Death toll rises to 47

[brandboZ28]

Everyone say a little prayer for the 4 pushrods that lost their life while serving a good cause this evening. :wtfgun:

[redmach1]

Holy shit...... there goes the lifter thoery.

[brandboZ28]

I watched them bend right before my eyes by turning the crank over by hand. With only 4 bending, I might have lashed the bitches to tight. I just dont know!!!

[redmach1]

Did the springs go into bind on those that bent? How many threads are showing on top of the rocker arm nut?

[brandboZ28]

If they didnt, it was very, VERY close which doesnt make sence since the lift on the cam was back to .510 with the 1.5 rockers. GRRRRRRR!!!!! I DONT GET IT.

[redmach1]

If it looked REAL close, then you might have coil bind causing this.

[brandboZ28]

I checked the installed heigth if the springs and in it right on the money still. I guess Ill just suck it up and buy some good springs and new pushrods. Damn this sucks.

[redmach1]

Got this from the comp cams site:

8. Once the valve springs have been installed, it is important to check for coil bind. This means that when the valve is fully open there must be a minimum of .060" clearance between the coils of both the inner and outer springs. If this clearance does not exist, you must change either the retainer or the valve to gain more installed height, or change to a spring that will accommodate more lift or machine the spring seat for extra depth.

Do you think that the coils are getting tighter than .060"?

[brandboZ28]

Thats got to be it but I just dont understand why its doing it with the stock rocker arms. This is very frustrating to me. Thanks for the help Todd, Ill call and order the valve springs tomorrow, that way Ill be set for when I put in a bigger cam, which I should just do the first time but that would be to easy:lol:

[97TA]

are you using all the same valvetrain components mark had? If you are I don't see how you could have coilbind while he didn't unless for some reason the installed height was different. What is the part number for the springs you have now?

[redmach1]

Get the retainers and locks too, if you can. I am not sure that there isn't a problem there. Do lt1's use spacers under the valve springs like fords do?

[brandboZ28]

Heres the link to Thunder racing's catalog. They are the very top one, pn 91-235-D. (http://www.thunderracing.com/index.cfm?fuseaction=subcategory&subcategoryid=1107#T1162) Mark actually downst know that those are the exact ones but he said the springs and cam came from Thunder Racing as a package and seeing that this is the only Isky springs they carry.

[brandboZ28]

The retainers and locks come with the springs. I dont think they use shims but I could be wrong.

[Tally TransAm]

are you kidding me

that is some bullshit

[Bryan02TA]

you have the worst luck of anybody i have ever seen. I would have sold my car by now and bought an ls1, or in my case, an 04 cobra

[redmach1]

Bo, have you pulled the front back down since this fiasco began? My boss swears that you got the camshaft out of time from the crank. He thinks the pistons are hitting the valves. It might be fruitfull to pull the front back off of it to check before you order more stuff. At TDC are the cam lobes on #1 on the base circle?

[Tally TransAm]

its timed perfectly

[96s10]

you have the worst luck of anybody i have ever seen. I would have sold my car by now and bought an ls1, or in my case, an 04 cobra

i agree. time for the ls1.

[redmach1]

its timed perfectly
So, is that a yes to my question? Something isn't perfect and I am having alot of trouble believing that coil bind is causing this problem.

[Tally TransAm]

they were when we lashed the valves

[Greg Kulbick]

Every time the front has come off since the initial install, everything has remained timed perfectly. Dot to dot, cam dowel at three o'clock. When the second timing chain came, neither the cam nor the crank were turned without the chain on.

[redmach1]

they were when we lashed the valves

Did you notice coil bind when you were lashing the valves? They would have to be going into bind way before the maximum lift of the cam to bend the pushrods like that. If the cam is one tooth off, it might be causing this.......I am reaching because I know you guys set this thing up correctly. I just don't want Bo to buy a new set of springs only to have this happen again. I forgot to ask if Bo got the retainers and locks from Mark also.

[Tally TransAm]

it didnt look like it was going into coil bind at all

and even if it was, theres no reason at all it should have with stock lifters and rockers

[redmach1]

it didnt look like it was going into coil bind at all

and even if it was, theres no reason at all it should have with stock lifters and rockers

I agree, that is what is driving me crazy.......

[Greg Kulbick]

Now you know how we feel watching this thing bend pushrods all the while knowing everything is set up the way it should be.

[FloridaZ]

The retainers and locks come with the springs. I dont think they use shims but I could be wrong.

Are you using the spring locaters that Mark gave you ?

[96s10]

i know this is a really stupid question, especially since i don't know too much about the internals of an engine, but could the pushrods be too long? with the higher lift of the cam, do the pushrods need to be shorter?