Cam and valvetrain longevity....??? low duration high lift...
09-30-2016 | 03:03 PM
#731
Frank's Marine Service
Joined: Sep 2002
Posts: 11,959
Likes: 142
From: Elkton, MD
I saw it when I had solid rollers. Lash tightened up about 5-7 thou after the first season or so. Lift was .636 solid, tight lash roller, about 190 on the seat. Crane Grind
09-30-2016 | 03:17 PM
#732
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Joined: Feb 2009
Posts: 8,356
Likes: 1,515
From: NW Michigan
I wouldn't worry to much about the seats at this point til you pull heads and confirm which is basically what I was hearing you say in earlier post. I agree. In regards to head issues I've had them myself with Dart. At least your AFR's bolted up. I've had darts that I actually had to put on the drill press and drill a few holes 2 drill bit sizes larger and still couldn't get all the bolts in. Had to send 2 heads out of 4 back to dart finally for replacement. And yes that was after hours of porting and blending and complete assembly.
I will have to ck to see valako is doing for routine maintenance on his heads and what he's using for seats cause he's got to be slamming the living dog chit out them. Hyd roller with duration close to 741 cam and 708 lift with 1.8's and solid lifters and springs to boot. You'd think he'd be yanking his heads at least every 25 hours but seems be reliable. Maybe it's the extra spring pressure that is actually helping rather than hurting as the lifters aren't lofting off the lobes and slamming. Just a guess...
I will have to ck to see valako is doing for routine maintenance on his heads and what he's using for seats cause he's got to be slamming the living dog chit out them. Hyd roller with duration close to 741 cam and 708 lift with 1.8's and solid lifters and springs to boot. You'd think he'd be yanking his heads at least every 25 hours but seems be reliable. Maybe it's the extra spring pressure that is actually helping rather than hurting as the lifters aren't lofting off the lobes and slamming. Just a guess...
09-30-2016 | 03:21 PM
#733
Thread Starter
Gold Member
Joined: Oct 2005
Posts: 11,688
Likes: 216
From: Olmsted Falls,Ohio Marblehead,Oh
Yep never told Bob what exhaust I was running or target HP....
Says dominators here but after the fact we discovered zero clearance, I can search for them emails also if needed... But you guys keep trying to pin this as all my fault... I ask you to spend the coin then have to keep tearing engines apart after... See how it feels... Bob may have done good for you guys... But clearly not for me, and I have backed up all issues with proven paperwork and such... That's what kills me lol
[ATTACH=CONFIG]559911[/ATTACH][ATTACH=CONFIG]559912[/ATTACH]
Says dominators here but after the fact we discovered zero clearance, I can search for them emails also if needed... But you guys keep trying to pin this as all my fault... I ask you to spend the coin then have to keep tearing engines apart after... See how it feels... Bob may have done good for you guys... But clearly not for me, and I have backed up all issues with proven paperwork and such... That's what kills me lol
[ATTACH=CONFIG]559911[/ATTACH][ATTACH=CONFIG]559912[/ATTACH]
Not sticking up for him but when I've worked with him on combo's he has always asked me what parts I use, especially exhaust. We've reviewed combos for intake restricted engines and exhaust restricted systems. In a recent build, the exhaust was scrapped because the larger cam wouldn't have benefited from the small exhaust.
Maybe the limitations were reviewed, maybe not. I wasn't on the call when it was spec'd. :-)
Maybe the limitations were reviewed, maybe not. I wasn't on the call when it was spec'd. :-)
09-30-2016 | 03:24 PM
#734
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Joined: Aug 2011
Posts: 2,733
Likes: 8
From: bel air, md
I wouldn't worry to much about the seats at this point til you pull heads and confirm which is basically what I was hearing you say in earlier post. I agree. In regards to head issues I've had them myself with Dart. At least your AFR's bolted up. I've had darts that I actually had to put on the drill press and drill a few holes 2 drill bit sizes larger and still couldn't get all the bolts in. Had to send 2 heads out of 4 back to dart finally for replacement. And yes that was after hours of porting and blending and complete assembly.
I will have to ck to see valako is doing for routine maintenance on his heads and what he's using for seats cause he's got to be slamming the living dog chit out them. Hyd roller with duration close to 741 cam and 708 lift with 1.8's and solid lifters and springs to boot. You'd think he'd be yanking his heads at least every 25 hours but seems be reliable. Maybe it's the extra spring pressure that is actually helping rather than hurting as the lifters aren't lofting off the lobes and slamming. Just a guess...
I will have to ck to see valako is doing for routine maintenance on his heads and what he's using for seats cause he's got to be slamming the living dog chit out them. Hyd roller with duration close to 741 cam and 708 lift with 1.8's and solid lifters and springs to boot. You'd think he'd be yanking his heads at least every 25 hours but seems be reliable. Maybe it's the extra spring pressure that is actually helping rather than hurting as the lifters aren't lofting off the lobes and slamming. Just a guess...
09-30-2016 | 03:47 PM
#735
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Joined: Jul 2004
Posts: 11,332
Likes: 73
From: chicago
Not surprising....nice lobes he has.
09-30-2016 | 04:10 PM
#739
Thread Starter
Gold Member
Joined: Oct 2005
Posts: 11,688
Likes: 216
From: Olmsted Falls,Ohio Marblehead,Oh
Omfg Bob.... You mother!
09-30-2016 | 04:11 PM
#740
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Gold Member
Joined: Oct 2005
Posts: 11,688
Likes: 216
From: Olmsted Falls,Ohio Marblehead,Oh
Who's got the "agenda" ?? Hmm looks like MT and all of us bob haters are proving you cheerleaders wrong huh? How you Gus gonna make this part my fault!!??? Let's hear it... Boy am I lit right now!!
