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Old 01-11-2012, 03:22 AM   #1
etjones
 
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Default 706 cid BBC for Drag Week

Guys, what do you think, will this live as a street motor.
706 cid BBC
11.1 deck 4.600 bore 4.480 bore spacing Dart Race block
5.3 Callies crank
7.25 Oliver rods
trying to keep the comp. around 11 to 1 & run pump gas on Drag Week
Dart 11 degree RFD spreadport heads & sheetmetal intake
Nitrous 55 MM camshaft
tunnel ram with 2 doms.
2 kits of Nitrous (1 fogger & pair of plates).

I have only ran 540's & had a hand on a 632 BBC nitous engine. I have never ran anything bigger than a 632 BBC. Just dont know if this would live with some stret miles, then change fuel & spray the thing at the track. Please share some info, if you have some.
Thanks
Dennis
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Old 01-11-2012, 05:25 PM   #2
lun40119
 
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Sounds cool to me. What Class? Pay special attention to the valvetrain. That is what is going to kick your ass on Drag Week!!!
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3V Performance 23 Pumpgas 402
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9.754 @ 136.30
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Old 01-11-2012, 07:17 PM   #3
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Quote:
Originally Posted by lun40119 View Post
Sounds cool to me. What Class? Pay special attention to the valvetrain. That is what is going to kick your ass on Drag Week!!!
This and make sure you put a good high quality ring pack in. Stay away from the fancy race only stuff (dykes, low tension bla bla) Ackerly is a good choice IMO.


Corey
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Old 01-11-2012, 09:15 PM   #4
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Originally Posted by lun40119 View Post
Sounds cool to me. What Class? Pay special attention to the valvetrain. That is what is going to kick your ass on Drag Week!!!
If it makes it, it will be BBC , power adder class. The car is kinda a Outlaw 10.5 street car. I was thinking of the same thing as for a valve train. I know in a motor this big, the camshaft will have to be big, which comes with lots of spring pressure. Dont really know what is the best route to take there, yet. It will have Jesel Shaft Rockers & Isky Red Zone bushing lifters in the 706. I dont think I would have a camshaft or lifter problem, but springs & push rods are another story.
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Old 01-12-2012, 11:52 AM   #5
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Depends on how you go about having a big cam. Make sure the core is big, and the lobes are friendly. I have .866/.848 lift in my 23 deal, with a little PSI 1.400 diameter spring with 130/580 pressures. It spins clean with no bounce to 9000 on the spintron.
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3V Performance 23 Pumpgas 402
1.321 60'
6.143 @ 110.46
9.754 @ 136.30
1st Place Drag Week 2012 SB/NA
2nd Place Drag Week 2011 SB/NA
http://www.youtube.com/user/excedrin.../4/v1Tff2or1oY
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Old 01-12-2012, 02:22 PM   #6
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Originally Posted by lun40119 View Post
Depends on how you go about having a big cam. Make sure the core is big, and the lobes are friendly. I have .866/.848 lift in my 23 deal, with a little PSI 1.400 diameter spring with 130/580 pressures. It spins clean with no bounce to 9000 on the spintron.
Wow , that is not much spring. I am going with a 55 MM core & going roller cam bearings (I think).
I really dont plan on spinning mine over 8000 at all. I am gearing to car to keep it under 8000 thru the 1/4 mile. Then if I run 1/8 mile stuff, what it runs, is what it runs. Curtis at RFD is building my heads, & what ever he thinks is what we will go with on the springs. The heads will have TY intakes valves & steel exhaust valves. Hope it all will work.
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Old 01-14-2012, 01:47 AM   #7
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Sounds like a cool build. Like Jake said, you have to make the vale train live. I would suggest S/S shaft rockers over aluminum for real street car stuff. That being said the motor is only a small part of surviving drag week. The first day last year it was101 degrees, at one point. That evening/night at the hotel, I herd the words (VAPOR LOCK) more times than I herd the words (COLD BEER). If your planning on doing drag week, dont worry about getting the last 20 hp out of your build, kinda like what Corey was getting at.
.
Jason
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Old 01-14-2012, 05:06 AM   #8
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Originally Posted by prostreet34 View Post
Sounds like a cool build. Like Jake said, you have to make the vale train live. I would suggest S/S shaft rockers over aluminum for real street car stuff. That being said the motor is only a small part of surviving drag week. The first day last year it was101 degrees, at one point. That evening/night at the hotel, I herd the words (VAPOR LOCK) more times than I herd the words (COLD BEER). If your planning on doing drag week, dont worry about getting the last 20 hp out of your build, kinda like what Corey was getting at.
.
Jason
I know just what you are saying. I am going to build the whole thing to survive & drive. Building it 1 way & what it runs is what it runs. I want the thing to last for little short cruz-ins & Sat night drives, as much as making long 300 miles in a day too. I would like it to have the power to make a killer past, & in the same time frame, pull right out on the street & make a drive. Hope it all works ?
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Old 01-15-2012, 08:05 PM   #9
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Quote:
Originally Posted by prostreet34 View Post
Sounds like a cool build. Like Jake said, you have to make the vale train live. I would suggest S/S shaft rockers over aluminum for real street car stuff. That being said the motor is only a small part of surviving drag week. The first day last year it was101 degrees, at one point. That evening/night at the hotel, I herd the words (VAPOR LOCK) more times than I herd the words (COLD BEER). If your planning on doing drag week, dont worry about getting the last 20 hp out of your build, kinda like what Corey was getting at.
.
Jason
No doubt!!! I fried the coating off my headers on day one, and melted a relay for my fan. It was brutal!!!
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3V Performance 23 Pumpgas 402
1.321 60'
6.143 @ 110.46
9.754 @ 136.30
1st Place Drag Week 2012 SB/NA
2nd Place Drag Week 2011 SB/NA
http://www.youtube.com/user/excedrin.../4/v1Tff2or1oY
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Old 02-01-2012, 03:15 AM   #10
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Quote:
Originally Posted by etjones View Post
If it makes it, it will be BBC , power adder class. The car is kinda a Outlaw 10.5 street car. I was thinking of the same thing as for a valve train. I know in a motor this big, the camshaft will have to be big, which comes with lots of spring pressure. Dont really know what is the best route to take there, yet. It will have Jesel Shaft Rockers & Isky Red Zone bushing lifters in the 706. I dont think I would have a camshaft or lifter problem, but springs & push rods are another story.
Hi Dennis,

We should talk to Tim at Bullet cams about this, .. these guys are right, .. it's the valve train
that can get you,

thing is, .. with good heads we can go softer on the ramp rates and make something that lives,

curtis
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