Sprint Fast road spring rates

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iandollysprint
Posts: 35
Joined: Tue Jul 25, 2006 10:57 am

Sprint Fast road spring rates

#1 Post by iandollysprint » Fri Aug 04, 2006 11:33 am

Looking to go for the AVO fully adjustable set up from Jigsaw racing. Struggling with spring rates though.<br>
<br>
Car will ultimately be a fast road item with maybe the odd track day.<br>
<br>
Wish to keep my teeth in place for a bit longer so I was going to go with 330lbs fronts 175lb rears.<br>
<br>
Will my teeth survive such a setup!!!!!<br>
<br>
Also has anyone put bigger antiroll bars on front and rear to reduce roll.<br>
<br>
Ta<br>
<br>
Ian

<p></p><i>Edited by: <A HREF=http://p206.ezboard.com/bthetriumphdolo ... ysprint</A> at: 4/8/06 11:58 am<br></i>

alun n
Posts: 2404
Joined: Sat Mar 08, 2003 8:41 pm

Re: Sprint Fast road spring rates

#2 Post by alun n » Fri Aug 04, 2006 11:46 am

Paul Patrickson was playing with double roll bar set ups a while back; don't think he's been on here for a while though...

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dollyboy
Posts: 474
Joined: Tue Sep 06, 2005 11:15 am

Re: Sprint Fast road spring rates

#3 Post by dollyboy » Fri Aug 04, 2006 12:05 pm

bit fierce on the front for road I'd say, take it you're poly-bushing too...

<p>project orange - slow progress<br>
project black - coming on, could be sold...<br>
project white - pimp my tolly, next year!</p><i></i>

iandollysprint
Posts: 35
Joined: Tue Jul 25, 2006 10:57 am

Re: Sprint Fast road spring rates

#4 Post by iandollysprint » Fri Aug 04, 2006 12:29 pm

Yes poly bushing everything plus aluminium mounts for steering rack.<br>
<br>
Ta<br>
<br>
Ian

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davepoth
Posts: 856
Joined: Tue Jan 20, 2004 9:46 pm

Re: Sprint Fast road spring rates

#5 Post by davepoth » Fri Aug 04, 2006 12:42 pm

Ian,<br>
<br>
I'd start by doing one thing at a time. Polybushing the whole car will make it feel a fair bit firmer anyway, as will the rack mounts. I'd try it with the bushes before going for anything else. I think the suggested order for changing suspension is:<br>
<br>
Bushes<br>
Anti Roll Bar<br>
Shocks<br>
Springs

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iandollysprint
Posts: 35
Joined: Tue Jul 25, 2006 10:57 am

Re: Sprint Fast road spring rates

#6 Post by iandollysprint » Fri Aug 04, 2006 12:51 pm

Good point<br>
<br>
What options are there for the antirollbars?<br>


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Jon Tilson
Posts: 1311
Joined: Sat Mar 08, 2003 8:28 pm

Anything....

#7 Post by Jon Tilson » Fri Aug 04, 2006 1:53 pm

stiffer than 200 and more than one inch lowered makes the car unsuitable for road use.<br>
<br>
Jonners<br>
<br>


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iandollysprint
Posts: 35
Joined: Tue Jul 25, 2006 10:57 am

Unsuitable for road use.

#8 Post by iandollysprint » Fri Aug 04, 2006 2:16 pm

Jonners<br>
<br>
Can you expand a bit here. Why would it become unsuitable on the road - speed bumps, snappy handling etc?<br>
<br>
I look at my standard sprint set up and it looks like a drop of around a foot is in order. An exageration maybe but it just looks daft at the moment.<br>
Thanks<br>
ian

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davepoth
Posts: 856
Joined: Tue Jan 20, 2004 9:46 pm

Re: Unsuitable for road use.

#9 Post by davepoth » Fri Aug 04, 2006 2:26 pm

Basically anything over an inch will ground the car on pretty much anything thicker than a penny. The car was designed with that much suspension in mind, and even 1" lower makes a really big difference to the handling. I think it also alters the front suspension geometry, putting the camber off and causing a bit of tramlining on bumpy roads. <br>
<br>
Running taller than standard (I think 75 profile) tyres will fill the wheelarches a bit better. But your best option is to use adjustable platfrom shocks, and screw them down which will compress the soft part of your spring first, increasing the spring rate and lowering the ride height at the same time.

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LewisK
Posts: 795
Joined: Sun Jul 20, 2003 2:37 pm

Re: Unsuitable for road use.

#10 Post by LewisK » Fri Aug 04, 2006 2:37 pm

Mine was lowered a good 3 inches, if not more.<br>
<br>
It was not safe - or driveable. Fortunately it never got out little damage was done! It was totally mental, subframe was almost touching the ground <!--EZCODE EMOTICON START : --><img src=http://www.ezboard.com/images/emoticons/ohwell.gif ALT=":"><!--EZCODE EMOTICON END--> <br>
<br>
Hit a bump at speeds at that height and it'd hit the sump, rip off the manifold downpipe or worse....<br>
<br>
It looked this low:<br>
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<!--EZCODE IMAGE START--><img src="http://www.antchip.com/135/images/P1010 ... <!--EZCODE IMAGE END--><br>
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<!--EZCODE IMAGE START--><img src="http://www.antchip.com/135/images/P1010 ... <!--EZCODE IMAGE END--><br>
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<!--EZCODE IMAGE START--><img src="http://www.antchip.com/135/images/P1010 ... <!--EZCODE IMAGE END--><br>
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Very, very <!--EZCODE EMOTICON START :smokin --><img src=http://www.ezboard.com/images/emoticons/smokin.gif ALT=":smokin"><!--EZCODE EMOTICON END--> but dangerous! <!--EZCODE EMOTICON START :lol --><img src=http://www.ezboard.com/images/emoticons/laugh.gif ALT=":lol"><!--EZCODE EMOTICON END--> <br>
<br>
<!--EZCODE IMAGE START--><img src="http://www.antchip.com/stmsale/images/4 ... <!--EZCODE IMAGE END--><br>
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And that's it back at standard (well, albeit on 185's)<br>
<!--EZCODE EMOTICON START :lol --><img src=http://www.ezboard.com/images/emoticons/laugh.gif ALT=":lol"><!--EZCODE EMOTICON END--> <br>
<br>
Still got those springs, if anyone wants 'em for a tenner <!--EZCODE EMOTICON START :p --><img src=http://www.ezboard.com/images/emoticons/tongue.gif ALT=":p"><!--EZCODE EMOTICON END--> nicely cut <!--EZCODE EMOTICON START : --><img src=http://www.ezboard.com/images/emoticons/ohwell.gif ALT=":"><!--EZCODE EMOTICON END-->

<p><!--EZCODE IMAGE START--><img src="http://www.antchip.com/sig2.jpg"/><!--EZCODE IMAGE END--><br>
<!--EZCODE FONT START--><span style="font-size:xx-small;"><!--EZCODE ITALIC START--><em>Crazy! I mean like so many positive waves, we can't lose! You're on!</em><!--EZCODE ITALIC END--></span><!--EZCODE FONT END--></p><i>Edited by: <A HREF=http://p206.ezboard.com/bthetriumphdolo ... >LewisK</A> at: 4/8/06 2:45 pm<br></i>

Jon Tilson
Posts: 1311
Joined: Sat Mar 08, 2003 8:28 pm

I have...

#11 Post by Jon Tilson » Fri Aug 04, 2006 2:43 pm

a 200 lb orange spring one inch lower car...<br>
Its fun and handles well, grounds on bad speed bumps and needs care and feels quite taught.<br>
The std cars I have are a bit softer and feel nicer but lean a bit. I wouldnt actually bother changing from std if everything esle is new/good.<br>
Triumph got a good comprompise with what they had at the time...<br>
I have several std dollies too and the Sprint wheels make the biggest difference.<br>
Jonners

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iandollysprint
Posts: 35
Joined: Tue Jul 25, 2006 10:57 am

Low

#12 Post by iandollysprint » Fri Aug 04, 2006 3:28 pm

LewisK<br>
<br>
Gee. That is low. Not 3 inch for me then. Maybe 1 inch.<br>
<br>
I swear my sprint sits much higher than your your last photo. Maybe it has incorrect springs on it now.<br>
<br>
Thanks for the input.

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2F45T4U
Posts: 1527
Joined: Fri Jan 21, 2005 7:50 pm

Re: Low

#13 Post by 2F45T4U » Fri Aug 04, 2006 4:23 pm

Is the engine in it? <!--EZCODE EMOTICON START :lol --><img src=http://www.ezboard.com/images/emoticons/laugh.gif ALT=":lol"><!--EZCODE EMOTICON END--> <br>
<br>
If its come off a jack and hasn't move the front sits alot higher due to the wheels tucking under.

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barracuda816
Posts: 62
Joined: Sat Nov 05, 2005 8:42 pm

Re that is low

#14 Post by barracuda816 » Fri Aug 04, 2006 6:39 pm

My rear suspention was lower that that about a month ago <!--EZCODE EMOTICON START :evil --><img src=http://www.ezboard.com/images/emoticons/devil.gif ALT=":evil"><!--EZCODE EMOTICON END--> <br>
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Suspention had snaped<!--EZCODE EMOTICON START :o --><img src=http://www.ezboard.com/images/emoticons/embarassed.gif ALT=":o"><!--EZCODE EMOTICON END--> <!--EZCODE EMOTICON START : --><img src=http://www.ezboard.com/images/emoticons/ohwell.gif ALT=":"><!--EZCODE EMOTICON END--> <!--EZCODE EMOTICON START :( --><img src=http://www.ezboard.com/images/emoticons/frown.gif ALT=":("><!--EZCODE EMOTICON END-->

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2F45T4U
Posts: 1527
Joined: Fri Jan 21, 2005 7:50 pm

Re: Re that is low

#15 Post by 2F45T4U » Fri Aug 04, 2006 8:38 pm

How did you do that?!<br>
<br>
do you have MSN Luke?

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