The subject says it all. I was wondering if anyone knows how to accurately produce the results that a superram would produce on a 383 with a big cam. Is the sequintial FI close? It seems to be the closest of the five choices in terms of low rpm torque and the hp characteristics of the SR.

 

The closest numbers I've seen in Desktop Dyno for EFI motors involved using a single plane intake as the induction. One at least three engine combo's that were actually built , these came within less than 10 percent of actual numbers.


One thing to remember...when using a hydraulic roller cam in Desktop Dyno, the power gains are ABNORMALLY high. Simply use the real cam specs and change the cam type to flat tappet hydraulic for more realistic numbers.



HTH

 

Anybody else have any ideas? I tried the method mentioned above and it looks nothing like the torque cure of a superram car. So far using sequintial injection gives the most lowend torque and looks about right for a superramed car. Any other opinions?

 

On Desktop Dyno 2000 there is a choice for Tuned Port injection. If you choose the Sequential Fuel injection, the HP and TQ numbers will be much higher than they would in real life not to mention your rpm range is going to jump. I have played with the DD2k for a while and I am not sure there is much in the way of accuracy with the TPI and SR motors. I would do as the others suggest and try with a single or dual plane manifold to get closer to what you might really see. For Minirams and HSRs, you could choose the tunnel ram manifold, thats what I do...

 

I've tried single and dual plane intakes and they DO NOT look like big inch superramed cars dyno sheets. Look at Ski Dwn it's dyno sheet, the only way to get similar results on DD2K is to use sequintial inj. and you get a lot of lowend tq, which you don't with single/dual intake selections and the hp comes up to 540 at 5500rpm and Ski is making 430rwhp at 5200rpms. The sim. shows tq peaking at 566, which is short to Ski's real #'s, he's putting over 500tq to the wheels throughout most of his rpm band. I think that' pretty accurate at least for hp. I just wanted to know if anyone else had real #'s to compare to the simulation to see which intake selection best represents the S'perRam.

 

double post

 

camerojoe....

Can you send that to me? Thanks. I would like to compare it to actual

 

Dammit guys, how do I attatch a DD2000 file to a post here? Sorry Ski, I've been trying to attatch a pick of the dyno graph, but I can't seem to figure it out I e-mailed you the file also, but I don't know if you'll be able to open it. You may have to have the actual program? *shrugs*

 

Use Engine Analyzer. It has an option for SuperRam, MiniRam, you name it, it has it. It is also much more accurate than DD2000. At least it was for my car.

 

I have DD2000 not analyzer. All I want to know how to do is post a pic of DD2K on this board.

 

I use a program called KBDYNO. It is very inexpensive, but it seems to be much more accurate than others I've tried. With it, instead of choosing an induction or exhaust, you just enter intake/exhaust flow numbers. For instance on the intake you figure in the intake system for a total flow number. IE: about 180 for a stock TPI system, 230 or so for SuperRams on good heads, etc.

 

Alright, nobody else respond to this post unless you're going to answer my question, please. I don't give two skunk $hits about any other program except DD2K, cause that's what I have. I just want to know how do I transfer a pic from my DD2K program to this thread? Thanks.

Joe

 

I agree with you on the sequintial injection, it works best for me.
Actual numbers have been close. But the torque is more like what you would have at the rear wheels. (like on Kevin91z 419 rwtq) DD2000 said 422 tq. with sequintial.
I don't have a clue how to transfer a copy to here. Maybe print it, scan it and post it.
Don>>>

 

Thanks for your thoughts, Don. I'm glad to see I'm not the only one who thinks SI is close to what a heavily modded TPI (SR) would show. I don't have a scanner, but I'm trying to figure out if that's how other people get DD pics on here. Thanks though.

 

Some photo programs can do what is called a 'screen capture'. It turns whatever is currently shown on your screen into a .jpg or whatever that you can post as an attachment. Do a help index search on any photo program you have to see if it's capable.

 

Just hit the print screen button on your keyboard when the picutre is up on the screen. Then open up Paint. Hit the past command. Then save as .jpg file. Email it to me and will post it.

Or you can just attach it in the attach file button. I have never tried that, but I imagine it will work.

 

The files generated by this method are generally too big to attach. I have to upload them to my website & hotlink to them.

 

Like this:

 

Guys, DD2K is a program with the file type "GME" and you can't cut/paste or open it with any microsoft programs. I can't right click on any part of the dyno picture. I could get a picture on here if I had a scanner but I don't. I really don't know how it's possible to post a pic of DD2K without printing and scanning it. But I know I've seen people do it and I don't think they scanned their printouts, so now I'm starting to feel dumb.

Ski, to hell with trying to figure this out, I'll just type your numbers out.

RPM HP TQ
2000 180 474
2500 243 511
3000 306 535
3500 372 558
4000 427 560
4500 478 558
5000 513 539
5500 531 507
6000 524 458
6500 503 406

This is with 800cfm Sequential Inj, stock 190's, your exact cam specs, and large tube headers w/open exhaust, 11.8:1 comp., and these are obviously flywheel #'s. I hope this works.

 

Here's mine:
355ci
AFR190s
XE282HR Cam
Sequential-Fire injection
Solid Lifters (I'm running hydraulic rollers but everyone says to run solid in DD2000 for more accurate numbers) :shrug:
660 cfm

436 lb. ft @ 4500
448 hp @ 6000

YEAH RIGHT!

 

89ragtop, who said to use solid lifters? I don't care who said what, using roller lifters either hydralic or solid along with SI is the only way you can get close to actual#'s with superram engines. I put in a Lingenfelter 383 engine in like this, he advertises 440hp and I came up with like 437 hp with the 219 cam. How did you post that pic, of your combo in DD2K, can you describe to me in detail??? I've been trying to figure it out, but I'm kind of stupid with these darn computers. I only use them for school assignments, a few games, and the net once in awhile. Maybe I should take a few more computer programming classes during my last year in college.

 

Another couple of my impressions I have of DD2K. It's really compression sensitive. To make combos like the Lingenfelter 383 work, I usually bump the compression up about 1.5pt more than is used on his crate engine and I also use small or large tube headers with open exhaust, and I use at least 750cfm induction, because even a 52mm throttle body flows that. This gives me the best hp and tq curves for a tq heavy superram equipped engine. I know it may sound like bs, but it's the best I can do with this program. And yes use the roller lifter option, if you don't the results are wayy to low.

 

You can't use solid or roller you need to use Hyd-flat tappet.
With my combo, it yields 368 HP on DD2k. I took it to the dyno this week and it made 306 to the rear wheels....368x85%=312 I'd say that was darn close.

Another example:
Kevin91z's combo shows 378 HP his real dyno numbers are 318 to the rear wheels 378x85%=314 again real close.

 

Using a hydraulic instead of roller for a tpi car puts the tq way off. Roller does show about a 15-20hp adv over hydraulic, but the tq is more accurate for what a TPI would show. Overall using the roller option may be a little generous on hp but the tq figures are much more accurate. Maybe the roller option is only really accuate for showing the benefits of a solid roller not a hydraulic roller. But do as you like, I have my way, you have yours.

 

Allright, something i have a lot of interest in based off the fact that I've been trying to recreate the L98 engine in DD2000 based on the most accurate info I can get.

I did get it fairly close, but DD2000 ALWAYS seems to have this crazy amount of torque from 2,000rpm to 3,000rpm. It seems unrealistically high. Also, some of the cam specs seem off. Negative numbers and such, specifically EVC, and Valve Overlap. I used cam math to get most of those figures, it put all of the other settings in there. I just entered, valve lift, duration @.050, intake centerline, and lobe seperation.

 

Those numbers look close. I agree that DD2000 does go crazy with tq.

I was playing around with an idea for a blower motor. I used the custom centrifigual specs from ATI for a Dsc1. I didn't know about intercooler efficiency so I just guessed that the dual intercoolers might be 50% efficient.

Now with my engine specs, before the blower, DD2000 gave me a reasonable 412 HP and a very generous TQ of 487. Then with the blower the HP shot up to over 750!!!!

I don't believe that I will have 750 HP for a second when I get the blower, I would like 600HP, which the lads at ATI tell me should be attainable with tuning. Actually, 500+ would be plenty of power for my daily driver...

Just me experiences with DD2000