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Re: Roller vs solid
[Re: jcc]
#2727098
12/26/19 03:58 PM
12/26/19 03:58 PM
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Joined: Jan 2003
Posts: 31,050
Oregon
AndyF
I Win
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I Win
Joined: Jan 2003
Posts: 31,050
Oregon
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While you are at it break out the money bucket and do an LS firing order. I'm still having sticker shock over that one! Benefits (other than a lighter wallet)? It will sound like a SB Ford! (I tested firing orders on my race engine and never saw any difference. My take on the subject is that firing order might matter for NASCAR, F1 and Indy cars. Not sure it matters to anyone else.) I thought a big plus was that it made the crank happier? Might be true on a super high output engine but it doesn't seem to make any difference on the typical bracket type engine.
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Re: Roller vs solid
[Re: AndyF]
#2727101
12/26/19 04:05 PM
12/26/19 04:05 PM
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Joined: Mar 2003
Posts: 9,100
Rogue River, OR
Jeremiah
master
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master
Joined: Mar 2003
Posts: 9,100
Rogue River, OR
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Andy, is your thinking that the firing order swap only makes sense for engines seeing longer duty cycles i.e. road racing, circle track, etc.? I am trying to wrap my mind around the $550 dollars extra in cost for my 511 build. So far the consensus appears to be, using PRH parlance is "a solid maybe" lol
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Re: Roller vs solid
[Re: Jeremiah]
#2727113
12/26/19 04:33 PM
12/26/19 04:33 PM
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Joined: Jan 2003
Posts: 14,506
So. Burlington, Vt.
fast68plymouth
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 14,506
So. Burlington, Vt.
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I’ve never done a back to back test.
The cores are available in the Chevy world.
Some customers want it, so I get it for them.
But it’s not like any of those motors that got the FO swap stood out as being anything extraordinary.
They worked as they were expected to...... even without considering the FO swap.
The most abused motors I’m involved with are supercharged marine stuff.
They don’t seem to experience an unusual amount of crank failures....... almost none that we see have a FO swap cam.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads
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Re: Roller vs solid
[Re: Jeremiah]
#2862215
12/19/20 05:00 PM
12/19/20 05:00 PM
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Joined: Feb 2016
Posts: 55
CT
roadrunner2
OP
member
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OP
member
Joined: Feb 2016
Posts: 55
CT
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Well the final numbers are in for my flat tappet 10:1 451” stock appearing engine. It will be retired following a run of 11.63 @ 119.09. Traction wasn’t the best and it 60’d at 1.77 and the DA was over 1200. I am more than happy with what I was able to get from a very mellow build. It nearly matched the numbers of the fastest “383” builds ever.
I’m just a few weeks I’ll be pulling the 451 and replacing it with the 499” 13.7:1 roller cammed build. My original goal was to go 11.4-11.3 at 120 but with all I learned from racing the little engine I may have to revise my expectations.
I’ll keep all posted
Bill
1968 Road Runner 383 727 3.91 8 3/4 3520 with driver 11.04 @ 124.26 with 1.67 60’
Done on G70-14 redlines thru factory manifolds New quickest ever 383 build in FAST.
10:1 451” replaced with 14:1 499”.
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Re: Roller vs solid
[Re: pittsburghracer]
#2862240
12/19/20 06:14 PM
12/19/20 06:14 PM
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Joined: Jan 2003
Posts: 11,721
Portage,michigan
B3422W5
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 11,721
Portage,michigan
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I know a guy who did that in a Stock/ Superstock combo car, and didn't see squat on his time slips, that was noticable
69 Dart GTS A4 Silver All steel, flat factory hood, 3360race weight
418 BPE factory replacement headed stroker, 565 lift solid cam
Best so far, 10.40 @127 1/4
1.41 best 60 foot
6.60 at 103.90 1/8
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Re: Roller vs solid
[Re: B3422W5]
#2862255
12/19/20 06:28 PM
12/19/20 06:28 PM
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Joined: Feb 2005
Posts: 20,185
PA.
pittsburghracer
"Little"John
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"Little"John
Joined: Feb 2005
Posts: 20,185
PA.
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I know a guy who did that in a Stock/ Superstock combo car, and didn't see squat on his time slips, that was noticable I can only tell you what he told me. I didn’t want to call him a lier.
1970 Duster
Edelbrock headed 408
5.984@112.52
422 Indy headed small block
5.982@112.56 mph
9.42@138.27
Livin and lovin life one day at a time
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Re: Roller vs solid
[Re: fast68plymouth]
#2862793
12/20/20 11:06 PM
12/20/20 11:06 PM
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Joined: May 2003
Posts: 6,566
Downtown Roebuck Ont
Twostick
Still wishing...
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Still wishing...
Joined: May 2003
Posts: 6,566
Downtown Roebuck Ont
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I’ve never done a back to back test.
The cores are available in the Chevy world.
Some customers want it, so I get it for them.
But it’s not like any of those motors that got the FO swap stood out as being anything extraordinary.
They worked as they were expected to...... even without considering the FO swap.
The most abused motors I’m involved with are supercharged marine stuff.
They don’t seem to experience an unusual amount of crank failures....... almost none that we see have a FO swap cam. My builder has a couple of GP Hydroplane engines waiting for him to finish upgrading his dyno for. It's a wonder they don't break EVERYTHING! They run WFO at 8200+ for 5 miles plus warm up laps and if the prop comes out of the water which happens regularly, they buzz past 10,000 only to instantly get yanked back to 8000 or less when the prop hooks back in the water. One team had a Pro Stock builder that thought he was all that do an engine for them. The boat made the fastest 3/4 of a lap ever recorded before it emptied the crankcase into the bilge. Marine engines have more in common with dump trucks than race cars. Lol Kevin
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