big block streetability,in all seriousness

I will be building a 1393 or 1428cc motor for my dragbike. I just purchased the big block, and will soon be searching for pistons. I have really been thinking about which route i want to take on compression. If i can get compression down to around 9 or 10:1 would it be possible to remain somewhat streetable? I will not have wild cams, and will be using flatslides. By streetable, i am only wanting to ride it maybe a 40 mile stretch total. I will be running an oil cooler, and I plan on doing the dry block mod posted earlier on the forum. If all streetability will be lost by using the big block, i will just go radical and go high compression.

Seems fuedal building a big block with 9 or 10 compression ratio....although you can ask Plummen........I'm sure he has done it. He's done everything.

not as much as you sunshine! :laugh: me and larry have talked about building a motor like this many times,definately feasable with right head and cams

hahahahahhahahahaha, you old guys and you're bickering. Well wouldnt a high compression 1075 be just as unstreetable? I kinda figured i would build a motor with all the potential right away, but just stay toned down. if i want more power, i just need to go to higher compression pistons and bigger cams. I would rather have it this way than to make the same power out of a small motor at max potential. I just wanna know if i can still take my dragbike to the car show, or for a little cruise once and a while. I have other bikes to ride, so this one will be just for fun

Same thing.....your gonna spend a hell of a lot more for the big block with the same outcome. Plummen ? You now need Larry to build a project motor ? I thought you did this all your own........the mystery continues. Jordan........do yourself a favor. Give Jay a ring.

go with the big compression and if you want to run it on the street for short distances just fill the tank with some c-12 you wont want to put many miles on it anyway the cops would be all over you.

actually, i have kept everything really cheap. Funny1 from dragbike.com has been giving me a great deal on all machine work. Bought the big block real cheap from a good member here on kzr. got less into it now than i had into my 810 motor, and i have a welded crank, HD 2nd gear, backcut trans, lockup clutch, and big block.

timebomb33 wrote:

go with the big compression and if you want to run it on the street for short distances just fill the tank with some c-12 you wont want to put many miles on it anyway the cops would be all over you.

ya i hear ya. especially the cops in this town. I kinda got a reputation with the cops. will i be able to make a 20 mile trip on c-12 without too much overheating?

heres a set of 8:1 1327 pistons that will be used with a 900 crank and a shaved down plain label bigblock to bring compression up to around 9:1 with a breathed on kz head by Larry C.it will be used in place of the 13:1 1327 thats in the ol black death bike,with nitrous bottle under seat to make things interesting! it will be nice to run pump gas and not worry about staying withing 20 miles of home to get good fuel.bring on that challenge greggy,i aint scurred! :laugh:

PLUMMEN wrote:

8:1?????

Sure...a big-block on the street is feasible. Lots of them out there. I plan on doing it myself. I'm in the same spot as you...deciding on what compression ratio to use. Just remember that to get the most out of it, it will come down to the combination of ALL the parts. What cams you planning on running? They will help determine what compression ratio you might want to run. You can run high compression with any cam but the bigger cams need the higher ratio to get the full benefit from the high lifts. Smaller cams don't need the high ratio so you can get by with the lower compression ratio and be more streetable. You need to decide just how radical you want or how much power you want out of it. I know of guys running 13:1 with .460/.485 cams on the street but I'm sure it's temperamental but is sure would get gone in a hurry! Also, once you get past .435 lift, the head has to be set up different then with the smaller cams and that will dictate which cams you can run. You can't switch back and forth. Lets hear from you know-it-alls out there on your opinions on this!

c-12 burns really cool just don't get stuck in traffic if you do park it and load it on the truck rather then burn it down. i'm putting together a nitrous combo big block for next year just gathering every thing up now i will be registering and putting street bike insurance on it so i can enter it in our pro street class up here don't stand much of a chance against the turbo busa's ,turbo zx14's but it should be fun you have to be able to do a 30 mile loop on them so if i can keep it cool it should work.