hi

I have Miata na 1840cc turbo 370 whp
now I do some change up to 450 whp

my engine

wiseco pistons

carrillo rods h beam

head

ferrea valves,retiners and dual valves springs(70lbs 35 mm)

now I replace the oem camshaft (kelford 272/272 10mm )

who much rpm capable with hydraulic lifters?
thanks

 

You need to switch to SUB.

 

Thanks

I do a little check and maruha racing and toda racing have this sub.
Some one have Experience with this company?
What the best camshaft for rev limit 8500rpm 272:272 or 264:264 ?
The booth camshaft i lift 10 mm

Thank

 

OEM oil pump?

 

Yes

 

You will need a Boundary Engineering oil pump if you want to rev that high and have the oil pump survive any amount of time.

 

You're gonna need a billet oil pump for either 8500rpm or 450whp, for both you definitely want one.

I can't help you on cam selection, but for 450whp I wouldn't think they are a big deal, Soviet hit that on stock cams.

 

Like this?

http://www.toda-racing.co.jp/en/product/other/b6-oilpump.html

 

I can work with stoke camshaft but i wont to improve the top end.
My gol is power stable to 7800 and after the power down until 8300rpm

 

Not sure about that toda one, this is what most of the people here use: Mazda\Ford\Mercury Oil Pumps

I'm not sure I'd risk an engine costing several thousand dollars to save a few dollars on the oil pump.

 

you need billet oil pump if you rev that high.
that should be your #1 concern, like these guys are telling you

 

Also ATI harmonic ballancer. Especially if you plan on making power that high for an extended period of time.

 

I'm surprised he hasn't blown the engine with stock pump and 370whp already

 

ok the recommend take the high flow pump but this pump have pressure from 66 psi to 91 psi.

who much oil pressure the engine able carry?

thanks

 

The motor will take the pressure those pumps put out, many people use there pumps.
Miataroadster.com sells billet pump gears as well.

Use super tech shim under bucket, and super tech lash caps. Make sure to have your spring pressures tested to match kelfords specs

 

Ask your engine builder, I think the pressure you want depends on your bearing clearances.

 

10 psi per 1000rpm is a good rule if thumb

 

What abut the oil seal?

 

the kelford has arrive