HPR 468 peaking to low.
Man I feel for you .I’m going thru the same **** with Steward Lifers. I sent them back August 23 I have called 4 times already no answer no emails.anybody can have a defective product. but it’s how They address the problem. I hate for you.
Last edited by Last 1; Sep 23, 2021 at 10:02 AM.
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From: Lawrenceburg Ky
Just curious, how much spring pressure were you running? A lot of the serious big boy solid roller set-ups I see just run solid valves and spring accordingly for the weight. Every set-up is different though, I probably would have built my combo same as yours. Hope it goes back together soon.
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The hollow stem Ferrera intakes are a 98 gram hollow stem performance valve. No backstory really, as they are an upgrade to a solid stem intake because of weight. A big valve like this is heavy and hollow stems are common with a valve this size. I’ve ran the slop out of mine without issue. I’m likely going to go Ti intakes, which is an upgrade yet again, but very expensive, as they are bigger and heads have to e re-worked. First valve like this ive seen break a stem personally.
Last edited by BigDaddy97; Sep 23, 2021 at 10:36 AM.
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Last edited by BigDaddy97; Sep 23, 2021 at 10:53 AM.
Yeah I'm glad I was steered away from hollow stem on my ls3 heads. Gavin Simcoe said let's do solid. My mast ls7 heads have titanium.
Sorry to see you getting an expensive bill on this
Sorry to see you getting an expensive bill on this
Rev valves…say no more. Ferrera on the other hand, nothing but quality. I hate this man. Edited my previous post. Meant to say first Ferrera hollow stem I’ve seen break.
Last edited by Che70velle; Sep 23, 2021 at 10:51 PM.
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Damn...been off the boards for quite a while and just came across this thread.
That sucks about the valves.
FYI, engine dyno I picked up over 20 crank HP and some torque with a billet top loaded lid and 4550 accufab on the Holley Highram with out touching anything else.... this engine is a deep breather.
My 468 is getting ready to be reinstalled in a week or so....... Erik put in a solid roller cam ( I decided to stop being a pu$$y LOL), Naiser ported the BR7's some more and now have somewhere around 300cc intake port volume and picked up considerably amount of flow all the way out to .800 . I think the original port volume (275cc) may have held us back as Naiser's big Superflow showed numbers on my original head port work that really didn't match what the original 660 bench showed...the numbers were significantly lower than the what Dan initially got out of them before they began the port work...but the final numbers Todd and Dan were able to finally get were amazing. We shall see real soon what that translates too
We installed some gas ported rings, a CCW crank, some serious endurance conical springs, etc.
Should be an interseting few weeks coming up as I prepare for the race season
That sucks about the valves.
FYI, engine dyno I picked up over 20 crank HP and some torque with a billet top loaded lid and 4550 accufab on the Holley Highram with out touching anything else.... this engine is a deep breather.
My 468 is getting ready to be reinstalled in a week or so....... Erik put in a solid roller cam ( I decided to stop being a pu$$y LOL), Naiser ported the BR7's some more and now have somewhere around 300cc intake port volume and picked up considerably amount of flow all the way out to .800 . I think the original port volume (275cc) may have held us back as Naiser's big Superflow showed numbers on my original head port work that really didn't match what the original 660 bench showed...the numbers were significantly lower than the what Dan initially got out of them before they began the port work...but the final numbers Todd and Dan were able to finally get were amazing. We shall see real soon what that translates too
We installed some gas ported rings, a CCW crank, some serious endurance conical springs, etc.
Should be an interseting few weeks coming up as I prepare for the race season
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From: Lawrenceburg Ky
Damn...been off the boards for quite a while and just came across this thread.
That sucks about the valves.
FYI, engine dyno I picked up over 20 crank HP and some torque with a billet top loaded lid and 4550 accufab on the Holley Highram with out touching anything else.... this engine is a deep breather.
My 468 is getting ready to be reinstalled in a week or so....... Erik put in a solid roller cam ( I decided to stop being a pu$$y LOL), Naiser ported the BR7's some more and now have somewhere around 300cc intake port volume and picked up considerably amount of flow all the way out to .800 . I think the original port volume (275cc) may have held us back as Naiser's big Superflow showed numbers on my original head port work that really didn't match what the original 660 bench showed...the numbers were significantly lower than the what Dan initially got out of them before they began the port work...but the final numbers Todd and Dan were able to finally get were amazing. We shall see real soon what that translates too
We installed some gas ported rings, a CCW crank, some serious endurance conical springs, etc.
Should be an interseting few weeks coming up as I prepare for the race season
That sucks about the valves.
FYI, engine dyno I picked up over 20 crank HP and some torque with a billet top loaded lid and 4550 accufab on the Holley Highram with out touching anything else.... this engine is a deep breather.
My 468 is getting ready to be reinstalled in a week or so....... Erik put in a solid roller cam ( I decided to stop being a pu$$y LOL), Naiser ported the BR7's some more and now have somewhere around 300cc intake port volume and picked up considerably amount of flow all the way out to .800 . I think the original port volume (275cc) may have held us back as Naiser's big Superflow showed numbers on my original head port work that really didn't match what the original 660 bench showed...the numbers were significantly lower than the what Dan initially got out of them before they began the port work...but the final numbers Todd and Dan were able to finally get were amazing. We shall see real soon what that translates too
We installed some gas ported rings, a CCW crank, some serious endurance conical springs, etc.
Should be an interseting few weeks coming up as I prepare for the race season
Oh man. Yes! Good updates man excited to see what it does. You were obviously up against some breathing limitations - solid roller and much bigger heads is the way to go. 275cc heads are at home on a 427.
Jealous of your big spring pockets. Those conical springs are nice, but need a larger spring base for high lift capable springs.
Any specs on that solid roller?
The gas ported rings from what I've seen are all positive with no downside.
Jealous of your big spring pockets. Those conical springs are nice, but need a larger spring base for high lift capable springs.
Any specs on that solid roller?
The gas ported rings from what I've seen are all positive with no downside.
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Oh man. Yes! Good updates man excited to see what it does. You were obviously up against some breathing limitations - solid roller and much bigger heads is the way to go. 275cc heads are at home on a 427.
Jealous of your big spring pockets. Those conical springs are nice, but need a larger spring base for high lift capable springs.
Any specs on that solid roller?
The gas ported rings from what I've seen are all positive with no downside.
Jealous of your big spring pockets. Those conical springs are nice, but need a larger spring base for high lift capable springs.
Any specs on that solid roller?
The gas ported rings from what I've seen are all positive with no downside.
Erik was pretty excited about the new spring we are using.
New solid roller is .800 lift.
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On The Tree
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From: HTown, Texas
Damn man, not to **** on Tony or anything but you're taking this pretty well for someone whose had two motors taken out by the same company's heads.
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On The Tree
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From: HTown, Texas
Gotcha. You sir are a gentleman and a scholar lol. Hoping the repair goes well and you're back to racing in no time.
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You know, after reading about the destruction and knowing about it peaking low, etc. As soon as I saw the pics with the broken valve, first thing I thought was you were floating the valves and didnt know it. Have Erik look hard at the valve job, it'll show signs of it. Maybe I'm wrong, but maybe I'm not. JMO, the .685 BTR spring is a nice piece for the $$$, but I would have expected something way more serious on your combo, Manley Nextek or Comp Concial, somehting like that.