After a lots of work on my head and the delta cam...

Sorry guys but noise your hear at 3500 rpm (3509 exactly) it's the mivec ... it's try to kick but it's not able with the new cam... normaly when mivec kick the oil pressure down quickly for send oil in the rocker for tight the valve. But with the new cam the oil it's not able to go in the rocker. (The oil pressure gauge send higher pressure when mivec try to engage)

Just disconnect the mivec solenoid plug in the engine bay and no more noise... But you lost your Mivec. Anyway you dont have one with delta cam.

If you lost power over 5500 its normal without mivec... mitsubishi but this system for give more hp at high rpm...

But back your stock cam, you loose more with delta cam (without) than oem cam + mivec.

I'm very dissapointed of Delta Cam... Lost of time, lost of money for nothing.

stainless washer or tighter more the valve change nothing.

 

in the other thread, i mentioned this. and the answer i got was that the MIVEC lobes were not changed, could they not make everything work with MIVEC? how do the EVO 9 guys do it? do they lose mivec with aftermarket cams?

Good find though

 

What if you got an aggressive grind before mivec and disconnect the mivec. Kinda like toda vtec killers. You wouldnt have mivec but the aggressive grind should make up for it. Tuning would be a must though because i would think disconnecting the mivec would cause a cel.

 

I now feel much more comfortable about the RRM cam that's been sitting in my basement for the last little while.. I look forward to not having to add washers or disconnect the MIVEC solenoid once that sucker finally goes in.

 

too bad they discontinued it

but at least i have one

 

Not trying to start a fight but.....

Do you have any dynos proving a loss or a gain with the oem cam over the delta?

Do you have a video showing the cam with the spacers for sound ?

Have you talked to delta about it ? They are very helpful :

Like I said im not trying to start a pissing contest , I'll be one of the first to put back the stocker if there's any real proof that it's losing hp but I've seen improvements in sprint racing which is why I'm leaning more to the side of it being noisy but doing its job. Although when the cam was installed so was my p&p head, timing belt maintainence, and a new set of solid motor mounts so it is possible I'm feeling the improvement from other parts of the car.

 

My research had led me to understand that oil pressure increases at Mivec engagement in the 4g69 motor specifically. I will do some more research then offer a more detailed response.

http://www.theautochannel.com/news/2...02/171934.html

Did you tighten the valve springs with the washers?

 

I just had a 30 min conversation with Delta to try and sort this out. The only major modifications done were to the big lobe, exhaust lobe, and increased ramp rate. The Mivec lobe was not touched.

The increased ramp rate is the culprit of our valvetrain noise...not that Mivec is not working.

Lakuzard - you're the first person who has stated that Mivec is not working...Delta has done 15 of this same spec of cam.

I will say it again...this cam will affect your top end, but you powerband will be smooth. Until we have Hackish's software we will not be able to supply more fuel post 5700 rpms. It won't happen....maybe with RRM piggyback.

Look at this RA dyno sheet.

https://www.evolutionm.net/forums/04...-retune-5.html

Our car does not make any power after 5700 rpms or so. It's factory stroker motor...that's how it works.

As you can see with those dyno sheets, with better engine management we can most certainly get more out of it. Also this guy had a cam gear so he could freely adjust his powerband.

 

Sounds like your build is coming along nicely, I'd be interested in seeing a clip or two if you haven't put any up already.

After p'n'p head (the RRM cam I have is a stage 2, not sure if it would be appropriate just to drop it in to the stock head) I don't really have any more plans for engine mods. Would be nice to see what it might turn out like!

 

From what I hear is you generally get noise with most after market cams. So I don't buy that moved is not engaging. And I would also think mivec would need more pressure.

 

continued in my thread here https://www.evolutionm.net/forums/04...alliart-5.html ....

 

Thanks for the link, *unrelated posting will cease at this point*

 

I'm disappointed of you mind guy... I can't accept this noise when the mivec kick. I don't have a honda, I dont do gabarage swap in my house, I dont remove my passager seat or back seat or whatever for loss weight, I dont cut my coil for drop the car...

I cant resume my mind to compare mitsubishi tuning to honda tuning...

This Cam is a insult for me. It compare the both.

I try and loss so much time to find good part and company for my car. Whatever the price I pay for the part... I when quality.

It probably work and do the job ... Personnally this Noise have nothing of "Normal".
I am still wondering if we ear the same noise.

I don't have take video or whatever. I am rather try to resolve the problem and finally swap back to the stock. I am to shiny to ride my car with a so weard noise...

According to me, not every cams make this noise and I order the Rpw cam for prove my word.

It cheap solution to do regrind. If I want cheap I will go buy a turbo kit on ebay and dont wait the michael turbo kit .

I'am post for help other guy with their ralliart for tune correctly their car, not for help them to broke their engine.

 

Lakuzard - firstly your English writing is incredibly hard to decipher. Secondly, no one is questioning your dedication to your car in regards to quality and perfection.

I fully recognize the noise you're referring to, and it doesn't bother me. There is absolutely no need to be on the defensive here, we are a forum of people trying to help each other out.

I know for a fact, the RPW cam makes increased noise at Mivec.

I ask you once again, did you install the shims as a measure to quiet the Mivec crossover? This question makes or breaks the integrity of this entire thread.

 

hello, here in Puerto Rico several of my friends have bought some cams from that company and encountered the same problem, the MIVEC does not work and makes a ugly noise that is not normal.