pushrod length help

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Dec 28, 2009 | 01:02 AM

31camaro

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pushrod length help

is anybody running .030 milled gm lt1 castings with gmpp impy ss headgaskets or the same thickness headgaskets? if you are can i please have your pushrod length?

Dec 28, 2009 | 08:35 AM

James Montigny

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Measure twice, order once.
Odds are you'll end up with 7.150" with stock lifters.

http://www.carcraft.com/techarticles...th/index1.html
http://www.circletrack.com/techartic...gth/index.html

Dec 28, 2009 | 11:05 AM

RamAir95TA

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What James said. Measure yourself. It's just not worth the risk.

You only asked for head gasket thickeness and how much the heads have been milled. What about deck height, cam choice, cylinder head choice (aftermarket?) and lifter choice?

That's why you need to measure yourself.

Dec 28, 2009 | 11:25 AM

31camaro

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Quote:

Originally Posted by RamAir95TA

true, the deck height on the block is stock, LE spec'ed bullet racing cam, stock gm castings, stock LT1 lifters

Dec 28, 2009 | 11:31 AM

RamAir95TA

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If your heads weren't milled then you could say stock length would suffice, but you're likely to need a shorter PR.

Dec 28, 2009 | 11:42 AM

31camaro

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Quote:

Originally Posted by RamAir95TA

If your heads weren't milled then you could say stock length would suffice, but you're likely to need a shorter PR.

thanks for looking, would would i be giving up if i got the 7.150 length pushrods now without messuring?

Dec 28, 2009 | 11:50 AM

RamAir95TA

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If the pushrod is too short, you won't get full travel of the valve, increased valve guide wear, increased overall friction, reduced power, and accelerated failure of the valve/guide/rocker/spring/etc.

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Dec 28, 2009 | 02:55 PM

mdacton

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if there are not right it will destroy your guides and wear oput alot of parts fast......also will not perform like it should.

Dec 28, 2009 | 04:42 PM

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31camaro

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Quote:

Originally Posted by mdacton

if there are not right it will destroy your guides and wear oput alot of parts fast......also will not perform like it should.

thanks for the help, i talked to my machine guy and he said he would do it on friday or whatev sometime towards the end of the week

Dec 28, 2009 | 09:17 PM

#11

1 Craz28

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If I were you I would use stock pushrods. That way they will bend before any damage is done to your poor car from you working on it

Dec 28, 2009 | 09:48 PM

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bigdan1

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From: st-jean baptiste, quebec ,canada

buy a comp cam adjustable pushrod ,7702-1 visually check the rocker travel on your valve stem .....

I have 7.00 in mine ...stock heads, roller rockers

Dec 28, 2009 | 09:51 PM

#13

31camaro

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Quote:

Originally Posted by 1 Craz28

If I were you I would use stock pushrods. That way they will bend before any damage is done to your poor car from you working on it

good one jackass, i can believe you had the nuts left from being bashed on other sites to wanna even use a computer again, this link goes to this guys thread thinking he is gonna have a 400whp xfi292 cam shifting @5700... http://www.ls1lt1.com/forum/showthread.php?t=31747, get a life and have start reading up on your molten sodium fuel, i hear there thinking about marketing it

Dec 28, 2009 | 09:53 PM

#14

31camaro

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Quote:

Originally Posted by bigdan1

buy a comp cam adjustable pushrod ,7702-1 visually check the rocker travel on your valve stem .....

I have 7.00 in mine ...stock heads, roller rockers

thanks for the tip man

Dec 28, 2009 | 09:59 PM

#15

1 Craz28

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I don't think I'm at 400hp probably a solid 330. I would like to mill the heads but I'm scared of P to V contact. I don't know. I do know it has got some ***** now!

Why the hell are you keeping your stock lifters? Dude go NSA! I hope you are'nt using your stock springs

Last edited by 1 Craz28; Dec 28, 2009 at 10:12 PM.

Dec 28, 2009 | 10:17 PM

#16

31camaro

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the stock lifters were fine, ive got enough spring to compliment 2 of your cams, im running crane duals, 10 degree locks and retainers, manely ss 2.02/1.60 valves on some nicely p&p'ed heads, and a nice bumpstick from LE

Dec 28, 2009 | 10:37 PM

#17

1 Craz28

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Nice, you might be back up to stock horsepower now?

If I changed to bigger valves I would have gone with LT4 sodium filled or titainium, solid ss is too heavy!