280's with 272's cams

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Jun 21, 2007 | 10:46 PM

#16

dmit

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From: las vegas

so why is 280s such a rough idle? in comparison to 272s

Jun 22, 2007 | 03:02 AM

#17

Mellon Racing

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From: Virginia Beach, Virginia

Quote:

Originally Posted by Toddevo 8

if you go 280, you will need to get new valve springs and retainers. I had 280 with no problems at all with the idle.

with the HKS 280's I run the stock springs and retainers and spin it to 8k daily

Jun 22, 2007 | 03:04 AM

#18

Mellon Racing

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From: Virginia Beach, Virginia

Quote:

Originally Posted by 4-BNGR

The more duration you have, the higher the RPM requirements are to achieve peak torque and horsepower. That's why I run 264/272.

It appears that a combo with longer exhaust duration will 1) make power earlier in the rpm band and 2) allow for better pulsation of exhaust gases.

here's what mine looks like in DLL before and after the HKS 280's... I think if I would have started the 280 pull 500 rpm earlier they would line up quite nicely.

Jun 22, 2007 | 11:03 PM

#19

dmit

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From: las vegas

mellon what do you think of the 280e 272i set up

Jun 23, 2007 | 05:43 AM

#20

Mellon Racing

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From: Virginia Beach, Virginia

Quote:

Originally Posted by dmit

mellon what do you think of the 280e 272i set up

personally I'm not a fan of mixing cams but to each his own I guess.

Jun 24, 2007 | 06:33 AM

#21

TurboR

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Last edited by TurboR; Jun 24, 2007 at 06:36 AM. Reason: double post

Jun 24, 2007 | 06:34 AM

#22

TurboR

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From: Malaysia

Chris,

I own an Airtrek Turbo which uses a detuned evo 7 engine. If I wanted you to tune my car how/would it be possible? (I live on the other side of the world)

Tim

Jun 24, 2007 | 06:59 AM

#23

sparky

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From: Mesoamerica/ SF Bay Area

I think that if you want Mellon to tune your car and it has a Mitsu factory ECU, that you could probably have it done via Emails, using datlogging and ECUFlash. It would almost be like having him in your garage. Just click on the link in his signature.

Last edited by sparky; Jun 24, 2007 at 07:12 AM.