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The 160 cfm heads made 1.91 hp per cfm on the 306 (306hp), 2.2 hp per cfm on the 333 (352hp) & 2.41 hp per cfm on the 393 (387hp). They all had different cams, got larger as displacement went up which would also be contributing factor. Be kind of like if we did a 318 vs 360 vs 408 with stock...

Would it be possible do an magnum block like this for LA Heads ? Looks fairly straightforward.

Just wondering if anyone knows anything about these PW SBM Head? I'm guessing there just someone else's head rebranded for Canada. Cad there $1,500 bare and $2,500 complete that's like $1,100-1,800 Usd, good thing is I can just pick them up locally. Don't like they flowed it on a 4.25" bore...

I'm wondering what would it take to make a pump gas 365 engine make about 526 lbs-ft @ 4,000 rpm and 514 hp @ 5,900 rpm basically a very similar power curve to the Trick Flow 408 in the dyno graph I'm using as a theoretical goal, doesn't have to use any of the same parts just probably make a...

...wrong, feel free to post. But I figured we'd start here with these. Induction Formulas Average_CSA = Port_Volume_CC / (Port_CenterLine_Length * 16.387) MIN CSA = (Bore x Bore x Stroke x RPM x .00353) / 613.8 (.55 MACH) Port_Volume_CC = Average_CSA * Port_CenterLine_Length * 16.387...

That's like your opinion man :) Maybe were looking from the same from you. It's not instance hp cause your not factoring in stroke or displacement depending on the eg.. This formula has nothing really to do with what were talking about lol.

Save the suspense, His answer is port velocity. At 20:00 he gives formulas for velocity, but they don't seem to work.

We generally speak like Low speed torque and driveability is synonyms with each other, I have myself but the more I think of it there seems to be a flaw with this line of thought. A lot of times when we see an upgrade that loses low speed torque the consensus seems driveability will suffer, but...

Which thermostat to go with a electric fan with 185/175 on/off temp sensor ? Do you want it more than the 185 fan ON like 190 thermostat or same or even just under ?

I bought the CVF V 70's + pulleys and brackets for my 380hp crate in a 68 Valiant, couldn't find the info on their site I'm guessing i need a 70's power steering hose ? And anyone know the belt sizes? i got the underdrive one.

Just curious what would you consider minimum acceptable torque in the 3500-4500 rpm range for a decent street machine ? What would you consider ideal torque in the 3500-4500 rpm range ? And is it possible to have too much torque ? I'm talking in the street not on a track.

The examples he give shows mid torque gains with going with a tighter lsa but was that really even in question ? But to me the gains aren't large enough to say it proves DV's formula, if anything it disproves it cause to me for the formula to be valid being a few degrees off of calculated lsa in...

I'm installing a holley sniper tank and efi, so I wondering anyone bought and used similar amazon hose kit and what was your experience ? Also want to install a regulator that will adjusts from carb to efi psi just incase I need to switch back and forth and anyone bought and used a similar...

...a somewhat decent velocity self rectify a little by rpm ? Pic I borrowed from Earlie A Average_CSA = Port_Volume_CC / (Port_CenterLine_Length * 16.387) MIN CSA = (Bore x Bore x Stroke x RPM x .00353) / 613.8 (.55 MACH) Port_Volume_CC = Average_CSA * Port_CenterLine_Length * 16.387...

What average target fps should you be shooting for and how much for different levels of builds like daily driver street to like pro stock? Is there kind of formula or guild or rule of thumb for target fps? So far mainly from Speier Racing Heads that he seem to target 310-350, he stated 350 fps...

A while ago I suggested to start a section that members could post links to their Videos and we could watch and talk about them, was suggested to me start it myself so this is basically what I'm doing. Members YouTube channel Forum section Any video I see that I find interesting I'll post here...

This came up on my feed thought might be interesting to some.

I think a forum section should be created where members can post links to their videos as they create them for us to view and comment.

Just wondering if people have time slip examples where switching to larger cams with less than ideal converter/gearing that may have increased overall E.T. but did it have a penalty,improvement,same in the 60'/330' times? Same question also switch for dual plane to single or any other mod that...

The 273 Build That Doesn't Suck Forget The Little Engine That Could. This Is The Little Engine That Does! WARNING: Reading this article might cause you to giggle uncontrollably with excitement. It might lead to sleepless nights and neglected work-hours spent planning your own 273 build. It might...

To me "Mopar Performance Issues" and "Mopar Racers Forum" should be at the top of "Mopar Technical Forum" and "Mopar General Discussions" should be where the racers forum is, Mopar Performance Issues don't get used much where it is and should be closer where performance discussions are. Just a...

Thoughts on this porters? Math on velocity, port size etc..

I figured the direction I want to go over the next 5+ years with my car 68 Valiant stock body & interior, I'm keeping it small block want to eventually go high to mid 11's want no roll bar or cage. Want decent streetability be able to go anywhere at anytime. Looking to make peak power around...

Here's a interesting Hemi swap :)

Cylinder Head Design - CHP How It Works "A larger valve diameter will almost always produce higher 0.100- to 0.200-inch flow figures, which can be counterproductive to making power. /// For race engines we use larger valves, but are able to reduce the 0.100- to 0.200-inch flow even further with...

I thought the general consensus was engines that were soft down low in the rpm band was a lack of torque. But I've been noticing that built engines of all type even high rpm still make decent power down low generally far better than a stock low power version of itself some on par or better than...

I'm deciding what tires to get for my car 68 Valiant Signet will have about 350 hp 5.9l Magnum, gonna have upgraded torsion bar leafs sway bars Viking double adjustable shocks Not looking for competition tires that got to be stored specially, car will be daily driver type summer may see some...