yes no I like your going big block ,I have a friend has an old 426 hemi to the guy above an there can be a lot more then few pounds difference ,from that to sbc 406 I have ,my engine is about 550lbs with all the goodies ,actually light over all then the lt1 with all the goodies ,the 426 big block hemi is 800lbs + ,an I know couse I have had my hands in on pulling both ,an went to gm for the weight an mopar for the weight,the bbc 396 to 454 weight 685 ,I would say it more then few pounds not to debate though ,my only point was what some guys like an others don't, all Aluminum engines are lighter ,a 632 not aluminum 830lbs ,now we all now how much lighter aluminum is ,an how much more it cost ,so that makes huge difference,an yes one can make more hp with bbc easyer then sbc .but one can still make for the road all they need,so actually it can be fromlike 220lbs to 300lbs from sbc to bbc,iwas going to put 454 in my 95 ,but needed to think about the upgrade to shocks that would handle the extra weight ,but like this gentleman is doing with his gen 2 ,it wont matter ,he is building a nice show car ,that will be a lot to talk about now an when he is done ,I would love to go that direction one day I been looking for an think about a 79 to 81 myself ,something with a desent body,hp is # if one starts talking turbo ,an nitrous ,that can be game changer to for hp from sbc to bbc or a supercharger

 

Why the comparison to a monster 426 Hemi? In keeping with making apples to oranges comparisons, might as well suggest this engine may be a tad bit on the heavy side as well, lol....

 

only couse it was said that theres only few lbs difference between a sbc bbc even the 632 is 300lbs more then a sbc like my 406 is what I was saying an about the same weight as a 426 hemi, hehehehe that's a junk yard sorry glacia just having a little fun

 

What an engine.........a ship engine

 

No, you need to read carefully! You were talking about various differences in the weight of SBC engines, and my reply was the differences in VARIOUS SBC ENGINES was only a few pounds. Not the difference between a SBC and a BBC.
That said, a SBC is indeed lighter, but putting a pair of good aluminum heads on a BBC makes it very close in weight to a SBC, as the heads are the biggest weight difference in the two designs. You can cut somewhere around 70 lbs. off a BBC weight. A SBC with iron heads weighs about 440 lbs., and a BBC with aluminum heads weighs about 515 lbs. Still heavier, but considering it's only 75 lbs, I'd take the BBC still. And considering how big you can go in a BBC, it can really be worth the extra weight if you're going to go up in the 502 ci or larger range! I think it's worth it, even for my 464 ci engine.

 

Just copied text from Sudstoy just to keep this info on mine as well.

 

As a reply to Sudstoy:-


The 4L80 with 4 gears is the best for me. As the first 3 ratios are the same as the TH400 but with an added overdrive of 0.75. And I can go with the 3.5 or lower on the rear end as you mentioned.


I checked the 4 speed full manual 4L80E quadzilla on PATC website. They say that it can handle the torque of the 572.


I already bought the B&M mega shifter for the TH400 and is not compatible to the 4L80E, although it is compatable to the 4L60. If I go for the 4L80 I need to buy another shifter.


When you say 4L80E with full electronics, you still need a mechanical shifter?


There are so many upgrades you can do to this 4L80E that I get confused!!

 

Ok, a 4L80E is a 4 speed automatic and the E stands for electronic. It means that there is a transmission control module that controls all of the parameters in the transmission. There is a ton of stuff that goes on in new school transmissions. When i say with full electronics, i mean with a transmission control module controlling the shifting. You could run a different type of shifter for this, not an old mechanical one. You could put something cool like triptronic shifter or something else custom like that as long as it is able to send a signal to your TCM.

Which B&M shifter do you have? I would be it works on a 4L80.

I am completely happy with my transmission from that website. Like i said, i have the Quadzilla with upgrades. The quadzilla has all the electronics stripped off to make it a full manual shift transmission. If you are stopped, you put it in 4th gear, you are in 4th gear. It will not shift unless you move your shifter. The upgrades i have are the torque converter and hardened shaft for nitrous. According to PATC, the stock transmission without any upgrades is good for 1000hp.

If you decided you wanted to buy the quadzilla, install is easy, there are no electronics, and just order the transmission with their torque converter and dipstick tube and you would be done. You dont have to worry about upgrading anything. You could also get a hold of them directly, give them your engine specifications and what your car is like and see what the recommend.

 

I will go for that quadzilla for the reason of the added overdrive and no mods to the tunnel. And rear I go for 3.55 as advised by Nelson Racing Engines. If the 3.55 is good for the TH400, it must be good for the 4L80 since both first 3 gears have the same ratio.


The B&M shifter I ordered for the TH400 is P/N:- 80694. On the summit racing it says that this shifter is applicable to TH30, TH400, 700R4 and 4L60. I just called B & M and told them I have shifter 80694. I asked if 80694 is good for the 4L80 or if there are any mod kit I can use on 80694 to fit 4L80. He told me that the 80694 is not compatible for the 4L80 and 80688 should be the good one for 4L80.


When I compared 80694 (for the TH400) and 80688 (for the 4L80) on the website, they both have the same has the same transmission application with the 80688 is applicable to the 2004R while the 80694 not. Is the 2004R like the 4L80 maybe?



B&M Automatic Shifter, Console Megashifter 1973-81 Camaro, 1970-81 Firebird » B&M Shifter, Console Megashifter 73-81 Camaro, 70-81 Firebird


B&M Automatic Shifter, Console Quicksilver » B&M

 

I like the style of the Megashifter shifter that you're getting better than the Quicksilver.
Don't know what the difference would be though. The instruction manual says to remove the pin and e-clips if using with a 4 speed trans, but doesn't mention 4L80. Are the detents spaced differently perhaps? I dunno.