Stronger IRS?
Safety Car
Joined: Feb 2000
Posts: 4,564
Likes: 109
From: Austin Texas
Viper rear may be stronger but all the other parts attached for a 10 sec ride will probably take a dump.
Many hav tried over and over and eventually post they wish they went to a straight axle the first time they broke. They really dont handle much worse than an IRS unless youre a road course fiend.
Many hav tried over and over and eventually post they wish they went to a straight axle the first time they broke. They really dont handle much worse than an IRS unless youre a road course fiend.
The next weak link beyond the IRS are the outer spindles...and there are solutions for that as well.
I understand that if you put slicks on and VHT on the track and dump the clutch, D44's will die. But don't think an IRS can't reliably do low 9's in the quarter.
We have one guy in our region do it regularly in his C3...thousands of passes each year. Not apples to apples, but it is IRS vs. IRS.
Thread Starter
Advanced
Joined: Sep 2012
Posts: 50
Likes: 0
Also what do you guys do about the notorious bubbling fuel tank in the C4's? When I first got it, it could hold about 16 gallons and at my last fill up it holds around 12-13 gallon. I was thinking having a new fuel tank made without the liner inside. Thanks all for your help
Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,063
From: altered state
St. Jude Donor '05
Bladder inside gets funky.
The C5 guys running 10s got a whole bunch of money in those trannies and rearends. If they are doing it on stock ones they wont hold too long.
Even getting in the 11s they start breaking, 3rd gear likes to go too.
The C5 guys running 10s got a whole bunch of money in those trannies and rearends. If they are doing it on stock ones they wont hold too long.
Even getting in the 11s they start breaking, 3rd gear likes to go too.
Le Mans Master
Joined: May 2007
Posts: 8,448
Likes: 27
From: Valparaiso
True, going fast requires LOTS of money, its fun but it's expensive
I would like to go with a stroker LS1 and a procharger, stronger trans, and a stronger IRS, I found a C5 full IRS for 2k on fleabay. Do you think the 4l80e will be good enough for road course etc. Or should I just get a t56?
Also what do you guys do about the notorious bubbling fuel tank in the C4's? When I first got it, it could hold about 16 gallons and at my last fill up it holds around 12-13 gallon. I was thinking having a new fuel tank made without the liner inside. Thanks all for your help
Also what do you guys do about the notorious bubbling fuel tank in the C4's? When I first got it, it could hold about 16 gallons and at my last fill up it holds around 12-13 gallon. I was thinking having a new fuel tank made without the liner inside. Thanks all for your help
You have a hell of a project there ! cool to know !
Cool if you do and my hats off if you end with what you want
that's the way to go , i hope you post all the upgrades
and goods and bads of this starting venture , i would start
with an all-motor power LSX monster , but i think you'll end up
going solid .- Hope to see you soon with a new thread showcasing your updates !
Thread Starter
Advanced
Joined: Sep 2012
Posts: 50
Likes: 0
True, going fast requires LOTS of money, its fun but it's expensive
You have a hell of a project there ! cool to know !
Cool if you do and my hats off if you end with what you want
that's the way to go , i hope you post all the upgrades
and goods and bads of this starting venture , i would start
with an all-motor power LSX monster , but i think you'll end up
going solid .- Hope to see you soon with a new thread showcasing your updates !
You have a hell of a project there ! cool to know !
Cool if you do and my hats off if you end with what you want
that's the way to go , i hope you post all the upgrades
and goods and bads of this starting venture , i would start
with an all-motor power LSX monster , but i think you'll end up
going solid .- Hope to see you soon with a new thread showcasing your updates !
Le Mans Master
Joined: May 2007
Posts: 8,448
Likes: 27
From: Valparaiso
BTW , i like you , what's your name?
You have the spirit, but are you ready ?
Will be a long journey ,you will need time (if you do the wrenching)
patience for test-fail , and money (lots) , i started here around 2007.
It's 2012 and still stubborn breaking parts and trying to upgrade ! lol !
It's been 5 long years but i love each and every experience that my 87
has brought to me, plus i have met many good friends here.
Tell us more , how long you have your 87 ? What you like most , drag racing
or autocross, this looks like an interview but i like this thread and i would love
to see your 87 kicking and haulin serious azz !
ps : i have never seen a c5 rear on a c4.- Not saying it can't be done
i have never seen it. solid is the way to go with your desired power.
i've just upgraded from D36 to D44 and i want to stay there.
You have the spirit, but are you ready ?
Will be a long journey ,you will need time (if you do the wrenching)
patience for test-fail , and money (lots) , i started here around 2007.
It's 2012 and still stubborn breaking parts and trying to upgrade ! lol !
It's been 5 long years but i love each and every experience that my 87
has brought to me, plus i have met many good friends here.
Tell us more , how long you have your 87 ? What you like most , drag racing
or autocross, this looks like an interview but i like this thread and i would love
to see your 87 kicking and haulin serious azz !
ps : i have never seen a c5 rear on a c4.- Not saying it can't be done
i have never seen it. solid is the way to go with your desired power.
i've just upgraded from D36 to D44 and i want to stay there.
Le Mans Master
Joined: May 2007
Posts: 8,448
Likes: 27
From: Valparaiso
Been there !
trying to add my quote of reality here too !
hinthintForyourpowerlevelZF6Blacktag+Sol idFord9"
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Race Director
Joined: Sep 2001
Posts: 14,665
Likes: 749
From: NEwhere Ohio
IRS is the way to go.
Try telling this guy that his car w/ IRS is slow:
http://www.youtube.com/watch?v=bpP20NFmk3c
C3 guys run IRS and 9's all the time.
Aaron (AKS Racing) is a guy that runs low 9s all the time on c4 IRS. He even runs stock halfshafts. I think he either has a pinion snubber or modified the snout of the D44 to prevent twisting.
Try telling this guy that his car w/ IRS is slow:
http://www.youtube.com/watch?v=bpP20NFmk3c
C3 guys run IRS and 9's all the time.
Aaron (AKS Racing) is a guy that runs low 9s all the time on c4 IRS. He even runs stock halfshafts. I think he either has a pinion snubber or modified the snout of the D44 to prevent twisting.
Le Mans Master
Joined: May 2007
Posts: 8,448
Likes: 27
From: Valparaiso
IRS is the way to go.
Try telling this guy that his car w/ IRS is slow:
http://www.youtube.com/watch?v=bpP20NFmk3c
C3 guys run IRS and 9's all the time.
Aaron (AKS Racing) is a guy that runs low 9s all the time on c4 IRS. He even runs stock halfshafts. I think he either has a pinion snubber or modified the snout of the D44 to prevent twisting.
Try telling this guy that his car w/ IRS is slow:
http://www.youtube.com/watch?v=bpP20NFmk3c
C3 guys run IRS and 9's all the time.
Aaron (AKS Racing) is a guy that runs low 9s all the time on c4 IRS. He even runs stock halfshafts. I think he either has a pinion snubber or modified the snout of the D44 to prevent twisting.
I've seen that turbo C4 many times , i love it !
But ...what did he do to his IRS?
Or maybe he rebuilds it once a year ?
We don't know
Has AKS blew his D44 anytime ?
i would love to know too !
Racer
Joined: Feb 2003
Posts: 440
Likes: 6
From: aumsville oregon
I have a 89 Vette with 650 RWHP and last year I finally put a solid rear end in it with a threelink system with a watts bar on it. I autocross my car almost every weekend and love it. I can no drag race whenever I want without fear of breaking. I tried everything to try and keep the Dana 44 together but was breaking something at every other autocross.
Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,063
From: altered state
St. Jude Donor '05
op Im not trying to discourage you
There will always be "a few guys" out there that somehow theirs live
Most the rest will break a lot. Seen them cryoed, hardened every trick in the book, still boom. Hope you have better luck thats all.
There will always be "a few guys" out there that somehow theirs live
Most the rest will break a lot. Seen them cryoed, hardened every trick in the book, still boom. Hope you have better luck thats all.
Le Mans Master
Joined: May 2007
Posts: 8,448
Likes: 27
From: Valparaiso
Safety Car
Joined: Jan 2004
Posts: 3,556
Likes: 13
Jessie was obviously promoting his own solid rear conversion kit but I think his comments are valid
Melting Slicks
Joined: May 2001
Posts: 3,270
Likes: 26
From: Winchester VA
Cruise-In V Veteran
IIRC AKS' secret is to go softer off the line to minimize shock then it runs hard up top. It has enough power to 60' under [for example] 1.4 but he keeps it way over that to help it live.
Le Mans Master
Joined: Apr 2000
Posts: 5,713
Likes: 105
From: Manassas VA
If your dead set about keeping a IRS in the car, and willing to spend some bucks, have you considered the 9in, independent rear setup that is being made for the 2010 and up camaros? http://driveshaftshop.com/blog/?p=131
The c5 has the transmission and rear all in one unit, I would think it would take alot to adapt that to a c4. But unless you can fabricate the mounts, etc, yourself, ill bet you will be north of $10,000.00 with either of these setups.
The c5 has the transmission and rear all in one unit, I would think it would take alot to adapt that to a c4. But unless you can fabricate the mounts, etc, yourself, ill bet you will be north of $10,000.00 with either of these setups.
Last edited by 93 ragtop; Sep 29, 2012 at 01:56 PM. Reason: to add link
Drifting
Joined: Aug 2000
Posts: 1,614
Likes: 0
From: Colleyville Texas
13 years of bracket racing my 94 M6 440RWHP/440RWTQ LT1 with 4.09 gears. No problems with IRS. Have the treated Ujoints and spindles FWIW. Going with the Hoosier drag radials has helped run low 1.6's 60' with the tire pressure at 25PSI. Launch at 1500 RPM's with lite spin of tires for burnout.
Taken the approach to ignore all the trash talk and hype at the track and focus on running running 11.3-11.5 1/4 mile and 7.3-7.5 1/8 mile. Trying to knock off another .2-.3 to get in the 10's or 6's seems to push the IRS over the limit for a C4 IMHO
Taken the approach to ignore all the trash talk and hype at the track and focus on running running 11.3-11.5 1/4 mile and 7.3-7.5 1/8 mile. Trying to knock off another .2-.3 to get in the 10's or 6's seems to push the IRS over the limit for a C4 IMHO