Re: which rod for a bracket motor
[Re: rebel]
#2189737
11/04/16 10:36 PM
11/04/16 10:36 PM
|
Joined: Jan 2003
Posts: 16,376
dogdays
I Live Here
|
I Live Here
Joined: Jan 2003
Posts: 16,376
|
http://www.dragracecarparts.co/oliver-billet-i-beam-connecting-rods-bb-chevy-6-535-length-c6535bb8/If cost is no object here they are. Callies Ultra would also be there, as would Crower or Carillo. But realistically you could probably run Scat or Eagle H-beams or Molnar or Compstar or K1 or 440Source, no problem. The real question is your rpm is 8000, what is your stroke and how much does the piston/pin weigh? The inertia loading at the top of the exhaust stroke is what kills rods, that and detonation. R.
|
|
|
Re: which rod for a bracket motor
[Re: rebel]
#2189758
11/04/16 11:00 PM
11/04/16 11:00 PM
|
Joined: Jan 2003
Posts: 684 St. Charles, MO.
Slingshot383
mopar
|
mopar
Joined: Jan 2003
Posts: 684
St. Charles, MO.
|
I've got a set of GRP rods mated to a set of Ross pistons that lived @ 8200 rpm, in a 408 cu.in 440-1C headed motor, injected on alcohol.
1994 Undercover Chassis 125" altered
stack injected big block, soon blown and injected
Member of The Torque and Recoil Club
|
|
|
Re: which rod for a bracket motor
[Re: rebel]
#2189923
11/05/16 10:46 AM
11/05/16 10:46 AM
|
Joined: Jan 2003
Posts: 2,915 A shed in England
Tig
master
|
master
Joined: Jan 2003
Posts: 2,915
A shed in England
|
Oliver make good rods also
'74 Challenger..9.46 @ 145.9 1/4, 6.001 @ 118 1/8 so far. 4023lb !!! # N/A, Marsh performance 655ci, Indy Maxx, T/R, Indy 600-13 X's, Street legal, pump gas, full interior, Cal-Tracs, mufflers, 3:73's and real 10.5 radials. 9.51 @ 142.4 1/4, 6.003 @ 114 1/8 with our old mule KB, 572-13, 580 wedge. RHD '68 Barracuda Fastback 323ci street/strip. Best ET 13.88 @ 99.03
|
|
|
Re: which rod for a bracket motor
[Re: rebel]
#2189928
11/05/16 10:54 AM
11/05/16 10:54 AM
|
Joined: Jan 2003
Posts: 11,705 Portage,michigan
B3422W5
I Live Here
|
I Live Here
Joined: Jan 2003
Posts: 11,705
Portage,michigan
|
Had real good luck with compstar rods.
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
|
|
|
Re: which rod for a bracket motor
[Re: rebel]
#2189995
11/05/16 01:10 PM
11/05/16 01:10 PM
|
Joined: Jan 2003
Posts: 11,705 Portage,michigan
B3422W5
I Live Here
|
I Live Here
Joined: Jan 2003
Posts: 11,705
Portage,michigan
|
Local racer around here has an 8 second w8 barracuda. He broke a molnar Rod in it
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
|
|
|
Re: which rod for a bracket motor
[Re: B3422W5]
#2190006
11/05/16 01:25 PM
11/05/16 01:25 PM
|
Joined: Feb 2005
Posts: 20,145 PA.
pittsburghracer
"Little"John
|
"Little"John
Joined: Feb 2005
Posts: 20,145
PA.
|
Local racer around here has an 8 second w8 barracuda. He broke a molnar Rod in it Lol. Some guys can break anything and lots of issues can too. High rpm, bad engine building technics, oiling issues, and MANY more. Some guys shift at 8000 rpm without ever trying 7000 rpm
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
|
|
|
Re: which rod for a bracket motor
[Re: dthemi]
#2190026
11/05/16 01:45 PM
11/05/16 01:45 PM
|
Joined: Feb 2005
Posts: 20,145 PA.
pittsburghracer
"Little"John
|
"Little"John
Joined: Feb 2005
Posts: 20,145
PA.
|
Most of the broken rods I see are from spun bearings (from tight oil clearance), or locked wrist pins, same issue, too tight. Or people that think because an engine block coming from a machine shop LOOKS clean, it is clean.
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
|
|
|
Re: which rod for a bracket motor
[Re: pittsburghracer]
#2190095
11/05/16 03:27 PM
11/05/16 03:27 PM
|
Joined: Aug 2003
Posts: 43,097 Bend,OR USA
Cab_Burge
I Win
|
I Win
Joined: Aug 2003
Posts: 43,097
Bend,OR USA
|
Most of the broken rods I see are from spun bearings (from tight oil clearance), or locked wrist pins, same issue, too tight. Or people that think because an engine block coming from a machine shop LOOKS clean, it is clean. Valid point Engine assembly is like brain surgery, it is absolutely freaking impossible to keep it to clean
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
|
|
|
Re: which rod for a bracket motor
[Re: J_BODY]
#2190151
11/05/16 05:36 PM
11/05/16 05:36 PM
|
Joined: Dec 2006
Posts: 4,647 aotearoa
rebel
OP
master
|
OP
master
Joined: Dec 2006
Posts: 4,647
aotearoa
|
questions about Molnar rods? Call Tom himself. the thing about asking the seller is sometimes they'll just tell you want you want to hear, bit like car salesmen. Hence this is why i'm asking here so i can get some real world experiances on the different brands. Unfortunately you have to weed thru the folk that know what theyre talking about & those who only have an opinion because they have that brand & they consider it to be the bomb, even if theyre not using it to the capacity i want to be. maybe i should have done a post on 900HP engines & asked what rods they used & for how long they've run them?
|
|
|
Re: which rod for a bracket motor
[Re: rebel]
#2190170
11/05/16 06:01 PM
11/05/16 06:01 PM
|
Joined: Feb 2005
Posts: 20,145 PA.
pittsburghracer
"Little"John
|
"Little"John
Joined: Feb 2005
Posts: 20,145
PA.
|
The more info you provide in your post the better replies you will get back. Garbage in, garbage out
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
|
|
|
|
|