GM Prototype GTO Engine Specs

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Aug 27, 2004 | 02:25 PM

jmarsa

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GM Prototype GTO Engine Specs

Anybody see these?

http://www.cheersandgears.com/forums...showtopic=5316

Specs as posted there as well:

All engine parts are from the Gen IV small block family
Engine Displacement: 6.4L (389 CID)
Bore: 105.03mm (4.135”)
Stroke: 92.00mm (3.622”)
REV Limit: 7000 RPM
Peak Hp: 575 Hp @ 6800 RPM
Peak Tq: 500 Lb-Ft @ 5200 RPM
Compression Ratio: 10.5:1
Cam Shaft: Custom GM Hyd Roller
Valve lift: 15.75mm (.620”)
Cam Duration Int: 232 deg @ .050” Tappet
Cam Duration Exh: 272 deg @ .050” Tappet
90mm Throttle Body
Dual Mass Air Flow sensors, Cold air induction system

If you read the whole thread you see other links for additional pics.

--JMarsa

Last edited by jmarsa; Aug 27, 2004 at 11:06 PM.

Aug 27, 2004 | 02:49 PM

BigPlanTransAm

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From: Jersey boy

bad link?

Aug 27, 2004 | 02:51 PM

granitemonkey

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the engine specs sound good, anybody know if the throttle body will be cable driven or drive by wire?

Aug 27, 2004 | 03:34 PM

InsomZ

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wow.. sounds like the same 6.4 that is meant for the LS7 c6 z06!??!

Aug 27, 2004 | 03:50 PM

Another_User

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I don't know about those cam specs. That duration seems a little high @.050.

Aug 27, 2004 | 04:05 PM

grooves12

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http://www.cheersandgears.com/forums...showtopic=5316

Aug 27, 2004 | 05:15 PM

Another_User

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Mmmm....I like that much better than the real GTO. The real GTO is crap. I just want the intake.

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Aug 27, 2004 | 05:48 PM

Pro Stock John

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I thought it said gears and queers at first.

Aug 27, 2004 | 11:03 PM

#10

jmarsa

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link works?

Fixed the link sorry.

--JMarsa

Aug 27, 2004 | 11:08 PM

#11

horist

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sounds nice... but doubt it'll happen anytime soon.. can't get too close to corvette territory....

Aug 28, 2004 | 12:24 AM

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GoldenVelvet

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That intake would work great with my hood, Anyone else see the two MAFs.

Aug 28, 2004 | 09:21 AM

#13

Another_User

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Quote:

Originally Posted by GoldenVelvet

That intake would work great with my hood, Anyone else see the two MAFs.

I was thinking about recommending that to a vendor...but whenever I say something everybody thinks I am stupid because I have a hotcam...

Anyways, you can't make a MAF too big, or it won't read poop. Plus the cool part is you could use two MAFs for error correction on each other. Much more efficient.

Aug 28, 2004 | 10:17 AM

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GMCtrk

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Quote:

Originally Posted by horist

sounds nice... but doubt it'll happen anytime soon.. can't get too close to corvette territory....

Aug 28, 2004 | 08:00 PM

#15

distortion_69

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Cam Duration Int: 232 deg @ .050” Tappet
Cam Duration Exh: 272 deg @ .050” Tappet

^-- Exhaust doesn't look right for .050"! Other than that, sounds like a sweet power plant.

Josh

Aug 28, 2004 | 08:30 PM

#16

ShadowLightCSU

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Looks like things are moving in the right direction

Aug 28, 2004 | 09:47 PM

#17

Fahad

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Guys.. i am not understand that specs for? that's very different than LS2 engine stander, what do you mean GM Prototype?

What about the transmission of this car?

Thanks

Aug 29, 2004 | 01:32 PM

#18

narcszm

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Quote:

Originally Posted by Fahad

Guys.. i am not understand that specs for? that's very different than LS2 engine stander, what do you mean GM Prototype?

What about the transmission of this car?

Thanks

Sahla, Aini! It's not an LS2 - it's a modified LS2, likely close to the displacement of the LS7 / whatever they call the new hopped-up LS2.

Aug 31, 2004 | 09:40 AM

#19

J-Rod

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From: Texas

Here are some pics of the new concept GTO. I would like to point out that this intake appears to be a production plastic intake, but it does not appear to be an LS2 intake.