BBC 555 dart vs rpm intake
#41
Registered
iTrader: (3)
I only mentioned finished runner size for those who may be curious. I wandered off a little from my original post. And yes I do understand flow and velocity. Been at it a while and worked along side valako and flowed many heads including some of my own. Thanks to my thread my builds have now slightly changed. Tks black baja for putting my original plan back in motion.
Interesting transition though. We have moved on from a dual plane intaked 565, to tunnel ram setup! I like it .
#42
Registered
Thread Starter
iTrader: (7)
I was just mentioning it, as many read these kind of threads, and think runner volume is the deal maker, or deal breaker, on a build, and it simply isnt that cut and dry. I was not aware of your cylinder head backround, just going off what I read from posts. I was assuming by your posts you were insinuating that since the heads have been opened up from 310 to 320cc, it should have some effect on the build result/design.
Interesting transition though. We have moved on from a dual plane intaked 565, to tunnel ram setup! I like it .
Interesting transition though. We have moved on from a dual plane intaked 565, to tunnel ram setup! I like it .
#43
Registered
iTrader: (1)
Raised Port Oval 24*
BP BB-3 XTRA O 332
(CNC Ported/
50° Valve Job)
2.300 Intake
153
231
300
354
396
424
425
428
1.880 Exhaust
130
177
239
278
284
290
295
297
BP BB-3 XTRA O 332
(CNC Ported/
50° Valve Job)
2.300 Intake
153
231
300
354
396
424
425
428
1.880 Exhaust
130
177
239
278
284
290
295
297
#44
Registered
iTrader: (4)
Your heads will indeed be 320’s after Jim does his port work to them. As you also know this will include welding the floors and modifying the runner shape and when all is said and done the intake will be 320 as you have stated.
Your heads will flow the same as mine and if Jim didn't give you the flow numbers here are the numbers from my Valako Pro 1’s.
.20 149/130
.30 225/171
.40 295/206
.50 348/256
.60 380/286
.70 394/300
Your heads will easily support the power you are going to make and are with within a few CFM’s of the AFR’s thought the entire range. I agree it would have been interesting to see what the AFR’s would have been capable of, but I doubt they would have made any additional power.
So did I read it right- are you going to go with tunnel rams on your new engines?
Your heads will flow the same as mine and if Jim didn't give you the flow numbers here are the numbers from my Valako Pro 1’s.
.20 149/130
.30 225/171
.40 295/206
.50 348/256
.60 380/286
.70 394/300
Your heads will easily support the power you are going to make and are with within a few CFM’s of the AFR’s thought the entire range. I agree it would have been interesting to see what the AFR’s would have been capable of, but I doubt they would have made any additional power.
So did I read it right- are you going to go with tunnel rams on your new engines?
#45
Registered
iTrader: (2)
I'll throw this out there also when you spend $4000 + on a fully cnc'd heads from AFR or Brodix you end up with a set of heads with a crap valve job on them. Brodix's valve job a little worse than AFR's.
#46
Registered
iTrader: (1)
In case anyone is ever interested, HVH has a raised oval port Brodix head that is around 300-305cc's.
I have the flow #'s somewhere, but in meantime , here is a pic. You can see how far the runners are raised.
Compared to normal oval port location
I have the flow #'s somewhere, but in meantime , here is a pic. You can see how far the runners are raised.
Compared to normal oval port location
Last edited by SB; 06-23-2016 at 06:54 AM.
#47
Registered
iTrader: (3)
Your heads will indeed be 320’s after Jim does his port work to them. As you also know this will include welding the floors and modifying the runner shape and when all is said and done the intake will be 320 as you have stated.
Your heads will flow the same as mine and if Jim didn't give you the flow numbers here are the numbers from my Valako Pro 1’s.
.20 149/130
.30 225/171
.40 295/206
.50 348/256
.60 380/286
.70 394/300
Your heads will easily support the power you are going to make and are with within a few CFM’s of the AFR’s thought the entire range. I agree it would have been interesting to see what the AFR’s would have been capable of, but I doubt they would have made any additional power.
So did I read it right- are you going to go with tunnel rams on your new engines?
Your heads will flow the same as mine and if Jim didn't give you the flow numbers here are the numbers from my Valako Pro 1’s.
.20 149/130
.30 225/171
.40 295/206
.50 348/256
.60 380/286
.70 394/300
Your heads will easily support the power you are going to make and are with within a few CFM’s of the AFR’s thought the entire range. I agree it would have been interesting to see what the AFR’s would have been capable of, but I doubt they would have made any additional power.
So did I read it right- are you going to go with tunnel rams on your new engines?
#49
Registered
Thread Starter
iTrader: (7)
No believe it or not he hasn't. Talked with him this morning. He's gonna get back with me today and get some other heads coming. We had a lengthy conversation but interesting to say the least.