C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Zz-x Cam From Tpis

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Old Jan 25, 2007 | 10:24 PM
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Default Zz-x Cam From Tpis

IM LOOKING AT THE T.P.I.S. 2003 catalog and couldnt help but notice that with a ZZ-X cam a 99% bone stock L-98 makes 408.2 HP.. TPIS says.. does anyone have any experience with this cam here? is T.P.I.S. full of B.S. because if not i will learn how to install a cam in record fast time! any help would be appreciated guys! pg 20 2003 catalog
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Old Jan 25, 2007 | 10:27 PM
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I have no idea what the specs are but Ill call on that. NO CAM by itself will give you 150 hp.
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Old Jan 25, 2007 | 10:28 PM
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it does sound crazy...
advertised duration: 290
Duration@ .50 239
Gross lift: .558
Lobe separation: 112

Last edited by arkangel81; Jan 25, 2007 at 10:30 PM.
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Old Jan 25, 2007 | 11:04 PM
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Originally Posted by arkangel81
IM LOOKING AT THE T.P.I.S. 2003 catalog and couldnt help but notice that with a ZZ-X cam a 99% bone stock L-98 makes 408.2 HP.
No Way!!! Also, that camshaft is a mismatch for your stock TPI.
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Old Jan 25, 2007 | 11:15 PM
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Not with a stock TPI intake it doesnt.
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Old Jan 25, 2007 | 11:16 PM
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Originally Posted by arkangel81
IM LOOKING AT THE T.P.I.S. 2003 catalog and couldnt help but notice that with a ZZ-X cam a 99% bone stock L-98 makes 408.2 HP.. TPIS says.. does anyone have any experience with this cam here? is T.P.I.S. full of B.S. because if not i will learn how to install a cam in record fast time! any help would be appreciated guys! pg 20 2003 catalog


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Old Jan 25, 2007 | 11:32 PM
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You sure thay are not talking about that cam with ported heads, FL headers and a MR...

You can expect from a cam alone around 30chp.
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Old Jan 25, 2007 | 11:40 PM
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so it is possible to replace just the cam without changing springs / rockers / heads ..... ? 30chp sounds like a decent mod for something thats a few hundred bucks.
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Old Jan 25, 2007 | 11:44 PM
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Originally Posted by bill83c4
so it is possible to replace just the cam without changing springs / rockers / heads ..... ? 30chp sounds like a decent mod for something thats a few hundred bucks.
Nope.
That cam will likely need 125 pounds on the seat and 320 or so open pressures. Stock won't cut it.
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Old Jan 25, 2007 | 11:50 PM
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didn't think so. I'll stick to getting headers as the next mod
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Old Jan 25, 2007 | 11:51 PM
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Originally Posted by bill83c4
so it is possible to replace just the cam without changing springs / rockers / heads ..... ? 30chp sounds like a decent mod for something thats a few hundred bucks.
Few hundred bucks price, hundredz on labor and/or alot of time.

But no, you cant even think of using that cam with stock springs.

Not to mention that this cam is a complete waste once you put a TPI intake on it.
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Old Jan 26, 2007 | 12:54 AM
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I think it's possible.












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Old Jan 26, 2007 | 08:16 AM
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TPIS states nothing about using or being a stock L98 (or"99% stock" as you put it) in their dyno tests(page 20, 2003 catalog). What they do state is:

"Would you believe 408hp , 451ft/lb.350 with a factory tuned port a stockTB and only a T.P.I.S. Airfoil- and it pulls to 6300rpm." Further down and to the side of the dyno chart/numbers it states: "Test 2 same L98 with a ported base, stock runners, and 48mm T.B. with a TPIS Airfoil." Included above is this statement:"Test 1 is an L98 350 with mini and a 52mm TB."

The ZZX is a 239/239@50 duration cam with 558 lift, 112 lsa. that is a reasonably big cam that they mnentioned designing for their corvette to run in the Mid-America Corvette Challange Series. As stated above would require heads/ headwork, ehaust etc. etc. If you read the next page it states when using the ZZ9 stock l98 v.springs will need to be changed, and that cam isn't nearly as big as the ZZX.
This is where carefull reading is required, as to not misinterpet the article or their results.

Last edited by mseven; Jan 26, 2007 at 08:47 AM.
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Old Jan 26, 2007 | 02:53 PM
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somtimes it seems like you need to get a lawyer to interpret some of that stuff
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Old Jan 26, 2007 | 03:17 PM
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Originally Posted by arkangel81
somtimes it seems like you need to get a lawyer to interpret some of that stuff
Just take all ad claims with a grain of salt. If it doesn't make sense, it isn't true.
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Old Jan 26, 2007 | 04:14 PM
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Originally Posted by BADDUCK
Just take all ad claims with a grain of salt. If it doesn't make sense, it isn't true.
i have desktop dyno open right now...

how much does the STOCK TPI system flow, and what are the full cam specs...i'll give you a good ballpark...this is a hydraulic roller correct?
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Old Jan 26, 2007 | 04:27 PM
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assuming the TPI flows around the same or better as the stock crossfire setup...with NOTHING DIFFERENT but the addition of the ZZ-X cam Desktop Dyno calls for 300 hp and 350ft/lbs

add long tubes, mini-ram...looking at 400hp and 413ft/lbs

EDIT: these figures drawn at 9.5 to 1 compression - stock 350 - using L98 real head flow numbers and maually inputting the cam specs...
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Old Jan 26, 2007 | 04:42 PM
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Those figures sound more realistic
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Old Jan 26, 2007 | 10:28 PM
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Originally Posted by Fubar569
assuming the TPI flows around the same or better as the stock crossfire setup...with NOTHING DIFFERENT but the addition of the ZZ-X cam Desktop Dyno calls for 300 hp and 350ft/lbs

add long tubes, mini-ram...looking at 400hp and 413ft/lbs

EDIT: these figures drawn at 9.5 to 1 compression - stock 350 - using L98 real head flow numbers and maually inputting the cam specs...
Good luck on making a set of stock 113 or 128 heads flow 400 hp. Lift from the cam means nothing with those heads past .450 so you might as well make whatever cam hold the valve open for 260 degrees at .050.

Seriously, good luck.
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Old Jan 26, 2007 | 10:45 PM
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Originally Posted by hippy
Good luck on making a set of stock 113 or 128 heads flow 400 hp. Lift from the cam means nothing with those heads past .450 so you might as well make whatever cam hold the valve open for 260 degrees at .050.

Seriously, good luck.
okay then...someone send me a set of untouched 113's and i'll prove you wrong

Last edited by Fubar569; Jan 26, 2007 at 10:47 PM.
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