[Slo2]

Ok, So I desided to get off of my butt and put my feelers on for a well priced BB 454. I dont have a bucket yet, But I can always get one once the motor is done. I want to know what you all think. Im trying to get a chevy BB 454. I would like to have it done .40 over with a copression ratio of 7.5:1-8:1. I would like the compression at that so I can run a descent boost on pump gas with a Weiand 6/71 Blower. I would also like to have the possibility of maybe a 200shot. The NOS is not set in stone, But it would be nice to have the option. I would most likely use a holley cam with a lift of .555/.571 to give it that old Hot Rod rough idle. Also the 7.5:1 will allow for 10lbs of boost, as the 8:1 will allow for 6 lbs of boost on pump gas per Weiand specs. The carb set up will be dual 750s. Heads From what I hear are fine at stock with a valve Job... Please correct me if this set up sounds wrong, or if there is a better set up that would work better. It will be a heavily used street car that sees shows, and the strip only every so often. Also, Will I need a windage tray . I am probably going to go with a Milodon, or morosso over sized oil pan...I can use all the advice I can get, since I have not build my own motor since the 80s. And I have never built my own blower set up...

Thank you all for the help, and please excuse the type Os. Im just very excited.
Mike

[engine24355]

Welcome to the forum Mike! My advice is to build what you want and make sure you are satisfied with it since you will spend the most time with your car. On the other hand, a 454 is A BUNCH of motor for these little light cars especially with a blower and NOS set up (JMO). I do have a buddy that is trying to sell a complete 454 out of a mid 80's GMC truck with a 700 tranny for 1400.00 for everything including some new parts. The engine will need to be rebuilt (not sure on milage), but it is a complete package so you can use what you want and replace the other stuff. Anyway, keep us posted on the build and let me know if you are interested in the 454.

Thanks!

[RPM]

I have a blown SBC and the compression is 8.2 it will make about 12 lbs of boost and it runs on pump gas. With a blown T Bucket you ain't gonna stay on the loud pedal very long to worry about detonation very much. I have the Weiand 6-71 on my 350. On a 454 would you not want a 8-71/

[Lee_in_KC]

Originally Posted by RPM

On a 454 would you not want a 8-71?

Yep, you should definitely go with an 8-71. You're going to have to spin a 6-71 at 15% over to get 6# of boost on a 454, whereas with an 8-71 you can spin it 10% under for the same boost. The reason that's important is the higher the RPM of the blower, the more heat it adds to the charge. The hotter the air in the charge, the greater the risk of detonation. Detonation is the mortal enemy of blower motors.

NOS is overkill in my opinion (actually, a blown 454 is overkill, but that's the beauty of hot-rodding... build what you want). As RPM sez, with these light little cars, (1800-2000 pounds max), even with a blown small block as Ron and I have, you'll never be able to get more than a few hundred horses to the ground and you'll never be able to keep your foot in it for more than a few seconds.

I don't know how old you are, Slo, but if you are familiar with the gas and fuel altereds of the 60s and early 70s, those things fishtailed all the way down the track. If you put wheelie bars on them, they crow-hopped down the track (anyone got a pic of Nanook in the air handy?).

[Slo2]

RPM, since you know more than I about parts and such for this car, Im gonna say you are right about the 8/71. Im just going by the specs in the Weiand Catolog as for bb cams, and blower specs. I know they say either are good, But they do mention that the 8/71 is recommended for purely track use. But I myseld was wondering of it would work well sice im looking at a bigger engine. I deffinate ly appreciate your correction to what ivew posted, and I thank you for carine enough to let me know about it. As I said, In the past few days that ive been here, Ive already looked at your line of products, and you would know better than I .

[Lee_in_KC]

Here ya go...

[Slo2]

Lee, As I dsaid to RPM, Thank you for the correction. and for caring enoug to post about it. I am glad this forum is so willing to help. This engine is not set in stone. I have never worked with a 454 before and thought it would be fun. If you think a 350 with a 6/71 would be a better app, I would considder that also....

[Lee_in_KC]

What happened to my photo link? It was there when I first posted it. It's not a copyrighted site.

Edit: Never mind, I messed up.

[Screamin' Metal]

Hey SLO2, welcome......as LeeinKC said.....run a 8-71 with the 454 if you can find one. A 6-71 will do fine, but you'll actually be loosing a little on the street with the 6 series.
As you were told.....you can make boost down low as you were told with the 8-71......start gettingyour boost as early as 2800 to 3000.rpm. Nowthat big thing is gonna eat some horses up low.... but by the time that fat motor gets a sniff of boost you be almost doubling your torque.....not to metion probably well over 500 horses too.

Nitrious with a blower is very dangerous......I deal with stuff like that for a living. Regular 1/4 mile blower explosions I've seen while I myself standing in the staging area....8 in a lot of years.
1/4 mile cars with blowers.....running nitrious.....explosions.......13 in the past 4 years alone........1 blower never was found!!!!!! Front drive pulley and rear endplate was the only survivors......

[Slo2]

I hate looking like Im indesisive, But I really love the look of a BB on a T like in Hollywood knights. But from what you all are saying, I realistically might have to go 350-383 and make some real streetable power with that. Ive never driven a bucket, But im guessing a 350 with 500-600hp would be sufficient. I had a 65 gto with a bit over 500hp, But that beast was heavy. Like I said, Im here to learn. And if you good people who know Ts better than I suggest a different set up, who am I to argue. And not to sound ignorant, Ive always wanted a blown car. I have a turbo car now, And I constantly argue with friends about how much betters blowers look, sound, and from what I see, Perform. So a blown set up is a given. Thank you all so much for all the insite and help you have been already...Looks like I have a little more studying to do.

Originally Posted by Screamin' Metal

but by the time that fat motor gets a sniff of boost you be almost doubling your torque.....not to metion probably well over 500 horses too.

Thats an aweful lot o torque for a car that light on the streets I guess. Im going to have to go back to the drawing boards. Maybe my Big Block days havent come yet...


Mike.