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Search found 4920 matches

by GARY C
Tue Jun 30, 2020 10:27 pm
Forum: Engine Tech
Topic: EPA proves Drag Chevette WRONG
Replies: 31
Views: 5803

Re: EPA proves Drag Chevette WRONG

Not doubting your experience, but Matthew Brusstar at the EPA stated in this article http://www.epa.gov/OMS/presentations/gni-mjb-051303.pdf that ethanol has a higher laminar flame speed than gasoline. See the chart on page 9. I saw a disagreement between Pro Systems and a Sullens guy and I know th...
by GARY C
Tue Jun 30, 2020 10:13 pm
Forum: Engine Tech
Topic: SAM's SB2 At The EMC And The REC
Replies: 48
Views: 1987

Re: SAM's SB2 At The EMC And The REC

I'm curious, how much time would you budget for that test? (including record keeping and update of test plan, clean-up the cell etc.) Checking lash cold, hot, before and after pulls. At the pace and level of care a professional, not the fastest it can be done. Thats not what I do for a living, you ...
by GARY C
Tue Jun 30, 2020 9:27 pm
Forum: Engine Tech
Topic: SAM's SB2 At The EMC And The REC
Replies: 48
Views: 1987

Re: SAM's SB2 At The EMC And The REC

I may be mistaken but are you comparing the time spent to optimize all aspects of a single engine vs the time it takes to test a 1.5 rocker ratio vs a 1.6 rocker? I'm curious, how much time would you budget for that test? (including record keeping and update of test plan, clean-up the cell etc.) Ch...
by GARY C
Tue Jun 30, 2020 8:59 pm
Forum: Engine Tech
Topic: SAM's SB2 At The EMC And The REC
Replies: 48
Views: 1987

Re: SAM's SB2 At The EMC And The REC

How about 1 attempt, no dyno time before the competition. Your first Cam,lifter headers, oil pan etc is your only. Won't you just do it yourself there chief, since you're calling Dave out? Im not the only one to call him out.. go to yellowbullet where the avg person actually races or owns a shop.. ...
by GARY C
Fri Jun 26, 2020 6:42 pm
Forum: Engine Tech
Topic: Straight through mufflers
Replies: 88
Views: 3002

Re: Straight through mufflers

In car is probably very different then laying in the driveway behind it?
by GARY C
Fri Jun 19, 2020 11:52 pm
Forum: Engine Tech
Topic: Straight through mufflers
Replies: 88
Views: 3002

Re: Straight through mufflers

Let it breath... :)
by GARY C
Fri Jun 19, 2020 11:47 pm
Forum: Engine Tech
Topic: Exhaust Pan Evacuation on the Street
Replies: 17
Views: 472

Re: Exhaust Pan Evacuation on the Street

... it only looked like one side was pulling. It's pretty common for the check valves to flake out.. Yeah I think there is more good to be had with this system then has really been tested. I had about 2' of clear hose per side but could only see moister move on one, I tried tweaking the other side ...
by GARY C
Fri Jun 19, 2020 11:36 pm
Forum: Engine Tech
Topic: Exhaust Pan Evacuation on the Street
Replies: 17
Views: 472

Re: Exhaust Pan Evacuation on the Street

I ran them on this car with nitrous and a full exhaust system it had straight through Dyno Max mufflers, engine combos were 377, 382 and a 421... on the 377 they pulled enough to keep the rear main from leaking even though it only looked like one side was pulling. https://www.youtube.com/watch?v=6Rg...
by GARY C
Wed Jun 17, 2020 9:37 pm
Forum: Engine Tech
Topic: Pass-on 4 valve engine project
Replies: 28
Views: 1881

Re: Pass-on 4 valve engine project

Over the past 10 years or so, I have built some foundry tooling for a 4 valve cylinderhead for a 5.0@ bore spacing block. It requires a custom block to finish, a 4.9 bore spacing Ford or 5.0 bore spacing Cadillac are not compatible with the project. As part of the project, I also have a 5 axis CNC ...
by GARY C
Wed Jun 17, 2020 9:05 pm
Forum: Engine Tech
Topic: Applying the DV 128 formula on a Supercharged engine
Replies: 211
Views: 3789

Re: Applying the DV 128 formula on a Supercharged engine

If you do not like the DV 128 method thats ok. But you must prove it to convince me its wrong. If you don't like the DV 128 method for what It is intended for,, You may not like this method either... Ghats ok. But your car, your street supercharged engine and your budget does not care what you like...
by GARY C
Wed Jun 17, 2020 8:53 pm
Forum: Engine Tech
Topic: Applying the DV 128 formula on a Supercharged engine
Replies: 211
Views: 3789

Re: Applying the DV 128 formula on a Supercharged engine

I say there are basicly 3 big differences between the N/A engine and the supercharged engine in this class . 1. The induction side is now pressurized thus the mass air flow is increased. 2. The combustion pressure and temperature is higher now by effect of forcing more air and fuel IN under pressur...
by GARY C
Wed Jun 17, 2020 8:19 pm
Forum: Engine Tech
Topic: Applying the DV 128 formula on a Supercharged engine
Replies: 211
Views: 3789

Re: Applying the DV 128 formula on a Supercharged engine

Remember and note that it is using the DV 128 method BUT BUT with a tweek . That TWEEK is not rocket science and is the tweek that makes the BIG difference in the right area on these types of engines VS the very similar N/A version . The goal is the same as the goal of the DV 128 method intended go...
by GARY C
Wed Jun 17, 2020 8:12 pm
Forum: Engine Tech
Topic: Applying the DV 128 formula on a Supercharged engine
Replies: 211
Views: 3789

Re: Applying the DV 128 formula on a Supercharged engine

FBird wouldn't using DV's 128 for a supercharger be outside of what it's intended for? It could be done but it would only be guess work at best without test data to back the theory. Remember and note that it is using the DV 128 method BUT BUT with a tweek . That TWEEK is not rocket science and is t...
by GARY C
Wed Jun 17, 2020 7:45 pm
Forum: Engine Tech
Topic: Applying the DV 128 formula on a Supercharged engine
Replies: 211
Views: 3789

Re: Applying the DV 128 formula on a Supercharged engine

FBird wouldn't using DV's 128 for a supercharger be outside of what it's intended for?

It could be done but it would only be guess work at best without test data to back the theory.
by GARY C
Sun Jun 14, 2020 12:52 am
Forum: Engine Tech
Topic: Applying the DV 128 formula on a Supercharged engine
Replies: 211
Views: 3789

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. Kind of like this? Computer model definition A computer model is a computer program...