Toyspeed.org.nz Message Board

by **no_8wire** » Wed Oct 25, 2006 9:00 pm

Well I have decided that the stock springs are not going to be enough for my new engine, as I want to rev to about 9000-9500rpm...and currently they bounce at roughly 8200rpm...

keeping in mind that this will be a boosted application, does any have any recommendations as to what brand springs will suit my needs?

Boost will be about 18-20psi...

by **Bazda** » Wed Oct 25, 2006 9:37 pm

wtf 9000 rpm! on boost with a 7A crank and non forged rods......

by **no_8wire** » Wed Oct 25, 2006 9:40 pm

nope...going to pauter rods..stated the rpm I wanted and they said the rods woulf be fine...

by **Bazda** » Wed Oct 25, 2006 9:45 pm

no_8wire wrote:nope...going to pauter rods..stated the rpm I wanted and they said the rods woulf be fine...

oh yep sweet. So you going to be running big lift cams i suppose and a nice big 500hp turbo

by **no_8wire** » Wed Oct 25, 2006 9:47 pm

nope..stock cams...I still want it to idle... :lol:

At the moment I am sticking with a evo 4 TD05h...see how that goes...faster spool is what I want...

by **Bazda** » Wed Oct 25, 2006 9:56 pm

I dont see why u would want to rev it to 9k as the power will prob drop off at around 7k with stock cams and that turbo....

also with big cams it should idle, as long as you run quad throttl bodies with a decent ecu to control it.

dads race car has crazy lift and massive duration and it idles like a road car and he buzzes that to 9-9500 at the track.

by **no_8wire** » Wed Oct 25, 2006 9:59 pm

im using a smallport 16v though...no quads on this baby... :lol:

by **Bazda** » Wed Oct 25, 2006 10:05 pm

no_8wire wrote:im using a smallport 16v though...no quads on this baby...

i still recon u def wont be reving it to 9k.

by **no_8wire** » Wed Oct 25, 2006 10:07 pm

mmm....well I will try...haha

need to upgrade anyway to handle the boost...isnt that why yours dropped the valve?

by **Bazda** » Wed Oct 25, 2006 10:15 pm

no_8wire wrote:mmm....well I will try...haha

need to upgrade anyway to handle the boost...isnt that why yours dropped the valve?

only cos im using 25psi+, all other 16v guys with turbos are running over 18psi with stock heads.

by **CAMB01** » Thu Oct 26, 2006 1:32 pm

i'd have to agree with Bazda, 9000rpm with stock cams is just stupid, cams are what control the power band of an engine. Power will fall off well beyond that.

by **no_8wire** » Thu Oct 26, 2006 2:51 pm

I thought as long as you can keep on adding more fuel+air the power will keep rising?

by **AceSniper** » Thu Oct 26, 2006 2:55 pm

stock cams + more rpm = less time to fill chamber = less air fuel in chamber to burn

by **matt dunn** » Fri Oct 27, 2006 12:41 am

no_8wire wrote:I thought as long as you can keep on adding more fuel+air the power will keep rising?

No. Powerband is majorly defined by cam specs.

by **gmacrae** » Sat Oct 28, 2006 10:07 am

wtf, you want quick spool AND you want 9500 rpm?

Aint gonna happen buddy, that turbo and cams will have run out of breath LONG before you get to 9grand. To make proper use of those kinda revs you'll need some decent cams and a fairly big turbo... = lag.

If you're running standard cams and that turbo, you dont need any more than 7500ish rpm max and stock springs. You'll still have 4000 rpm of powerband.

by **Pelo** » Sun Oct 29, 2006 5:43 pm

Antilag for the win!
This is getting expensive no8!

by **no_8wire** » Sun Oct 29, 2006 6:00 pm

Well I figured...build it tough...I mean im going to be driving it...and I know what Im like!

and if your going to blow your bugdet...blow it in style ( 3x orginal) haha

by **suberimakuri** » Sun Oct 29, 2006 6:38 pm

if 4age, and stock cams and good turbo I would turn to 8k.

toda springs are in my motor and lots of other NA motors in japan and seem ok.

but i'm not sure what happens when you get lots of boost in it, toda ones might not be good after 20lbs.

Listen to those that already posted, it's a myth that you get bad idle with cams and standalone.

by **crnkin** » Sun Oct 29, 2006 7:50 pm

Dispite the fact you need bigger cams for 9500, you will need valve springs, that im sure of. I know alistar will be running into issues very soon and hes only running 18psi, I do however not know which ones to get, and im very intersted in someone answering the actually question, now that weve established youll need cams too!

I hear the toda ones are mint for lower boost (under 23ish psi) and NA, but someone said, maybe baz? that theyre only rated 50% higher than the stock spring rates? And i think its baz that knows a good place in oz? might be glenn, cant remember right now

by **Bazda** » Sun Oct 29, 2006 7:52 pm

crnkin wrote:Dispite the fact you need bigger cams for 9500, you will need valve springs, that im sure of. I know alistar will be running into issues very soon and hes only running 18psi, I do however not know which ones to get, and im very intersted in someone answering the actually question, now that weve established youll need cams too!

I hear the toda ones are mint for lower boost (under 23ish psi) and NA, but someone said, maybe baz? that theyre only rated 50% higher than the stock spring rates? And i think its baz that knows a good place in oz? might be glenn, cant remember right now

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