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Search found 1781 matches

by RevTheory
Wed Jul 08, 2020 7:25 pm
Forum: Engine Tech
Topic: Gen 1 SBC oil filter bypass
Replies: 22
Views: 681

Re: Gen 1 SBC oil filter bypass

What are the drawbacks, bursting the filter if the engine is revved too high before it's up to temp?
by RevTheory
Sat Jun 27, 2020 2:51 pm
Forum: Engine Tech
Topic: 400 SBC build
Replies: 74
Views: 2574

Re: 400 SBC build

Maybe, just maybe, he has seen too many crack and doesn’t want to be blamed when it all goes to junk. Quite likely the deal. Nearly everyone has a story of one that made 800 hp for years and one that split or Lord knows what at 500. I had a .060+ 350 that I couldn't keep cool to save my life at wel...
by RevTheory
Sat Jun 20, 2020 7:08 am
Forum: Engine Tech
Topic: Straight through mufflers
Replies: 88
Views: 3082

Re: Straight through mufflers

A crossover will really pull some snap out of loud mufflers.
by RevTheory
Mon Jun 15, 2020 1:06 pm
Forum: Engine Tech
Topic: Applying the DV 128 formula on a Supercharged engine
Replies: 211
Views: 3864

Re: Applying the DV 128 formula on a Supercharged engine

This is why SMW is simply the wrong guy for the job. He wants to turn a $300 problem on a $1200 engine in A $3000-$4000 car into a $45 million project requiring NASA type analysis. False ^^^^^ If you don't know what to do, call someone like Jones that does it for a living. Jones will use a physics ...
by RevTheory
Mon Jun 15, 2020 12:45 pm
Forum: Engine Tech
Topic: Applying the DV 128 formula on a Supercharged engine
Replies: 211
Views: 3864

Re: Applying the DV 128 formula on a Supercharged engine

This is why SMW is simply the wrong guy for the job. He wants to turn a $300 problem on a $1200 engine in A $3000-$4000 car into a $45 million project requiring NASA type analysis. Only to present computer-generated findings in a nice packet that only say that you can't get there from here and pret...
by RevTheory
Mon Jun 15, 2020 12:36 pm
Forum: Engine Tech
Topic: Applying the DV 128 formula on a Supercharged engine
Replies: 211
Views: 3864

Re: Applying the DV 128 formula on a Supercharged engine

If you narrow down the range of engines that 128 is supposed to be applicable to. What is the highest and lowest value that it returns? Is it right for all exhaust systems? Is it right for both automatic and manual? Is it right for all driving environments? Is it right for all driving abilities? Of...
by RevTheory
Sun Jun 14, 2020 2:42 pm
Forum: Engine Tech
Topic: Applying the DV 128 formula on a Supercharged engine
Replies: 211
Views: 3864

Re: Applying the DV 128 formula on a Supercharged engine

This kind of nonsense doesn't bother me anymore. It did a couple of years ago but now that I've accepted the fact that every forum has "that guy", I just giggle for the most part. It is what it is.
by RevTheory
Sun Jun 14, 2020 7:52 am
Forum: Engine Tech
Topic: Applying the DV 128 formula on a Supercharged engine
Replies: 211
Views: 3864

Re: Applying the DV 128 formula on a Supercharged engine

I'm pretty sure he just basically said, "hey, what about this?" noun plural noun: hypotheses a supposition or proposed explanation made on the basis of limited evidence as a starting point for further investigation. Well thanks for that, Webster; much appreciated! Changed my life forever. I've been...
by RevTheory
Sat Jun 13, 2020 2:07 pm
Forum: Engine Tech
Topic: Applying the DV 128 formula on a Supercharged engine
Replies: 211
Views: 3864

Re: Applying the DV 128 formula on a Supercharged engine

I'm pretty sure he just basically said, "hey, what about this?"
by RevTheory
Thu Jun 11, 2020 8:24 am
Forum: Engine Tech
Topic: Applying the DV 128 formula on a Supercharged engine
Replies: 211
Views: 3864

Re: Applying the DV 128 formula on a Supercharged engine

We did one for an 8.5:1 350 with a 2.02 intake valve and 8lbs. of boost a couple of years ago using 128. We simply added 10* (if I remember right) to the opening side of the exhaust so it ended up being a 111 LSA but we left it on a 104 ICL which is probably more akin to a nitrous-style grind. I'd i...
by RevTheory
Wed Jun 10, 2020 10:01 am
Forum: Engine Tech
Topic: Applying the DV 128 formula on a Supercharged engine
Replies: 211
Views: 3864

Re: Applying the DV 128 formula on a Supercharged engine

I wouldn't go trying to stuff that formula into a box it doesn't belong in. You may be able to get a little something out of it because I doubt that a 327 with a 2.02 valve and a 421 with a 2.055 valve will need the same standard-issue 112 but you'd really just be guessing.
by RevTheory
Tue Jun 02, 2020 2:14 pm
Forum: Engine Tech
Topic: Expected et change worth the cost of new AFRs in rail
Replies: 22
Views: 1011

Re: Expected et change worth the cost of new AFRs in rail

Does it go down the track with those stacks in the wind like that? Any way you can scoop it?
by RevTheory
Sat May 16, 2020 1:35 pm
Forum: Engine Tech
Topic: Tuning my new engine
Replies: 37
Views: 2356

Re: Tuning my new engine

16* initial timing and then hook up the manifold vacuum, as opposed to some crazy low initial timing plus vacuum that equals 16*, right?
by RevTheory
Sat May 16, 2020 8:05 am
Forum: Engine Tech
Topic: Tuning my new engine
Replies: 37
Views: 2356

Re: Tuning my new engine

12 to 15* max is probably about right for base timing. Getting the vacuum advance on manifold vacuum will definitely help pull any remaining snot out of it. Should be all carb settings from there.
by RevTheory
Fri May 15, 2020 6:22 am
Forum: Engine Tech
Topic: Anyone do a 406 to 421 SBC comparison? Results? Worth the change?
Replies: 6
Views: 894

Re: Anyone do a 406 to 421 SBC comparison? Results? Worth the change?

Assuming you turn the same rpm, will your heads be able to handle the increase? Cam change? Will you have piston-to-valve clearance problems now?