Cam question for Sp20

[adelaidesp20]

After no luck in sellilng the car on the forums, not that I really wanted to part with my car, I've decided to keep it and perorm some extra mods.

I need to know which Cam the Sp20 needs to be upgraded, intake or exhaust or both ? to meet the jap spec model. How much it costs to buy, where from, how hard to install or a rough estimate on how much to have it professionally installed etc....
What gains from these mods in real kw/hp ?
I am progressing a Unichip/Microtech install and would like to do the cam/s before the ECu upgrade.
any thoughts?

[twilightprotege]

exhaust.

we actually got the same cams in oz as in japan so we're lucky there. initial indications appear that the intake cam is enough for good performance from the engine, however the exhaust cam is poo. it needs to be made larger for sure. to have 1 cam installed assuming there are no need to change the shims would take 1 hour.

an ems will definately get the most out of the car. i had my car retuned on monday and over the stock ecu i have more power everywhere. obviously low end power accounts for larger torque increase which is what we want. i've still got a bit to gain on the dialing in of my cams but time will tell.

so power gains - stock sp20 is around 73kw atw. my car has pushed a peak 105kw atw at the moment and there is still the possibiliy of further gains through even finer tuning (esp timing wise) and through cam timing adjustments. pretty much all that gain has come from intake, exhaust, cams and ems. you've got the intake and exhaust sorted, get the cams and ems and you can get 100kw atw

anton has his unichip for sale at the moment which should be a straight drop in i'd think (with tuning ofcourse)

[goldsp]

hahahaha go turbine for the same price twiggy has spent on his car or cheaper .

then run 1/2 sec to a sec quicker then the NA modded sp20 over the quarter.


im considering that route atm

[Cosmo Dude]

Originally Posted by goldsp

hahahaha go turbine for the same price twiggy has spent on his car or cheaper .

then run 1/2 sec to a sec quicker then the NA modded sp20 over the quarter.


im considering that route atm

Sometimes turbo is too easy Boost has it's own problems.

[MitchEG]

dont forget that the sp20 engine also has a habbit of flying apart when turbo'ed unless u beef up the internals. Join the msprotege.com zoom zoom boom club :P

[goldsp]

nah internals only go if your a crazy mofo. you can run 5-6 psi easy with stock internals.

but US boys say to run internals incase of a boost spike

[MitchEG]

ah yes, i think they recommend no boost over 10psi. But still, a surprising amount of their engines go pop...even unmodded factory msp engines...The dissapointing thing is, the engine seems to respond well to a turbo in terms of output so its a shame they arent reliable at higher boost.

[chicaboo]

I think 8psi is the highest you can run safely on the 2.0's stock internals. So I would think 7psi would be safer again...

[twilightprotege]

turbine for the same price? sure

7psi on the sp20 with stock internals? see above comment. dont forget we have a higher compression ratio compared to the yanks and also we have a larger intake cam (therefore more air gets pushed in)

[goldsp]

Originally Posted by twilightprotege

turbine for the same price? sure

7psi on the sp20 with stock internals? see above comment. dont forget we have a higher compression ratio compared to the yanks and also we have a larger intake cam (therefore more air gets pushed in)

seriously tiwggy no need to get upset. just cause you spent more then a turbo setup on your NA engine. You chose to go a different way

[Fro-Daddy]

actually, the MPS6 has a 9.5:1 comp ratio...

[twilightprotege]

did i spend more than a turbo setup?

the ONLY difference in what I have done and what you'd do for a turbo are the following.

cams

everything else such as header (turbo gets an exhaust manifold and dump pipe) and injen cai (you need intake plumbing anyway + IC) you'd need for a turbo car anyway (rest of exhaust and ems).

yes i got my head ported, but in hind sight i shouldnt have so if i had my time again i wouldnt have done it. so if you can get a turbo for the same price as cams you're doing well.

i wasnt pointing out what I had spent, i'm pointing out that turbo isnt the only answer and NA is certainly a lot more reliabile on our engines for the same price. hell i'd love to see your car with a snail, just dont come complaining to me when at 5psi (or even less) you snap a rod in half

[twilightprotege]

and i'll add too, i've finished spending money on the sp20. i have a new "project" sitting out the front of my place now.......

[platypus]

Originally Posted by twilightprotege

and i'll add too, i've finished spending money on the sp20. i have a new "project" sitting out the front of my place now.......

ANDY!!!! i can't belive your going to do that!!!

bugger bring connor back inside! you can't make a bouncer out of him yet!!!!


but seriously was it mazda? is it the dream?

mmmm NA predictability and reliability... oh so true... unless you have a boost happy 1.6

[twilightprotege]

not a mazda

[platypus]

gah! nooooo the RX7???

so gunna come beat you up young man!


ok i'm over it

[wiredone]

Originally Posted by goldsp

nah internals only go if your a crazy mofo. you can run 5-6 psi easy with stock internals.

but US boys say to run internals incase of a boost spike

(sorry if this sounds harsh) but this sounds like the brushing aside "meh... thats so easy i won't even bother" that makes me question is legitimacy

Any setup is dependant on many factors, the biggest of which in our country is:
A. our gay ass compression ratio compared to the states (they run lower so comparing us to them is silly)
B. our gay ass machine ron octane rating (yes its 98 but it burns at about 82 making it much less quality than the US, because they list they're octane rating as machine ron which anyone at elf race fuels or any other supplier will tell you is the stuff you want)

I ran 8psi daily on stock internals but i had a full ECU many other supporting mods and a very very good tune, this added to the fact that i only filled up at very minimal servos purely for quality made it all ok. But on the other side if it was as simple as going to your local super cheap and gettin on of thos "turbo fings that my mate with the skyline has" and fitting it that afternoon it would have been done countless times... It can all go wrong very fast...

Soon as the months go by hopefully our streets will be flooded with turbo'd sp's (sorry twilight =p ) but i from personal experiences know that i don't want anyone to have to deal with an oily engine bay and a tow home... So proper planning is always necessary ...

Well there it is my 2c (plus dream added... lets make it happen people) abit off topic from cams but there it is...

ps... fun sp20 turbo facts: (just to get you excited)

1. Expect around 140kw atw = on 8psi with a decent setup on stock internals all day ever day (that is until you want more.... hehe... and lets face it you will, its the dark side)
2. Our weekest part is both the rods and the duel length inlet runners on our aussie spec car when turbo'd (take the butter flys out.... trust me, i'm not the only one)