Which pushrods should I get?
Thread Starter
Drifting
Joined: Apr 2002
Posts: 1,716
Likes: 4
From: New Baden Illinois
Which pushrods should I get?
I know absolutely nothing when it comes to comparing pushrods. Please help me choose which ones. They are Vortec heads and I will probably just have the 1.5 ratio rockers so that I don't have to machine the heads.
I need to know what brand and what to look for as well as what length they are supposed to be.
For example, what is the difference between these pushrods:
http://store.summitracing.com/partde...0&autoview=sku
and these pushrods:
http://store.summitracing.com/partde...5&autoview=sku
I need to know what brand and what to look for as well as what length they are supposed to be.
For example, what is the difference between these pushrods:
http://store.summitracing.com/partde...0&autoview=sku
and these pushrods:
http://store.summitracing.com/partde...5&autoview=sku
NCM Grand Opening Veteran
Joined: Sep 2005
Posts: 20,979
Likes: 384
From: South of giving a damn
St. Jude Donor '11, '17
The comps are .029 longer than the cranes.
The comps are can be used with guide plates, not the cranes.
The comps are steel, the cranes chromemoly.
2 different animals. I agree with breathial, call Summit's tech support & ask which pushrods to use. If you are doing a stock engine, then I'm sure that Summit's brand will work fine.
The comps are can be used with guide plates, not the cranes.
The comps are steel, the cranes chromemoly.
2 different animals. I agree with breathial, call Summit's tech support & ask which pushrods to use. If you are doing a stock engine, then I'm sure that Summit's brand will work fine.
Le Mans Master
Joined: Sep 2001
Posts: 7,739
Likes: 630
From: Unreconstructed, South Carolina
http://store.summitracing.com/partde...view=1&N=700+0
That's a kit of 16 Sealed Power (aka Speed Pro) pushrods ( P/N RP5000RK ) for Gen 1 sbc ... 5/16" ... 7.794" stock length ... hardened 1010 steel can be used w/ guideplates (you probably don't have gp w/ vortec) ... they're an upgrade from stock & they'll work just fine for stock to mild street-strip ... I've used em ... very little info on em at summit but summit gets $22/16pc set ... you should be able to get em locally too.
I suspect summit shows little info on these because they're a better value to YOU than the other "name brands".
*edit* the 7.794" length is right for a gen 1 sbc with FLAT lifters (hyd or sld) ... but they're too long IF you have any roller cam.
That's a kit of 16 Sealed Power (aka Speed Pro) pushrods ( P/N RP5000RK ) for Gen 1 sbc ... 5/16" ... 7.794" stock length ... hardened 1010 steel can be used w/ guideplates (you probably don't have gp w/ vortec) ... they're an upgrade from stock & they'll work just fine for stock to mild street-strip ... I've used em ... very little info on em at summit but summit gets $22/16pc set ... you should be able to get em locally too.
I suspect summit shows little info on these because they're a better value to YOU than the other "name brands".
*edit* the 7.794" length is right for a gen 1 sbc with FLAT lifters (hyd or sld) ... but they're too long IF you have any roller cam.
Last edited by jackson; Nov 7, 2006 at 02:43 AM.
Safety Car
Joined: Dec 2005
Posts: 4,270
Likes: 20
From: Central Michigan
May not hurt to check the length before you buy anything, and the tech at Summit will likely recommoned this. Summit has the tool for this, I believe it's about ten bucks if I remember right.
Thread Starter
Drifting
Joined: Apr 2002
Posts: 1,716
Likes: 4
From: New Baden Illinois
Thanks guys. I just didn't want to opt for the cheaper ones and then have problems down the road because they are inferior. On the other hand, if I need the more expensive ones, that's what I will get.
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Le Mans Master
Joined: Oct 2001
Posts: 5,943
Likes: 3
From: Wildwood IL
If your not sure which length to use...heres a good article on "How To"
http://www.carcraft.com/techarticles...pushrod_length
Eddie
http://www.carcraft.com/techarticles...pushrod_length
Eddie
Le Mans Master
Joined: Mar 2004
Posts: 7,465
Likes: 1,486
From: Little Rock AR
The only ones that you can avoid right from the start are the ones that have the ball end pressed into them. Those are what you get if you ask for cheap stock pushrods from the parts store.
After that you need to get "hardened" pushrods only if you have guideplates.
The length issue is separate and needs to be checked.
-Mark.
After that you need to get "hardened" pushrods only if you have guideplates.
The length issue is separate and needs to be checked.
-Mark.
Thread Starter
Drifting
Joined: Apr 2002
Posts: 1,716
Likes: 4
From: New Baden Illinois
Originally Posted by bobs77vet
check the length so to make sure you get it right
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Safety Car
Joined: Dec 2004
Posts: 4,071
Likes: 0
From: San Diego CA
So what cam and valve springs do you plan on using? If it's not a huge solid lifter cam and with incredibly stiff springs, the cheapo push rods will probably never give you a problem. It's rather hard to bend push rods with a hydraulic cam, unless you get coil bind like the retards that put my cylinder heads on originally.
Le Mans Master
Joined: Sep 2001
Posts: 7,739
Likes: 630
From: Unreconstructed, South Carolina
Originally Posted by dgruenke
Looks like I need to get one of these tools and an adjustable pushrod.
Thread Starter
Drifting
Joined: Apr 2002
Posts: 1,716
Likes: 4
From: New Baden Illinois
Originally Posted by bobs77vet
buy the checker first.....you may not need the adjustable pushrod length checker
Race Director
Joined: Sep 2004
Posts: 11,874
Likes: 263
From: Arlington Va Current ride 04 vert, previous vettes: 69 vert, 77 resto mod
Originally Posted by dgruenke
I don't have any pushrods right now. Don't I have to use some sort of pushrod with the checker?
yes you use a stock push rod and you measure the gap between the checker and the valve and/or the pushrod......where the gap is determines what lenght pushrod you need....can you borrow a stock pushrod to check things out?
Le Mans Master
Joined: Feb 1999
Posts: 8,351
Likes: 75
From: Tampa Bay FL
I've not had luck with the pushrods with press-fit 'ball' ends. Found that one-piece, hardened Speed Pro pushrods worked best for my application; OEM-style rocker arms. When I had the ball-end style, I found that it took a bit more 'lash' than with the one-piece units.
