Dyno Charts Thread

[twin turbo]

Beautiful engine Bob!

[AL427SBF]

I actually was thinking of SS mesh, they're already out there for oil filters. I looked at Pierce Manifolds and couldn't find the $200 unit, only a cheapy that uses foam housed in mesh.

[bobcowan]

Here ya go, in the IDA section: Weber DCO, 48 IDA Air Filter<br><font color="red">99217.275</font>

[AL427SBF]

Thanks Bob, you got me thinking about doing something similar with a single plane 4BBL setup.
Meaning 15" x 2" or 3" oval SS mesh filter - nothing found yet.

[tcrist]

If you can or want to make your own you can get the wire thru McMaster-Carr, McMaster-Carr

[AL427SBF]

Not a bad idea, looks like something easily enough done, thanks.

[tbirdz12]

331 DSS short block
7 Qt Canton oil pan
Std volume oil pump
AFR 205 heads
Vic Jr intake
Big solid Roller cam (.622 254* 107)
10.4 CR
Mighty Demon 750 79P/88S
MSD Digital 6 Plus Ing, Dist, Coil
150 GPM Holley electric pump,
Spal Electric fan
Griffin Racing radiator
1-5/8" Hooker Supercomp Header
Electric cutouts
H pipe
2.5" exhaust
Hooker Aerochamber muffs with dumps before the rear axle

Theres still a few more ponies in there with more rpms, more jet and electric waterpump.

[vector1]

Originally Posted by AL427SBF

Thanks Bob, you got me thinking about doing something similar with a single plane 4BBL setup.
Meaning 15" x 2" or 3" oval SS mesh filter - nothing found yet.

i have a billet oval piece for single 4 bbl i will sell you cheap if you want to play with the idea.

[AL427SBF]

tbirdz12 - that's the slope for HP and Torque I'll be looking for, just a little more with the 427w but the power band is sweet.

vector1 - thanks, I also have one I can play with. Can also go with something entirely different with what's out there in after market. I'll wait to see what the dyno tells me when the time comes and go from there.

[Jerry Clayton]

If you are going to make your choice by what a dyno tells you---you need to go prepared---haqve every style air cleaner/filter that you can and do a b a tests-----I have seen many times an 8 hp change just with a different base plate on the carb

[AL427SBF]

Originally Posted by Jerry Clayton

If you are going to make your choice by what a dyno tells you---you need to go prepared---haqve every style air cleaner/filter that you can and do a b a tests-----I have seen many times an 8 hp change just with a different base plate on the carb

Oh yeah, the speed shop I'm going to has a lot of that stuff including various spacers ... but check my logic on this -


Once on the chassis dyno, do a couple of mild pulls with no air cleaner, dial in carb based on Ox sensor data.


Do a full pull, maybe two (again no air cleaner) and see where it all lands.
If the HP & Torque are basically where I want them, I would consider this the "goal" to strive for. If not, stop right there - time to consider a carb change or porting.


If a go, then try various buttoned up carb configs to get as close to the goal as possible.

... makes sense?

[Jerry Clayton]

I won't try to tell you what to tell the dyno shop----its in there hands--

But at least put an air cleaner base plate on the carb----------smoothes the transision air into the carb throat

[AL427SBF]

Agree, the dyno techs will run the show - I've talked to them and they have said as much about trying different setups depending on what we see. Running open carb just an idea I'll bounce off them, they may other plans entirely.

[itstock]

It's a dynocom, so I figure a bit higher than a dynojet in tq, should be close for hp. The hp is on the left, tq on the right (reason for not crossing at 5250)

[jhirasak]

302 HO block DSS prepared with main support and windage tray
331 cu. in. (3.25 stroke X 4.030 bore)
10 to 1 forged flat top pistons
165 AFR heads ( In. 1.90/ Ex. 1.60 valves; 61cc combustion chamber; 1.550" dual springs, titanium retainers)
1.6:1 ratio aluminum roller rockers
Comp Cam XE282HR (In. 232 duration @ 0.050/.565 lift; Ex. 240 duration @ 0.050/ .574 lift; lobe separation angle 112 degrees; hydraulic roller lifters)
Performer Air Gap dual plane intake manifold
715 Holly carb with vacuum secondary and QF metering blocks
Ford dual point dist. with Pertronics II module (16 deg. initial, 36 deg. total at 3000 rpm) and steel drive gear
8 quart Canton pan
2 quart Accusump (pre-start oiler)
High Volume oil pump with ARP driveshaft
Oil cooler
Shelby Tri-Y headers
X-pipe crossover
2.5 in. exhaust and tailpipes

the AFR 165 heads were from my previous 289 engine with TRW popup forged pistons and 305 deg duration solid lifter cam; rods were bent when standard Felpro intake manifold gasket failed and filled #8 cylinder with water while running; now using steel core intake gasket to avoid repeat of intake gasket failure problem.

Current performance with small intake heads (165cc) shows that AFR heads really flow well; if expense were not an issue, I would prefer to have AFR 185 or AFR 205 heads with this 331 engine. A good example of what larger intake heads would produce is shown in the post by tbirdz12 who had AFR 205's on his engine.

As a comparison, an earlier setup using a SMS-2 Shelby hi-rise dual plane manifold and a Ford Racing 397-M-6250-X-303 cam (224 duration @ 0.050/ .542" lift) produced 325 RWHP. It just goes to show how the right combination of components can produce a nice normally aspirated engine.