whats up guys i need some replies before i do this. a friend of mine is selling some HKS 272s. they have relatively a few hundres miles on them, thats it. he wants 300 for both. thats as good a deal i have ever seen on them used. anyway you can see my mods listed below. i know im going to need headstuds and ill install those with the cams, but do i need anything else??? i was going to go without the gears for now, just get a tune when i get them in. what about injectors, or anything else dealing with fuel delivery??? any suggestions. while im at it i may as well do it if i need it. thanks guys let me know.

 

come on guys dont let me down. im gonna do this within the next few days.

 

If you are running 272/272 other than the rough idel, you will need to reflash your ECU it make it livable.....

 

You do not need the gears, it has pretty much been proven that you may get 5 hp with gears, not worth it.

Shane

 

the injectors should be able to handle anything the stock turbo can put out, so dont push it with your evc (~20psi) and you'll be alright.

 

cams with all other mods will compensate more whp when you tuned it,

first if you ensure the stable idle ability on 272s' on dynoflash,

then you can put:
bigger injectors,
APR Head studs,
fuel pump,
Gears,
better bov and pipings,

tuned the car when you put all those parts on,
otherwise, you have re-tuned it everytime you change something majors (like injectors)

hope this help.

 

Get a pump, to be on the safe side. The stock injectors should be ok. The tune is a must.

As for the gears, the 272s have a pretty lumpy, nasty idle without them. Some guys like that. Personally, I don't, and will be putting Fidanzas on the car to dial out the overlap, and get the idle closer to stock.

But yeah, with just the pump and a tune, you should be good to go, and see some nice gains.

 

Hatorade is correct.

The fuel pump is always worth the low $$ it takes to get it, and eliminates the real weak link in the fuel system (factory fuel pump)

You don't need larger injectors.

The cams have a bit of a bumpy idle, but this is very mild if the ECU is properly tuned. If you want a stock smooth idle, you will need cam gears to reset the cam timing, and this will not adversely affect power...in fact, you'll get a few more hp up top.

 

I'm new to the Mitsu sceen but in the honda world if you wanted to do lumpy cams like those valve springs and retainers were a must if you wanted any type of longevity...is that not the same with Evo's? How strong are thier valve springs?

 

The EVO doesn't have exceptionally firmvalve springs by any means. The lobe shape of the factory cams and the HKS cams are what allow one to get by without needing stiffer springs.

 

thanks for the replies guys. i think ill go with the 272s. maybe in the spring time ill get the gears or something. i think ill get the headstuds and the pump right away with the 272s. so once i get these in with the new pump is my gas milage gonna go downhill or what???? at least maybe until i get it tuned???

 

Theoretically, the larger fuel pump shouldn't make a difference. In actuality, it does because the sheer volume tends to overrun the fuel return line's capacity. It shouldn't make much difference at part throttle, only because the ECU will detect any change in the mixture and correct it. It will however change the WOT A/F a bit, and for this you will need a reflash.

 

yeah i drive a lot with more than partial throttle due to a lot of highway driving. this is the main reason im getting the cams so i can have a bit more top end power. i may purchase all the things i need now, then in the spring put all of it in and get a tune right away, as to save on gas milage and $$$$ tuning.

 

really, cause the charts i've seen from people who know how to tune definately show a gain with gears, (even with stock cams). That looks like ~25whp to me

 

By that dyno your also loosing some low end power and torque as well as slowing the spool up. Not that there isn't a gain in cam gears; I just wanted to point that out.