Don Terrill’s Speed-Talk

This one is $10,000 less than the ZZ632

https://www.shafiroff.com/chevy-pump-ga ... d-sr20.php

This one is 50 horsepower more and still $10,000 less

https://www.shafiroff.com/chevy-pump-ga ... d-sr20.php

I have been using beehive springs in my 331 small block Ford since 2006. They are the less stiff 26986 springs, but they control the valve train to well over 7,000. I recently changed heads and I reused the springs in the new heads after testing seat pressure and spring rate which essentially did no...

It's not about lifters, but over 20 years ago the first crankshaft I bought for my 331 small block Ford was a Cat from Speedomotive. When I got it I thought how rough it looked. The journals looked okay but the rest of the casting was rough. Anyhow, I used it for several years and in 2006 was at a r...

Unfortunately so many things are made in China now. Yet, you make it worse by buying them. The more we buy from foundries in China, the more foundries in the US, go out of business. I get it and I still hold that view as much as possible. Many of us have been saying this for many years, but the bus...

Not the same head, but I purchased Promaxx Maxx 180s for a SBF. They have 11/32 valves in them vs 8mm that the AFR Enforcer 185s had, but it didn't matter weight wise (~7 grams lighter) as my valvetrain could still be set up for 7000+ rpm with the springs I wanted to use. Quality wise, There was not...

I bought a few of the 1.28 lb Green "Lets Resin" mold making kits from Amazon earlier this year to mold some ports. It is 20A hardness and it worked very well. I used Vasoline as a mold release and a large screwdriver to help separate the silicone from the port and it slipped right out. I ...

That is all good information. Thanks. The engine is off the dyno and back home. Next stop for it is the vehicle. I have taken a peek or two at the newer ignition technology. Some thing I will certainly dive into down the road. The simulation would certainly be interesting to see. I can simulate it ...

Excellent numbers Nate! Good to hear that you got it running. I was curious on how it was going to do. Your timing blows me away. Those chambers must really be efficient. It makes me wonder if my timing should be adjusted with my new aluminum heads. I used to have the timing set to 36 total with the...

That's strange that the oil takes a while to come up to the top. I have a 2013 427 convertible and the titanium rods ate each other up at 45K miles and I had to have a new engine put in a few years ago. You hear about the valve guide wear issue but I have not experienced that. With lack of oil up to...

What kind of spring pressures would you need with 1.250 beehives on solid flat tappet turning 6800 244/244 .450 lift. Not enough information because I don't know valve train component weight and I don't know if your cam is a street grind or a more aggressive grind, but I have a solid lifter cam wit...

I'd be inclined to go with tri-y, even if the performance was the same you have more stunts you can pull with packaging and fabrication. Your header looks like it can use individual flanges, which means that you can assemble them in car one pipe at a time. With 4-1 each pipe will be 27" long, ...

I could use some help deciding between long tube tri-ys and longer tube 4-1s. That's going to be a sweet little motor and exhausts are always a fun project,but they aren't going to make it or break it. Might be just as wise to consider it from a packaging and heat point of view. Less radiant heat f...

i just now finished a bunch of different Software simulations and here's those results : i think your Rod Center-to-Center Length was wrong input ??? maybe should be = 5.515" C-C length ?? all 3 Simulations are showing basically same Results, the big-problem is this : all 3 are showing Engine ...

BLSTIC wrote: ↑Mon Jul 10, 2023 3:58 pm I'm surprised it's saying the same collector for both

2.5" is what i've got to work with. Pipemax is recommending a larger collector diameter of approximately 2.8" to 3.0".

I could use some help deciding between long tube tri-ys and longer tube 4-1s. As I posted earlier, I had Dougs Tri-ys on a 331 SBF. The engine has evolved over the years and most recently I put aluminum heads on it. They flow 277 intake and almost 200 exhaust. I took one tri-y off and cut the sectio...