dynod my 406 sbc

[hjallle123]

4.125 borr
3.80 stroke
brodix heads 18 degree
ross piston 14.5 comp
hogan intake 2 850 demon v´carburators
dart block 9.025
bullet cam 284 292 @ 0.50
765 lift in 731 exh

corrected torque and horsepower


engine spd rpm torque horspower
4700 510 456
4800 505 462
4900 515 481
5000 517 492
5100 523 508
5200 529 523
5300 538 543
5400 535 551
5600 560 597

5700 566 614
5800 573 633
5900 578 650
6000 582 665
6100 578 672
6200 584 690
6300 574 689
6400 577 704
6500 575 712
6600 567 712
6700 567 724
6800 567 735
6900 567 745
7000 561 748
7100 561 759
7200 547 750
7300 543 755
7400 538 759
7500 538 769
7600 538 759
7700 518 759

[mag2555]

Congrats!

Great power and a wide even torque band!

It looks like what I would expect from a well thought out combo!
Is the car set up to hook it all?

[joespanova]

I 'd be very happy with that.
I'd like to see numbers close to that with my ( yet to be built ) 406 , but I'll have std low port 23 degree heads.
My 377 is probably close to 680ish , but that same 377 is growing to a 406 over the winter. 4.155 bore / 3.75 stroke.

[kimosabi]

That's a real nice engine. What are you racing or, are you in street week 2018?

[hjallle123]

magg 2555 yes i have full tube chassie

kimosabi im going to race in a class 5.50 here in sweden

[F-BIRD'88]

Nice job. We got very similar/same numbers on the Brodix 18X headed 406 SBC from years ago.
Quite a bit of work done on the heads, thou, then. They had just come out with the 18x.
This 406 engine was built for nitrous so the compression was not as high.
Ran on Methanol. Nitrous side ran on 114 gasoline. Made over 1300HP sprayed.

Now AFR has 23deg raised port heads that can equal that.

Again nice job.

[Frankshaft]

One thing is for sure, the dyno isn't happy. It should run fast for the power level. Nice piece. I would run a 6800-7000 converter in the thing, maybe more, as loose as 7200. Shift it at 8200. With the appropriate gear. That will need to be determined by tire size, projected mph, etc.

[hjallle123]

What do you men about the dyno isnt happy ?

[hjallle123]

have a coan 7 inch converter about 7500 stall

32 "14"15 tyres in a 2600 lbs fulltube chassie with 5.67 in rear axle

only 1/8 mile race

what are you folks thinking abut that setup

more or less rear ? more or less stall ?


thanks

i run engine and car before dyno with wrong jets and timing 30 degree timing and the car went 5.68 5,72 and 60 feet 1.28-1.32
121-122 mph

this is a verry god track at sealevel

thanks

[af2]

One thing is for sure, the dyno isn't happy. It should run fast for the power level. Nice piece. I would run a 6800-7000 converter in the thing, maybe more, as loose as 7200. Shift it at 8200. With the appropriate gear. That will need to be determined by tire size, projected mph, etc.

True!!!

[hjallle123]

whats meaning the dyno isnt happy?

[F-BIRD'88]

Dyno power result is not inflated.

Look on your dyno sheet printout find the weather data
and correction factor applied.

[user-17438]

What do you men about the dyno isnt happy ?

That's a realistic number.

[hjallle123]

ok thanks

[MadBill]

Just to be sure the 'happy dyno' meaning is clear: to make the customer happy, unscrupulous dyno operators may enter incorrect atmospheric data such as higher temperature and/or lower barometric pressure than actual, which results in bigger 'corrected' power values. One big clue is if a low altitude dyno sheet in a cool part of the world shows a large correction factor, say 6-10% or even more.