fd 8.8 conversion....

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Jun 30, 2006 | 07:26 AM

#26

dhahlen

FD Under Construction =P

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From: Avondale, AZ

Quote:

Originally Posted by Elec87

I went this route to eliminate wheel hop in my combo. The newer cobra's ditch the indepentdent for a solid 8.8 all the time. I just don't really care much about handling.
Thanks for the postive comments.

Yup, the solid is well... solid. Haha, yeah I've seen that quite often. Much stronger than the IRS.

Jul 2, 2006 | 12:42 PM

#27

jimlab

Super Snuggles

Joined: Feb 2001

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From: Redmond, WA

Quote:

Originally Posted by dhahlen

I know the mustang COBRA rear ends went IRS in 2003.

'99 was the first year for IRS. They used a 29-spline half shaft that is smaller than the '01 31-spline half shaft, which is in turn smaller than the '03-'04 31-spline half shaft.

Quote:

Originally Posted by Elec87

The newer cobra's ditch the indepentdent for a solid 8.8 all the time.

Which is not due to the strength of the differential. It's due to the design of the IRS which uses a "double bushing" setup (one set of bushings for the suspension arms, and a second set mounting the rear subframe to the body) as well as the lousy coil spring configuration.

The stock setup also mounts the rear of the differential from one side only, with a rubber mount. Without a girdle or brace for the rear of the differential, they're notorious for snapping the mounting pad off the back of the thin cast aluminum rear cover.

Quote:

Originally Posted by dhahlen

Much stronger than the IRS.

Not really. Strength is more a factor of the axles and differential and ring gear assembly, and the IRS 8.8" is just as strong as the live 8.8" setup. It's the shortcomings of the mounting system that make it less desirable for drag racing, at least on a 3,500+ lb. Mustang.

Jul 2, 2006 | 12:45 PM

#28

dhahlen

FD Under Construction =P

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From: Avondale, AZ

Yay! Facts!

hehe

Aug 13, 2006 | 01:35 PM

#29

Elec87

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From: Davenport

Time to work on this thing again... Today will be a step forward.

Nov 9, 2006 | 10:21 PM

#30

LETHAL RX7

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From: pa

?????

Nov 10, 2006 | 04:50 AM

#31

xthephilx

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From: Rockville MD

Quote:

Originally Posted by LETHAL RX7

?????

You brought this back to say...that?

Nov 11, 2006 | 09:22 PM

#32

tidbit

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From: Seattle

Quote:

Originally Posted by Elec87

Why are there so many of you guys with the holier than thou attitude? if somone does a 20b swap does that make it not a rx7 again? I do have two camaro's and bought this piece of **** wrecked and fixed it so It had a second chance. Offense is taken and this keeper stock bullshit. If I bought a mustang and put a ls1 in it would be the same thing, who cares as long as it goes fast and looks cool.

i agree... but.. say with me.. Why not turbo the 420?

i for one am doing the ls swap.. but am still undecided on what rearend i want to run.. as i will be road racing (for fun only).. guess i will have to figure that one out later..

need to find me a cheap ls drivetrain tho..

Nov 11, 2006 | 09:27 PM

#33

tidbit

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From: Seattle

bloody hell dead threads back to life.. hate when that happens

Nov 12, 2006 | 12:43 AM

#34

badmatt

sycloen

Joined: Nov 2006

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From: winnipeg

looks wicked, the 8.8's could use a little bit of braceing also weld the tubes to the main center housing because they like to talk out under loads.

oh and

IRS SUCKS

Nov 12, 2006 | 10:01 AM

#35

xthephilx

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From: Rockville MD

Quote:

IRS SUCKS

Go back to the fifties then.

Nov 22, 2006 | 08:28 AM

#36

Elec87

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From: Davenport

All has been sold, life went to **** in a handbag.....

Nov 22, 2006 | 05:48 PM

#37

diagoro

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From: Austin

thats karma i guess

Nov 28, 2006 | 03:53 PM

#38

Eat-Pez

Pretty as a $20 whore

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From: Greenville, SC

Quote:

Originally Posted by diagoro

thats karma i guess

That's what I say every time I see a blown 13b.

Nov 28, 2006 | 03:57 PM

#39

Eat-Pez

Pretty as a $20 whore

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From: Greenville, SC

Quote:

Originally Posted by WolfpackFD3S

I do agree with your statement to some extent, but I am pretty sure mustang guys would be pissed if someone stuck an LS1 in one of their cars. Of course its still and RX-7 if it has a 20B in it, it is meant to have a rotary engine after all...

. Good work on your project, its looking good.

THEIR cars? Do the Mustang guys have collective ownership on every pony car that came off the production line?? Ya, I'ld be pissed if I woke up one morning and someone swapped the motor in MY car.

Nov 28, 2006 | 04:03 PM

#40

kwman

I Hate traction

Joined: Oct 2005

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From: Wilmington NC

I'd like to have an 8.8 or 9in rear for my RX7. I hope Granny's kit will be ready soon.

Nov 28, 2006 | 04:32 PM

#41

LETHAL RX7

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From: pa

NO i brought this back to see how the car was going.. i had emailed back and forth with him a little.

Nov 28, 2006 | 06:13 PM

#42

Nihilanthic

moon ******

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From: Jacksonville, Florida

I'm just waiting on the granny's kit solid axle setups to show what kind of times they can turn at tracks.

I mean, FB's aren't exactly bad at handling and they have a BAD solid rear setup. Most people end up converting to a panhardbar setup and ditching the watts link but, OMG MAZDA DOES EVERYTHING RITE!!!

Just like the FD's stock computer, right?

Nov 28, 2006 | 10:45 PM

#43

LETHAL RX7

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From: pa

what kinda info do you guys have on the grannys deal?? its new to me.. tia
Greg

Oct 24, 2007 | 04:30 AM

#44

Jay7 Nyc

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From: NYC - SFL

Nice project, any updates?

Nov 18, 2007 | 03:57 PM

#45

LETHAL RX7

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From: pa

a couple up he said he sold it.. looked like a nice start to something thought

Nov 27, 2007 | 01:04 PM

#46

Ross381

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Joined: Jan 2007

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From: Aruba

fd 8.8 conv.

Hi,nice conversion...i'm doing allmost the same conversion that you have done,,my only problem is that i need the complete measurements of the differential..thnx