5* BTDC?

Did you install new lifters/do they make noise?

Do you have an upgraded fuel pump?

Those are my immediate questions.

 

[awd92lesky]

i didnt install new lifters because they never made any noise and i have a walbaro 255 fuel pump. The cam angle sensor may be outta phase and base timing may not be at 5*. This is the first time ive had the car mostly torn apart. The owner before me did all the bolt ons but never really did internals of the motor. if my cam angle sensor which is the little round sensor on the left side of the motor is off how do i adjust and i would get the readings off my logger, and how would i know if my base timing is off. the first time i had my friend tune it for me and now im trying to figure it out myself. All advise is appricated.

The car has an evo big 16g turbo,560cc injectors, 255 walbaro fuel pump, pacesetter header, air intake, coil pack ignition, modified side mount, 2g mafs, super afc, scanmaster 2, datalogger with mmcd program. i may be leaving things out.

 

[weith1111]

http://www.plymouthlaser.com/timin.htm

Your base timing being way off will skew the timing readings you are getting on your logger, make your car run like crap, boost like crap, and overall be a reason for a host of other things seeming not normal...like weird knock counts.

Start there and then report back and we can help get your AFC settings straight.

 

[awd92lesky]

my base timing is probley off. i saw the mark on the pulley but im not sure where it was suppose to be repositioned. i dont have spark plug wires i have a coil pack ignition setup so i how would i be able to check my timing?

 

[weith1111]

Um...we all have coil packs. Are you saying you have coil on plug ignition? If so...I'm not sure. I'd start searching around for setting base timing with a COP setup. I don't remember the topic ever coming up.

 

[fhudsonjr]

I have always heard that new cams should always have new lifters installed also. The lifters take a certain wear pattern w/the cam. Using old lifters with a new or different cam will give you bad wear patterns and possibly cause your cam to be bad. I'd sure take a look at those cams.

 

[Black94DSM]

I have always heard that new cams should always have new lifters installed also. The lifters take a certain wear pattern w/the cam. Using old lifters with a new or different cam will give you bad wear patterns and possibly cause your cam to be bad. I'd sure take a look at those cams.

You mean Rockers, not lifters. This would be true if we used flat tappet rockers, but ours are roller. Just inspect the rockers before you put them back in, they will be fine if you reuse them.

 

[JNperformance]

I see your profile (black94dsm) and you only have 280 hp and 290 tq with that setup? I have similar setup with 272 bc cams. I would think you be alot faster and more power. How much boost are you running?

 

[Rob10_99]

He was probly running 15psi, two years ago.

 

[1992awdlaser]

If it is a coil on plug set up lay the pickup on the #1 coil and it should work. Or you could try this way which I found on DSMLink forums: Just put the signal pickup over the wire going into the first coil. Just cause its 14 gauge dont let it fool you that you cant get a signal from it. And i dont mean you have to grab it up at the coil connector either...back where the wire exits between the VC and cop plate is just as good.