427 build
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From: Shawnee (Shawmpton), OKlahoma
427 build I am building a 427 this winter for my Z.
I am using the LSX bowtie block, and a set of ported LS7 heads. So far the goodies consist of a callies magnum XL crank shaft, BME rods, and a mahle bump piston. Now I am concentrating on the valve train. I have been looking at several different rocker arms and I am not really sure wich one to go with. I have been looking at the jesels due to the fact they are bad *** but come with a bad *** price. This is not a budget build by any means but not wanting to completely break the bank either. This motor will prolly see upwards of 8000 rpm's and I need a valve train that will hanlde it. What do you guys suggest? What is the best bang for the buck rocker out there thats not gonna come flying apart at a million Rpm's? I appreciate the help guys!
I am using the LSX bowtie block, and a set of ported LS7 heads. So far the goodies consist of a callies magnum XL crank shaft, BME rods, and a mahle bump piston. Now I am concentrating on the valve train. I have been looking at several different rocker arms and I am not really sure wich one to go with. I have been looking at the jesels due to the fact they are bad *** but come with a bad *** price. This is not a budget build by any means but not wanting to completely break the bank either. This motor will prolly see upwards of 8000 rpm's and I need a valve train that will hanlde it. What do you guys suggest? What is the best bang for the buck rocker out there thats not gonna come flying apart at a million Rpm's? I appreciate the help guys! If you plan on seeing that many rpms, go with the jesels and a solid lifter cam. I am not saying it can't be done with a hydraulic roller, but your margin for error is much, much smaller..
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From: Shawnee (Shawmpton), OKlahoma
Oh it going to have a solid cam in it for sure. We are going to have camotion grind a cam for it after we get the heads flow benched. Are there any shops in the sponsor list that have a wet flow bench? Another question I have is for the induction end of it. What heads and intakes would be preferred in this type of build? I know I am not wanting AFR. I am hearing some people say that the LS7 heads are not that good of an idea for high Rpm's. I looked at the ALL PRO LSW heads and was very impressed with thier product. Just wondering what everone elses experiance has been with different head and intake combos on the larger CI LSX.
the biggest problem the factory ls7 heads have is a limited spring pocket. You are very limited as to what spring you can run because of that. There are several people that have run a solid roller on them, but it is an issue to be aware of.
You planning on spraying??
You planning on spraying??
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From: Shawnee (Shawmpton), OKlahoma
the biggest problem the factory ls7 heads have is a limited spring pocket. You are very limited as to what spring you can run because of that. There are several people that have run a solid roller on them, but it is an issue to be aware of.
You planning on spraying??
You planning on spraying??
ET, ALL PRO, or the TFS 245 would be good choices, I'm partial to the ALL PRO, I carry them all but I went with the ALL PRO for my 457. BUT its not easy on the wallet at all!!
Your looking at about $5500 after rockers if you go with the titanium intakes and inconel exhaust
Your looking at about $5500 after rockers if you go with the titanium intakes and inconel exhaust
ET, ALL PRO, or the TFS 245 would be good choices, I'm partial to the ALL PRO, I carry them all but I went with the ALL PRO for my 457. BUT its not easy on the wallet at all!!
Your looking at about $5500 after rockers if you go with the titanium intakes and inconel exhaust
Your looking at about $5500 after rockers if you go with the titanium intakes and inconel exhaust
The reason I asked about the spray is that if you are not spraying heavily or boosting the snot out of it, I would go with a AL block. Price is comparable and huge weight savings. The initial purchase price block vs block is higher, but you can recoup quite a bit of the money with lower machining cost.
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For a block, I'd go LSX no doubt. With a 4.125" bore, you'd have plenty of material for rebuilds, or larger displacement in the future. The priority main oiling is a very nice feature, as well as the 6th head bolt. Plus you'll never hear of an LSX blocks dropping sleeves...
For a rocker, Jesels are awesome! Crower also make some VERY NICE rockers in steel or aluminum at a very competitive price.
For heads, I'd recommend ETP. I really don't think ALL PRO's are worth the money, but Trickflows are decent. All three put a lot of extra material around the valvespring pocket and rocker bosses for extra strength. There are also some GMPP heads coming out that are supposed to kick everyone else's ***. Sheetmetal manifolds and dominator style throttle bodies seem to be the trend as well.
For a rocker, Jesels are awesome! Crower also make some VERY NICE rockers in steel or aluminum at a very competitive price.
For heads, I'd recommend ETP. I really don't think ALL PRO's are worth the money, but Trickflows are decent. All three put a lot of extra material around the valvespring pocket and rocker bosses for extra strength. There are also some GMPP heads coming out that are supposed to kick everyone else's ***. Sheetmetal manifolds and dominator style throttle bodies seem to be the trend as well.
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The reason I asked about the spray is that if you are not spraying heavily or boosting the snot out of it, I would go with a AL block. Price is comparable and huge weight savings. The initial purchase price block vs block is higher, but you can recoup quite a bit of the money with lower machining cost.
The reason I asked about the spray is that if you are not spraying heavily or boosting the snot out of it, I would go with a AL block. Price is comparable and huge weight savings. The initial purchase price block vs block is higher, but you can recoup quite a bit of the money with lower machining cost.
I've not heard any complaints on the All Pro's? Why do you say they are a waste of money?
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From: Shawnee (Shawmpton), OKlahoma
I think he is just saying that the bang for the buck is not there. What companies can a person look at for the sheetmetal intakes and dominator style throtle bodies?
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From: Shawnee (Shawmpton), OKlahoma
What kind of price would one expect to pay for one that will handle the 8000+ rpm's? Also when going with one of these what other components will be required? Fuel rails, injectors, throttle bodies?
Like someone said, Beck is the guy putting manifolds on most of the top All Motor LSX cars. HRE is another option, but thats if you have the time and money. Expect at least three weeks to get a manifold, and thats after the longblock can be mocked up. The TB should be easy to find, most likely Accufab has them.
