AFR Blue Hornet Mopar cylinder head, Charles Servedio
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and better
PRH
Well-Known Member
Although they don’t specify it one way or the other for this head on their website, AFR usually tests the ex ports with a flow tube in place, which would explain part of the discrepancy in flow numbers on that side of the head.
Thanks for putting in the work and sharing your results.
cookietruck
Well-Known Member
Did you use a backcut valve?
The promaxx and AFR both show about 191cfm at .300” lift ok their websites.
I thought the speedmaster would be further down than this. Seems like pretty much a wash.
With a typical street build should be able to get 1.5-1.8 hp per cfm, so about 375-450 hp, crank up the cr and cam 2+ (500hp) shouldn't be impossible with any of these heads question becomes why buy AFR's and Edelbrock's and not go for TF's and more power or same with smaller cam ? SM has enough price difference to still be an option.
The Trick Flow is the best value when comparing apples to oranges. You get what you pay for.
You can get that with a ported X
cookietruck
Well-Known Member
Yeah true. If you really want steel heads.
Send them to KG engines for the cnc program. $850. Plus valve job and guides etc…$1400 in for machine work alone.
Seems like no matter what option you choose, to get heads in this bracket it’s gonna be $1700-2500.
Earlie A
Well-Known Member
AFR was tested with the AFR valve which is back cut. The ProMaxx and SM were tested with a SM valve which was also back cut.
Don’t think I have ever had a head test as well as advertised on my bench. Maybe 1 port on a TF head, but then the port right beside it may be down significantly.
PRH
Well-Known Member
I wonder which will come first……..big flow……or a hole?
PRH
Well-Known Member
That video reinforces my feelings about how unrewarding it is to chase any perceived “low hanging fruit” when reworking the Ede/SM/PM/AFR type heads.
Some of his closing comments were that the heads already had quite a bit of work on them……..and I think the “big number” was like 5cfm or so better.
Some of his closing comments were that the heads already had quite a bit of work on them……..and I think the “big number” was like 5cfm or so better.
cookietruck
Well-Known Member
Yeah. 2nd cut was def a waste.
Seems the sweet spot with these heads is a nice valve job, back cut and a bowl blend. (And the promaxx and AFR heads already have that)
And if you’re really on a budget try to score the complete SM heads 40% off and run ‘em.
Need more than that just go straight to a cnc ported head.
Seems the sweet spot with these heads is a nice valve job, back cut and a bowl blend. (And the promaxx and AFR heads already have that)
And if you’re really on a budget try to score the complete SM heads 40% off and run ‘em.
Need more than that just go straight to a cnc ported head.
MOPAROFFICIAL
If it has tits, it's a liabilititty.
Most aftermarket aluminum heads bowl is the equivalent of a hole on a putting green. If you look at Old Iron that's been worked to flow 260 to 270, you'll never get that shape from one of these aluminum heads because the material is not there to begin with... and you start working underneath the Harden seat to get that Venturi shape and that's when the problems arise
Earlie A
Well-Known Member
This is a problem for sure. The Speedmaster head comes with a throat slightly over 90.5% and with a bad valve job. The only way to fix it is going to a larger valve which may not be needed. Throat on ProMaxx and AFR are about the same but at least the valve job is better.
B3422w5
Well-Known Member
Having seen a car swap from a trick flow to a bloomer head and pickup 2.5-3 tenths with zero other changes, I think the best bang for the buck is the Bloomers.
Yes they are more money than the trick flows, but for the difference in money you are gaining a lot more power that you would spend way more money on chasing than the difference in the heads cost. You will never get there with the trickflows( at least that I have heard about
And not that the trickflows aren’t nice heads, but with the bloomers there is zero doubt you can bolt them on and go, and they come setup for exactly the cam you intended to run.
Plus they will make more power if you upgrade your program down the road
PRH
Well-Known Member
Since the VJ on the AFR is fairly decent ootb, and they’re cnc bowl blended already……..the first thing I’d try is just rolling the SSR back a bit, and leaving the rest of it untouched.
That would be fairly painless work……that might nudge the big number up 3-6cfm from ootb.
On the ex side, just blend the bottom seat angle into the bowl a bit.
That would be fairly painless work……that might nudge the big number up 3-6cfm from ootb.
On the ex side, just blend the bottom seat angle into the bowl a bit.
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NC Engine Builder
Grumpy Old Man
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Downside is because the bloomer is a speedmaster casting, the rocker saddles probably need attention, and the geometry is DEFINITELY horrible without a correction kit. Both those things are a non-issue for trick flow in my opinion.
B3422w5
Well-Known Member
Same guy I mentioned having run both heads simply swapped his rockers onto the Bloomers and has had zero issues.
Neither is perfect obviously, better is who knows what.
I know I have Harland sharps, ran them on my Edelbrock heads a few years with no issues, swapped them onto the Bloomers, no issues either. Maybe I got lucky.
Casting quality wise, these heads I have now are WAY nicer than the eddies I had.
I can’t swear to it, but the shop that threw my junk together I don’t think messed with the saddles, or at least he didn’t mention it if he did.
Been on the car now 3 years, although this year kinda doesn’t count..lol, and it’s made some very solid laps
Would you use Bloomers for a 450 hp engine build ?
No doubt the Bloomer head is a good bang for the buck, probably one of the best
Last I checked I didn't see them in the catalog. It appears the Bloomer is special order.
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