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I thought our spacing was too far apart to make this feasible. Hell, id go for a gear drive on a DOHC as well over the tensioner/chain setup. Id machine the cover and whatever else to fit it if its possible.
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Ben
60DegreeV6.com
WOT-Tech.com -
No one makes a gear drive for a 660. The cam is much further from the crank than on a SBC.1993 EXT. CAB, 3.4L V6 TBI, 5spd manual. Sonoma
1990 4Door, 3.2L V6 TBI, 5spd manual. 4X4. Trooper
Because... I am, CANADIANComment
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No doubt there... Quite a big difference too, although the crank snout appears to be the same size as an SBC. Had the two setting side by side. Shoulda got pics...Comment
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Yes that is old news.Originally posted by tejohnson
The SBC and the 660 share the same size crank snout, for the timing gear and balancers. The genI and II 660 also use the same cam bolt pattern as the SBC (genI and II).
I will be working on a timing belt set-up for the Frankenbeast, but unfortunatly that is a ways off.Comment
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A belt?! How durable can that be if the chains keep stretching and breaking? I just couldn't trust a belt.Andy
sigpic
fastest 1/8: 10.19@ 67.17
fastest 1/4: 16.16@ 82.70
62mm TB, 1.6 roller tip rockers, Ostrich 2.0, UD pulley, TB heater bypass, K&N, 180* stat, No cat, 99Grand AM dual cooling fans. 4T65E swap FDR 3.69, EP LSD, F.A.S.T. transmission controller, TransGo shift kit.
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Beld drives are silent and extremly durable. They also can run dry.
Raven probably plans on a remote water pump and then you would have the ability ot actually see the belt and change it whenever. It uses a tensioner to keep the belt in check. Also it can run at extremly high RPM for a very long time. It is superior at absorbing shock and harmonics from cause by the crank.
Scroll right to the bottom.1993 EXT. CAB, 3.4L V6 TBI, 5spd manual. Sonoma
1990 4Door, 3.2L V6 TBI, 5spd manual. 4X4. Trooper
Because... I am, CANADIANComment
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pretty sweet, but how can a belt be MORE durable than a gear set? i'm really shocked at the wet set up? the belts can take oil huh?Andy
sigpic
fastest 1/8: 10.19@ 67.17
fastest 1/4: 16.16@ 82.70
62mm TB, 1.6 roller tip rockers, Ostrich 2.0, UD pulley, TB heater bypass, K&N, 180* stat, No cat, 99Grand AM dual cooling fans. 4T65E swap FDR 3.69, EP LSD, F.A.S.T. transmission controller, TransGo shift kit.Comment
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Even taken a look at 1200+ HP Pro Stock, Pro Mod, Pro Outlaw, etc. engines, about 90% of them use a timing belt set-up.Originally posted by torq455
There are many advantages to using a belt over a chain. For one thing, they don't stretch in the same way that chains do, they also have the ability to absorb harmonics that are creted by the combustion process.
*edit* I didn't see BTY reply.
The H2O pump I havn't decided on yet, how that will be, I will most likely end up as a remote set-up.Comment
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Only problem with the belt is they are much wider (I've seen how wide those pro stock belts are). Even for our application a belt drive wouldn't even come close to fitting under the cover, so it would require modifying everything else on the front of the engine and thats not feasible for some.'97 Grand Prix GT 3800 (sold)
'00 Grand Am GT 3400 supercharged
13.788 @ 103.73 mph, 320whp 300 ft/lbs
Gotta love boost!Comment
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They don't need a cover. The cover is under the drive and seals in all the oily bits. The large pulley rides on a puck that the seals of the cover ride upon. And the lower pulley is mounted directly on the crank and is sealed with another press-in seal.Originally posted by AaronGTR
Since the usual V660 has the water pump mounted to the cover, another kind of pump, possibly electric, possibly adapted from the existing water pump would be necessary.He who dies with the most toys is still dead.Comment
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it dosen't really sound like a supercharger, the whine fluxuates alot with the idle due to the cam i'm running.Comment
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[quote="The_Raven"]Even taken a look at 1200+ HP Pro Stock, Pro Mod, Pro Outlaw, etc. engines, about 90% of them use a timing belt set-up.Originally posted by torq455
Yeah, that's great. However, those cars don't see too much daily use that would put 50k or more on a belt.Andy
sigpic
fastest 1/8: 10.19@ 67.17
fastest 1/4: 16.16@ 82.70
62mm TB, 1.6 roller tip rockers, Ostrich 2.0, UD pulley, TB heater bypass, K&N, 180* stat, No cat, 99Grand AM dual cooling fans. 4T65E swap FDR 3.69, EP LSD, F.A.S.T. transmission controller, TransGo shift kit.Comment
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I believe nascars use belt drives for their ease of changing them out should one fail during the race. These 800hp engines are running avg of 500 miles per race so I'd say thats pretty good.98 camaro swapping in lz9 th400 setup
LZ9 specs: (Subject to Change work in progress)
4.0L(after bore 3.917 and stroke 3.3485),carrillo sbc rods(narrowed),wiseco custom forged pistons 8.5:1 CR, TCE Double Roller timing chain, gen 3 cam, P&P heads, headers 1 3/4 primaries into 3-1 collector, and going to run ms2.Comment
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Figure out how many revolutions it is making over 500 Miles. The average RPM is probabally 7 to 8 thousand.1993 EXT. CAB, 3.4L V6 TBI, 5spd manual. Sonoma
1990 4Door, 3.2L V6 TBI, 5spd manual. 4X4. Trooper
Because... I am, CANADIANComment
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Extreme other end, look at all the Hondas, Mazdas, Mitsubishis, etc that run them for 100 000 miles.Originally posted by torq455
Belt is just plain better than any chain drive.
A chain has links, that wear, that is the "stretch". There are many of these links in one chain, the longer the chain, the more stretch will occur.
Belts have no links to stretch, and with the belted construction (for lack of a better descritption) they never will stretch. How many tires have you seen grow in size (and stay that way)?
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