ms4 what pushrods
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ms4 what pushrods
I have a chance to pick up a used ms4 with TSP 7.350 pushrods. I still have stock heads with ls6 intake. will those pushrods work? will I need to cut my pistons? thanks
#2
You won't need to cut your pistons but those push rods are too short.
push rods are about $110
http://www.texas-speed.com/shop/item...d=152&catid=51
push rods are about $110
http://www.texas-speed.com/shop/item...d=152&catid=51
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Texas Speed is pretty good about designing/phasing their camshafts to work on stock LS1/6 longblocks, with stock pistons and rockers.
I would think you may need a little longer pushrod, maybe 7.400" or 7.425". John J. at TSP might know right off the top of his head, if you call and ask him. Most (but not always) stock combinations are becoming fairly predictable when it comes to pushrod length when using these more common or well known cam grinds.
If you don't have an adjustable pushrod for checking/confirming length, I believe the "rule of thumb" is to have between ONE to ONE AND A HALF turns after ZERO LASH (the point at which all pushrod 'wiggle' has been taken away at the lifter plunger AND rocker arm) when 'bottoming out' the rocker arm bolt on the BASE CIRCLE of your cam. Less than that, and you need a longer pushrod. More than that, and you need a shorter pushrod.
I have some 7.450" Comp Cams, if you need them.
I would think you may need a little longer pushrod, maybe 7.400" or 7.425". John J. at TSP might know right off the top of his head, if you call and ask him. Most (but not always) stock combinations are becoming fairly predictable when it comes to pushrod length when using these more common or well known cam grinds.
If you don't have an adjustable pushrod for checking/confirming length, I believe the "rule of thumb" is to have between ONE to ONE AND A HALF turns after ZERO LASH (the point at which all pushrod 'wiggle' has been taken away at the lifter plunger AND rocker arm) when 'bottoming out' the rocker arm bolt on the BASE CIRCLE of your cam. Less than that, and you need a longer pushrod. More than that, and you need a shorter pushrod.
I have some 7.450" Comp Cams, if you need them.
#6
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Texas Speed is pretty good about designing/phasing their camshafts to work on stock LS1/6 longblocks, with stock pistons and rockers.
I would think you may need a little longer pushrod, maybe 7.400" or 7.425". John J. at TSP might know right off the top of his head, if you call and ask him. Most (but not always) stock combinations are becoming fairly predictable when it comes to pushrod length when using these more common or well known cam grinds.
If you don't have an adjustable pushrod for checking/confirming length, I believe the "rule of thumb" is to have between ONE to ONE AND A HALF turns after ZERO LASH (the point at which all pushrod 'wiggle' has been taken away at the lifter plunger AND rocker arm) when 'bottoming out' the rocker arm bolt on the BASE CIRCLE of your cam. Less than that, and you need a longer pushrod. More than that, and you need a shorter pushrod.
I have some 7.450" Comp Cams, if you need them.
I would think you may need a little longer pushrod, maybe 7.400" or 7.425". John J. at TSP might know right off the top of his head, if you call and ask him. Most (but not always) stock combinations are becoming fairly predictable when it comes to pushrod length when using these more common or well known cam grinds.
If you don't have an adjustable pushrod for checking/confirming length, I believe the "rule of thumb" is to have between ONE to ONE AND A HALF turns after ZERO LASH (the point at which all pushrod 'wiggle' has been taken away at the lifter plunger AND rocker arm) when 'bottoming out' the rocker arm bolt on the BASE CIRCLE of your cam. Less than that, and you need a longer pushrod. More than that, and you need a shorter pushrod.
I have some 7.450" Comp Cams, if you need them.
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Yeah, I ran TSP's 233/239 (a couple steps down from the MS4) with 7.450" pushrods (that's what TSP recommended, and that jived with my adjustable pushrod and # of turns past zero). But this was on a 2001 LS6, so I wasn't sure if the valves or cam base were different from LS1 stuff.
I later ported and decked my heads, so I went to a shorter pushrod. My 7.450" Comps only have a couple thousand miles on them.
I later ported and decked my heads, so I went to a shorter pushrod. My 7.450" Comps only have a couple thousand miles on them.
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I want to say they were about $120-$130 new...
so I would sell for...
$80 Paypal and Shipped UPS.
Upon inspection, if you don't like them, you can return them.
But you should make sure that is the length you need, first.
so I would sell for...
$80 Paypal and Shipped UPS.
Upon inspection, if you don't like them, you can return them.
But you should make sure that is the length you need, first.
#12
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We stock & offer both the 7.400" & little bit longer 7.425" length pushrods. I would not try the 7.450" length, the 7.425" length is just about the max.
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Jason
Co-Owner, Texas Speed & Performance, Ltd.
2005 Twin Turbo C6
404cid Stroker, 67mm Twins
994rwhp/902lb ft @ 22 psi (mustang dyno) www.Texas-Speed.com
Jason
Co-Owner, Texas Speed & Performance, Ltd.
2005 Twin Turbo C6
404cid Stroker, 67mm Twins
994rwhp/902lb ft @ 22 psi (mustang dyno) www.Texas-Speed.com
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#18
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7.400" should do the trick!
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Largest Stocking Distributor of LS-x Engines / CHECK OUT OUR NEW WEBSITE!
COMP - FAST - PACESETTER - DIAMOND RACING - EAGLE SPECIALTY PRODUCTS - CALLIES - COMETIC GASKETS
RAM CLUTCHES - MOSER ENGINEERING - KOOK'S HEADERS - ARP - GM BOLTS AND GASKETS - MSD - NGK
POWERBOND - ASP - AND MORE!
Largest Stocking Distributor of LS-x Engines / CHECK OUT OUR NEW WEBSITE!
COMP - FAST - PACESETTER - DIAMOND RACING - EAGLE SPECIALTY PRODUCTS - CALLIES - COMETIC GASKETS
RAM CLUTCHES - MOSER ENGINEERING - KOOK'S HEADERS - ARP - GM BOLTS AND GASKETS - MSD - NGK
POWERBOND - ASP - AND MORE!