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TheTurboForums  |  General Tech Sections  |  TURBO TECH QUESTIONS ONLY!!!  |  Topic: Lumpy Sounding Turbo Cam?? « previous next »
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badassmav
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Lumpy Sounding Turbo Cam??
« on: January 13, 2008, 10:00:07 PM »

Is there such a thing, I miss my lumpy idle that would scare off punk kids. I want a cam that sounds good and still work good with boost, am I asking for the impossible. Right now mine specs out at: .226 @.050 .512 lift and 114l/s & l/c.
My n/a cam is .270 @.050 and .600 with a 104 center and 106 l/s and it's gnarly sounding.
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Re: Lumpy Sounding Turbo Cam??
« Reply #1 on: January 14, 2008, 12:53:12 AM »

Jesse its the tight LS that gives it the sound you are looking for, not so much for a turbo application.
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Re: Lumpy Sounding Turbo Cam??
« Reply #2 on: January 14, 2008, 05:01:26 AM »

Is there such a thing, I miss my lumpy idle that would scare off punk kids. I want a cam that sounds good and still work good with boost, am I asking for the impossible. Right now mine specs out at: .226 @.050 .512 lift and 114l/s & l/c.
My n/a cam is .270 @.050 and .600 with a 104 center and 106 l/s and it's gnarly sounding.

Is that the f303? 

Mine still has a bit of the bumpity bumpity sound even with the turbo's.  I can tune it so it sounds more or less aggressive via. timing and fuel adjustments…but for now, this is how it sounds.  http://videos.streetfire.net/video/3f193ee2-3089-440b-b132-99ea0150d4a0.htm
« Last Edit: January 15, 2008, 01:04:12 PM by Millhouse » Logged

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Gen1SVE
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Re: Lumpy Sounding Turbo Cam??
« Reply #3 on: January 14, 2008, 06:54:04 AM »

There are plenty of cams that will work great with a turbo and are lumpy.  E,F-303.  Also many of the custom hyd-roller turbo cams will be lumpy.  My turbopeople hyd-roller is very lumpy.  I'll try to get a vid of it at idle with the new 4.5" borla this weekend. 
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Re: Lumpy Sounding Turbo Cam??
« Reply #4 on: January 14, 2008, 08:29:03 AM »

How big a motor is it?  You've gone from 270º to 226º ?!?!?  just with the addition of a turbocharger?!?  Something's not right.
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Re: Lumpy Sounding Turbo Cam??
« Reply #5 on: January 14, 2008, 12:58:06 PM »

lumpy is kinda hard with those pesky castiron turbine housings bolted on the exhaust, there is very little you can do
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Re: Lumpy Sounding Turbo Cam??
« Reply #6 on: January 14, 2008, 01:57:20 PM »

When I pull my 95 turbo lightning into the inspections lanes of Del-Dot, they all laugh and say there is no way that thing is going to pass (it is that lumpy).  A few key strokes and it will pass the sniffer then they try to fail me because of noise.  Last time I had an on looker watching me tune as they started the sniff test.  She said"Hey he has a labtop in there"  They have no idea how to take it.  As far as the noise test, once I tell then that there are no tunnels in DE (in wilmington the do the sound test indoors) they will test it outside where it passes by 2 db's.  But by the time I get outside I have returned the tune to stinky and the tester will ask and this thing passed emissions?  Another note the larger the turbine wheel/housing the louder and more defined the idle will be.   
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Re: Lumpy Sounding Turbo Cam??
« Reply #7 on: January 14, 2008, 07:07:46 PM »

Another note the larger the turbine wheel/housing the louder and more defined the idle will be.   

I agree with that one. My truck sounds completely N/A when idling and driving around. I have the N/A cam that no one reccomends and I may be givin up HP but damn it sounds good. It had a decent amount of lumpy 10-12" vac at 900 RPM. I am temped to change the cam to see if I pickup hp but I do enjoy the way it sounds. I can't put the power I have to the ground on the street anyways...

Oh, specs on the cam is 228@.050" and .501" flat tappet cam.
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Curtis
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badassmav
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Re: Lumpy Sounding Turbo Cam??
« Reply #8 on: January 14, 2008, 08:02:35 PM »

The 270 @ .050 is in my 351w nos motor, and it just rocks, 3-4 inches of vac. in park , non in gear, But the cam I had ground off of an f-cam, is .226 @ .050 and 114l/s and l/c. My question is even though I'd be losing alot out the exaust, could I run a  240-250? @ .050 with a 106-108 l/c l/s and still run like a banshee, my guess is it would come on boost later or higher in the rpms?? As SNYPER knows I'll put up with alot in a vehicle as far as driveability goes, maybe I'll get another cam ground  and if I'm not 100% with it I'll just spray the bitch too!!
Thanks guys
My ex. housing is 1.05a/r with a 3.5" outlet, shouldn't be to restrictive on a 302.
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Re: Lumpy Sounding Turbo Cam??
« Reply #9 on: January 15, 2008, 06:49:47 AM »

here is my cobra with e-303 and 1.71 roller rockers.  I think it sounds pretty choppy

http://media.putfile.com/93-Cobra-with-Built-306-and-turbo
« Last Edit: January 15, 2008, 06:53:49 AM by Cobra93 » Logged
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Re: Lumpy Sounding Turbo Cam??
« Reply #10 on: January 15, 2008, 06:52:15 AM »

Sorry coppied itself
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Re: Lumpy Sounding Turbo Cam??
« Reply #11 on: January 15, 2008, 07:06:32 AM »

here is my cobra with e-303 and 1.71 roller rockers.  I think it sounds pretty choppy

http://media.putfile.com/93-Cobra-with-Built-306-and-turbo


Your car sounds great!!! Can you give us a rundown off your combo?
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Re: Lumpy Sounding Turbo Cam??
« Reply #12 on: January 15, 2008, 07:12:01 AM »

sure its a 93 cobra with a built motor.  Dart block bored .030 to match my old rotating assembly.  Now 306 with scat crank, eagle rods, srp dish pistons.  Car has 4 bolt main girdle and a 7 qt oil pan.  As far as the top of the motor goes it has afr 185 heads that have been ported, a gt-40 lower intake agressively ported to match the new heads with their porting, and a downs ford upper intake on top of that.  Car has an e-303 camshaft with 1.71 roller rockers, and I forget the valve size and spring constant, but both are after market.  The turbo kit is a PTK 76 gts kit, but I didn't buy the gts turbo while I was on my stock block.  Currently on a mp t-70, but will be upgrading soon.  car has a 3 inch y-pipe that splits off into 2 2.5 that matches up to a custom cat back with slp lm1 resonators.  Anything else you wanna know you just let me know.
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Re: Lumpy Sounding Turbo Cam??
« Reply #13 on: January 15, 2008, 07:18:20 AM »

HHHMMMMM I need some action vids  Two Thumbs Up!
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Re: Lumpy Sounding Turbo Cam??
« Reply #14 on: January 15, 2008, 07:28:32 AM »

me too..  The only one I have is too embarrassing to show any of you.   Its me having fun destroying second gear in a neighborhood, than getting my accelerator stuck under a floor mat and bouncing off rev limiter pretty violently for about 2 seconds, and blowing a header gasket.  Seems like I cant ever get people to ride in my car and shoot vids for me.  None of em have any issues driving my car though... Wonder what that means  Doh!.
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Re: Lumpy Sounding Turbo Cam??
« Reply #15 on: January 15, 2008, 08:40:08 AM »

Quote from: badassmav
My question is even though I'd be losing alot out the exaust, could I run a  240-250? @ .050 with a 106-108 l/c l/s and still run like a banshee, my guess is it would come on boost later or higher in the rpms?? As SNYPER knows I'll put up with alot in a vehicle as far as driveability goes, maybe I'll get another cam ground  and if I'm not 100% with it I'll just spray the bitch too!!
Thanks guys
My ex. housing is 1.05a/r with a 3.5" outlet, shouldn't be to restrictive on a 302.

I don't think you need (or will like) a 240-250º cam in that 302.  Do something around 230-236.  And go ahead and put it on a 112-113º LSA.  Advance it to about 108-109º.  It will do nicely and will make plenty of sound.
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Re: Lumpy Sounding Turbo Cam??
« Reply #16 on: January 15, 2008, 01:43:07 PM »

I run 234/234 @ .050 535/535 114deg lobe sep, idles with a nice rump and will spin out past 6800 still making good power, is a flat solid. Grin
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Re: Lumpy Sounding Turbo Cam??
« Reply #17 on: January 16, 2008, 09:48:29 AM »

Here is a video of my car. Has the Anderson Ford Motorsports B451 blower/tubro camshaft.


Big thanks to Dwayne Big Daddy Gutridge for taking my car in late on a saturday and spending countless hours on my car! Aslo thanks to my good buddy Brian Applegate from Downs Ford.
« Last Edit: January 17, 2008, 04:06:26 PM by crapr6 » Logged
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Re: Lumpy Sounding Turbo Cam??
« Reply #18 on: January 16, 2008, 12:32:09 PM »

Blower AND turbo camshaft all in one, huh...

Hmm.
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Re: Lumpy Sounding Turbo Cam??
« Reply #19 on: January 16, 2008, 02:37:08 PM »

Blower AND turbo camshaft all in one, huh...

Hmm.

My bad its a N2o or SC camshaft. I called Rick when building the motor and he said this is the cam to run. Iam pulling the motor soon due to a small oil leak coming from the head, so iam really thinking about doing a solid roller camshaft now.
« Last Edit: January 16, 2008, 09:37:24 PM by crapr6 » Logged
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Re: Lumpy Sounding Turbo Cam??
« Reply #20 on: January 16, 2008, 03:05:38 PM »

I run a 231/240 @ .050" on 114 centres mech flat tappet in my 383 - it's got a fair ol lope to it but you couldn't call it lumpy.

By the time you stick in a cam big enough to get a lumpy idle & still be suitable for turbo you'll have a fairly peaky/laggy engine that only goes hard with big revs on board - even my cam makes grunt to 7000rpm, bigger & you'll really have to wring it's neck.

To hell with lumpiness - I'd rather have a combo that works well, goes hard & doesn't attract too much attention.
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Re: Lumpy Sounding Turbo Cam??
« Reply #21 on: January 17, 2008, 03:44:55 AM »

Is there such a thing, I miss my lumpy idle that would scare off punk kids. I want a cam that sounds good and still work good with boost, am I asking for the impossible. Right now mine specs out at: .226 @.050 .512 lift and 114l/s & l/c.
My n/a cam is .270 @.050 and .600 with a 104 center and 106 l/s and it's gnarly sounding.

You guys are trying to hard.
Just add a vacuum leak to the motor.  Use a air idle solenoid.
Open it with a switch at idle.  The vacuum leak it creates will give you the lumpy rolling idle.  Doh!
Of course put it on a mon/off switch so you can't leave it on.
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Re: Lumpy Sounding Turbo Cam??
« Reply #22 on: January 17, 2008, 05:25:37 AM »

 Haha Do you guys know where I can find the loudest most retarded sounding blow-off?
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Re: Lumpy Sounding Turbo Cam??
« Reply #23 on: January 17, 2008, 06:31:55 AM »

 Wooo! Haha
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Re: Lumpy Sounding Turbo Cam??
« Reply #24 on: January 17, 2008, 06:49:24 AM »

 Wooo!
« Last Edit: January 17, 2008, 06:55:21 AM by vader_turbo » Logged

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