GM 847 Cam question

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Nov 12, 2004 | 12:39 PM

#16

The Cartel

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Joined: Feb 2004

Posts: 350

From: tulsa

Re: GM 847 Cam question

what's TEA? Do you have a website?

Nov 12, 2004 | 01:10 PM

#17

WinnipegGTA

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Posts: 26

Re: GM 847 Cam question

www.totalengineairflow.com

Nov 12, 2004 | 01:37 PM

#18

97bowtie

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Joined: Nov 2000

Posts: 1,148

From: AZ

Re: GM 847 Cam question

Quote:

Originally Posted by WinnipegGTA

LT1 Stage 2
Lift Intake Exhaust
.100 68.6 56.1
.200 139.6 118.8
.300 199.8 164.7
.400 240.9 198.5
.500 267.6 220.0
.550 269.9 229.4
.600 270.0 237.5

LOL, you're dreaming. Those exhaust numbers aren't even close. Even if the exhaust side was flown with a pipe, those are too high.

Nov 12, 2004 | 01:38 PM

#19

97bowtie

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Joined: Nov 2000

Posts: 1,148

From: AZ

Re: GM 847 Cam question

Quote:

Originally Posted by WinnipegGTA

I dont think a company like TEA would falsley advtise flowratings

It's not a matter of false advertising...I'm sure the heads "made" those exhaust flow numbers, but the method they used to get them and the calibration of the flowbench are questionable.

Nov 12, 2004 | 01:56 PM

#20

WinnipegGTA

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Posts: 26

Re: GM 847 Cam question

Why do you think its false advertising. They seem to have very similar numbers for stg 2 as LE does, just the exhuast see's the full CNC treatment as well.

Nov 12, 2004 | 02:04 PM

#21

Gripenfelter

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Joined: Jul 1999

Posts: 3,647

From: Winnipeg, Manitoba, Canada

Re: GM 847 Cam question

There is no way the exhaust flow is that high. Probably a typo on their site. Davenport Racing in Calgary carries TEA heads and the flow numbers they advertise are no where near that.

Email TEA.

Last edited by Gripenfelter; Nov 12, 2004 at 02:07 PM.

Nov 12, 2004 | 02:06 PM

#22

WS Sick

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Joined: Dec 2003

Posts: 2,724

From: Oklahoma where trees are made of wood.

Re: GM 847 Cam question

I've seen ported Track ones with less flow than that on the exhaust.

Nov 12, 2004 | 02:07 PM

#23

Camaro_Maniac63

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Joined: Apr 2003

Posts: 880

From: Land O Lakes, FL

Re: GM 847 Cam question

TEA flows their heads with a pipe for the exhaust, that is the reason for the higher numbers...

Nov 12, 2004 | 02:29 PM

#24

WinnipegGTA

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Posts: 26

Re: GM 847 Cam question

Ok so realistically what would they be like then?

Nov 12, 2004 | 02:35 PM

#25

Gripenfelter

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Joined: Jul 1999

Posts: 3,647

From: Winnipeg, Manitoba, Canada

Re: GM 847 Cam question

Looking at how they did on the intake side, I'd *guess* about 40-45 cfm lower on the exhaust side.

Last edited by Gripenfelter; Nov 12, 2004 at 02:39 PM.

Nov 12, 2004 | 02:51 PM

#26

The Cartel

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Joined: Feb 2004

Posts: 350

From: tulsa

Re: GM 847 Cam question

Quote:

Originally Posted by Z95m6

I thought i always heard you want at least .030 less lift than what your springs can take. I also think if you push the springs to their limits they have a very short life span. Not a good idea.

You got me thinkin. So I called Compcams for advice and they said that there is actually 60 thous. more in their springs. As I figured their underated. Probably for people like me, if says it's good to .600 that's what I'm pushin em to

Jason

Nov 12, 2004 | 03:00 PM

#27

WinnipegGTA

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Joined: Aug 2004

Posts: 26

Re: GM 847 Cam question

Just a compare to LE2 heads i made up. Again the TEA heads exhaust are off
LE2 vs TEA stg2

.2 136/102
.3 192/137
.4 238/164
.5 265/183
.6 271/188

.2 140/119
.3 200/165
.4 244/199
.5 268/220
.5 270/229 <---.550 lift
.6 270/238

Last edited by WinnipegGTA; Nov 12, 2004 at 03:05 PM.

Nov 12, 2004 | 05:54 PM

#28

12SCNDZ

Registered User

Joined: Mar 2002

Posts: 3,634

From: Newark, Delaware

Re: GM 847 Cam question

Yes, the 847 is made by Crane. Yes, the 847 is backordered indefinitely. I had my supplier check on the Crane with the same numbers, and it cost $85 more than the 847. Gee, for once something with a GM part number is CHEAPER than something aftermarket

. I've had my 847 ordered for 2 months now.

Frank

Nov 12, 2004 | 06:06 PM

#29

The Cartel

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Joined: Feb 2004

Posts: 350

From: tulsa

Re: GM 847 Cam question

Did they give you any time frame? Jason could'nt give me one. I can't handle 2 months.....

Nov 12, 2004 | 08:21 PM

#30

97Z-M6

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Joined: Mar 2002

Posts: 2,058

From: near waco tx.

Re: GM 847 Cam question

Quote:

Originally Posted by WinnipegGTA

Would this cam work well and compliment a set of Stage 2 TEA LT1 heads w/1.6rr's? Max lift on the cam would be .575/.595 with 1.6rr's. Its in those lift areas that the TEA heads have the best flowrates. I believe 270cfm intake and close to 240cfm exhaust. Thanx for any adivice. Cam info is below.

your low and mid lift numbers are where your power is made not a 600 lift.

but those numbers about 45 to 50 cfm off