how to raise the redline to 9k

Post by **Oneor1** » Mon May 12, 2003 4:46 am

whats up guys, I dont plan to take any action on doing this for quite a while but was curious for future reference.

What all do you have to do to raise the Redline to 9k, im guessing some basic things like valve springs, retainers, ECU reprogrammed.... what else?

-Rick

Post by **paul_s13** » Mon May 12, 2003 4:46 am

Try to find an uprated oil pump, and a set of lightweight rods would be good.

Post by **Nathan** » Mon May 12, 2003 4:46 am

over on sxoc.com they were talking about the rev limit being significantly lower... http://www.sxoc.com/vbb/showth...limit

Post by **paul_s13** » Mon May 12, 2003 4:46 am

Nathan wrote:over on sxoc.com they were talking about the rev limit being significantly lower... http://www.sxoc.com/vbb/showth...limit

Yep, I've remapped my chip so the limit is now 7500rpm, I doubt there is any point going higher unless you have some strong internals.

Post by **TommyTheCat** » Mon May 12, 2003 4:46 am

i think one of the only ways to do it safely would be to change the rod x stroke ratio and use very tough parts.

Post by **Spectre_240sx** » Mon May 12, 2003 4:46 am

I'd always heard the the CA was a pretty Rev-happy engine. That isn't the case?

Post by **NeedCAforS13** » Mon May 12, 2003 4:46 am

it is rev-happy, but not to 9k w/o mods:D

Sean

Post by **themadscientist** » Mon May 12, 2003 4:46 am

my DE was speedshifted at 8000 rpm during races and showed no adverse effects. Then agin it didn't have 15 lbs of boost pounding on the pistons at the time.

Post by **Spectre_240sx** » Mon May 12, 2003 4:46 am

Well, by rev-happy I meant 8k redline with nothing but upgraded valve springs.

Post by **nomore_mr2** » Mon May 12, 2003 4:46 am

um its very argueable subject. in my research and talking with some jap tuners i found that upgraded valve springs bigger turbo(the stokc one is no good at this point anyway) and a rev limit remover and you can rev to 8500-9k pretty easily. i wouldnt recomend doing it every day. i was going to set up my motor for 9500 rpm now nathan can play with it

. look out for my new ca project with a respectable rev to 9k.

Post by **Oneor1** » Mon May 12, 2003 4:46 am

so mr2, your saying basically valvesprings, upgrade turbo, and ECU programmed and thats it?? haha sorry to repeat what you just said just trying to make sure thats it

let me know

Post by **nomore_mr2** » Mon May 12, 2003 4:46 am

yup thats it. stock rods are fine and VERY stout from the factory. i would also put in a headgasket but you shoudl do that anyway.

Post by **Oneor1** » Mon May 12, 2003 4:46 am

what size turbo upgrade would suffice?

Post by **Spectre_240sx** » Mon May 12, 2003 4:46 am

While replacing the head gasket, you might look into using studs rather than head-bolts as well.

Post by **nomore_mr2** » Mon May 12, 2003 4:46 am

no one makes aftermarket studs for a ca and stock ones aer just as good. no one has ever had problems with them. only the crappy headgasket.

hey one abouta turbo. that all depends on application and goals. i'm not talking about like a gt2540 or t28 or something i'm tlaking like td06 20g+ size. gt2835 would prolly do it 3037 t-78 t04r something with big top end.

Post by **float_6969** » Mon May 12, 2003 4:46 am

has anyone actually done any flow testing on the stock head to see what the peak effeciency range would be? Are the stock manifolds and head capable of flowing that much gas effectively? I think that would be a major determining factor as to what and EFFECIENT revlimit would be. I mean, If I build my KA right, I can prob rev it to 8G's but my power up that high is going to be worthless because the head just can't flow that much air. Just a though.....

Post by **alfred183** » Mon May 12, 2003 4:46 am

...a month later...Does anyone know where to get these upgraded valve springs? Any part numbers? Any first hand experience replacing these?

Post by **chezina** » Mon May 12, 2003 4:46 am

Jun,Tomei,HKS and a few others make valve springs for the CA.With the right tools it's not that hard to do.

Post by **drumma022** » Mon May 12, 2003 4:46 am

Can anybody find me a set of valve springs for me? Or at least part numbers for the HKS here in the US.

Post by **float_6969** » Mon May 12, 2003 4:46 am

Go HERE to find the valve springs. JUN makes just about EVERYTHING you could want for your CA. Course your gonna pay for it too.....

Post by **float_6969** » Mon May 12, 2003 4:46 am

Since we hauled up this thread from a month ago, I'll ask my question again too! TMS, or nomoremr2, you might have this info. Is that head/intake manifold going to flow air effeciently at 9G? Do we have any info as to what the max air flow capicity is? Thanks!

Post by **alfred183** » Mon May 12, 2003 4:46 am

What about getting it ported? It would be a good idea, right? What is the max you can port the head?? Any numbers are apreciated

Post by **CA19DET** » Mon May 12, 2003 4:46 am

ARP makes head, main and flywheel bots for the CA, i just ordered some TOMEI valve springs, from my research the hydraulic lifters will give out and begin to float above 8500rpm, this is the case with most engines w/ hydraulic lifters..

Post by **Spectre_240sx** » Mon May 12, 2003 4:46 am

Ok, so solid lifters then?

Post by **CA19DET** » Mon May 12, 2003 4:46 am

yeah from what i ahve seen it is common to get solid lifters, high tension valve springs, brass guides, high lift & long duration cams.

BUT i don't really see the need to rev to 9000rpm+ unless you have a HUGE turbo that only makes power from soemthing like 6000rpm..

i am only getting the cams & valvesprings and new OE hydraulic lifters & seals, my cams use 8.8mm lift and i will only be revving to about 8200rpm if needed, but i think my turbo will be maxed out at that rpm anyway.

Post by **CA19DET** » Mon May 12, 2003 4:46 am

oh and i asked about solid lifters but apparently theyare a pain in the arse to set/shim and sometimes need to be re-shimmed and checked.

i was thinking of making some at a machine shop.

Post by **Spectre_240sx** » Mon May 12, 2003 4:46 am

Well, I think the ability to rev that high itself is good for bragging rights if nothing else, but also, if you increase your redline, doesn't that make your engine stronger at lower revs as well?

Post by **CA19DET** » Mon May 12, 2003 4:46 am

not really, you could be just revving the engine lean & generating allot of heat, and at that RPM thigs start to break. (rod bolts, rods, bearing failure, oil pump failure, main bearing failure etc)

Post by **Vetal** » Mon May 12, 2003 4:46 am

What is "solid lifter"?So, to rev to some 8000-8200, you just need upgraded springs, and that's all? Wouldn't it be necessary to increase oil pressure?

Post by **Jezz_s13** » Mon May 12, 2003 4:46 am

a solid lifter is just that, it's solid, you use shims to set the cam clearance. they are a lot lighter than the hydraulic lifters too.

9k on the std crank, rods, oil pump IMO is a no no.In fact I'd say 9k on the std crank is a no no full stop but if someone wants to try it...

Someone tried 9k before, don't think the pump could cope with it.AFAIK no one does an uprated pump for the CA so I'm guessing a dry sump would be the best way to guarantee good supply.

The crank will begin to flex at those kid of revs too which will knacker the mains and probably other stuff.

I bent a crank revving it to 10k (by accident).

Someone here in the UK is going to be testing jsut how far the std crank can be pushed soon, it won't be pushed further than about 8.5k though I don't think, but it does depend on what rods/pistons you have. The lighter they are the higher you will be able to rev it, less inertia and therefore bending moment.

I'm hoping to rev mine to 8.2k but am dubious as to whether the crank will cope, I will be using stock lifters but with uprated springs and titanium retainers, lightened & hardened crank, ligher pistons and lighter rods.

how to raise the redline to 9k

how to raise the redline to 9k

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