I'm looking for a slightly lowered look 1/2 to 1 inch for my 2003 coupe. I want to retain, as close as possible, the orig. spring rates. I was wondering if the 350z springs are close enough & will give me the drop I'm looking for. Or do I need to go for Eibach's, Tein's or other brand
I've posted detailed info regarding several different aftermarket springs on coupes in several previous threads - characteristics, specs and impact on transfer of roll stiffness, etc. The info is there if you look. Try searching for "spring rates".
2004 | 6MTs | Diamond Graphite/Graphite
Upstate NY
As far as what I have read here, the Tein's are the most economical, the 350Z springs provide the most aggressive drop, and the Eibach's may drop lower than Eibach specification. Bang for your buck, may be the Tein's. As dholly mentioned there are at least two solid threads on this issue.
I'm looking for a slightly lowered look 1/2 to 1 inch for my 2003 coupe. I want to retain, as close as possible, the orig. spring rates. I was wondering if the 350z springs are close enough & will give me the drop I'm looking for. Or do I need to go for Eibach's, Tein's or other brand
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Do NOT make the mistake of purchasing springs based on cost. Determine your goals, then research the spring characteristics and rates, make your conclusion and pay what you must to accomplish your goal.
2004 | 6MTs | Diamond Graphite/Graphite
Upstate NY
hey everyboby, thanks for the input. i've checked out those threads & have a pretty good understanding of available aftermarket springs, stiffness, drop, etc. but.... what about the 350z springs. I didn't see them mentioned in any of the threads. Has anyone installed them? if so how low did they go & were they too stiff?
thanks again
<blockquote id="quote"><font size="1" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote">TEINs are nice. Either the RSR or RSR Ti should do well also.
<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">Geez, wtf kind of 'advice' is that? There are no less than FOUR *very* different Tein downspring options and FOUR *very* different RS*R downspring options available. Some are not even in the neighborhood of oem spring rates like the guy's looking for.
Here are the oem spring's specs...
Oem rates G35 Coupe/350Z: 314front/342rear
Oem rates G35 Sedan w/sport: 314front/342rear
Oem rates G35 Sedan non-sport: 280front/315rear
(NOTE: These oem rates are believed to be the latest and most accurate, and may be slightly different than those posted in earlier threads).
Here are the aftermarket spring's specs...
Tein S-tech for G35 Coupe (SKP30-AUB00)
F/R Progressive - spring rates listed rates are final rates
358front/274rear
(vs stock G35 Coupe) F+14% R-18%
Transfers: +32% spring rate balance to front
F drop –1.2”
R drop –0.9”
Tein H-tech for G35 Coupe (SKP30-BUB00)
F/R Progressive - spring rates listed rates are final rates
324front/260rear
(vs stock G35 Coupe) F+5% R-22%
Transfers: +27% spring rate balance to front
F drop –0.6”
R drop –0.3”
Tein S-tech for 350Z (SKP26-AUB00)
F/R Progressive - spring rates listed rates are final rates
386front/402rear
(vs stock G35 Coupe) F+23% R+16%
Transfers +7% spring rate balance to front
F drop –0.7”
R drop –0.6”
Tein H-tech for 350Z (SKP26-BUB00)
F/R Progressive - spring rates listed rates are final rates
358front/375rear
(vs stock G35 Coupe) F+14% R+11%
Transfers +3% spring rate balance to front
F drop –0.3”
R drop –0.2”
RS*R for G35 (30-N400) (32-N400 for Ti2000)
Front Spring - Progressive Design
Rear Spring - Progressive Design
315front/315rear - rates shown are finals
(vs stock G35 Coupe) F+0% R-8%
Transfers +8% spring rate balance to the rear
F drop –1.0”
R drop –1.2”
RS*R for 350Z (30-N200) (32-N200 for Ti2000)
Front Spring - Progressive Design
Rear Spring - Linear Design
345front/417rear - rates shown are finals
(vs stock G35 Coupe) F+10% R+22%
Transfers +12% spring rate balance to the rear
F drop –0.6”
R drop –0.6”
Eibach for G35 Coupe
F/R Progressive – spring rates listed are initial/final
229/337front 274/463rear
F drop –1.0”
R drop –1.0”
Eibach for 350Z
F/R Progressive – spring rates listed are initial/final
259/334front 359/413rear
F drop –1.0”
R drop –1.0”
There are also the following which I haven't bothered to get all the details yet...
B&G Sport Springs
Espelir Active Super Down
Progress Sport
Sprint Performance
Tanabe Dress Up Form SUSTEC DF210
Tanabe Normal Feel SUSTEC NF210
2004 | 6MTs | Diamond Graphite/Graphite
Upstate NY
DHOLLY,
Thanks. Follow up: On the H-Tech for the 350z, the noted drop, I assume that's the drop a Z would have? My g coupe might/should be somewhat lower? I like the rate #'s on them.
Thanks again
Word of caution...don't know what the threashold of how much you drop your G will put your front/rear alignment specs beyond factory recommended specs. Because our G's don't come with proper camber/caster/toe alignment facilities, you may have to go with aftermarket kits...and those aren't cheap. Just make sure, you at least get some alignment readings after your drop because you don't want to be eatin' away on your expensive tires.
nxtour,
thanks for the words of caution. i'm hoping that a "small" drop will give me a little negative camber for "free". but i will have it checked out after all is said & done.
<blockquote id="quote"><font size="1" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote">TEINs are nice. Either the RSR or RSR Ti should do well also.
<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">Geez, wtf kind of 'advice' is that? There are no less than FOUR *very* different Tein downspring options and FOUR *very* different RS*R downspring options available. Some are not even in the neighborhood of oem spring rates like the guy's looking for.<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">
The ADVICE is that TEIN is top notch quality, and regardless of what spring you are looking for from them... is NICE. Same for RSR. I would comment negatively against a brand, but you can't go wrong with either.
I have run over three of TEINs coilover packages on a track built GSR, and loved them. This time around I wanted JICs.
Now lets end the smart ass remarks, and try to keep on topic.
<blockquote id="quote"><font size="1" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote">On the H-Tech for the 350z, the noted drop, I assume that's the drop a Z would have? My g coupe might/should be somewhat lower?<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">Correct...I don't believe there is any difference in the G coupe and 350z oem spring heights so the drop should be the same on the G coupe (the sedan is a different story). Also, I don't know what the initial rates are for the 350z H tech - I have heard some performance driven owners call them a bit soft, and they will transfer a small amount spring balance stiffness to the front, meaning they will increase understeer.
See what I mean about doing your homework? You started off saying you wanted stock ride quality with up to 1" of drop. Now, you are looking at getting a 12.5% stiffer suspension with negligible drop. If that's what you want and can justify the expense, great! At least you have made a more educated decision without shooting from the hip. Pretty important, IMO, when talking about suspensions since you gotta live with your decision every driving moment.
Personally, if I had a coupe and wanted to increase handling performance without the expense of coilovers or camber kits, I think I might try the RS*R for 350z first. Moving the 12% spring rate balance to the rear will help dial out the understeer inherent on the coupe and give a bit more drop. I also like the idea of the linear rear spring, though that might be a little less 'cushy' than what you are after.
2004 | 6MTs | Diamond Graphite/Graphite
Upstate NY
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spring/suspension question
