[PAUL K]

Originally Posted by Dragncar

No people, a one inch open spacer is not a 1 inch open spacer. Did anyone watch the videos ?
This spacer right here is a type of a 1 inch open spacer. And it made almost 30 ft lbs more torque than another spacer.
Myself, I took my 1" Super Sucker of my old 455 HO. It had a Warrior. I have tested a few intakes and carbs at the drag strip. When I put my old Moroso plastic 1" open spacer I lost most of a tenth in ET and it was aluminum. Did nothing for the heat transfer.
This Polymer Racing 1" spacer made the extra torque upside down in the tests.

If a part works better when installed upside down I'm thinking it's a bass ackwards design.

Spacers need to be track tested. No dyno in the world can simulate the car moving down the track.

With one of my cars when it ran right around 11.0 it worked best with a four hole tapered spacer. It slowed down with a square open spacer. Later on when the power increased and the car ran in the 10.7 range the square open spacer was faster that the tapered four hole. The gains and losses were around .05-.07. This was using a ported T2

[Dragncar]

Originally Posted by PAUL K

If a part works better when installed upside down I'm thinking it's a bass ackwards design.

Spacers need to be track tested. No dyno in the world can simulate the car moving down the track.

With one of my cars when it ran right around 11.0 it worked best with a four hole tapered spacer. It slowed down with a square open spacer. Later on when the power increased and the car ran in the 10.7 range the square open spacer was faster that the tapered four hole. The gains and losses were around .05-.07. This was using a ported T2

Well, I have 2 of those polymer Racing spacers. A 1" tapered 4150 and a 2" 4500.
I am going to buy that 4150 in the video and try it both ways at the track.
See what happens. I kinda enjoy playing around with this stuff.

[Formulajones]

I've seen the spacers with the dimples before, they've been around a while. Same principle and reason golf balls have dimples. I've never tried one though.

I'd be interested in experimenting with one, just haven't gotten around to it.

As far as spacers go on single plane intakes, both on the dyno and at the track, I've always had best luck with the 4 hole taper spacers, super suckers, what ever you want to call them. They've worked and provide gains on everything I've tried them on from little 327's to larger 570+ CI engines as long as I was running a single plane intake. I usually run the 1.5" or 2" version.

I've never had any luck with them on a dual plane intake. In those instances I find gains with open spacers.

Either way they are worth spending a little money on different designs and experimenting. Very easy to swap around on the dyno and at the track.

[242177P]

Originally Posted by PAUL K

No dyno in the world can simulate the car moving down the track.

Depends on the track? This Porsche dyno does an
impressive job of simulating a lap at Nurburgring

https://www.youtube.com/watch?v=mfuleS9rnzc

[MatthewKlein]

Originally Posted by 242177P

Depends on the track? This Porsche dyno does an
impressive job of simulating a lap at Nurburgring

https://www.youtube.com/watch?v=mfuleS9rnzc

Didn't Ford use a dyno to simulate laps at LeMans in the 60s

[PAUL K]

Originally Posted by 242177P

Depends on the track? This Porsche dyno does an
impressive job of simulating a lap at Nurburgring

https://www.youtube.com/watch?v=mfuleS9rnzc

Wow that's cool ..... I wonder what carb spacer they found worked best


And I noticed they didn't use a salad bowl, I guess they're still learning

[Dragncar]

Originally Posted by PAUL K

If a part works better when installed upside down I'm thinking it's a bass ackwards design.

Spacers need to be track tested. No dyno in the world can simulate the car moving down the track.

With one of my cars when it ran right around 11.0 it worked best with a four hole tapered spacer. It slowed down with a square open spacer. Later on when the power increased and the car ran in the 10.7 range the square open spacer was faster that the tapered four hole. The gains and losses were around .05-.07. This was using a ported T2

Paul, in watching Erics videos on spacers There are 3 that he said to work the best. The tapered HVC 4 hole 4500 to 4150 open 2" spacer was worth 20 HP on all engines. The best one until PRP made their version of that spacer and his test shown it to be even better.
Going to buy that thing.
And that hybrid open spacer that made 20 something lbs torque over everything else had something in common when upside down with the above spacer. They tapper down, get smaller before the air stream hits the top of the plenum.
Venturi effect maybe ? Speeding the air up ?
https://www.youtube.com/watch?v=Ep-xgVJlE78&t=582s