A day on the flow bench

[David Buschur]

Got the intake on the car. Wasn't too bad. Definetely not something for a production EVO. It would be in the way of a ton of stuff. The idea behind this was to gain some knowledge and I had really hoped to build a better intake manifold.

First here are the pictures of the intake manifold on the car:





After we got it installed we put the car on the dyno and ran the car at 30 psi first and then at 40 psi.

First dyno sheet is the comparison of the intake manifold we built against the stock ported intake. VERY small losses in the low/mid range, the smallest of any aftermarket intake manifold I have tested to date. That is a good thing! Another small loss around 6900 rpm, not sure what's up with that.

Stock intake made 613 whp/472 ft lbs at 30.06 peak boost.
The BR fabricated intake made 615 whp/474 ft lbs at a 29.75 peak boost.
If you look at the average power the fabricated intake edged out the stock intake.



This is the graph at high boost. As you will remember the V2 beat out the standard ported intake when the boost was turned up to 40 psi. Not so much the case with the intake we built.
V2 intake made 677 whp/543 ft lbs at 40.5 pounds.
The BR fabricated intake made 675 whp/535 ft lbs at 39.35 psi.
Again, if you look at the average power the fabricated intake edged out the V2.



I'm not certain what I learned here, I think it would take more testing to make sense of it all. The runner length on this intake is longer than all the fabricated intakes I have tested and it had by far the best low/mid range of all of them. The plenum is also smaller than all the fabricated intakes I have tested, again, low/mid range is excellent and the top end matches the V2.

I seem to see a pattern here with the longer runners/smaller plenum.

I am building another intake manifold. This next one is going to be freaking sweet and IF it does happen to work well it will be something we can offer/sell and it will fit excellent. Probably going to be a good 2 weeks before I get all the parts I need machined.

I don't feel to bad about the results to be honest. The intake performs better over the curve at 30 psi/600 whp and at 40 psi/700 whp. The low/mid range and top end are all as good as I have found.

I don't think I can justify building this and selling it though because when you get down to it the stock intake works darn good for $140. I think if I sold these for about what I have invested they would still be $600'ish.

[Black95awd]

At what point do you throw in the towel and call it quits?

If the ported stocker is working as well as it is, do you think you can improve with a new fabricated unit?

[2highpsi]

At what point do you throw in the towel and call it quits?

Never!

This is why they are the best

[Black95awd]

Never!

This is why they are the best

My point was that the ported stocker works very well. In order to sell another intake it has to perform quite a bit better and after all this testing, gains are marginal at best for some pretty expensive pieces.

So far it looks like the v2 is the best performing one for HP peaks, but at 1500 a pop, is it really worth it?

[David Buschur]

I'm not ready to quit yet, I'm just getting started learning what works. All these other intake builders have had years of building intake/making changes or expensive software and engineering degrees to do theirs.

I built this based on what I thought would work well and overall it has outperformed the ported stock intake and the V2. Worst case I leave it on my own car so I can run my own intake.

I do however have another idea, as I said. I'm pretty certain it is going to work well. I may run a few other intakes on the car too just to see if there have been any changes in product or some new products since last year.

I want the car to make over 700 whp with the response it has now on a regular basis. When that happens the car will surely run in the 8.60-8.70 range at 160+, still be driven anywhere and anytime I like, still have airbags, door beams and a full interior. That's the goal.

[blackout]

Nice results! Nothing wrong with that power at all.

[celica2evo]

Dave, I have a Magnus cast on the way. It should be here next week. We can test it against whatever you want on either your car, or mine.

Also, pulling the lines off the valve cover appears to have worked. The smoke from the exhaust has pretty much stopped. I just have to wait till its warm to get it inside and pull all the piping, clean it, and make sure it has stopped. So thanks for the help today!

[David Buschur]

I wish you had told me about the intake you were getting......last time you said you were not getting one. Now there will be two of them.

See what happens when you don't use BR parts on a BR built car? POS catch can you had! haha

[celica2evo]

I havent payed for it yet so I guess im not buying it! I told a guy on evoM i was going to pay for it tomorrow. So ill tell him im not going to. Im selling the V2 though. Some kid is supposed to pay me tonight.

I guess I wont have a manifold for a few days until we find out what works the best! So put me #1 on the list for whatever is the best! lol

And as soon as I get around the $250, Ill buy one of your catch cans. I was planning to, but just dont have the cash at the moment.

[David Buschur]

When you come by to get the brakes and such I can work out a special price on the can.

[celica2evo]

sweet man! Also, can you order the brakes new from Wilwood or is it only ams? I found a set that is used/new (bolted up and removed) but the guy wants as much as they are new for them. But ams has at least a 2 week. If you can Ill have you get me a set.

[SloRice]

It's February.....you planning on driving it soon???

[celica2evo]

hell, i had it out yesterday and today! lol

had the itch and still working on it to make sure the turbo is ok. i have to pull the intake off tomorrow and make sure there is still no shaft play.

[vwjeff]

I thought "FP" hooked you up on an 86?

This why I dont want there shit on my car. PT FTW

[celica2evo]

They did. The new one has maybe 15 miles on it. Only miles even over 5k rpms are the 3 dyno pulls for the tune.

So were going to see what it is, and they are either going to give me a new one or rebuild this one again. Without taking 6 weeks this time!

[GQ 05YellowEVO8]

Great stuff for the mind.

I think we need a dyno test to compare the power variation between the $150 Buschur unit and the $1600 Wilson unit

Only then can informed consumers make a comparison

On my dyno there was hardly any difference what so ever

Al

If thats the case I would be mad to spend the extra $1000+ on the Wilson manifold for nominal gains.

edit: I read thru the whole thread, what a lengthy read... thanks dave for all your testing

For now i will keep my 65mm BR ported T-body and BR ported intake mani.....

[David Buschur]

Today a customer brought by his JMF Drag intake manifold and asked me to flow test it. Very good results on the flow bench with the highest CFM flow of all the intakes I have tested so far. The intake was flowed with a 3" throttle body, all the rest were done with 65mm.

#1-335
#2-336
#3-330 (-1%)
#4-324 (-3%)
Total CFM 1325

Very well balanced, quality looked nice, it has 5-5/8" runners and a large plenum with raised velocity stacks in it. It will be interesting to get the car on the dyno, not my car, the customer who owns the intake.

[yellowevo42]

Thanks for posting this Dave. That customer was me , i asked Dave a few times to flow bench this for me. Something deep down told me that this product was the real deal. Always had the gut feeling, im glad he gave it a shot and gave me a shot. Im glad this did not wast his time and it performed just as i thought it would.

[farook]

Nice! Good to know that JMF performs as well as it looks, I'm still debating how well/equally my JMF street version will flow. Thanks to David for testing this for sure.

[steelcityevo]

Nice , good to see that the manifold is fairly equal across the runners. Now that you see what it does on a flow bench it is time to see what it translates to on the dyno/track!!!!!