So, I just bought a 543...

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thesiren74 said:
My friend had his 543 dynod with stock unported 906's with a smallish cam 525hp and 625 lb-ft all in below 5,000 rpm.
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Interesting--the big question for me is--How does it drive? As in--Does it RPM willingly up to and over 5000 rpm ? Or does it takes its time to get there kinda thing? Honestly asking with that 522 RB build I've got going on. J.Rob
 
T-Fish said:
I called Hughes last week about that. He told me the porting would be $1,650. It makes more sense to me to use these heads, sell the E-Streets, and buy new TF 270 heads when they’re available. Out of pocket would be very similar and I’d still have the RPM heads to put back on my 440.
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That sounds like an excellent plan!
 
RAMM said:
Interesting--the big question for me is--How does it drive? As in--Does it RPM willingly up to and over 5000 rpm ? Or does it takes its time to get there kinda thing? Honestly asking with that 522 RB build I've got going on. J.Rob
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not a 543 , but my 505 revs fast and will hit the rev limiter before I can hit second gear if I`ve got my head in my ***, or fighting the wheel.
I just raised the limiter to 6250 from 6000, guess the solid roller has something todo w/ that , and the raised port heads ---------
Think it will go well beyond that too , but thats a lot of weight to swing around for a poor boy like me , even if it is as smooth as a babies but , because of the excellent race balance by Hughs.
 
famous bob said:
not a 543 , but my 505 revs fast and will hit the rev limiter before I can hit second gear if I`ve got my head in my ***, or fighting the wheel.
I just raised the limiter to 6250 from 6000, guess the solid roller has something todo w/ that , and the raised port heads ---------
Think it will go well beyond that too , but thats a lot of weight to swing around for a poor boy like me , even if it is as smooth as a babies but , because of the excellent race balance by Hughs.
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Another 1/4" in stroke from yours to a 543 is BIG difference and yes a solid roller cam and raised ports heads kinda changes things--Lol. J.Rob
 
I’ve dyno tested a few stock appearing 526’s(4.375x4.375) with exhaust manifolds on them.
Peak tq in the 42-4400 range, peak power in the 6000-6200 range.

They are very responsive, and will go to 7k without hesitation.

With the bias ply tires, they’re quite a handful on the street.

They have gone over 130mph in the 1/4 at 3900lbs on those tires.
 
Well, the engine is on the dyno. It runs, doesn’t leak, and will be run Monday morning to see what it has.

I ended up getting TF270 heads, Indy intake, and a billet Holley Dominator.
 
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Peak numbers for one pull were 716hp @5400 and 710tq (I forgot where that fell). That was without the spacer. With the spacer, we got 706hp @5700 and 701tq @5000. This was the better of the two power spreads by a long ways. It really wanted more fuel with the spacer, but unfortunately I didn’t have anything bigger for jets so that’s where it ended.
 
These headers didn’t do me any favors.

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T-Fish said:
Peak numbers for one pull were 716hp @5400 and 710tq (I forgot where that fell). That was without the spacer. With the spacer, we got 706hp @5700 and 701tq @5000. This was the better of the two power spreads by a long ways. It really wanted more fuel with the spacer, but unfortunately I didn’t have anything bigger for jets so that’s where it ended.
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Nice numbers, should make a fun ride
 
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