Since people sometimes wonder about the usefullness of lids, how well the SSRA system works, and especially if that seal for the airbox does any good, I decided to make runs with said things and then report results back to you. I'm going to compare these results stock runs so you can see the difference. For my modded runs, I'm only going to use times that had 60 fts close to the baseline times. Bad 60 ft times are driver error, and will obviuosly result in skewed times, only 60 ft times under 2.3 will be used, Also two runs with botched shifts are left out, for obvious reasons.

Ok, previous runs in my car completely stock in conditions like last night.
I had two good runs before that are here being averaged together for baseline purposes:
60 ft - 2.186
1/4 ET - 13.755
1/4 MPH - 104.37
I had other crappy runs on that night but they won't be used in comparison.

My initial runs of the night were made with TSP lid, and complete SSRA system. 10 total runs, 5 averaged.
Average 60 ft - 2.220
Average 1/4 ET - 13.519
Average 1/4 MPH - 105.72
Best run of this section was a 2.12 60', 13.314 @ 107.13

Ran out of gas, put in seal for airbox and got fuel. Let engine run for a bit in case it needed to learn how to breathe again(doubtful)
*At this point there will be approximately 2 gallons of gasoline more in the car as compared to previous section, if that matters to you so be it.

Runs made with TSP lid, SSRA system, and airbox seal.
7 total runs, 6 used.
Average 60 ft - 2.164
Average 1/4 Et - 13.45
Average MPH - 105.33
Best run of 2.155 60', 13.390 @ 106.14
These runs had a slightly faster ET, but this is almost identical the difference in 60 ft so that's where I attribute the time. Slightly slower in MPH but nothing conclusive.

Took the seal off, in my opinion the fact that there wasn't any difference in favor of the seal it should stay off, let the engine breathe from two places.
Runs made with TSP lid, SSRA system
16 runs total, 15 used
Average 60 ft - 2.25
Average 1/4 Et - 13.499
Average MPH - 106.444
Best run of 2.221 60', 13.439@107.15 mph.


TOTAL AVERAGE
Without Seal
60 - 2.243
ET - 13.504
MPH - 106.263

With Seal
60 - 2.164
ET - 13.45
MPH - 105.33

From there you can see the nearly 1 mph higher average MPH without the seal, I think that says whether it's effective or not. And more so than that, tI had 7 runs in the night of over 107 mph, and NONE of them were with the seal. The fastest seal time barely broke 106.

CONCLUSIONS
Everyone is still going to have their own opinion on the seal, this wasn't meant to prove anything, just give people some actual numbers to look at comparing the two methods next to each other instead of just opinion. I personally won't use the seal because I see the engine getting air from two places better than one, regardless of the vacuum effect, and the 1 mph difference speaks to me.

But to analyze the mods themselves, by adding the SSRA and TSP lid, I gained 0.42 in ET and 3 mph in my personal bests.

 

Very comprehensive experiment. Thanks!

 

I did this instead of studying for a Differential Equations test, it was a hard decision.

 

^
Careful, that will come back and bite ya. Took me 5 attempts to pass Calculus.

Anyhow, I have the SSRA also and have always wondered about the seal. Good to see some hard numbers.

 

IMO, I believe the difference in the averages of the 60 foots are still too far off for a fair comparison. get some drag radials, get your sixty foot dead consisitent and compare actual runs not the averages of a group of runs.

Still an A+ for effort

 

I didn't go to the track for the experiment but figured since I was already there might as well do some testing.

 

We need more posts like this...Thanks

 

you should do this test at the track. make a run with the lid/ ssra then take the ssra completely off and make a run, then make a run with the throttle body open. let us know

 

I think an SS will react differently than a Z28.

I think a Z28 w/SSRA would bennefit from the seal, but being a SS with the air scoop, it would not help to put in the seal. As shown.

Good test!

 

I'll try the seal thing when I go to the track on the 2nd...I'll have my FTRA with the SSRA addon scoop by then...I'm not taking the whole damn thing out though (at least I don't want to).

 

Agree with Top Fuel. 60ft's need to be more consistant for true comparison. But I agree with your thought process. I've never ran the seal with my setup. More air is better

 

yeah gains with an M6 sometimes can be hard to tell since their are alot of variables. I plan on purchasing a SSRA soon and posting the results.

 

agreed very good thread

 

if you just think about the theory behind it you would see that it is actually less air...

the ssra/ftra simulates an air compressor tank inside the lid with it properly sealed up...now put a hole in that tank (removing the front seal) and the pressure will be lower...so some of the air coming from the ssra/ftra is being lost out of the front slit...

as for the test it is a good effort but it cannot be certain that you shifted exactly at the same rpms for each pass and took the same amount of time during the shifts also...i am just looking at mph...

i like the tests shows your engineering background...which is what i am guess you are in like me taking calculus I, II, III, dif eq

some threads i did a long time ago you might think are interesting, kind of the same lines

https://ls1tech.com/forums/generatio...sults-tom.html

https://ls1tech.com/forums/advanced-...ng-around.html

 

I think another variable that you didn't think about is heat soak. You made alot of runs, and it sounds like there wasn't a consistent cool down between them. From my experience this could affect the time/ MPH pretty significantly..

 

Guys - this thread is OLD.

 

WAY old LOL

 

haha didnt even notice that...that is a 5 year gravedigger lol

 

What are we gonna dig up next? A group buy of Whisper lids from TByrne?

 

Lol I just assume that its not old when its at the top... guess I can't do that haha