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GUESS-60' difference from front suspension swap! UPDATE
#651392
03/25/10 10:06 PM
03/25/10 10:06 PM
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Joined: Aug 2003
Posts: 11,179
Atco NJ
DJVCuda
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OP
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ok - stock, worn out shocks to RMS tubular uppers, adjustable strut rods and QA1 Shocks ( single adjustable) what do you think the 60' difference would be for a mid 11 sec street car? 
Last edited by DJVCuda; 03/26/10 10:12 AM.
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Post deleted by Defbob
[Re: DJVCuda]
#651394
03/25/10 11:04 PM
03/25/10 11:04 PM
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Anonymous
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Re: GUESS - 60' difference from front suspension swap!
[Re: 72demon416]
#651399
03/26/10 03:51 AM
03/26/10 03:51 AM
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Kokomo,IN
StripeHOG
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save your money, buy some cheap 90-10's and upgrade your converter  running 12.50's I'd expect about a mid 1.6 60'. Are you having traction problems??? What do you have for rear suspension???
Andrew Brough D372
1969 Dodge Dart GTS
1.43 60'best
6.82 1/8 98mph
"the light came on and I ran out of talent"
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Re: GUESS - 60' difference from front suspension swap!
[Re: StripeHOG]
#651400
03/26/10 05:07 AM
03/26/10 05:07 AM
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Romeo MI
MR_P_BODY
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Quote:
save your money, buy some cheap 90-10's and upgrade your converter running 12.50's I'd expect about a mid 1.6 60'. Are you having traction problems??? What do you have for rear suspension???
I would disagree on the shocks... a godd set of adjustable
shocks are usually better than a so called 90/10
because they usually arent what you think they are
for the extension... I use to buy the cheap shocks
years ago and they were some what better than stock
but when I finally bought a set of adjustable the
60' dropped with no other changes....... JMO
On the OP Q .... if all else is equal you might
see .1..... just a guess
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Re: GUESS - 60' difference from front suspension swap!
[Re: MR_P_BODY]
#651401
03/26/10 08:50 AM
03/26/10 08:50 AM
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Atco NJ
DJVCuda
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Quote:
missing info how bad or whar were the 60's before the change
60' was 1.72 - 1.71 Before the swap
Quote:
save your money, buy some cheap 90-10's and upgrade your converter running 12.50's I'd expect about a mid 1.6 60'. Are you having traction problems??? What do you have for rear suspension???
this is not referring to my car - I was asking for an 11 sec car...
Anyway - The car is a 68 Coronet vert, runs pretty strong, too strong without a cage actually and had worn out shocks in it during the initial tests - the setup was completely stock and we swapped to this :
So with a 1.71 60' time what do you think the gains were going over to the QA1 / RMS setup?
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Re: GUESS - 60' difference from front suspension swap!
[Re: DJVCuda]
#651402
03/26/10 09:00 AM
03/26/10 09:00 AM
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Romeo MI
MR_P_BODY
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He might see .3 maybe more... he's going to really free up the front end for better transfer but it will also depend on the rear suspension.... JMO
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Re: GUESS - 60' difference from front suspension swap!
[Re: roadhazard]
#651406
03/26/10 10:15 AM
03/26/10 10:15 AM
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DJVCuda
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Quote:
You better spill the beans  because I'm making the same swap 
ok.... ok....
first of all we could only test the 60' as the car did not have a cage, it's ahakedown run with a little over idle launch, and getting out of it around 1000' was in the high 11's ( his first time out with the new motor) we were either going to scrap the test or just do 60' times...
after that the numbers are what they are - I was surprised and Bill from RMS was even impressed. The pictures show the alignment difference, you cant mistake that!
You can rear the entire story in the latest Mopar Enthusiast
www.moparenthusiast.com
it's free to read online and it only takes a sec to sign up if you have not already.
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Post deleted by Defbob
[Re: DJVCuda]
#651407
03/26/10 10:24 AM
03/26/10 10:24 AM
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Re: GUESS - 60' difference from front suspension swap!
[Re: DJVCuda]
#651411
03/26/10 03:08 PM
03/26/10 03:08 PM
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NC
440Jim
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Quote:
60' was 1.72 - 1.71 Before the swap
- I was asking for an 11 sec car...
That seems pretty bad before, were the tires spinning? Something was out of wack, IMO.
Target: Sixty foot = 0.12*ET + .17
For an 11 second car should go: .12*(11.0) + .17 = 1.49
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Re: GUESS - 60' difference from front suspension swap!
[Re: roadhazard]
#651412
03/26/10 03:30 PM
03/26/10 03:30 PM
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Joined: Jan 2003
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A shed in England
Tig
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Quote:
You better spill the beans because I'm making the same swap
Ditto, but I'm not at the track 'till may.
I'll also be pleased if we pick up that much too. 
'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
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Re: GUESS - 60' difference from front suspension swap!
[Re: 440Jim]
#651414
03/26/10 07:04 PM
03/26/10 07:04 PM
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DJVCuda
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Quote:
Quote:
60' was 1.72 - 1.71 Before the swap
- I was asking for an 11 sec car...
That seems pretty bad before, were the tires spinning? Something was out of wack, IMO.
Target: Sixty foot = 0.12*ET + .17
For an 11 second car should go: .12*(11.0) + .17 = 1.49
I bet it has an 11.60 in it - the one run he did make was off idle and out of it by 1000 feet for an 11.90 @ 101 - so he was off the throttle for a bit - it is no way an 11.00 car - but a street car primarily with stock front and rear suspension.
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Re: GUESS - 60' difference from front suspension swap!
[Re: davenc]
#651416
03/26/10 07:06 PM
03/26/10 07:06 PM
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Quote:
Were the same front end alignment settings used for both set of tests? Do the new upper control arms provide for less camber change on front end rise, or is the main advantage the improved caster for stability?
Dave
to keep the test apples to apples we did use the same alignment settings, with the tubular uppers you can get a few more degrees caster, but we elected not to go there.
the control arms do not provide less camber change - thats where the strut rods come into play and you can clearly see by the pictures that working - the suspension travels with more alignment in spec as opposed to the bushing style strut rods, holding the camber where it should through the entire suspension travel
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Re: GUESS - 60' difference from front suspension swap!
[Re: cheapstreetdustr]
#651417
03/26/10 07:09 PM
03/26/10 07:09 PM
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Joined: Aug 2003
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Quote:
Quote:
Were the same front end alignment settings used for both set of tests? Do the new upper control arms provide for less camber change on front end rise, or is the main advantage the improved caster for stability?
Dave
wondering the same thing on the camber..as the 2nd pic looks like camber didnt change anywhere near as much...
also wondering about the lenght of the strut rods..did it have to be aligned after installing them Dave?
i might have to try a set...
x2 on mrP's recomendation on better than 90/10 shocks..fwiw..
cheapst
Jim - yes we needed an alignment after the swap - swapping the control arms alone would have required that.
the pic is worth a thousand words regarding keeping your alignment in check during the suspension travel.... you might want to consider the other side of the coin as well - when you are breaking at high speeds the camber will also be affected - much less with the adjustable strut rods.
This test really surprised me - I didnt know the advantages till you see them first hand, and do an apples to apples test.
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Re: GUESS - 60' difference from front suspension swap!
[Re: Bad340fish]
#651421
03/27/10 08:00 PM
03/27/10 08:00 PM
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Joined: Aug 2003
Posts: 11,179
Atco NJ
DJVCuda
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Quote:
About what does a set of those QA1s cost?
about 140 a piece at summit
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Re: GUESS - 60' difference from front suspension swap!
[Re: MR_P_BODY]
#651422
03/28/10 07:12 AM
03/28/10 07:12 AM
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Joined: Nov 2009
Posts: 3,082
St. Paul , Mn.
tubtar
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Quote:
He might see .3 maybe more... he's going to really
free up the front end for better transfer but it will
also depend on the rear suspension.... JMO
We have a winner. 
Good call , Sir.
It looks to be squatting and chewing asphalt nicely in the after pic.
HUGE difference.
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