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| djxib | Help identifying this engine | ||
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Senior Guru
 
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My son has an option to buy a used V8 for his drift car, but we're struggling to identify it. Block casting number is from an LS2 (12568952) and it is an aluminum block. Head casting numbers are from an L92 (5364) and are also aluminum. It has a truck intake. The partial VIN shows me it is from an '07 vehicle, and the seller says it either came from a duramax truck or a Yukon XL. There is another stamp on the block (in two places) that reads X207818. Behind the flexplate it has a "6.0L" stamp.
After about 2 hours research I think it is either a Vortec 6000 or a LY6. It seems like a nice motor to use in a race car - apparently the L92 heads will accept an LS3 intake, although he'll have to remove the drive-by-wire TB stuff. Also if it has vvt he may need to switch out the vvt cam for a regular LS2 cam for high-RPM use. Any guru guidance on confirming the identify of this motor? |
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Posted on: 2011/11/22 13:10
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Andy 1996 Greenwood Collectors Edition LT4 Previously 1992 Convertible Polo Green. 383 LT1/LT4 forged/balanced. V7-YSi, Alky. 608RWHP... Now sitting at a dismantler with a salvage title. Still runs... |
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| 1Fast04Vert | Re: Help identifying this engine | ||
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Elite Guru
 
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Posted on: 2011/11/22 13:30
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2004 Vert. 475hp. Built by Vengeance Racing |
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| djxib | Re: Help identifying this engine | ||
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Senior Guru
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Quote:
Thanks Andy, I saw that thread a couple times. L92/LS3 are both 6.2L engines whereas this has a 6.0L - which leads me to think its a LY6. However I found contradictions that say the L76 was used in both Australia (including Pontiac G8) AND the US (Yukon etc.)... which means it's either a LY6 or L76. Now my head hurts... |
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Posted on: 2011/11/22 14:02
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Andy 1996 Greenwood Collectors Edition LT4 Previously 1992 Convertible Polo Green. 383 LT1/LT4 forged/balanced. V7-YSi, Alky. 608RWHP... Now sitting at a dismantler with a salvage title. Still runs... |
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| 383tpimachine | Re: Help identifying this engine | ||
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Master Guru
 
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For a high rpm I would get rid of the VVT and change heads to a nice cathedral setup like trickflows, PRC, AFR, or TEA. THe big valves of the Ls3 heads dont like rpm.
This will also allow you to run a Ls6 intake which are the best for the money. Yes you have a LY6 due to the truck intake. GREAT base engine. Might look into rod bolts to help the bottom end but beyond that the shortblocks are great. |
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Posted on: 2011/11/22 17:35
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1985 Atomic Orange 400YSIT56-Racecar build 1970 El Camino-Awaiting LSX |
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| j3studio | Re: Help identifying this engine | ||
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Elite Guru
 
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A) I totally believe you. B) We're proud new owners of an LS3. C) It will never be raced. D) I'm just curious. The question: at what kind of RPMs do those big valves cause problems? Can you tell me why? |
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Posted on: 2011/11/22 22:03
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Grace, 2003 50th Anniversary Convertible |
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| 383tpimachine | Re: Help identifying this engine | ||
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Master Guru
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Quote:
They are fine up to 6800 or so rpm with STOCK springs. Beyond that better springs/rockers are advised to control the valvetrain events better. Plus I am not a fan of hollow valves Those heads are also thin. So I do not like them with boost. Nitrous is more forgiving but I would want to aftermarket castings for boost. |
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Posted on: 2011/11/22 23:02
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1985 Atomic Orange 400YSIT56-Racecar build 1970 El Camino-Awaiting LSX |
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| j3studio | Re: Help identifying this engine | ||
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Elite Guru
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Quote:
Very educational - thank you!  |
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Posted on: 2011/11/23 0:22
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| 383tpimachine | Re: Help identifying this engine | ||
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Master Guru
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I do not want to scare anyone off. They are awesome heads for very cheap. Send them off to WCCH and they flow 370cfm. That is just unheard of from a 4.06 bore OEM head. Send some 243 (c5z06 heads) off to Ai and have them ported and you get great numbers as well with better velocity. |
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Posted on: 2011/11/23 1:58
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1985 Atomic Orange 400YSIT56-Racecar build 1970 El Camino-Awaiting LSX |
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| j3studio | Re: Help identifying this engine | ||
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Elite Guru
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Quote:
(I'm refusing to quote the whole thread because I think folks will kill me  )In the end, you guys are so much more serious than we are. We live for the "Corvette lifestyle" and we happily drive our either completely stock or 99% stock motors (which are still 95th percentile motors compared to everybody else out there). I look at the "daily driver" LS3 with 436 bhp versus my flighty L98 with 230 bhp and I have to laugh. But ... ... we remain very interested in what would happen if our motors were really pushed. |
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Posted on: 2011/11/23 2:45
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Grace, 2003 50th Anniversary Convertible |
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| bogus | Re: Help identifying this engine | ||
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Grand Imperial Pooh-Bah
 
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John,
Engines are amazing things... F1: 2.4 litre V8, 122ci(?) give or take. 18k RPM redline, limited DOHC with pneumatic valve actuation. The valves are mechanically sucked closed... or else valve float - when the valve no longer responds to the cam - would kill the engine. 850hp ~300 lb-ft torque NASCAR engine: The latest NASCAR motors are no longer based on street engines. The entry of Toyota changed all that. It's still an iron block, push rod, but can now be made as a bespoke race engine and not a street based engine. The current line of GM R07 racing engines. These engines look much like an old small block, but are not. They don't share anything with the LSx family... at all... and they don't share anything with the original SB family. The heads are sorta like the LSx family, but not the block. Cam is in a different location. Higher up to shorten the pushrod and enlarge the bearing. Bigger bore center for improved cooling. Better cooling overall Better oiling (remember, it was stock based, now it can be designed right instead of retrofitted) Shaft mount rockers Still 358ci, 2 valve, pushrod V8. All of these things add up to... 850hp ~500 lb-ft torque 9800 RPM redline It's fascinating to me how two organizations can come up with the same basic power number in two such different manners. Think about this for a few minutes... wrap your head around this: As I have mentioned in the past, my brother had a 1967 big block, L71 tripower, 435hp. This was SAE Gross HP and torque (about 450lb-ft). This motor, 427ci of outright anger would get, at best, 10mpg. Period. And needed 101 octane or else it would pop. Don't forget, no PS, no PB, no AC and only a 4sp with 4.11 gears. No top end. 60mph = 3000 RPM! Compare this to your new LS3 powered Vette.436 SAE NET HP. Huge difference right there. The 67 was quick, but to make it hook up, you needed something more than Firestone Polyglass GTs. So you get some drag slicks or something... and then you would sorta hook up. 0-60 about 5 seconds; 4.5 if you knew what you were doing. 12 seconds in the quarter. Very fast. But your stock LS3... with the new A6 auto will smoke that 67 in all performance measures, and get 30mpg on the highway doing it. It's that mind boggling? |
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Posted on: 2011/11/23 3:10
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The single biggest problem with communication is the illusion that it has taken place. - George Bernard Shaw Education is the best tool to overcome irrational fear. - me |
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| 383tpimachine | Re: Help identifying this engine | ||
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Master Guru
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Bogus great comparison but just think if the nascar engine wasnt restricted.
I would love for nascar to open up to the forced induction game. All in all I wish I had speed channel (never had more than 4 basic channels) to catch more F1 races |
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Posted on: 2011/11/23 3:31
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1985 Atomic Orange 400YSIT56-Racecar build 1970 El Camino-Awaiting LSX |
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| BillH | Re: Help identifying this engine | ||
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The Stig Moderator
 
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Quote:
In 67 only the military was thinkin' about computers. In 67 nobody imagined watching Nascar on their telephone.  In 1970 you could buy a 67 for $3k.  In 2011, you'd probably feel good if you kept something from 1967. . . . . . F1 was more fun when they had 1,100 HP.  |
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Posted on: 2011/11/23 14:19
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Every man dies but not every man lives. |
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| 383tpimachine | Re: Help identifying this engine | ||
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Master Guru
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Quote:
And worse aerodynamics |
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Posted on: 2011/11/23 17:29
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1985 Atomic Orange 400YSIT56-Racecar build 1970 El Camino-Awaiting LSX |
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