Video of my Aussie 4v On the dyno!

Ok well i will first start with what i have done. I have an Oz 250 head with modified 4v intake. Larger valves, 3 angle valve job. Holley 8007(390cfm), Pacemaker headers from www.fordsixparts.com Y'ed into a single 2.25 exhaust flowing throuhg a cheap turbo muffler. The block has been bored .030 over. with stock cam. I have the 3 row raidator. 4 cylinder t5 transmission. I have an 8.1:1 compresssion ratio, Stock ingition and am running very rich.

Ok now that i have told you what i have here were my numbers:

105 RWHP
178 Ft-lbs of torque

I think these numbers will go up with a DSII system, MSD 6al(sitting in my garage) and a better tune of the carburator.

I will scan the graphs in probably monday!

kevin
 
yeah i was thinking that the 8.1:1 would be a great starting point for a 4v oz head turbo, t5 8inch setup
 
i was wondering what would happen with an aftermarket cam...
i think that would start to get good

but any engine that makes 70+ more ft-lbs than HP is alright in my book
sounds good man, what are your next plans
 
Racin' wif the big boys. Yeeeeeehhhooooooooo!

That is just a brillant result. I use the 1.264 rule for determining flywheel net hp.

There is 133 hp net @ 3200 rpm , 225 ft-lbs @ 2200 rpm. If that torque reading is not a flash reading, I predict there is 175 hp hiding there. The carb will give up to 155 hp as its jetted.


Hang in there. The the compression is what the compression is. The richness is all in a gas anaylser test and a check on the jet sizes, perhaps the way vlad did with his 390 on 300 combo. If its richer than 12.5:1 air/fuel at wide open throttle, its loosing hp. The high level of torque at low end indicates that the basics are all correct, and the rest is in the tuning!

Love it. Love 2V 200's, they look like a lot of fun. It sounds so gooooood!
 
We'll know what a cam does soon...mine is coming from the exhaust shop hopefully today. Here is what I have going:

390 4V (just like kstang)
9.5:1 CR
Comp Cam 260H
Pacemaker Dual outs
Flowmaster 50s, 2" exhaust.

I hope to have it this afternoon, and then I'll be tuning it up. Then, hopefully I'll be heading to a dyno to get the carb jetted right (I think it may be leaning out right now) by the end of the week.

Slade
 
dyno2.jpg
 
If that's the stock cam, it accounts for the low peak rpm for hp. Still, that's easily 30-35 hp over stock with just a head swap.

Install a 260 cam, bump the CR to about 9:1, install the DSII, and get the jetting right, and you'll probably easily find 30-40 more hp in that engine.

Good job!
 
yes that is a stock cam. I was thinking of adding a little forced induction into the equation(turbo), with my low compression ratio i bet that would be good. I also want to install A DSII and msd system. get it tuned up right. Now if i have heard that turbos like stock cam's is that true? If i were to go in that direction sould i change my cam out also, or maybe just some roller tip rockers? Just some thoughts

As for vacume, i am not sure, i will get back to you on that!

kevin
 
That stock cam may not be the best for a turbo, IMO. It simply peaks too low because of vavle timing. It has little or no overlap, and that's good for a turbo, but it also has no duration and no lift.

I'm not an expert on turbo cams, but I think that something with more lift, duration and a wide LSA to reduce overlap will push the peaks higher and allow more power to be developed.
 
I've been doing a little research on nitrous CAMS and apparently those would also work for a turbo or supercharged application, just like Mustang Six stated...higher lift, a wide lobe separation and dual pattern (more exhaust then intake duration) would work....you just don't wanna get carried away and get the biggest one that's available.

Alex
 
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