351w Dyno Results

[jikelly]

They had a Dyno test day at South Plains College in Leveland yesterday and I took my 73 stang out there to run. It made me kinda nervous to drive up on the ramp and do the run. I kept thinking the car was going to launch itself off. Anyway, I made 2 pulls but the first one didn't register correctly. They had to calibrate the coil signal.

My 2nd pull they started collecting data at 3000 rpm and I let the engine the engine rev to 5700, but according to the results it basically stopped making power at 5500.

Peak torque was 317 Ft-Lbs at 3100 RPM

Peak horse power was 248 at 4680

My engine combo is

351 roller short block from http://www.citymotorsupply.com/

Trick Flow cam http://store.summitracing.com/partde...0&autoview=sku

Duration at .50 221°/225°

Lift .499/.510 with 1.6 roller rockers

Separation 112°

early powerheads http://www.powerheads.com/sb289.html

Weind Stealth intake manifold

and a Carter/Edelbrock 750 carb .98 primamry jets with 101 secondaries

Do those number sound about right? I know I couldn't stop smiling all day.

 

[66Runt]

Sweet!
Darned good, and earnest numbers in my opinion.
Are you running an auto?

 

[D.Hearne]

How much was the roller 351 shortblock ? As ofr the numbers, I couldn't say, never done any dyno stuff.

 

[jikelly]

The transmission is a tremec 3550

 

[chromedog]

thats about the same combo i have, except the cam is a comp...i would say i run out of steam at a bit lower rpm, maybe 5300. ive built it more for torque, though, which peaks at about 3500. im also giving up a few ponies as i run thru an aod. what distributor are you using?

 

[bnickel]

that's not bad at all, should be around 310hp or so at the flywheel, maybe as much as 325hp, so definitely not bad for an off the shelf short block with only a cam and ported iron heads. i think you're probably still giving up a little compression with the stock late model pistons too, i'd guess you're right around 9.5:1 or less, probably less, so you have more there with a piston change later down the road if you need it.

 

[iskwezm]

i think thier low,my old 289 dynoed 305HP with cast iron heads.

 

[jikelly]

The short block is a 94 roller and cost like 650 with shipping. It would have been 250 less, but I didn't have a block to trade in as a core. Cheap huh? The compression ratio I figure is between 8 and 9:1 but that's just a guess.

The distributor is from a 69 or 70 351w. I bought it at Autozone. I went that way so I could keep my crane electronic ignition module thingy.

 

[C0V3R]

I have the same cam on a 302 with twisted wedge heads and made 247 rwhp.

Perhaps its the cam?

 

[D.Hearne]

The short block is a 94 roller and cost like 650 with shipping. It would have been 250 less, but I didn't have a block to trade in as a core. Cheap huh? The compression ratio I figure is between 8 and 9:1 but that's just a guess.

The distributor is from a 69 or 70 351w. I bought it at Autozone. I went that way so I could keep my crane electronic ignition module thingy.

I'm going to run to the local distributor for them, they sell the roller 5.0 short block for $430 here. I wasn't aware they had the roller 351's yet. I'll pick one up and hang onto it for a future build. I've used the roller 5.0 in a budget build already. Only thing I changed was the rod bolts, cam and timing set.

 

[bnickel]

I'm going to run to the local distributor for them, they sell the roller 5.0 short block for $430 here. I wasn't aware they had the roller 351's yet. I'll pick one up and hang onto it for a future build. I've used the roller 5.0 in a budget build already. Only thing I changed was the rod bolts, cam and timing set.

hey D, how bout a good ol boy discount for some of your stangnet buds?

 

[D.Hearne]

hey D, how bout a good ol boy discount for some of your stangnet buds?

Me? How come you didn't get together with jikelly and order two of those and get the 2 for 1 discount ? I mean, damn, aren't y'all neighbors? Hell his was less than I'd pay, after you figure the $250 core charge. And not to mention the sales tax too.

 

[bnickel]

Me? How come you didn't get together with jikelly and order two of those and get the 2 for 1 discount ? I mean, damn, aren't y'all neighbors? Hell his was less than I'd pay, after you figure the $250 core charge. And not to mention the sales tax too.

sorry i misread your sentence, where you said run TO the local distributor, i thought you said "run THE local local distributor" .........my bad, i thought if you were going to be running their local office, you could hook a brutha up, apparently it was just my wishful thinking. i actually have an uncle that works for AER in Dallas but they frown on employees getting their family discounts on stuff, so after the last seat of heads i got from him i decided it was best if i didn't ask again, don't want him to get in trouble, even though he's been working there for over 20 years, closer to 30 now i think.

 

[Z06killinSBF]

Good #'s. Now where are ya'll getting these cheap motors?

The low compression and that somewhat stout cam is killing you. Your losing compression with the cam. I would keep the cam and throw some good pistons in it. I've seen the 5.0 guys with decent heads make nice power with that cam.

 

[Edbert]

I have the same cam on a 302 with twisted wedge heads and made 247 rwhp.

Perhaps its the cam?

It is a torque-cam but the heads are the weak link compared to yours.

I think his torque figures are great, a little short on HP but 351Ws are know to be that way.

Just the opposite is true for the 289. They make HP all day but lack the grunt.

 

[D.Hearne]

Good #'s. Now where are ya'll getting these cheap motors?

I used to have it in my favorites list, but do a search for "City Motor Supply" Dallas Tx. and you'll find their website. These reman shortblocks aren't perfect, but you can't beat the prices. The Roller 5.0 I used needed the rod bolts changed and had the wrong roller for the application I spec'd plus an el-cheapo timing set, but the rest was "A-OK" Silvolite hypereutectic flat tops (might have been the 1.585 pin ones though, I don't recall) and the workmanship was OK too. I swapped the rod bolts for ARP's and the cam for a B303, topped it with ported E7's, a Ford A321 intake and beat on it for over a year (daily freeway blasts to 6500 rpms) Then swapped the heads and intake for Canfield's and a Vic Jr. Beat on it to 7500 rpms daily for four months till it split the #4 wall (1/2" long midway in the bore) The rotating assembly held up fine. Sold the pistons and rods to another. I've got the crank in a new budget junkyard build now. (don't know when this one will be finished though)

 

[Z06killinSBF]

I heard of City Motor when I used to live in Dallas. I think the is a better motor builder like them called USA Motors or something like that. Supposed to be pretty cheap. I think they are out of Garland, TX.