Hard Data ....
Thread Starter
Instructor
Joined: Nov 2001
Posts: 145
Likes: 38
From: Upper Marlboro MD
Hard Data ....
Development of the Combustion System for the
General Motors Fifth Generation “Small Block”
Engine Family 2013-01-1732 Published
04/08/2013
Figure 55 in paper ... About 35 HP peak gain, very wide power band up to 7200 rpm, just by eyeball about 45 hp average gain under curve..over LS3
http://papers.sae.org/2013-01-1732/
Cheers
General Motors Fifth Generation “Small Block”
Engine Family 2013-01-1732 Published
04/08/2013
Figure 55 in paper ... About 35 HP peak gain, very wide power band up to 7200 rpm, just by eyeball about 45 hp average gain under curve..over LS3
http://papers.sae.org/2013-01-1732/
Cheers
Team Owner
Joined: Sep 1999
Posts: 41,732
Likes: 1,718
From: Springfield MO
Development of the Combustion System for the
General Motors Fifth Generation “Small Block”
Engine Family 2013-01-1732 Published
04/08/2013
Figure 55 in paper ... About 35 HP peak gain, very wide power band up to 7200 rpm, just by eyeball about 45 hp average gain under curve..over LS3
http://papers.sae.org/2013-01-1732/
Cheers
General Motors Fifth Generation “Small Block”
Engine Family 2013-01-1732 Published
04/08/2013
Figure 55 in paper ... About 35 HP peak gain, very wide power band up to 7200 rpm, just by eyeball about 45 hp average gain under curve..over LS3
http://papers.sae.org/2013-01-1732/
Cheers
GM's own dyno graph that they showed the world when they released the info on the Lt1 last year, shows 450 HP which is 20 above the LS3, not 45 HP.
Thread Starter
Instructor
Joined: Nov 2001
Posts: 145
Likes: 38
From: Upper Marlboro MD
You have to download the SAE paper in pdf form ( at about 24 $ ) look at figure 55 in paper. It show that the LT1 has a peak power of about 26 KW ( 35 HP ) more than the LS3,..etc Paper will be presented next week at SAE World Congress.
Melting Slicks
Joined: Aug 2005
Posts: 2,874
Likes: 614
Not surprising at all. Don't know why so many are stuck on 450hp given the specs GM has provided so far.
*Higher compression
*Direct injection
*Smarter ECM
*Higher flowing IM
*Better intake/exhaust mainfolds
*Larger exhaust(at least on Z51 models)
*VVT for broader powerband
*Redesigned heads(which I seriously doubt flow less than the LS3 head)
It adds up.
470hp is a pretty good number for a base Vette IMO.
People on here were exaggerating acting like AFM was a death sentence.
*Higher compression
*Direct injection
*Smarter ECM
*Higher flowing IM
*Better intake/exhaust mainfolds
*Larger exhaust(at least on Z51 models)
*VVT for broader powerband
*Redesigned heads(which I seriously doubt flow less than the LS3 head)
It adds up.
470hp is a pretty good number for a base Vette IMO.
People on here were exaggerating acting like AFM was a death sentence.
Last edited by Kappa; Apr 9, 2013 at 04:47 PM.
Melting Slicks
Joined: Nov 2009
Posts: 3,425
Likes: 14
Thanks for the info texel, keep us posted with other interesting information.
Are you allowed to screenshot the dyno plot and host it? Would be interesting to see.
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Team Owner
Joined: Sep 1999
Posts: 41,732
Likes: 1,718
From: Springfield MO
I read 'under the curve' as in earlier in the powerband, which is expected given what we've seen on GM's dyno plot and increased torque ratings.
Thanks for the info texel, keep us posted with other interesting information.
Are you allowed to screenshot the dyno plot and host it? Would be interesting to see.
Thanks for the info texel, keep us posted with other interesting information.
Are you allowed to screenshot the dyno plot and host it? Would be interesting to see.
Melting Slicks
Joined: Jun 2005
Posts: 2,216
Likes: 1
St. Jude Donor '12-'13-'14, '16
Development of the Combustion System for the
General Motors Fifth Generation “Small Block”
Engine Family 2013-01-1732 Published
04/08/2013
Figure 55 in paper ... About 35 HP peak gain, very wide power band up to 7200 rpm, just by eyeball about 45 hp average gain under curve..over LS3
http://papers.sae.org/2013-01-1732/
Cheers
General Motors Fifth Generation “Small Block”
Engine Family 2013-01-1732 Published
04/08/2013
Figure 55 in paper ... About 35 HP peak gain, very wide power band up to 7200 rpm, just by eyeball about 45 hp average gain under curve..over LS3
http://papers.sae.org/2013-01-1732/
Cheers
Team Owner
Joined: Sep 1999
Posts: 41,732
Likes: 1,718
From: Springfield MO
Team Owner
Joined: Sep 1999
Posts: 41,732
Likes: 1,718
From: Springfield MO
As you can see from the GM graph I posted, the LT's torque drops off faster than the LS3's as the LT1 is designed as a low RPM torquer, not a high RPM horsepower monster.
Engines are like tires/suspension. While the Corvette can be designed to pull 1g on a skidpad(re: Z51), GM designed the base Corvette to pull around .92. I used C6 figures as no official GM skidpad numbers have been released for the C7. But you get my point.
Last edited by JoesC5; Apr 9, 2013 at 05:07 PM.
Team Owner
Joined: Sep 1999
Posts: 41,732
Likes: 1,718
From: Springfield MO
Do you have anything from GM that says different?
Last edited by JoesC5; Apr 9, 2013 at 05:12 PM.
Thread Starter
Instructor
Joined: Nov 2001
Posts: 145
Likes: 38
From: Upper Marlboro MD
Paper is DRM'ed had to give them my address and CC info for purchase...
THIS DOCUMENT IS PROTECTED BY U.S. AND INTERNATIONAL COPYRIGHT.
It may not be reproduced, stored in a retrieval system, distributed or transmitted, in whole or in part, in any form or by any means.
Downloaded from SAE International by Gary xxxx, Tuesday, April 09, 2013 11:51:50 AM
SAE is real picky about this..
THIS DOCUMENT IS PROTECTED BY U.S. AND INTERNATIONAL COPYRIGHT.
It may not be reproduced, stored in a retrieval system, distributed or transmitted, in whole or in part, in any form or by any means.
Downloaded from SAE International by Gary xxxx, Tuesday, April 09, 2013 11:51:50 AM
SAE is real picky about this..