Its hp in both columns..?
Header/q16 BBC dyno test
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Re: Header/q16 BBC dyno test
So the HP should always be the same at 5200 rpm even on dyno tests with 2 different size headers ?? or a test with and without Q16?
LOL
Randy
Last edited by randy331 on Mon Apr 23, 2018 9:44 am, edited 1 time in total.
Re: Header/q16 BBC dyno test
Something like the header you suggest would be my guess too, but it is what it is at this point.In-Tech wrote: ↑Mon Apr 23, 2018 4:39 amI would bet a 2" x 8" stepped to 2 1/8" x 10" stepped to 2 1/4" x 12" to a 3" coned merge collector that grows to a 3 1/2" x 10" would work good for this cu.in/hp/rpm. But that's just me.gnicholson wrote: ↑Mon Apr 23, 2018 4:13 am 2 1/4 headers are still to big in my opinion. 2 1/8 max or 2 by 3.5
Good test Randy.
The primary tubes on the chassis headers are 33"-34" with just the collector that came on the headers. 8" or so.
The dyno headers were a little shorter primary with same length collector.
Randy
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Re: Header/q16 BBC dyno test
Sorry, my eyes where still half closed when I posted at 630 am est!
You can cut a man's tongue from his mouth, but that does not mean he’s a liar, it just shows that you fear the truth he might speak about you!
Re: Header/q16 BBC dyno test
Another 700 hp 781 head build! Nice results. If my junk doesn't make 700 hp with my 308 Iron Eagles, I'm scrapping it!
Last edited by Bob M on Mon Apr 23, 2018 2:41 pm, edited 1 time in total.
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Re: Header/q16 BBC dyno test
input 98.70% VE input in PipeMax v3.98randy331 wrote: ↑Mon Apr 23, 2018 9:42 amSomething like the header you suggest would be my guess too, but it is what it is at this point.In-Tech wrote: ↑Mon Apr 23, 2018 4:39 amI would bet a 2" x 8" stepped to 2 1/8" x 10" stepped to 2 1/4" x 12" to a 3" coned merge collector that grows to a 3 1/2" x 10" would work good for this cu.in/hp/rpm. But that's just me.gnicholson wrote: ↑Mon Apr 23, 2018 4:13 am 2 1/4 headers are still to big in my opinion. 2 1/8 max or 2 by 3.5
Good test Randy.
The primary tubes on the chassis headers are 33"-34" with just the collector that came on the headers. 8" or so.
The dyno headers were a little shorter primary with same length collector.
Randy
and it gets = 711.5 Peak HP at 7000 RPM
needs a 1143 CFM Carb ... and you have 1150 CFM Carb .. great !
Header Specs are :
--- Single Primary Pipe Specs --- ( Mid-Range TQ to Higher RPM Horsepower )
Diameter= 2.058 to 2.183 Total Length= 32.3 to 35.5 inches long
a 2 1/8th Primary Pipe would be worth testing
--- Conventional Straight Tube Collector Specs ---
( TQ ) Diameter= 3.503 to 3.753 Best Length= 17.4 and also 34.8 inches
( HP ) Diameter= 3.753 to 4.253 Best Length= 17.4 and also 8.7 inches
Re: Header/q16 BBC dyno test
I'd be surprised if it didn't respond to some faster lobes based on what we've seen in the past.
He's talking about a more serious build for this same class. Better bottom end parts. Some lighter valves would be nice too.
More compression, more rpm, etc.
Rules are very open on the heads, other than it has to be a GM head.
We'll see how it goes.
Randy
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Re: Header/q16 BBC dyno test
Aluminum ...?randy331 wrote: ↑Wed Apr 25, 2018 12:41 amI'd be surprised if it didn't respond to some faster lobes based on what we've seen in the past.
He's talking about a more serious build for this same class. Better bottom end parts. Some lighter valves would be nice too.
More compression, more rpm, etc.
Rules are very open on the heads, other than it has to be a GM head.
We'll see how it goes.
Randy
Bow Tie or O.E.M. Production ...?
http://www.rmcompetition.com
Specialty engine building at its finest.
Specialty engine building at its finest.
Re: Header/q16 BBC dyno test
Sorry I should have clarified better, iron GM heads only on big block.
So any iron head from GM, welding etc is legal.
Randy
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Re: Header/q16 BBC dyno test
In that case I would probably run the #6272990 heads; LS-6 & LS-7.
http://www.rmcompetition.com
Specialty engine building at its finest.
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Re: Header/q16 BBC dyno test
Yea, I agree. Like it to be a bigger bore shorter stroke of same cubes of much better parts.Walter R. Malik wrote: ↑Wed Apr 25, 2018 10:58 amIn that case I would probably run the #6272990 heads; LS-6 & LS-7.
4 inch strokes produce a lot of piston speed.
Titanium valves too.
He said he may just go ahead and start making payments on his future engine. LOL
Randy
Re: Header/q16 BBC dyno test
Well, the engine in this thread is going to get some up grades over the winter.
It's getting an aftermarket block for reliability and for future use as a more serious build.
Don't look like his budget is gonna allow titanium valves so the current cam will stay, but we may test positions on the dyno this time. Didn't last time.
Probably step up the vacuum some since it liked that.
A different intake is one up grade. It has a 4150 hvh now. What intake would the ST crew suggest ?
May do some more work on the heads too.
I'll give it some more comp.
May test collectors.
Other budget friendly ideas ?
Randy
It's getting an aftermarket block for reliability and for future use as a more serious build.
Don't look like his budget is gonna allow titanium valves so the current cam will stay, but we may test positions on the dyno this time. Didn't last time.
Probably step up the vacuum some since it liked that.
A different intake is one up grade. It has a 4150 hvh now. What intake would the ST crew suggest ?
May do some more work on the heads too.
I'll give it some more comp.
May test collectors.
Other budget friendly ideas ?
Randy
Re: Header/q16 BBC dyno test
So the dyno headers test and the test with Q16 are exactly the same, hp/hp, rpm/rpm? What fuel was used in the header testing?