Couple of question in ONE TREAD.
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From: W.P.B
Couple of question in ONE TREAD. Today, I spoke to Mark @ raging motorsports (since I bought my H/C with him, I asked him "what pushrods should I use with my new heads." His reply, I think was "use 7.3's, or i could have been 7.35's. I just want to get a couple of answers and see what you guys say. Next question, I don't really want to use stock heads gaskets, so at my job I can get the FELPRO performance (part # 1041) for 42.00 a piece. Is anybody using them? are they a quality gasket? Are they the stock thickness? please let me know, so i can order them. OR should I stick with the stockers. Thanks
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From: SW Florida
Re: Couple of question in ONE TREAD. Jeeze,,,, Those 7.30" rods are .100" (100 thousands) shorter than stock!
If your heads are milled .030", you need .030" shorter rods.
If your cam has a .030" smaller than stock centerline to lobe heal distance (I bet it's close), you need a .030" longer rod.
Combine the two, and your stock 7.40" rods would be perfect.
Make sense?
Ron,
"With stock length 7.40" pushrods in his head/cam car....
If your heads are milled .030", you need .030" shorter rods.
If your cam has a .030" smaller than stock centerline to lobe heal distance (I bet it's close), you need a .030" longer rod.
Combine the two, and your stock 7.40" rods would be perfect.
Make sense?
Ron,
"With stock length 7.40" pushrods in his head/cam car....
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From: W.P.B
Re: Couple of question in ONE TREAD. I forgot to post that my heads are cut ".30", Help me people, I have no clue with push rods to run. I dont know the size of my new cam I just know that its 227/235 .595.605 111LSA. So my current 7.4's are what I should stick with?
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From: SW Florida
Re: Couple of question in ONE TREAD. Use the stock GM graphite gaskets:
Head gasket set (graphite style) P/N 12498543 $34.15 for the set from Scoggin-Dickey >>>>>>>
Head Gasket Set includes: Gasket P/N 12558809 (Lft side) & Gasket P/N 12558810 (Rt side)
These graphite style head gaskets can be used on all year model 5.7 LS1s.
Head gasket set (graphite style) P/N 12498543 $34.15 for the set from Scoggin-Dickey >>>>>>>
Head Gasket Set includes: Gasket P/N 12558809 (Lft side) & Gasket P/N 12558810 (Rt side)
These graphite style head gaskets can be used on all year model 5.7 LS1s.
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From: SW Florida
Re: Couple of question in ONE TREAD. And you might as well get the complete head bolt set from them too:
Head bolt set, P/N 12498545, $16.95 ea, (need 02), $33.90
You won't beat these prices anywhere.
BTW, your local GM dealership won't even recognize these two P/Ns
Ron,
Head bolt set, P/N 12498545, $16.95 ea, (need 02), $33.90
You won't beat these prices anywhere.
BTW, your local GM dealership won't even recognize these two P/Ns
Ron,
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From: W.P.B
Re: Couple of question in ONE TREAD. Ok, so use the stock length, are you 100% sure? So don't buy the felpro head gaskets then? I thought the felpro gasket would up better under the uses of Nitrous.
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From: SW Florida
Re: Couple of question in ONE TREAD. Ok, so use the stock length, are you 100% sure?
Believe me.... I am 100% sure.
Tell you what.. Take your stock engine. Turn the engine so as one of the valves is fully closed (lifter is on the heal of the cam). Loosen the rocker arm. Then tighten it till its at zero preload (the rocker bolt will get very hard to turn because it is compressing the spring). As soon as it gets hard to turn, your at zero preload. Then tighten the bolt to 22 Ft Lbs. It will take between 1 3/4 to 2 turns.
Install your new heads and cam and stock length hardened pushrods.. Do the same thing, and I will bet you will still be within 1 3/4 to 2 turns of the rocker bolt..... Thats the same preload, and thats the guarantee.............
Yes, I am sure (as far as your combo is concerned)...
Have Fun,
Ron
Believe me.... I am 100% sure.
Tell you what.. Take your stock engine. Turn the engine so as one of the valves is fully closed (lifter is on the heal of the cam). Loosen the rocker arm. Then tighten it till its at zero preload (the rocker bolt will get very hard to turn because it is compressing the spring). As soon as it gets hard to turn, your at zero preload. Then tighten the bolt to 22 Ft Lbs. It will take between 1 3/4 to 2 turns.
Install your new heads and cam and stock length hardened pushrods.. Do the same thing, and I will bet you will still be within 1 3/4 to 2 turns of the rocker bolt..... Thats the same preload, and thats the guarantee.............
Yes, I am sure (as far as your combo is concerned)...
Have Fun,
Ron
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From: SW Florida
Re: Couple of question in ONE TREAD. BTW, if you just installed the .030" milled heads, I would say to use the shorter 7.35" rods, but in your case, you have a cam with a smaller base circle.
BTW, a TR220 cam has a .025" smaller centerline to lobe heal distance than the stock cam (I put a mic on both of them). Your cam is more than likely .030"
BTW, a TR220 cam has a .025" smaller centerline to lobe heal distance than the stock cam (I put a mic on both of them). Your cam is more than likely .030"
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From: SW Florida
Re: Couple of question in ONE TREAD. One more thing...
That cam of yours has very fast ramps. It's going to sound like a sewing machine no matter what length pushrods you use.
________________________________________________
Although you don't have a TR220, here are the base circle specs: Remember, yours will have slightly less cam centerline to lobe heal distance since it is a bigger cam.
Stock LS1 Base Circle: 1.552” cam base circle = 0.776” centerline to heel distance
TR-220 Base Circle: 1.502” cam base circle = 0.751” centerline to heel distance (.025” less than stock)
________________________________________________
<small>[ April 21, 2003, 10:36 PM: Message edited by: Tin Indian ]</small>
That cam of yours has very fast ramps. It's going to sound like a sewing machine no matter what length pushrods you use.
________________________________________________
Although you don't have a TR220, here are the base circle specs: Remember, yours will have slightly less cam centerline to lobe heal distance since it is a bigger cam.
Stock LS1 Base Circle: 1.552” cam base circle = 0.776” centerline to heel distance
TR-220 Base Circle: 1.502” cam base circle = 0.751” centerline to heel distance (.025” less than stock)
________________________________________________
<small>[ April 21, 2003, 10:36 PM: Message edited by: Tin Indian ]</small>
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From: W.P.B
Re: Couple of question in ONE TREAD. Hey "TIN" Thanks alot for your input, but if it makes any differance, im currently running the TR224 cam using C.C moly 7.4 pushrods. So let me right this in stone, With my new heads (milled .30) and my new 227/235 .595.605 111LSA cam, using the stock pushrods, wont cost me any performance, and will match up PERFECTLY. Once again, thank you. If at all possible, could I speak to you on the phone, If you post your number, let me call you, no need for you to dial long distance. I don't have to be at work till noon tomorrow. I have a couple of questions. Thanks