#1
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if youd like a little advise on building a combo...
im not a professional car builder but ive made mine to run deep in the 8s at over 155 mph-but if any questions i can help with feel free to pm me or post and if i can i will offer advice...granted other web sites have proffesional engine and tranny guys that do this for a living,(sherman,mamo,chance,etc...) i know bbc stuff a little better,but like i said i will help on combos...
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#2
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I'll be hitting you up for some advice in about month Russ, and well then probably all summer too. We'll be heading down to the Grove a few times this year again, we will have to hook up and chat.
Jeff
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Jeff 1969 Chevelle SS, 505 CID BBC 686hp, Tremec TKO600, 12 bolt 3.73 rear 5 speed 2007 Trailblazer SS, LS2, 4L70E, AWD, 4.10 gears Its a 475 hp daily driving grocery getter 2006 Cadillac CTS-V LS2 and a 6 speed |
#3
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I would like to know what you think of the motor combo we choose for our 72. Thanks
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Dave |
#4
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looks like a torquey lil small block...what cubes and operating rpms u wanna spin in>??? also is it gonna see nitrous? i dont know what compression will be but looks like youll have fun!!! motor running yet>?
Last edited by russ67chevelle; 01-29-2010 at 12:37 AM. |
#5
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It should stay under 5300 with the hyd roller cam. Comp should be about 9.8
Not planning on any nitrous but maybe down the line a porting job may be in order. Was considering a 770 avenger carb but the consensus is the 650 dbl pumper should be fine. Any thoughts on that ? Thanks
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Dave |
#6
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what cubes? i may of missed it-if so sorry....also good heads are a prerequisite for good nitrous results...especially good exhaust side,typically a cam that is nitrous friendly will have a lil more exhaust duration and or lift than a n.a. exhaust...
never had an avenger, i dont know of anyone that has one personally....double pumper is a hard one to beat especially if u wanna do some 1320 laps carb size is dependent on size of motor and operating rpms. you said max around 5300 so if it is around a 355 that is warmed up, id say 650-700 should be good, if it was same but a 406 or bigger, then id start at a 750 and go as much as a 950 |
#7
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New to the Strip
I am new to the game. I have a 72. I blew my 350 and dropped in a 454. I love cruising in my car and running parades and stuff. I recently went to the drag strip and got to run my buddy's trans am and I am hooked! I have a 700r4 trans. I desperately need gears. I have a stock 10-bolt malibu rear end. I don't know what gears I have but i have been doing some research and I think I have 2.56's. I definitely want to go higher and switch to a posi. I need some direction. I need information and places where I can find what I am looking for.
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#8
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Quote:
With the torque of a big block, you shouldn't need tractor gears to go fast, probably somewhere between a 3.50 gear and a 4.11 gear. You do have a great transmission, with the aggressive first gear, and nice high overdrive. I think you ought to be looking to beef up if you plan on romping on this thing and expect any sort of longevity. You need either a 12 bolt GM rear, or a F@rd 9" rear...and definitely some sort of limited slip carrier like a true-trac, or posi, or the like. The tough part is that you'll need $2000 plus to go buy one, built and ready to bolt in. 10 bolts like yours (and mine ) don't do so well with stout engines or hard launches. |
#9
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3.73
I have been leaning toward 3.73 gears. Do you think the 10 bolt will hold up with those if i do a locker unit? Where is the best place to buy gears and possibly a locker? I definitely don't want to cheap out but at the same time I need to watch my budget considering that I am a full time college student.
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'72 Chevelle 454/700r4 |
#10
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If your car spends any time anywhere but the track going in a straight line, a locker is a bad idea. I don't know that it would make it any stronger either.
Some people have 10 bolts behind bigblocks. I wouldn't, unless I knew it wasn't going to last long and was saving for something heavier. To put the right parts in a 10 bolt, with stronger axles, a rebuild kit, new posi unit, ring/pinion, etc. is right around $1200. If you start searching the internet harder, you'll find places that rebuild/sell rear ends...possibly in your area as well. Used 12 bolts for Chevelles, drum to drum, might go for $1500 ballpark. |
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