I know a few of you were interested in the track results of my ported Superram. I hesitated answering until I had some more racing under my belt to better determine the actual results.

My Base intake and Runners are ported, the Lid is not yet, however, after about 8 trips to the dragstrip, I've determined that I believe the ported SR has given me a solid 1 mph in trap speed. Maybe a bit more there after I port the lid within the coming week or two.

Today, with stock tires all the way around and my Flowtech mufflers corked up, I ran 117.50 mph in 75-80 degree weather. Typically I would run only 116 in 75-80 degree weather, and that is with the flowtech muffler bypass removed and skinnies on the front.

On front fatties and rear slicks, ran 11.67 @ 116.80.

This is with a mild 383.... not sure if the same improvement can be seen with a 350, on the flip side, I would guess a 406 or larger motor could see a bigger improvement than this...but all just guess work, seems every car reacts a bit differently.

Cheers,
Beach Bum

 

Beach... what do you mean porting the lid?:)

 

Scorp, I probably should have said plenum instead of lid, the plenum openings are considerably smaller than the runner entrance at the moment.

btw, anything new with your set-up ? I've been out of touch with the forum for a few months.

cheers,
Beach Bum

 

Ok gotcha! I didn't know if you were going to try something new like hollow out part of the lid to increase volume. :) My car has been down since November when #6 ingested a bolt. Weather has finally turned nice now so I can work on the car once I get some time. :)

 

Nice MPH there Beach!

Thanks for sharing that. :cheers:

 

Beach Bum is alive! :hurray:

 

Nice report Beach, that's still not your best ET, right ?

Vic

 

Beach nice comparison. Now you have me thinking. I am going to have to take a look at my website pictures again, and maybe you could too to see if you think maybe I should take more out of mine. I was thinking about removing that "web" between the runners, on just the plenum. Did you? Do you have any pictures? How does your port job compare to the one I did? I am looking for any little nudge that will help me get into the 10s. So your opinion would be greatly appreciated.

Again great work! Thanks. :cheers:

 

Hi Vic,

No, these are not my best et's, a 170 lb friend has run 11.48, and I have run 11.55 @ 116.99 and about 20 11.56-11.58's @ around 117 mph, however, those were on skinnies and in better air. If I had skinnies on yesterday and the air was better, I feel 11.4's @ 118 would have been possible yesterday with me in the seat..... I give credit to the extra potential to the porting of the Suoperram.

Ski, I will look at your pictures and reply later today.... gotta go, running late.

cheers,
Beach

 

Scorp, A bolt in the intake ??? Ouch... and I am not even going to ask.

Yeah and on the Plenum lid, haven't you tried to port it yet....by hollowing it out a bit more, you can expect gains of 30-40 hp with 4-5 tenths et improvement. :lol:

Ski, With my Superram, the base and runners are opened up considerably, a solid 1/4" to 3/8" is taken off on the diameter with a little extra on the short radius's. However, I have not matched the plenum itself to the runners yet, but will very soon. (need time, have none) I have not tried to siamese into the runners any, but Ralph did sometime ago and ended up re-welding the material back in after lost performance.... however, he has a 350 and to see the benefit he might have needed more cam or additional chip tuning or ??? Point is, every set-up seems to react differently, so maybe with your solid roller 406, siamesing the runners for a few inches may give you another 20 or 30 ponies..... dunno. But if you do, please let us know the results.

btw, whatever happened on the 1 3/4" vs 1 5/8" header test ?

cheers,
Beach Bum

 

Beach,

No not removing the runner web, but rather the plenum web, that little section they have that goes between the holes. In other words if you looked at the plenum you would only see 4 oval holes, rather than 8 littler ovals. Take a look at my site I have measurements etc. I think the runners were out to 2+inches on mine. I did all this stuff together and don't have anything to really compare too.

Also Corky had his professionally ported and he is convinced that he lost bottom end. We were talking last night and we think we should pull his back apart to make sure a gasket or something is not at fault, but that is what we found on his. But like you said every engine is different. I think in ours the velocity of the air is key to making good power/torque to pull the car through the traps.

The header test was done about 3 -4 weeks ago. You missed the results? WE posted them. Bottom like was taking DA in to account between runs he gained a solid .07 with my 1 3/4 headers. Not bad when you get to where we all are running. That is not an easy thing to pick up, as you already know.

I am heading to the Dyno this Wednesday, I will hopefully be able to mustar a little more power out of mine to get that .2 tenths I need for a 10.95, and keep me in the 10s for a while.

Good post again.

:cheers:


[Modified by ski_dwn_it, 2:25 PM 5/19/2003]

 

Beach,

Do you have any dimensions of the ports? How far in did you port? Any pictures?

:cheers:

 

Here are mine if it helps any....






These are the webs I was talking about.

 

Ski, mine is about the same as yours. My runners might be opened a little more than yours at the top. However the base enterance is the bottle neck. I too have a 1 3/4 dia there (i think it was 1 5/8 before porting), and you can't go much more. There's not much gasket area left on mine and i'm almost siamesed between the adjacent runners. And you want the intake track to gradually shrink as you move to the valve. I could take more off the roof of the base, but the area in the base would be greater than the entrance. I have a little more i could do, but not much. I'd need more cubes before i even try.

Can;t figure out why Corky didn't pick up some HP by porting the intake. Something aint right. Just the casting flash alone has to limit air flow and your 406s have to be hungry air.

 

Yeah I too would have thought that Corky's Pro port job would have sent him into the 10s.....I wanted to see what mine would do before shelling out 600 beans for a port job, glad I waited now.

Maybe our heads are the bottleneck now with only the 190 runner size, but $2k dollars to be a guine pig is gonna have to be someone other than me to try :D

I am off to do some dyno testing this Wednesday in Pittsburgh, then we will know for sure what this setup is capable of. Right now Corky and I am really just a shot in the dark with our tunes. I know my part throttle is dead nuts. I can lock the BLMs at 128 (no comp correction) and my WB stays right at 14.7 +/- .2 while in closed loop.

But WOT, neither one of us really know what AFR to shoot for to achieve best power. Wednesday should explain a lot and hopefully I can squeek another 25-30 hps out of it. That I think should be enough to put me over the edge pretty consistantly. But who knows.

Sorry Beach to the high jack, but I know that both you and Ralph are intested in Corky and my setups. :cheers:

 

Ski Down,

Great header test you guys did.... thats hot rodding in its purest form. I'm not surprised by the .07 gain on a 406....which on a low 11 second car is probably in the neighborhood of 10-12 hp, which is great.

Look forward to hearing your dyno results, are you going to dyno with the converter locked or unlocked ? Its not a Mustang dyno is it ? Really looking forward to seeing where your peaks are at. How far up in the rpm band are you going to run the test ?

I am surprised Corky didn't pick-up any power with the ported SR too.... no explanation from me, except maybe you guys are finding there is a different bottleneck than the intake, which is surprising in itself.

Hi Holeshot,

Sorry no dimensions or pics, the intake is ported right down to the head. Hows your set-up coming ? Anything new ?

cheers,
Beach Bum

 

Beach,

Yeah guess the converter is gonna lock at some point in the run, since my converter in 3rd locks at ~79 MPH on the strip......WHY?

Also Yeah its a dyno mustang....you sound concerned, should I be?
Here is the website for the place..... http://www.speednation.com/dynoday.htm

I plan on putting the vipers with out to lunch on the N/A engines catagory, on the Wall of Fame, and just about every other car that is registered there for that matter :reddevil :D

Probably take it up to 6000 and see what happens. I am not going to push it unless the power looks like its still steadily climbing.........That is what I want to see too, as I said in my new update post, I overshifted 1st gear and got a new best 1/8 mile MPH of 97.40, so maybe I am short shifting it at 5300....as I also said I am still learning what this thing likes and I'm starting to think that maybe runs a little different than Corky's with the tune and all. Guess this will answer some questions.

I am just VERY worried about hammering on this thing, the dynos just seem to pound them soooooooo much more than the track. The day after I left the last one I lost a tranny :rolleyes: Any advice to have a successful tuning/dyno run? The guy said if I am pushing that much power, to turn the times I am, that I should probably leave the slicks on it, because he has seen cars slip on the rollers. I think that is what was happening to Corky's Dyno results of only 377 hp. If that is all the more mine puts out, I give up trying to figure out HP to ET correlations.

My guess is that it will put out 424-434 RWHP, and 500+ torque. :smash:

 

Pushing that much power out on a dyno is scary, theres no kind of resistance. When I had mine dynoed, another vette owner (with a heavily modded LT1) came up to me and said that he'd seen a couple cars blow the rear tires on the rollers. He reminded me that a Z-rated tire is only rated to 150+, no real number is specified

 

You can run a lock-up swtich to control your lock-up either to a solenoid at the tranny housing or you can jumper a couple of pins at the ADL connector... don't remember which two at the moment, have it written somewhere. As you may know, you will have substantially more HP shown with the converter locked vs unlocked, and your torque curve will be more accurate. However, when calculating your flywheel HP, you should base it only 12% give or bit in losses vs 15 to 20% with the converter unlocked.

If your converter is locked, I think you will make 420 rwhp, with it unlocked, probably only 390-400 rwhp based upon your 123 traps. Mine with 117 traps was 362 rwhp, however that was with the converter unlocked, locked would have shown 380ish is my guess.

Mustang Dyno's are flaky per my experience and others.... thats all I will say.

Have fun, and look forward to hearing the results.

cheers,
Beach Bum


[Modified by Beach Bum, 9:27 PM 5/19/2003]

 

Z is rated for 150+ sustained speeds they can go well over for spurts. You could travel along at 150 all day if you wanted to. You have to be making SERIOUS power to blow the tires away on the rollers unless the operators do not have you strapped down properly.