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After 5k miles I planned to switch to a nitrous combo. But after the tear down it was discovered she needed a full rebuild. Kinda crazy because I was still winning races and running solid times. To save $ and aggravation I'm staying all motor again. Bigger intake, bigger headers and lil less weight should knock off some ET.
*I should add the valve guides that come with Brodix heads were worn the fck out and are garbage.
So like the rest of the universe I'm waiting on pistons, CHE valve guides, a few other things, and my engine builder is moving to the Carolinas. I'm probably looking at a late summer/early Fall timeframe.
Glad I bought a dirtbike to get me though the downtime 😆
did you do any wiggle test on the guides or how did you determine they were bad
They were measured with a ball type dial bore gauge, but didn’t have to bc they flopped around in there like a hot dog down a hallway.
ok thanks for the info. im getting a set of br7 soon so i guess they will need to be checked once a year, which honestly isnt horrible practice anyway. think i got bronze guides not installed by them so could be better or worse lol
ok thanks for the info. im getting a set of br7 soon so i guess they will need to be checked once a year, which honestly isnt horrible practice anyway. think i got bronze guides not installed by them so could be better or worse lol
That's not been my experience with "straight from the aftermarket" heads in the past 25 years. Pick a manufacturer.
My personal rules:
1) Buy them bare, throw the guides (if any) in the trash
2) Take them to a competent, trusted machinst
I learned the hard way not to put "performance aftermarket", assembled cylinder heads on anything I cared about.
****I'm updating this response because I was led to believe intake was 33lbs. New non-lightened version intake showed up and was 26.5lbs...only 2lbs heavier. If that's the case the lightened version by FED not worth it IMO
well that sucks cause my bare heads came with brodix guides. not sure if they were installed by porter or not and im also running crowers. was hoping u said stockers. 5/16 valves?
Last edited by Floorman279; Oct 23, 2022 at 09:17 PM.
Reason: dfvwerbrweb
well that sucks cause my bare heads came with brodix guides. not sure if they were installed by porter or not and im also running crowers. was hoping u said stockers. 5/16 valves?
Just because your car seems to be running fine doesn't mean all is ok. While waiting on the heads and intake from FED, my engine builder is inspecting everything and found some issues in the rockers. Not sure if it could have been prevented with more frequent oil changes or this is what happens with 5k+ miles on a solid roller. At least she'll be all fixed up! Will need 3 shafts and 6 bearings.
Looks like you found the weak link there.
What oil were you running, and what drain interval ?
Are you going to replace with bronze bushings, or take your chances with more ROLLERS ?
From the pics, it looks like the shaft surface hardening failed, as the needle bearings are still in place. I’d consult Crower and find out if excessive spring pressure contributed to this, or was it just a random failure. 5k street miles with a solid roller is nothing these days. Thanks for posting.
From the pics, it looks like the shaft surface hardening failed, as the needle bearings are still in place. I’d consult Crower and find out if excessive spring pressure contributed to this, or was it just a random failure. 5k street miles with a solid roller is nothing these days. Thanks for posting.
Agreed. 5k miles in my day was nothing, either: back the springs off on Sunday, adjust valves before going back out on Friday. Replace the springs every 2500 miles or so, depending on street driving. The cam grinds and spring tech is waaaay better than 15-20 years ago.
Just because your car seems to be running fine doesn't mean all is ok. While waiting on the heads and intake from FED, my engine builder is inspecting everything and found some issues in the rockers. Not sure if it could have been prevented with more frequent oil changes or this is what happens with 5k+ miles on a solid roller. At least she'll be all fixed up! Will need 3 shafts and 6 bearings.
Holy ****! Have never seen that on a Crower set-up. Bamman is a 5 builder, I would have him at least take a glance at the rocker alignment on the head. That's some crazy wear, solid roller or not. Oil didn't cause that, it's geometry or specific failure like what Chev70elle is saying.
Id wanna know what Crowers thoughts are for starters!
Some prices I'm willing to pay in this game of racing and don't expect much in return. I had it built to beat on it. The builder will get more info but it's not a main concern. My primary focus is to get the engine done and back home.
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