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Nistune Compactibility With Tomei Cams

whitneybra

By whitneybra,
in Engines & Forced Induction

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whitneybra Enthusiast

whitneybra

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R31Nismoid "Brakes, suspension, clutch, diff - I could go on but you get the idea"

Thanks again Im doing the clutch/ light weight flywheel with the 100k service. I have coilovers. Brakes isnt a bad idea but.

STATUS "should not be an issue, yes the r34 nistune has less tuneable addresses than other nistune ecus it wont have an issue (most are cold enrich issues on e85 on really big horsepower setups) , i do however recommend running the std bov to help alleviate the stalling... it is an issue with some setups on r34 ecus. We have made mid 400's on r34 nistunes so they are capable, you may just need to make a few compromises.

Thanks Im running std bov into a metal intake standard airbox z32

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HYPED6 Collaborator

HYPED6

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I hate to brake it to you guys.

It is an issue.

Mainly with Auto cars. You jump on the brakes, bring it up to stall and let go of the throttle..... and basinga it stalls. 7/10 times.

This is plumb back bovs and everything set up correctly.

These are engines with cams and intakes make it worse.

This is on R34 computers. Almost ever other ecu you can change it

The Dan Grand Master

The Dan

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Yes I know. Type A have a smaller duration so they are going to be better for maintaining a factory/near factory idle.

Tomei haven't always done Type A and Type B in a Poncam so I'm sorry I confused you. I confused myself for a minute haha.

Type B aren't necessarily going to mess with idle much either but the fact is, you are better off with the 252 deg cam anyway. It better matches the 3071 for its efficiency range.

34GeeTeeTee Grand Master

34GeeTeeTee

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Hey Dan I'll record my idle for you.... It sounds factory in every way.... Type B poncams.... Not even a slight lump at 900-950rpm idle :)

The Dan Grand Master

The Dan

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Hey Dan I'll record my idle for you.... It sounds factory in every way.... Type B poncams.... Not even a slight lump at 900-950rpm idle :)

Yep, I believe you (although shouldn't it idle at 750-800rpm?)

Most of the problem with these cars with Nistune is when they have aftermarket large cams and plenum.

The point is, no one is saying it can't idle smoothly and not have problems, just that there is a risk involved. If it were auto, had type b cams and Nistune, it would be shit

34GeeTeeTee Grand Master

34GeeTeeTee

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Yeah the idle was set specifically to sound smooth.... Simply cus I asked for stealth :) I LOVE lumpy idles but don't need to give the boys in blue any excuse to lift the bonnet and annoy me

AngryRB Grand Master

AngryRB

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Posted (edited)

Yeah the idle was set specifically to sound smooth.... Simply cus I asked for stealth :) I LOVE lumpy idles but don't need to give the boys in blue any excuse to lift the bonnet and annoy me

me too, was given the choice.. but when its lumpy the engine sounds like it is half way between smooth and stalling, i think its done by leaning it a bit which i wasnt a fan of.

I have the feeling that the cams might possibly even make the turbo a bit laggy on a mildly modifed 3071/76?

Edited by SliverS2
wolverine Grand Master

wolverine

Posted
Posted

Yes I know. Type A have a smaller duration so they are going to be better for maintaining a factory/near factory idle.

Tomei haven't always done Type A and Type B in a Poncam so I'm sorry I confused you. I confused myself for a minute haha.

Type B aren't necessarily going to mess with idle much either but the fact is, you are better off with the 252 deg cam anyway. It better matches the 3071 for its efficiency range.

They have had the type A's for ages as far as I know (neo RB25 engines). I tossed up between Type A's and B's around 7 years ago but was talked into type B's as I was assured there would be no losses down low just a fatter mid range. In hindsight, assuming I was going to install cams, I would choose the type A's to get the extra lift without the extra duration.

As I stated before the type B's have the slightest lump at idle but it is very slight and hardly worth mentioning.

For the OP, Dan has forgotten more than I will ever know so listen to what he is saying.

Hanaldo Grand Master

Hanaldo

Posted
Posted

Yeh my Type-B's give me a slightly lumpy idle. Its actually more taking off in first that I can hear the difference, they have a deeper tone compared to factory cams.

Probably a bit off topic, I just wanted to chime in :D

Dose Pipe Sutututu Grand Master

Dose Pipe Sutututu

Posted
Posted

me too, was given the choice.. but when its lumpy the engine sounds like it is half way between smooth and stalling, i think its done by leaning it a bit which i wasnt a fan of.

I have the feeling that the cams might possibly even make the turbo a bit laggy on a mildly modifed 3071/76?

bam.. on the money, with longer duration cams, you will need to run them a tad richer than stoich to get it to idle without wanting to stall. Or just bump up the revs, but then you look like a tool at the lights lol

The Dan Grand Master

The Dan

Posted
Posted

The problem isn't that they don't idle. The problem is random stalling after accelleration/revving

Anyway, I've said what I needed to. I'm not the one who tunes this shit. I just see it causing problems. You can fit whatever you like but we are just trying to keep you informed of the 'possible' risks in doing so with certain setups

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