 |
 |
 |
|
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
|
Go | New | Find | Notify | Tools | Reply | |
| MFI pressure | Login/Join |
DRR Sportsman |
Not sure how that would work since you are at 79% which is 568 degrees of rotation or 13.2 MS @7000 rpm. You are putting most of the fuel on the intake valve. I don't know where your "end of squirt" setting is, but, on the one engine we tried this on, we found a little power by moving the EOS to max intake valve opening. Might want to move it around 10 degrees at a time and see what the results are. Joe Without data, you’re just another guy with an opinion. | |||
|
| DRR Pro |
Special Ed, no worries about your delusional ramblings about what my car runs. I posted the slip below & will bump the post for your memory. As for the Spring Fling I've missed 3 races & the last one was for a family emergency. Car wasn't broke or "blown up" as you stated. As for round wins at the Fling, I've won more rounds than YOU at a Fling. My car was on the track in May & posted on DRR. Continue on with your BS, we are  at YOU!This was posted in Jan. 2023, you're lacking in comprehension as usual & you read everything I post!  2BKING  1980 Camaro Taking the Best Working Small Tire Shyt Box & making it Greater Than Before! 3000 lbs. Pump Gas 436 | |||
|
| DRR Elite |
 about your procharged POS, it's TURD nor your delusions about round wins. | |||
|
| DRR Top Comp |
 You care so badly it's hilarious..... Dave F J B | |||
|
| DRR Pro |
Oh, but YOU do! You keep bringing it up. 2BKING 1980 Camaro Taking the Best Working Small Tire Shyt Box & making it Greater Than Before! 3000 lbs. Pump Gas 436 | |||
|
| DRR Sportsman |
Scratching my head wondering when I had an interaction with Tracey Dennis..... As far as burning a piston on the dyno, 1320 is right I did on the 615 20 degree motor first day on the dyno. 3rd pull, burned #5 cylinder between rings. The cause was not fuel/timing/tune up related nor was it assembly related. I was having trouble circulating water in the motor on the dyno. Attempted to get cool water supplied to the heads not the block to mimic how I have it done in the car. Hot spot in the head and detonation led to piston burning. Lesson learned. On the return trip to the dyno we ran the same tune up (timing and pills) and many more (rich/lean, more timing/less timing) 20+ pulls with no issue. Motor has 300+ passes in the car now no reliability issues. FWIW it runs within a few hundredths +/- of a couple similar 20 degree 615s on gasoline in 4 link dragsters around my area. Using those cars same track same day, its not far off the mark sometimes faster sometimes slower but never more than 0.05 either way. Seem to me most/all the guys out there really flying with 20 degree NA motors in dragsters have BIG cams, many are aluminum block light weight combos. Not the case in my setup 890 lift and 2050lbs iron block tall deck 4 link miller. The point in all this was to share some fuel PSI data that I gathered during the testing. Nothing more nothing less.... I don't have to be the expert here i know there are plenty of folks out there who have been there and done that. I do struggle to find anyone running MFI on 20 degree motors, if they are out there I haven't heard from them yet...... | |||
|
DRR Sportsman |
Just curious, why would you make 20 plus pulls on the dyno.  Worlds Quickest And Fastest 71 Cutlass On The Planet Earth | |||
|
| DRR Top Comp |
When I had my shop I had customers put 20-25 hits on the dyno....I guess they paid for a day on the dyno they wanted all the pulls they could get. Especially the Comp guys....they wanted every horsepower there was to be had..... . Dave F J B | |||
|
| DRR Trophy |
Some good info here. I have always wondered about the methanol stacking behind the intake valve with MFI. Thats why I think a HOT head flashes it off to a gaseous state. I see that the EFI guys control this using injector phasing, which is interesting. | |||
|
| DRR Sportsman |
I get the Comp guys will look for every bit of HP but for a bracket engine, if you cant tune an engine in 3-4 pulls, you have a problem. I know some dyno operators will do 10 plus pulls on a bracket engine just because the guy is paying for the day. No need to wear the engine out on the dyno. Sometimes i do 2 engines in one day and still have time to do a 3rd one or at least get started on it. Worlds Quickest And Fastest 71 Cutlass On The Planet Earth | |||
|
| DRR Sportsman |
Primary reason for 20 or so pulls is to isolate each change to verify results. Make 1 change to the tune up per test. All depends on how complicated the setup is, if you know what it needs you can zero in pretty quickly likely only need 5-6 pulls or so to get things right assuming you don't want to learn/test much about the combo. Don't change much and you can get it done in 3 pulls. Carburetors usually 5 or 6 pulls and done. Injection just gives you more variables to adjust assuming you are willing to entertain them. H/S lean out RPM and H/S pill size. Oil temp high/low, engine water temp high/low. The motor in question here i actually dyno'd the first 5 pulls on a gasoline 1450 carburetor, then swapped to the methanol injection so that added to the total. Lastly its a bracket motor, not like i'm counting passes so if i think of a change and want to try it and dyno operator is down for the test then why not? FWIW it made 1060 and 860 on gasoline and 1090/905 injected on methanol. | |||
|
| DRR Elite |
and despite the 30HP difference, it will run quicker and faster down the track on gas and just as consistent. Ask racerdude2054. Him and his dad didn't believe me until they switched to gas after running alky and swearing by it for years. Now it's been years since they've run alky! https://drr.infopop.cc/eve/foru...912/m/4307068796/p/1This message has been edited. Last edited by: 1320racer, | |||
|
| DRR Sportsman |
1320 I disagree, but I'm not getting into an argument over it. Methanol carburetor is one thing, injection is another. Been there done all three options (gas carb, methanol carb, injection) in my experience injection has been the fastest/most consistent. There are tons of factors at play in this conversation. Converter is the biggest one, but we could go on for days on converters alone. | |||
|
| DRR Elite |
Nor am I, your slow car, your $, your time. | |||
|
DRR Top Comp |
Edna still trying to have last word regardless of it having nothing to add to thread. Seems different scares edna. America home of free. Brought to you by 2nd amendment. | |||
|
| DRR Elite |
Again, MFI is NOT used by 99.9% of bracket racers a carburetor is and a distant 2nd choice is Ron's Terminator. TRUTH and FACTS! But again, you are not a bracket racer nor is your POS FED a bracket car and this is thread is just another of the many
posted by you! | |||
|
| DRR Top Comp |
again you know nothing about it and have no reason to post except to show what little bytch you are. That is the one thing you do well. We all know different scares you because you know nothing about it. Bye now don't come back you hear? America home of free. Brought to you by 2nd amendment. | |||
|
| DRR Elite |
using you own words...
this ain't the forum for you, an illiterate idiot redneck who is not a bracket racer, who's POS FED is not a bracket car and who can not assemble and install anything on his shytbox without it failing or not working properly. Your junk hasn't gotten off the starting line under power! | |||
|
| DRR Sportsman |
I'd say actual MFI users are closer to 5% but that depends heavily on where you race. In brackets around my area I'd say 5% is a closer estimate than 0.1%. If you take 100 entries and there's 1 person on MFI that's 1%. That doesn't mean one is better than the other, just means the majority of people use carburetors. | |||
|
| DRR Elite |
of course it means a carb is better than MFI for consistency, predictability and tunability for bracket racing. | |||
|
| Powered by Social Strata | Page 1 2 3 4 5 |
 | Please Wait. Your request is being processed... |
|
 |
 |
 |
 |
