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Author Topic: My GN needs a cam. Recommendations, manufacturers?  (Read 24637 times)

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Offline Spoolin'

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My GN needs a cam. Recommendations, manufacturers?
« on: January 06 2011, 05:58:22 PM »
What sounded like a sticky lifter turns out to be a flat lobe on the cam. My engine has about 6000 miles on it, and when it was built a Poston cam was installed. The cam I currently have I do not know the numbers on it, but it is two stages up from a stock grind. I don't mind it, but with my mods it doesn't really gain me anything either.

Here are my mods and what I am planning to add this spring. I'd like to get some input from the GN guru's here that have more experience with these turbo v6 cars since this is my first one.

Current Mods
-.030 rebuild
-cold air intake
-36# injectors
-ATR Pitbull chip
-Adjustable fuel psi regulator
-Fuel pump hotwire kit

Mods to come:
-Turbo Tweak chip
-3" Single Exhaust w/3" downpipe

As you can see, I have and what I'm going for is merely a bolt-on car. I want something that is quite driver friendly as I drive this car to work almost every nice day in the summer, heavily on the weekends, and to and from my girlfriend's house which is 40 miles away, so I don't want to take away any of the fuel economy either (I lose enough thru the gas pedal
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Offline SuperSix

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My GN needs a cam. Recommendations, manufacturers?
« Reply #1 on: January 06 2011, 06:04:24 PM »
Silly question, but why not a stock cam?

Gurus - are the stock cams worth a crap?
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Offline Top Speed

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My GN needs a cam. Recommendations, manufacturers?
« Reply #2 on: January 06 2011, 06:22:31 PM »
For your setup, I would not get too wild with cam selection.
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Champion Irons w/T&D roller rockers, TA-61 turbo, 206/206 Comp Cam,  57 lb/hr Siemens Injectors, 3000 stall PTC, PTE Plenum w/RJC Power Plate, 70 mm Accufab Throttle Body, RJC 325 Megacooler, TurboTweak 5.7/ Alky Control w/M1 methanol, 23 psig on the street, Puddn' Power engine, Borla Exhaust

Chris

Offline Spoolin'

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My GN needs a cam. Recommendations, manufacturers?
« Reply #3 on: January 06 2011, 07:15:12 PM »
Quote from: "SuperSix @ Thu Jan 06, 2011 5:04 pm"
Silly question, but why not a stock cam?

Gurus - are the stock cams worth a crap?


That's my question also. The way I see it, a stock cam would be fine for my setup.
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Offline Spoolin'

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My GN needs a cam. Recommendations, manufacturers?
« Reply #4 on: January 06 2011, 07:18:45 PM »
Quote from: "Top Speed @ Thu Jan 06, 2011 5:22 pm"
For your setup, I would not get too wild with cam selection.
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Offline Steve Wood

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My GN needs a cam. Recommendations, manufacturers?
« Reply #5 on: January 06 2011, 08:53:36 PM »
One step up, two steps up...I love it when you guys get technical!

this is my recommendation   http://www.fullthrottlespeed.com/itemdesc.asp+ic+001BU208CAM+eq++Tp+

remember you must get all the debris from the old cam out, or, you will be doing it again shortly
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Steve Wood

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A lot of broken parts does not make you a racer; it makes you a slow learner.

Offline Top Speed

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My GN needs a cam. Recommendations, manufacturers?
« Reply #6 on: January 06 2011, 09:11:03 PM »
we were waiting for a real gooroo to show up
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Champion Irons w/T&D roller rockers, TA-61 turbo, 206/206 Comp Cam,  57 lb/hr Siemens Injectors, 3000 stall PTC, PTE Plenum w/RJC Power Plate, 70 mm Accufab Throttle Body, RJC 325 Megacooler, TurboTweak 5.7/ Alky Control w/M1 methanol, 23 psig on the street, Puddn' Power engine, Borla Exhaust

Chris

Offline Spoolin'

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My GN needs a cam. Recommendations, manufacturers?
« Reply #7 on: January 06 2011, 10:38:43 PM »
Quote from: "Steve Wood @ Thu Jan 06, 2011 7:53 pm"
One step up, two steps up...I love it when you guys get technical!

this is my recommendation
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Offline ULYCYC

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My GN needs a cam. Recommendations, manufacturers?
« Reply #8 on: January 07 2011, 12:55:27 PM »
As Steve said also said make sure you clean out the block. That lobe material needs to be boiled out of the block. Also get a new oil cooler if you had one or remove it. Also try and figure out why it wiped after 6000 miles or it may happen again.
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Offline SuperSix

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My GN needs a cam. Recommendations, manufacturers?
« Reply #9 on: January 07 2011, 02:09:30 PM »
Quote from: "ULYCYC @ Fri Jan 07, 2011 12:55 pm"
As Steve said also said make sure you clean out the block. That lobe material needs to be boiled out of the block. Also get a new oil cooler if you had one or remove it. Also try and figure out why it wiped after 6000 miles or it may happen again.


This is why I keep my stock cam - way too many stories about wiped cam lobes with aftermarket. (Well, that, and I don't need anything more aggressive than stock)

Why is that?
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'87 GN, 60lb, TA49, THDP, FTP cam, T+ lots o' shit - SOLD
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Offline Steve Wood

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My GN needs a cam. Recommendations, manufacturers?
« Reply #10 on: January 07 2011, 02:25:41 PM »
99% of failed aftermarket cams appear to come from poor installation/break in techniques or sorry imported lifters that are not properly hardened.

The stock cam is matched very well to the stock turbo.
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Offline Spoolin'

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Re: My GN needs a cam. Recommendations, manufacturers?
« Reply #11 on: January 07 2011, 03:00:08 PM »
I checked a few other manufacturer's out, but this morning I placed an order the 208 cam, lifters, and pushrods from Full Throttle. Should have parts next week sometime.  :cool;

Its hard to say why that cam got wiped out so early, but as Steve said without a larger turbo and better flowing heads, a cam with more duration won't do any good. The guy doing the R&R for me owns probably the best independent shop around these parts, is a gearhead to the end, and the only guy I trust to work on my cars other than me. We have discussed cleansing the block, and he made the same mention as ULYCYC.

I can't wait to get it running right and install my new tranny.... Then let it sit for the rest of the winter  :rolleyes:

I will have a BRF core for sale in the near future if anyone is interested.


Again, thanks for all of your help fella's  :cool;
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Offline SuperSix

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My GN needs a cam. Recommendations, manufacturers?
« Reply #12 on: January 07 2011, 03:01:01 PM »
Maybe you can recommend good lifters to go with his cam purchase?

Thanks for clearing up why they wipe.
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'87 GN, 60lb, TA49, THDP, FTP cam, T+ lots o' shit - SOLD
'07 Ford F150 Lariat 2WD, 5.4L 3v - 255k
'20 Kubota BX2380. FEL, 60" deck
'78 IH/Case 184 Lo-Boy
'99 Kawasaki Bayou 400 4x4

Offline ULYCYC

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My GN needs a cam. Recommendations, manufacturers?
« Reply #13 on: January 07 2011, 03:05:54 PM »
If your heads and or block been machined the over the counter pushrods will be too long. Get a pushrod length checker to make sure. This may have also wiped out your first cam.
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Offline Steve Wood

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My GN needs a cam. Recommendations, manufacturers?
« Reply #14 on: January 07 2011, 03:23:06 PM »
Quote from: "SuperSix @ Fri Jan 07, 2011 2:01 pm"
Maybe you can recommend good lifters to go with his cam purchase?

Thanks for clearing up why they wipe.


altho expensive, I prefer GM lifters.  According to the mags there Johnson and someone else are once again making lifters in this country.

The original GM lifter had a stelite foot on it...hopefully they still do.

I think Earl had some information on such at one time
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Steve Wood

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A lot of broken parts does not make you a racer; it makes you a slow learner.
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