I am wondering if there is any other place besides mantapart to buy some stiffer valve springs...
or i read on here that some people use the 2.3 ones.....
if so are they better than the ones at mantapart or maybe just as good
and if you guys think i should go with the 2.3 ones does anyone know part number for them.....or do i just use pre 95 2.3 ho ones
I already ported and polished the head and have everything else besides valve springs...
well... if you didnt put HO cams in, you really dont need stiffer springs, i would advise just going ahead and buying a brand new set of 2.4's from GM, they are like $60 IIRC.
my secret cams work just fine with the new 2.4 springs i used in conjuction with them.
BUT, if your still wanting stiffer springs, GM also sells the 2.3 HO springs for around the same price (BUT im not sure if they will work with the 2.4 33mm lifters though, you just may have to use HO cam towers and get the bigger 35mm lifters, but also not sure if they will work with stock or otherwise 2.4 cams), and i do believe j-body performance has some stiffer 2.4's as well.
Not to sound condescending, but why do you think you need stiffer springs? Maybe there's another answer to your question..
-Matt
-----------------------------------------------------------------
For my next trick, I'll turn your momma out.
I know you can use the 2.3 valve springs but you have to use the 2.4 retainers or something like that. Ask Wrench Monkey or Brian...I am sure they would know for sure.
I'm guessing the reason he wants stiffer springs is to rev higher and prevent valve float.

2010 Subaru Impreza WRX Limited
1999 Cavalier Z24 Supercharged
1999 Grand AM SE (Beater Car)
1997 GMC Sierra
2007 Honda CBR 600RR
2005 Honda TRX450R
Luke Heier wrote:I'm guessing the reason he wants stiffer springs is to rev higher and prevent valve float.
Well.. yeah.. I mean, I can see that as a plausible benefit, but he would probably benefit more from swapping his stock valves with SS ones since it's the same amount of work, and almost the same cost..
The outcome would be that the SS valves would be lighter then the stockers which equals to less forces being placed on the spring thus allowing for a safer/higher rev.
I'm not saying that swapping valves is a replacement for some crazy dual valve spring setup from Mantapart but even if he does want to rev higher won't the limiter keep that from happening in the first place since he has an auto?
-Matt
-----------------------------------------------------------------
For my next trick, I'll turn your momma out.
well the main reason is that yes i would like to eventually rev higher....and never said about not having ss valves....and yes i have the secret cam swap in there also...
just need valve springs now to complete the full head package....
i would also like to put on an ho manifold and throttle body if i could ever find one....
how hard is it to get the lo manifold to work?? looks and sounds easy dont know for sure....
Even with lighter valves, I would still get stiffer springs just to be safe. Also, springs have a certain tension to them. Once the RPM's get so high, if the spring constant is not high enough, they will not return to their original position no matter how heavy or light the valves are.
As far as the limiter goes, I was imagining the use of HPTuners where you can change the rev limit.

2010 Subaru Impreza WRX Limited
1999 Cavalier Z24 Supercharged
1999 Grand AM SE (Beater Car)
1997 GMC Sierra
2007 Honda CBR 600RR
2005 Honda TRX450R
forgot to add...
or do you guys think the mantapart springs would be good enough....i just know how everyone on here talks about them thats why i was going to try and find some somewhere
else...i have never bought anything from them before thats why i want your guys input....
Don't use a LO manifold. There is no real gain involved, and a waste of time. Just get a HO.

2010 Subaru Impreza WRX Limited
1999 Cavalier Z24 Supercharged
1999 Grand AM SE (Beater Car)
1997 GMC Sierra
2007 Honda CBR 600RR
2005 Honda TRX450R
I personally wouldn't bother with the springs.. But that's me, to each his own I suppose.
Is there an epidemic of springs failing, that I'm not aware of?
-Matt
-----------------------------------------------------------------
For my next trick, I'll turn your momma out.
Luke Heier wrote:Don't use a LO manifold. There is no real gain involved, and a waste of time. Just get a HO.
ive heard gains of 10whp with just the LO... i do believe its the only one thats actually been PROVEN to add HP. its not really THAT much different, just a smaller log on the bottom is all as far as i know.
as for the springs questions...
i forgot to add that i put my secret cams in my auto car and just used the springs that were on the car-they were used, and they seem to be working just fine. i JUST had my rev limiter raised to 6700, so we'll see if i get any float-but im doubting it, i sure hope to hell they dont.
one thing to be said-getting stiffer springs cant hurt you in any way, if it puts you at ease about the situation, buy them... i myself would do it, never did because it worked for me to just buy new stockers, BUT my next engine build will have stiffer springs.
DO NOT BUY FROM MANTAPART. If you want stiffer springs, go with the Ho springs. Unless you want to rev 8200 + rpm or have a cam with more than 450" of lift, you don't need stiffer than Ho. Other solution is 350 springs but you need more than the springs.
Gilles
2.3 Ho
Mfk-223 wrote:DO NOT BUY FROM MANTAPART. If you want stiffer springs, go with the HO springs. Unless you want to rev 8200 + rpm or have a cam with more than 450" of lift, you don't need stiffer than Ho. Other solution is 350 springs but you need more than the springs.
ive always wondered why everybody says "do not buy from mantapart" not saying DO, but how come? ive never personally bought from them because ive always heard "do not buy from mantapart" but have never really gotten a straight answer as to why...
are the W41 springs any different than the HO's?
I bought an aluminum flywheel from them, and could never get a call back regarding installation issues..
I couldn't even get a hold of anybody.. Just an answering machine.. Probably on a small end table in a corner of a large warehouse..
They're parts as far as I know are 'ok' but don't expect to actually talk to them unless it's regarding giving them money.
-Matt
-----------------------------------------------------------------
For my next trick, I'll turn your momma out.
z yaaaa wrote:Mfk-223 wrote:DO NOT BUY FROM MANTAPART. If you want stiffer springs, go with the HO springs. Unless you want to rev 8200 + rpm or have a cam with more than 450" of lift, you don't need stiffer than Ho. Other solution is 350 springs but you need more than the springs.
ive always wondered why everybody says "do not buy from mantapart" not saying DO, but how come? ive never personally bought from them because ive always heard "do not buy from mantapart" but have never really gotten a straight answer as to why...
are the W41 springs any different than the HO's?
see thats what im wondering also...
but i also just found these springs from lunati at advance auto parts...
http://www.partsamerica.com/ProductDetail.aspx?MfrCode=LNI&MfrPartNumber=73815&PartType=173&PTSet=A
i think i might go with these just cause ive heard more about lunati than mantapart.....
The Ho and W41 springs are the same.
As for Tim and Mantapart, it's just a big joke. ALOT of people didn't get what they bought. A guy on Quad 4 forum paid 750$ + and stil doesn't have his parts after waiting a long time.
BBB report
Read what's on the link and you'll understand.
Gilles
2.3 Ho
I'm actually surprised that they're still in business... People have been having the same shady dealings with them since 2002.. or before..
-Matt
-----------------------------------------------------------------
For my next trick, I'll turn your momma out.
z yaaaa wrote:ive heard gains of 10whp with just the LO... i do believe its the only one thats actually been PROVEN to add HP. its not really THAT much different, just a smaller log on the bottom is all as far as i know.
Blasphemy I say.... No the LO was never proven to make more HP, some guy just claimed it did.... No proof was ever given.
PRND321 Till I DIE
Old Motor: 160whp & 152ft/lbs, 1/4 Mile 15.4 @88.2
M45 + LD9 + 4T40-E, GO GO GO
i bought the 1mm oversized valves from car customs.. and i know to use the 2.3 springs, you'll need the 2.4 keepers, but 2.3 retainers.. so my question is.. can i still use the 2.3 springs with my 1mm oversized valves??
When I step on the gas, I want people to think the world is coming to an end! - Homer J. Simpson
-MD- LD9 wrote:z yaaaa wrote:ive heard gains of 10whp with just the LO... i do believe its the only one thats actually been PROVEN to add HP. its not really THAT much different, just a smaller log on the bottom is all as far as i know.
Blasphemy I say.... No the LO was never proven to make more HP, some guy just claimed it did.... No proof was ever given.
lol... "heard" wasnt stating that i actually did see it...
z yaaaa wrote:-MD- LD9 wrote:z yaaaa wrote:ive heard gains of 10whp with just the LO... i do believe its the only one thats actually been PROVEN to add HP. its not really THAT much different, just a smaller log on the bottom is all as far as i know.
Blasphemy I say.... No the LO was never proven to make more HP, some guy just claimed it did.... No proof was ever given.
lol... "heard" wasnt stating that i actually did see it...
That PROVEN part it what got me.
Golden Trojan wrote:i bought the 1mm oversized valves from car customs.. and i know to use the 2.3 springs, you'll need the 2.4 keepers, but 2.3 retainers.. so my question is.. can i still use the 2.3 springs with my 1mm oversized valves??
Ask Karo at carcustoms he should know.
PRND321 Till I DIE
Old Motor: 160whp & 152ft/lbs, 1/4 Mile 15.4 @88.2
M45 + LD9 + 4T40-E, GO GO GO
every 2.3l spring is the same if it's w41 HO LO doesn't matter there all the same minus the 95.
You have to use the 2.3l retainer and the 2.4l keepers and yes they fit in stock 2.4l cam towers.
Yes you can use 2.3l springs on 1mm over sized valves why wouldn't you it's still a 2.4l valve.
so your supposed to use the stock 2.4 valves with the 2.3 spring setup...?
I was told in order to do this swap, you have to use the HO valves?
now DIE!
No you can use stock valves or ss 2.4l valves useing the 2.4l keepers and the 2.3l retainer and 2.3l springs.
Yes you can run HO springs but in order to do that you need to drill out your valve guilds and press new 2.3l ones in and use 2.3l keepers.
Does anyone know exactly how much stiffer 2.3 springs are than 2.4 ones?

FORGET GIRLS GONE WILD WE HAVE GOVERNMENT SPENDING GONE WILD!