Just picked up a set of 049 heads today. Went to a local junk yard, set about looking for the 781s because they are more plentiful, but was very happy to find the 049s. To me, already having a big domed piston, the 049s having a slightly larger bowl will service to,lower my compression hopefully where I need it. I ended up trading a th350 transmission I picked up the day before, it was still in the back,of,my truck, traded for the heads even. I had 100 bucks in the trans.
Now I can see why sometimes just 'throwing' in a big cam and not getting much improvement is a strong possibility when not doing any headwork by someone like this who knows the specs
I'm thinking that on a dead stock truck engine rebuild this might be something to do since you will be running the stock truck cam. Might perk the old girl up a little.
@@daltonanderson5116 stock 088 heads, no porting, 2.19/1.88 valves and the cam is a Howard's hydraulic roller camshaft. What camshaft are planning on using? What's your hp goals?
this is a good example of putting too big of a camshaft in a motor that the intake ports have negligible gains at .600 lift. there's no gain in putting a .700 lift cam with this head because the intake ports stop flowing well at about .500-.550 lift.
If you stop your cam lift a 500 it will only hit it at the top of the lobe while if you were to have it higher it would hit the 500 mark twice, when its coming up the lobe and down the lobe, would be especially better with a flat tappet since the lobe are less agressive.
I’m working on building at 496 with 781 heads. I want to put larger valves in and use a 292h (292/292 advertised duration 550/550 lift) think that will work well I don’t plan on porting because I’m not comfortable enough to do it
I bought a set of oval heads with the big valves installed 2.19 intake and I will try to get into the 280 cfm range at 5.43 lift, my ultimate goat is 550hp with 10.5.1 compression. I have a single plane 4150 intake, 1050cfm holley on 454 cubes internally balanced. I would like to hear your thoughts.
Their is no need to shut down the bench between lift adjustments , I had a SF100 in 1970 and a SF600 which was serial # 11 , another mistake he makes is you never flow the Ex, w/o a pipe , the numbers will always be wrong,
Interesting, so would that mean since the RECT. port heads came with 2.19 they are superior to the oval? I remember many magazine and racers discussions on the oval VS rect. head choice
No, I just worked on a pair of 990 Rec head and the factory 2.19 valve job was a joke. HAD to take them to 2.25 to get any sort of 3 angle on the thing, factory was a very sad bowl area.... :(
I am 62 and remember 'back in the day' people getting a substantially bigger cam and throwing it in and wondering where all the added performance is--now I see why
Rect port heads out flow ovals by a mile!! You can buy much better aftermarket heads today for less than you will invest in an old set of iron rect ports, but if you have a set, by all means use them!! If you're building a below 6500 rpm street rod, then oval's are a much better choice.
Great job Mark!
Just picked up a set of 049 heads today. Went to a local junk yard, set about looking for the 781s because they are more plentiful, but was very happy to find the 049s. To me, already having a big domed piston, the 049s having a slightly larger bowl will service to,lower my compression hopefully where I need it.
I ended up trading a th350 transmission I picked up the day before, it was still in the back,of,my truck, traded for the heads even. I had 100 bucks in the trans.
Now I can see why sometimes just 'throwing' in a big cam and not getting much improvement is a strong possibility when not doing any headwork by someone like this who knows the specs
Nice gain with this work on stock heads
This is good stuff. :) Thanks.
I'm thinking that on a dead stock truck engine rebuild this might be something to do since you will be running the stock truck cam. Might perk the old girl up a little.
I'm using 088 heads. On my 9.1:1 CR 496 it dynoed at 565hp and 600tq
I’m working on building a 496 with 781 heads. Was your 088 heads ported/larger valves? And what cam did you use?
@@daltonanderson5116 stock 088 heads, no porting, 2.19/1.88 valves and the cam is a Howard's hydraulic roller camshaft. What camshaft are planning on using? What's your hp goals?
I put 2.25 and 1.90 in a set of 781 heads. 578 lift.
this is a good example of putting too big of a camshaft in a motor that the intake ports have negligible gains at .600 lift. there's no gain in putting a .700 lift cam with this head because the intake ports stop flowing well at about .500-.550 lift.
If you stop your cam lift a 500 it will only hit it at the top of the lobe while if you were to have it higher it would hit the 500 mark twice, when its coming up the lobe and down the lobe, would be especially better with a flat tappet since the lobe are less agressive.
Fixing the port is the way to do it.
I’m working on building at 496 with 781 heads. I want to put larger valves in and use a 292h (292/292 advertised duration 550/550 lift) think that will work well I don’t plan on porting because I’m not comfortable enough to do it
I bought a set of oval heads with the big valves installed 2.19 intake and I will try to get into the 280 cfm range at 5.43 lift, my ultimate goat is 550hp with 10.5.1 compression. I have a single plane 4150 intake, 1050cfm holley on 454 cubes internally balanced. I would like to hear your thoughts.
With big valves, you should easily be able to get to your goat! But having over a 5 inch lift might not be doable!!
How does the turbulence change on an actual running engine? I imagine that kind of changes everything
So reshaping the throat and SSR will pick up a bunch especially going after going to the bigger valves I would think
Call me silly, but I’d move that blower toggle switch to a more ergonomic position, say easily toggleable at waist height. No?
Their is no need to shut down the bench between lift adjustments , I had a SF100 in 1970 and a SF600 which was serial # 11 , another mistake he makes is you never flow the Ex, w/o a pipe , the numbers will always be wrong,
You're right there's no need to shut it down between lift adjustments. The reason he's doing it is so you can hear him on the video.
@@Paulster2 Oh stop it!! No ones interested in your factual, intelligent comments!
@@Anarchy-Is-Liberty - 😂🤣😅
The figures he gave are multiplied to get the flow numbers
He was reading off the percentage from the flow meter., not the actual CFM numbers. (Big difference)
The actual cfm numbers are right there beside the damned gains he has written down, I don't understand the problem here?
Interesting, so would that mean since the RECT. port heads came with 2.19 they are superior to the oval? I remember many magazine and racers discussions on the oval VS rect. head choice
No, I just worked on a pair of 990 Rec head and the factory 2.19 valve job was a joke. HAD to take them to 2.25 to get any sort of 3 angle on the thing, factory was a very sad bowl area.... :(
I am 62 and remember 'back in the day' people getting a substantially bigger cam and throwing it in and wondering where all the added performance is--now I see why
Rect port heads out flow ovals by a mile!! You can buy much better aftermarket heads today for less than you will invest in an old set of iron rect ports, but if you have a set, by all means use them!! If you're building a below 6500 rpm street rod, then oval's are a much better choice.
What's a 10101140 bbc head from? Any good
Is a 049 head any good
Yes, they're very good (with some work done)
With those heads the most power you will ever see out that engine is 552hp
Haha, that's a very precise number!
That is why you need a supercharger.
You are absolutely incorrect! 600-700 HP
@@trailerparkcryptoking5213 You're both incorrect!! ROFLMFAO!!!
@@Anarchy-Is-Liberty Look guys.....! We found the know it all BBC head god!!! 👀 🤣💩🤣🤡🤣