Cams A Lumpy Idle

[CruiseLiner]

my 272/11.35mm lift jun cams sound almost like a rotor at idle, its abit over the top for daily use but does sound mean as hell

[NXTIME]

Apexi 290/11.5mm lift cams will do the trick

[Kaido_RR]

my car has lumpy idle...

i think it has something to do with my 740cc injectors and no tune rofl

[Busky2k]

You ricer Roy! Going for the 'sound' rather than anything else!

If anything i crave the RB smoothness. Sounds and feels cool but after a while I get sick of it, like a atmo BOV if you know what I mean.

Was thinking, u want a rough idle, just lean her out a bit to the point where it starts missing at idle load points. Then you get the shakes and misfires and general farting around that you're craving for lol.

Oh yeah 9krpm's 272s sounded pretty damn tough on idle. Probably too rough for a street car I'd say though.

[PurpleR32]

You make me laugh

The only time i've heard an angry RB is when there are some large cams being used like in Daves car... and the old Jet33... Jacks car has a very slight difference but not major

They werent 260/8.5 though

Jacks car sounds awsome, but not too cammy. Has a slight lump. The 280's i have on my car though. Fark that sounded angry. Oh the memories

[Bass Junky]

Roy.

Just set your idle target to like 600rpm. Then close up the idle air control.

Done.

[paulr33]

make the airflow meter pipework really hacky, backyard style to cause chuffing, that will give you a really stupid idle for a cheap price

[Roy]

I want a decent idle plus the performance gains. so if there are ways to tune for a reasonable idle with a bit of lump, then it looks like HKS 264s are what i will be getting

[Abo Bob]

There's some really good ideas in this thread. Have you tried feeding your engine banana's instead of 98?

[ferni]

ahahah Troy, you want to make your 122 sound like a 427?

[paulr33]

[DoughBoy]

There's some really good ideas in this thread. Have you tried feeding your engine banana's instead of 98?

Aiiee, the good ol' banana in the tailpipe.... although I've heard that since moving to Melbourne Troy's been getting a bit of the banana in the tailpipe... and enjoying it!

[Color_Of_Green]

I have HKS 264s in my R33 GTS-T and have a mild lumpy idle, and yes making leaner will make it sound lumpier.. I made mine a little richer as neighbours were complaining about exhaust noise.. but will change back when I get my quieter twin system ;-)

Good midrange too...

Edited May 1, 2006 by Color_Of_Green

[WazR32GTSt]

options as i see it:

- some expensive, but high-lift cams

- ej20 conversion

- wire up a switch to cylinder #1 and kill the spark when at idle

- record the noise of a 427ci engine and put it on CD and play it while driving

- make the noise yourself when driving and convince your passengers you're not crazy

hope you find a solution

Warren.

[TTT]

another vote for ej20 conversion.

but not the newer ones..

go for one from a 92 RS liberty or something..

they sound lumpier.

sick

[BHDave]

Put a CA in it and pull the coil out of cylinder 4.

Then not only does it sound like a 427, but you have the fuel economy to match

[Roy]

Aiiee, the good ol' banana in the tailpipe.... although I've heard that since moving to Melbourne Troy's been getting a bit of the banana in the tailpipe... and enjoying it!

...well how else am i to get this money togther for the "GTST of extraordinary magintude"

And thanks for all the informed responses hillbillies

[Bass Junky]

Hang on.

Dont you need to adjust the rev limit to like 600 rpm.

You did that on mine and it was tough as!

Just somehow hook up a switch to it.

[Beer Baron]

mate, you will find even the 260/260 poncams can give a quite lumpy idle. it's in how it's tuned and how the cams are dialled in. even my GTR with stock cams but adjustale gears has a bit of 'funk' to it at idle. Nicks GTR with poncams and cam gears is very lumpy at idle.

troy the count is on your side. a nice lumpy idle is the go. do it.

[Roy]

Well the cams will go in after the nect run at Sandown, so will buy the HKS jobbies in a few weeks time. Want to see what the car can do in its current guise