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Author Topic: fastest RX-7 running Explorer 8.8" IRS diff?  (Read 6248 times)

Offline gnx7

fastest RX-7 running Explorer 8.8" IRS diff?
« on: October 22, 2015, 12:20:09 AM »
I'm curious what the fastest car in the 1/4 is running with the Ronin Explorer 8.8" IRS diff?  FC or FD?

I know of 2 FD's that have gone low 9's with the Cobra 8.8" IRS style. 
I know that a couple FC's with stock T2 rear diffs and SBC/SBF with nitrous did low 9's too (9.30's I think)!
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'93 FD: 441ci/AllPro LS7 heads/intake en route, T56 Mag, 8.8" IRS, HolleyHP, DavisTechTC 10.32@137mph cats/full exhaust. 165mph 1/2 mile (old LS7)
'93 FD LS9 turbo, T56 Mag, Samberg 8.8" solid axle, 9.35@163mph 197mph 1/2 mile
`69 Chevelle: alum 5.3, GTS76 turbo, ChiseledPerf A/W, T56 Magnum,Ford 35 spline 9".CTS-V interior http://www.norotors.com/index.php?topic=18234.0
old yellar....440rwhp/FD sold but not forgotten: http://www.ponycars.net/scc.htm
I sell new T56 Magnums/McLeod clutch/T56 rebuild kits/Holley EFI/FIC injectors and all BrianTooleyRacing parts.  norcalmotorsport@gmail.com

Offline frijolee

Re: fastest RX-7 running Explorer 8.8" IRS diff?
« Reply #1 on: October 22, 2015, 02:41:59 PM »
I don't think we know.  There are several turbo cars in the 800-1000 whp range but we don't always ask know who's running what.  Anyone want to stake a claim to the title?

I know the explorer dual front mounts are massive compared to cobra and I much prefer our load path vs. other designs, but it's hard to say where limits really exist.  At some speed cars become pure drag machines and when that happens there's no beating a solid axle for keeping the tires pointing up and down.
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LS2 stroker FC, Mandeville big brakes, widebody, etc
Build thread:  http://www.norotors.com/index.php?topic=1274.0
www.roninspeedworks.com

LargeOrangeFont says: "Joel is right, and I love Joel. But his car sounds like the wrath of God."   ;)

Offline largeorangefont

Re: fastest RX-7 running Explorer 8.8" IRS diff?
« Reply #2 on: October 23, 2015, 01:51:05 PM »
MoparX maybe?
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Offline N2v8fcs

Re: fastest RX-7 running Explorer 8.8" IRS diff?
« Reply #3 on: October 25, 2015, 09:22:49 PM »
I'm curious too, planning to make some more  passes now that my car is Dynoed and tuned.
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:drive:
new personal best 11.45 @ 120 mph N/A car...9.11 @152 mph for the turbo car.


1987 FC  355 SBC, T-5, T2 rear        retired 5-4-11
1991 FC  383 SBC, sold to Dad. Now 5.3 w 76mm turbo, G-force T-5, 8.8 Ronin rear 
1990 FC  370 CID 6.0 w 88mm turbo, Powerglide, Ronin 8.8 w 3.15 gears

Offline andrewb70

Re: fastest RX-7 running Explorer 8.8" IRS diff?
« Reply #4 on: January 10, 2016, 01:57:36 PM »
This was done with my old Cobra cradle...

! No longer available

Andrew
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Offline nick Ritter

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Re: fastest RX-7 running Explorer 8.8" IRS diff?
« Reply #5 on: January 10, 2016, 05:31:16 PM »
^ thats bad ass!
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Offline atli126

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Re: fastest RX-7 running Explorer 8.8" IRS diff?
« Reply #6 on: February 15, 2016, 01:43:54 PM »
wow I think I need to go 8.8 eventually.
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-Bret
87 RX7 5.3/t56 TII Check it out >>>>http://www.502streetscene.net/forum/showthread.php?t=181938&page=4

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Offline coastlineamps

Re: fastest RX-7 running Explorer 8.8" IRS diff?
« Reply #7 on: February 15, 2016, 10:07:16 PM »
Holy shit....that was a pull
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Offline Bookshelf

Re: fastest RX-7 running Explorer 8.8" IRS diff?
« Reply #8 on: May 13, 2016, 02:05:37 PM »
Updates?
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Offline SH4DY

Re: fastest RX-7 running Explorer 8.8" IRS diff?
« Reply #9 on: May 19, 2016, 11:34:45 AM »
Quote from: andrewb70 on January 10, 2016, 01:57:36 PM
This was done with my old Cobra cradle...

Andrew

Sweet baby Jesus! that things shits and gets!

club_xcursion and I are both running the explorer diff w/ a 3.55 gear but not sure that either one has enough power to really push  the limits. He has trapped 132 w/ a 1.7 60' and I haven't gotten a chance to run with all this damn rain. As the season goes on I'll report back.

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Offline carlb

Re: fastest RX-7 running Explorer 8.8" IRS diff?
« Reply #10 on: July 09, 2016, 11:49:57 PM »
How fiddly is it to get this kit aligned right for welding? I'm toying with buying this and doing it myself. But...
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'93 RX-7 Black ~500hp
Forged LS2, MMS 220 Heads, 227/230 114+3, Ported FAST 92
Magnum F, Mamo RPS BC2 Clutch, Ronin 8.8 / 3.55 LSD
Ohlins DFV, RaceLogic TC, RB Dual Tip Exhaust

Offline ebdyguy

Re: fastest RX-7 running Explorer 8.8" IRS diff?
« Reply #11 on: July 10, 2016, 08:30:38 PM »
I found it quite easy.  I don't have a welder, so I did spend a little extra time double checking and marking.  eventually locked it all in place with clamps, removed the subframe and carried it off to be welded.  It came back and went in perfectly.  So, IMO, even doing it my way the kit was still pretty easy to do.  If you have a welder - piece of cake....
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Offline carlb

Re: fastest RX-7 running Explorer 8.8" IRS diff?
« Reply #12 on: July 11, 2016, 12:49:20 AM »
Quote from: ebdyguy on July 10, 2016, 08:30:38 PM
I found it quite easy.  I don't have a welder, so I did spend a little extra time double checking and marking.  eventually locked it all in place with clamps, removed the subframe and carried it off to be welded.  It came back and went in perfectly.  So, IMO, even doing it my way the kit was still pretty easy to do.  If you have a welder - piece of cake....

Cool. Thanks!!! I'll give it a go then.
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'93 RX-7 Black ~500hp
Forged LS2, MMS 220 Heads, 227/230 114+3, Ported FAST 92
Magnum F, Mamo RPS BC2 Clutch, Ronin 8.8 / 3.55 LSD
Ohlins DFV, RaceLogic TC, RB Dual Tip Exhaust
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