That sounds like a very good reason to use a 727 to me. If you find out you need a little more ET later, you can always do a 904 then.

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Official Cookie and Mater Tormentor.

I understand what everyone says about the 727, but what are the real world losses by not going with the 904. I know each car will be different, but just for the sake of argument lets say a car with a slant 6/904 runs a 12.50 ET. What will be the difference with the same car and set-up with the 727? Will it be 12.60? 12.80? 13.00? Just wondering.

Rick

904 would be worth 1.5-2 tenths over a 727. You can pick up another 1.5 tenths if you have the 904 rollerized.

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Official Cookie and Mater Tormentor.

Okay then.....Put the same part's in a 904 vs the same part's in a 727. Besides the weight factor, what else would I expect to gain? I still have a 904 sitting on the floor. If I could be totally convienced that a 904 would gain a tenth and a half in the 1/4...end of conversation. 904 it is. It's just that I know that I can slam 800hp/800tq plus to a 727 and have never had any problems. In my lastest project with a Gen III 392 supercharged Hemi, backed up with a RFE545 transmission, I ate up 11 transmission's in 2 season's before I could finally figure out how to build a tranny strong enough to handle the hp/tq. I just hate to do things more than once, but I'm real intested in a 904 build that will handle the hp/tq needed for the build. I'm all ear's. Thanks in advanced.

Alright Ill bite. Dennis what is rollerizing on a 904. I dont know that term.
Thanks
Frank

_________________
Scrapple: Because a mind is a terrible thing to waste.
73 Duster - Race Car
66 Dart Wagon - DD
178" FED
82 D150
All Slant powered

You replace thrust washers with caged roller bearings. Requires machining to accommodate the thicker bearing.

Read all about it... http://www.moparts.com/Tech/Archive/auto/10.html

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Joshua

Thanks Josh
Im surprised that its worth 1.5 tenths.
Frank

_________________
Scrapple: Because a mind is a terrible thing to waste.
73 Duster - Race Car
66 Dart Wagon - DD
178" FED
82 D150
All Slant powered

Yes, that does matter to install rollers. The plain plate bearings can only take so much load before fluid lube is forced out and cause extra friction and wear unless there is a method to have pressure lubication (not easy).

Anything you can make it rollerized cuts down on friction losses big time. Converting from slider cam & rockers to roller type nets whopping 75% reduction at idle friction on chrysler 2.2/2.5L. (!)

Except in few cases where extreme loads where rollers cannot be used, for example: The platform transporter that was used for Apollo program and space shuttle transfers. Well was originally tried rollers in their wheels that bears the load and were being crunched to death under tests so they used plain sleeve bearings and good old grease.
Even I watched a short section of "Dirty Jobs" shows, they scrape old grease off the tread tooth/wheels into 5 gallon buckets and use paint rollers liberally loaded with dark grey grease slop to squish/apply onto those. FYI: their steering range is 4 degree plus and minus IIRC. Yes a small red steering wheel marked in tiny degrees.

Cheers, Wizard

While debating with the 904/727 issue, I'm in the market for aluminum or titanium connecting rod's. Any help in this area? Also I'm looking into renting out a torque plate from someone instead of making one for this one time build. I'll be glad to pay all rental fee's and shipping cost's. The block was sonic checked this past week and the number's were exceptable. I don't have the numbers in front of me, but I'll get them next week and post them.

Just remember that 1.5 tenths is about the time it takes to blink your eye. In normal terms it is not much time. To a bracket racer it is an eternity.

Hemi-There are a few of those plates around the country. I am pretty sure the Cox Brothers have one they rent out. The big issue is shipping it. The plate weighs a bunch.

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Official Cookie and Mater Tormentor.

1.5 second can be a eternity too to me sometimes!

Um, Disabling the accumulator, how does the shifts feels like and how is trans life as daily driver in that regard? Because I'm about this for this referring to mopar FWD 3 speeds trans.

Cheers, Wizard

Thanks for the tip. I'll give them a call. I believe the shipping cost's would be cheaper than me making one. This is the very first SL6 project that I'm attempting. Who know's if they'll be more, so for the time being, I'd rather rent a torque plate out. This site and the information I gather is a blessing. Thanks to everyone that has suscribed to this subject.

The crank scrapers on Ebay look like a good idea.

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'72 Duster 198 stock cam, 3:23's Hookers on jack stands for 8 years in the driveway
'79 Maxivan 360 Offy Qjet Comp RV cam/rusting in the driveway.
93 D350 160HP Cummins Auto Dually Clubcab needs a injector pump
2005 Golden Couch Buick

If a Torque Plate is the same as a honeing plate then Slant Cecil (FL) and Doc (CA) both have one.
Frank

_________________
Scrapple: Because a mind is a terrible thing to waste.
73 Duster - Race Car
66 Dart Wagon - DD
178" FED
82 D150
All Slant powered

Yes they do. I took down their phone number and will be giving them a call in the near future.