Ebay Rods - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


Engine Performance This section is for discussion on all engine building related questions.
Sponsored by:
Sponsored by:

Reply
 
 
 
LinkBack Thread Tools Search this Thread
Old 05-13-2016, 10:30 AM   #1
Senior Member
Thread Starter
 
mmmjesse's Avatar
 
Join Date: Aug 2007
Posts: 568
Total Cats: 43
Ebay Ebay Rods

so i have seen many of y'all running the ebay rods with excellent results. It amazes me that an ebay rod can be trusted but there seems to be plenty of proof that they are fine.

So what i would like to know is which ones? When searching i have come across several different sellers and wasnt sure if there is a particular one or branded set to look for?

mmmjesse is offline   Reply With Quote
Old 05-13-2016, 10:34 AM   #2
mkturbo.com
iTrader: (24)
 
shuiend's Avatar
 
Join Date: May 2006
Location: Charleston SC
Posts: 13,775
Total Cats: 1,106
Default

You just want to make sure the eBay rods come with ARP2000 rod bolts. Some of the cheaper ones do not, and it will be more expensive to buy those later.
shuiend is offline   Reply With Quote
Old 05-13-2016, 10:47 AM   #3
Murderator
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 36,165
Total Cats: 2,573
Default

this has been discussed to death. aside from the bolts like Lars said they are all either same or very similar and likely made in the same factory

this is one of the few parts you're allowed to use from ebay
18psi is offline   Reply With Quote
Old 05-13-2016, 11:01 AM   #4
Senior Member
iTrader: (8)
 
Join Date: Jan 2012
Location: Azusa, CA
Posts: 1,376
Total Cats: 80
Default

Careful thing to consider is bolt diameter. Eagle, manley,etc use 3/8" ARP 2000 bolts. Some ebay rods are using 5/16" ARP 2000 bolts. I was advised by a reputable engine builder to find a forged rod with 3/8 bolts instead.
cyotani is offline   Reply With Quote
Old 05-13-2016, 11:03 AM   #5
Murderator
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 36,165
Total Cats: 2,573
Default

yikes that must be new, they used to all be 3/8 iirc
but yeah, I'd use the 3/8 as well
18psi is offline   Reply With Quote
Old 05-13-2016, 11:07 AM   #6
Senior Member
iTrader: (8)
 
Join Date: Jan 2012
Location: Azusa, CA
Posts: 1,376
Total Cats: 80
Default

I couldn't find a generic ebay connecting rod that used a 3/8" arp bolt. Eagle still was the cheapest.

or this and source your own bolts.
Cxracing for Mazda Miata 323 GTX Ford Escort H Beam Connecting Rods | eBay
cyotani is offline   Reply With Quote
Old 05-13-2016, 11:09 AM   #7
Murderator
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 36,165
Total Cats: 2,573
Default

voila, bolts included
Cxracing for Mazda Miata 323 1 6 1 8 B BP H Beam Rod Rods Bolts | eBay

*edit: doesn't specify arp tho. more searching needed.
18psi is offline   Reply With Quote
Old 05-13-2016, 11:11 AM   #8
Senior Member
Thread Starter
 
mmmjesse's Avatar
 
Join Date: Aug 2007
Posts: 568
Total Cats: 43
Default

Thanks for the input guys. I will keep an eye out of the bolt size, that is great info.

There should just be a sticky of acceptable ebay parts to use, lol.

1- Rods
2- T3 turbo(mk spec)
3- Honda Intake manifold
4- ..........
mmmjesse is offline   Reply With Quote
Old 05-13-2016, 11:12 AM   #9
Senior Member
iTrader: (8)
 
Join Date: Jan 2012
Location: Azusa, CA
Posts: 1,376
Total Cats: 80
Default

Quote:
Originally Posted by 18psi View Post
voila, bolts included
Cxracing for Mazda Miata 323 1 6 1 8 B BP H Beam Rod Rods Bolts | eBay

*edit: doesn't specify arp tho. more searching needed.
No ARP tho..


edit: edit to edit your ninja edit since you added that info
cyotani is offline   Reply With Quote
Old 05-13-2016, 11:12 AM   #10
Murderator
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 36,165
Total Cats: 2,573
Default

it all really depends on your definition of acceptable

the big risk is that QC is basically zero, so you gotta measure/check specs on everything or you can end up with a defective set
18psi is offline   Reply With Quote
Old 05-13-2016, 11:27 AM   #11
SADFab Destructive Testing Engineer
iTrader: (5)
 
aidandj's Avatar
 
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 17,990
Total Cats: 1,457
Default

Intercooler
aidandj is offline   Reply With Quote
Old 05-13-2016, 11:48 AM   #12
Senior Member
 
Join Date: Jun 2015
Location: TAMPA, FL
Posts: 640
Total Cats: 27
Default

Pauter uses 5/16th bolts on their mazda rods since forever. They were the fancy high end ARP bolts though. Something 2000.

Definitely more expensive than ebay rods tho.
AlwaysBroken is offline   Reply With Quote
Old 05-13-2016, 11:49 AM   #13
SADFab Destructive Testing Engineer
iTrader: (5)
 
aidandj's Avatar
 
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 17,990
Total Cats: 1,457
Default

[Utag]hi_Im_sean[/utag] were your bolts 3/8?
aidandj is offline   Reply With Quote
Old 05-13-2016, 12:04 PM   #14
Murderator
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 36,165
Total Cats: 2,573
Default

I seriously doubt anyone here would break even the 5/16 bolts, but if the diff is like 20 bux, why not
18psi is offline   Reply With Quote
Old 05-13-2016, 12:21 PM   #15
Senior Member
iTrader: (8)
 
Join Date: Jan 2012
Location: Azusa, CA
Posts: 1,376
Total Cats: 80
Default

Quote:
Originally Posted by 18psi View Post
I seriously doubt anyone here would break even the 5/16 bolts, but if the diff is like 20 bux, why not
An engine builder who builds spec miata engines for some of the top teams and has a lot of experience with miata engines said don't even consider it if your planning on boosting the engine. Maybe it will be fine for NA but bolts are already a weak link in the rod so going from 3/8 to 5/16 would make that the likely failure point. I decided to take his advise.
cyotani is offline   Reply With Quote
Old 05-13-2016, 12:31 PM   #16
Murderator
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 36,165
Total Cats: 2,573
Default

Like I said, I'd opt for the 3/8 just cause, but I still have yet to see a single street car have one of those fail. Maybe if the car lives at 7k and races all of it's lifetime, but that's not the case for most.

sidebar: the more I get to build other/newer cars, the more I'm just blown away by how cheap Miata parts are.
18psi is offline   Reply With Quote
Old 05-13-2016, 12:44 PM   #17
Junior Member
 
Join Date: Oct 2011
Location: New Hampshire
Posts: 322
Total Cats: 53
Default

These have 3/8" ARP fasteners, though they don't seem that much less than Eagle or Manley. Mazda Miata BP B6 1 6 1 8 5 230" 132 84mm H Beam Connecting Rod w ARP2000 Bolts | eBay
adamiata is offline   Reply With Quote
Old 05-13-2016, 05:31 PM   #18
Senior Member
 
Join Date: Jun 2015
Location: TAMPA, FL
Posts: 640
Total Cats: 27
Default

This is the first I've heard of 5/16th bolts being a liability unless they are made of some inappropriate material. I've been running my ARP2000 bolts past 7000 rpm and 18 psi for over ten years now.

I concede that I might be wrong where ultra high revving engines are concerned, but I don't think a BP with a stock crank is going to be capable of snapping ARP2000 5/16ths bolts.

BTW, the 5/16th inch bolts use 3/8th inch sockets. The 3/8ths use 7/16ths sockets.
AlwaysBroken is offline   Reply With Quote
Old 05-15-2016, 12:36 PM   #19
Junior Member
iTrader: (5)
 
Join Date: Oct 2014
Posts: 473
Total Cats: 23
Default

Quote:
Originally Posted by 18psi View Post
sidebar: the more I get to build other/newer cars, the more I'm just blown away by how cheap Miata parts are.
I went from racing old EF civics, to a WRX, and now a Miata. The amount of fast you can go to how much money comes out of your pocket is highly in favor of the Miata. I have less in my Miata than almost the basic cost of any decent WRX and it is much faster than a WRX or even an STI in almost every aspect (an STI might beat me in the 1/8th mile and minus the whole off road thing). If you can get past the aesthetic and stigma of owning/driving a Miata there is really no better option in the price/performance category.
90civichhb is offline   Reply With Quote
Old 05-15-2016, 03:43 PM   #20
Elite Member
 
codrus's Avatar
 
Join Date: Mar 2007
Location: Santa Clara, CA
Posts: 3,875
Total Cats: 344
Default

Quote:
Originally Posted by AlwaysBroken View Post
This is the first I've heard of 5/16th bolts being a liability unless they are made of some inappropriate material. I've been running my ARP2000 bolts past 7000 rpm and 18 psi for over ten years now.

I concede that I might be wrong where ultra high revving engines are concerned, but I don't think a BP with a stock crank is going to be capable of snapping ARP2000 5/16ths bolts.

BTW, the 5/16th inch bolts use 3/8th inch sockets. The 3/8ths use 7/16ths sockets.
My A-beam Carrillos use 5/16" bolts, so there's nothing wrong with that size in principle. All else being equal, if it's got the strength you need (and these are supposed to be good to 400+ at the wheels), the 5/16" version is going to be lighter.

--Ian
codrus is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Thermistor settings for ms3 basic trackdog reverent akcable MEGAsquirt 1 05-12-2016 10:36 PM
Forged Connecting Rods w/ ARP 2000 bolts - New cyotani Miata parts for sale/trade 3 05-12-2016 04:15 PM
Fat Cat Motorsports Coilover set for 2006-2015 MX-5 and 2004-2011 Mazda RX-8 graexodus Miata parts for sale/trade 1 05-09-2016 01:57 PM
1990 Mk1 1.6 Eunos - Help Needed With Megasquirt Ignition Setting Nightmare! Fireye81 MEGAsquirt 5 04-28-2016 04:12 PM
Wtb xxr 527 17x9.75 (set) Ls1mx5turbo WTB 0 04-28-2016 11:25 AM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 05:34 AM.