I have a built Engine, 280 cams, Want something smoother, same power

ki11switch · 03-31-2009, 07:21 PM

http://forums.nasioc.com/forums/show....php?t=1707229

my other thread ^^ post there

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Chi_San · 03-31-2009, 07:29 PM

Honestly, I'd suggest tossing the cams you have and finding something a little more mild. Stock cams probably aren't what you want, but what you have is certainly overkill for the output. Keep the built bottom end for sure, unless that drives you crazy too.

Why just swap the cams? Maybe the PO proted your heads, upgraded valvetrain, etc. Be a shame to just toss or sell that if you've already got it.

ki11switch · 03-31-2009, 07:32 PM

Quote:

Originally Posted by Chi_San

Honestly, I'd suggest tossing the cams you have and finding something a little more mild. Stock cams probably aren't what you want, but what you have is certainly overkill for the output. Keep the built bottom end for sure, unless that drives you crazy too.

Why just swap the cams? Maybe the PO proted your heads, upgraded valvetrain, etc. Be a shame to just toss or sell that if you've already got it.

I know i never thought i would want to get rid the cams it until i now have it. Im not complaining about it, just would prefer something smoother. I have the stock cams and valve springs and retainers i could swap back in. From what i have read, STI cams and 06 wrx cams are the same thing...

jays05 · 03-31-2009, 07:33 PM

Try another tuner?

ki11switch · 03-31-2009, 07:37 PM

Quote:

Originally Posted by jays05

Try another tuner?

well thats what i was thinking made it so rough but the guy who tuned it has a very high reputation... I have to get it retuned anyway, but i dont know if i am going to swap engines or not

joeschmoe714 · 03-31-2009, 08:36 PM

im pretty sure if you run a smaller cams itll be smoother.
im running an almost similar setup with 276's and you can hear and feel a slight lope but its not noisy or annoying.

mick_the_ginge · 03-31-2009, 09:15 PM

Quote:

I feel like my idle is really rough compared to any STI out there. Horrible cold start up etc.

I don't usually pick on the tuner but in this case I would say that the above statement is actually a sign that the tune is off a little. A cold start issue says to me that the fueling is off and this is backed up with the idle issue. I would almost bet that if you added fuel for cold start and idle you would have a smoother engine. Big cams don't like lean conditions, actually they don't like 14.7:1 which is the typical target AFR.

Add some fuel, 13.5:1 and I would bet that the engine would be happier. That's a nice looking built motor, save the other long block till you realy need it.

ki11switch · 03-31-2009, 09:49 PM

Quote:

Originally Posted by mick_the_ginge

I don't usually pick on the tuner but in this case I would say that the above statement is actually a sign that the tune is off a little. A cold start issue says to me that the fueling is off and this is backed up with the idle issue. I would almost bet that if you added fuel for cold start and idle you would have a smoother engine. Big cams don't like lean conditions, actually they don't like 14.7:1 which is the typical target AFR.

Add some fuel, 13.5:1 and I would bet that the engine would be happier. That's a nice looking built motor, save the other long block till you realy need it.

maybe ill give a re-tune a chance before i swap.....

mick_the_ginge · 03-31-2009, 11:23 PM

Of course you could have a plain and simple mechnical issue and nothing to do with tuning. Just thought I would mention that

reddevil · 03-31-2009, 11:36 PM

This car?

http://forums.nasioc.com/forums/show....php?t=1707229

mick_the_ginge · 03-31-2009, 11:49 PM

Ahah.... When you are ready to be tuned let me know and I'll try and be at Surgeline at the same time. I know Tim and the crew very well.

ki11switch · 03-31-2009, 11:55 PM

Quote:

Originally Posted by reddevil

This car?

http://forums.nasioc.com/forums/show....php?t=1707229

yep thats my car..

Chi_San · 04-01-2009, 12:53 AM

A friend got his EVO X tuned at Surgeline and it was an awesome experience, wished I could have been there.

Brydon · 04-01-2009, 03:00 AM

Try 264 cams and a re-tune. My motor with 272 cams started up and idled well in 12 degree weather. Coldest it gets here in portland. This was on a AEM standalone. So you should be able to get the same results with a good tune.

ki11switch · 04-01-2009, 03:08 AM

how are there so many people from portland on here?

jigga · 04-01-2009, 08:09 AM

Quote:

Originally Posted by ki11switch

how are there so many people from portland on here?

Not from Portland, but I found this comment funny

I would try switching to a less race-oriented set of cams, such as the 264's. u should be able to make similar power to what u make at the moment, with a wider powerband.

u can try going richer with the cams u have, and that will smooth them out a bit, but u will notice that ur fuel economy suffers, especially in the city, and u go through spark plugs a bit faster than usual due to the rich fuel mixture fowling them up.

CoolRex · 04-01-2009, 08:37 AM

Is there 93 octane in Oregon? Florida has 93 octane and if Oregon doesn't have 93 octane then your tune is way out of whack....

ki11switch · 04-01-2009, 02:15 PM

Quote:

Originally Posted by CoolRex

Is tehre 93 octane in Oregon? Florida has 93 octane and if Oregon doesn't have 93 octane tehn ur tune is way out of whack....

92 oct

CoolRex · 04-01-2009, 02:17 PM

That 'could' be your problem. You best bet in your area is to contact Surgeline Tuning. Or call Topspeed and they can remote tune your car on any dyno if the dyno owner will help them set it up

ki11switch · 04-01-2009, 02:20 PM

Quote:

Originally Posted by CoolRex

That 'could' be your problem. You best bet in your area is to contact Surgeline Tuning. Or call Topspeed and they can remote tune your car on any dyno if the dyno owner will help them set it up

my plans are to get it tuned my tim at surgeline

irascible · 04-01-2009, 02:37 PM

Quote:

Originally Posted by ki11switch

my plans are to get it tuned my tim at surgeline

I'd say that's a good start, and he could probably tell you what to check on if the problem still exists.

It may also be caused by crappy modded injectors, or problematic ones.

ki11switch · 04-01-2009, 03:02 PM

Quote:

Originally Posted by irascible

I'd say that's a good start, and he could probably tell you what to check on if the problem still exists.

It may also be caused by crappy modded injectors, or problematic ones.

i dont have modded injectors......

kellygnsd · 04-01-2009, 03:56 PM

I wouldn't expect 280 cams to idle like a stock DD. You sacrifice a little to get that top end so swapping them out for the stockers won't net you the same power without a bigger turbo.

TopEndPull · 04-01-2009, 04:25 PM

I would keep it the way it is now and get a retune to see how that goes. You've got a built motor with the works so why not use it? I would save the sti long block for down the road...

john 1badSTI · 04-01-2009, 08:53 PM

+1 for what mick said the car probably needs retuned just like he said big cams like to idle around 1000 rpm and af's around 13.5-13.8.

03-31-2009, 07:21 PM	#1
ki11switch Scooby Specialist Member#: 176422 Join Date: Apr 2008 Chapter/Region: NWIC	I have a built Engine, 280 cams, Want something smoother, same power http://forums.nasioc.com/forums/show....php?t=1707229 my other thread ^^ post there * Registered users of the site do not see these ads. Last edited by ki11switch; 04-07-2009 at 01:48 AM. Reason: different thread

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03-31-2009, 07:29 PM	#2
Chi_San Scooby Guru Member#: 53558 Join Date: Jan 2004 Chapter/Region: NWIC Location: Deadford, OR Vehicle: 2002 WRX Wagon Silver	Honestly, I'd suggest tossing the cams you have and finding something a little more mild. Stock cams probably aren't what you want, but what you have is certainly overkill for the output. Keep the built bottom end for sure, unless that drives you crazy too. Why just swap the cams? Maybe the PO proted your heads, upgraded valvetrain, etc. Be a shame to just toss or sell that if you've already got it.

03-31-2009, 07:33 PM	#4
jays05 Scooby Specialist Member#: 78165 Join Date: Dec 2004 Chapter/Region: South East Location: SC Vehicle: 05 STI 35r + e85	Try another tuner?

03-31-2009, 08:36 PM	#6
joeschmoe714 Scooby Newbie Member#: 71374 Join Date: Sep 2004 Chapter/Region: SCIC Location: orange county, ca Vehicle: 2005 impreza wrx aspen white	im pretty sure if you run a smaller cams itll be smoother. im running an almost similar setup with 276's and you can hear and feel a slight lope but its not noisy or annoying.

03-31-2009, 11:23 PM	#9
mick_the_ginge Citizen Mick Member#: 27646 Join Date: Oct 2002 Chapter/Region: NWIC Location: Portland, Oregon Vehicle: 2003 Sleeved 2.5 Oil Dry Sump Goodness	Of course you could have a plain and simple mechnical issue and nothing to do with tuning. Just thought I would mention that

03-31-2009, 11:36 PM	#10
reddevil Scooby Guru Member#: 64673 Join Date: Jun 2004 Chapter/Region: NWIC Location: portland Vehicle: 1990 Legacy wagon goes 12.387 @ 116.5	This car? http://forums.nasioc.com/forums/show....php?t=1707229

03-31-2009, 11:49 PM	#11
mick_the_ginge Citizen Mick Member#: 27646 Join Date: Oct 2002 Chapter/Region: NWIC Location: Portland, Oregon Vehicle: 2003 Sleeved 2.5 Oil Dry Sump Goodness	Ahah.... When you are ready to be tuned let me know and I'll try and be at Surgeline at the same time. I know Tim and the crew very well.

04-01-2009, 12:53 AM	#13
Chi_San Scooby Guru Member#: 53558 Join Date: Jan 2004 Chapter/Region: NWIC Location: Deadford, OR Vehicle: 2002 WRX Wagon Silver	A friend got his EVO X tuned at Surgeline and it was an awesome experience, wished I could have been there.

04-01-2009, 03:00 AM	#14
Brydon Scooby Specialist Member#: 107569 Join Date: Feb 2006 Chapter/Region: NWIC Location: Portland, OR Vehicle: 1998 Forester S SRP	Try 264 cams and a re-tune. My motor with 272 cams started up and idled well in 12 degree weather. Coldest it gets here in portland. This was on a AEM standalone. So you should be able to get the same results with a good tune.

04-01-2009, 03:08 AM	#15
ki11switch Scooby Specialist Member#: 176422 Join Date: Apr 2008 Chapter/Region: NWIC	how are there so many people from portland on here?

04-01-2009, 08:37 AM	#17
CoolRex * Banned * Member#: 85813 Join Date: Apr 2005 Chapter/Region: South East Location: Myrtle Beach, SC Vehicle: 2002 E46 M3 2006 RC51	Is there 93 octane in Oregon? Florida has 93 octane and if Oregon doesn't have 93 octane then your tune is way out of whack....

04-01-2009, 02:17 PM	#19
CoolRex * Banned * Member#: 85813 Join Date: Apr 2005 Chapter/Region: South East Location: Myrtle Beach, SC Vehicle: 2002 E46 M3 2006 RC51	That 'could' be your problem. You best bet in your area is to contact Surgeline Tuning. Or call Topspeed and they can remote tune your car on any dyno if the dyno owner will help them set it up

04-01-2009, 03:56 PM	#23
kellygnsd Scooby Guru Member#: 32669 Join Date: Feb 2003 Chapter/Region: SCIC Location: Rancho C Vehicle: 2007 FR TS EFR 7670 LINK G4 hybrid STi	I wouldn't expect 280 cams to idle like a stock DD. You sacrifice a little to get that top end so swapping them out for the stockers won't net you the same power without a bigger turbo.

04-01-2009, 04:25 PM	#24
TopEndPull Scooby Specialist Member#: 126112 Join Date: Sep 2006 Chapter/Region: TXIC Location: Houston,Texas Vehicle: 93.5 Toyota Supra Red	I would keep it the way it is now and get a retune to see how that goes. You've got a built motor with the works so why not use it? I would save the sti long block for down the road...

04-01-2009, 08:53 PM	#25
john 1badSTI Scooby Specialist Member#: 77470 Join Date: Dec 2004 Chapter/Region: MWSOC Location: grove city ohio Vehicle: 04 sti 10.51@138.5 on e85@ 30psi--spinning	+1 for what mick said the car probably needs retuned just like he said big cams like to idle around 1000 rpm and af's around 13.5-13.8.