A day that turned into a week, on the flow bench.
The cross sectional area of a 65mm TB is a lot smaller than the cross sectional area of the plenum. So the air has high velocity going through the TB, but as soon as it goes into the plenum, velocity slows down.
Going to a smaller plenum cross sectional area will keep velocity up, but may sacrifice equal flow across the 4 runners.
Going to a smaller plenum cross sectional area will keep velocity up, but may sacrifice equal flow across the 4 runners.
Mikey I think what Timmy is saying is that he CAN suck a golf ball through a garden hose
Man I hope this manifold works... I love the look of SMIM's. I loved the looks of my old DI, but holy crackage
Thanks Tim, that's good enough for me to understand. Here is something interesting that I have seen.
The inlet to the plenum needs about 1.5" over the runners in order to not cause turbulence and uneven flow across the runners. That is just an observation I have come up with messing with this stuff on the flow bench. This particular intake has 2" from the base of the TB intlet to the plenum floor.
The stock intake we were able to get very well balanced with about 1" from the TB inlet to the top of the runners. It also took some work to the back of the plenum because the stock plenum shape has some flaws in it for equal flow, although it doesn't seem that way on the dyno.
This plenum, I feel is too large still. It should be on the dyno today and we'll see what the results are.
As for selling this intake. This particular intake may go up for sale when I am done if someone wants it but it is going to be a one off. As I said I miscalculated the runner length and what would fit in the car easily. It's tight but does fit, it wouldn't work on a car with ABS or A/C, other than that I suppose it could actually be duplicated and sold.
It will probably be next week before I get some other parts in I am waiting on and some need to be drawn up and machined. Then I am going to slow this effort down quite a bit and try to make the next one 100% exactly like I want it.
First I need to determine if this runner length and plenum do anything at all. Maybe I am just wasting time and money on this effort.
The inlet to the plenum needs about 1.5" over the runners in order to not cause turbulence and uneven flow across the runners. That is just an observation I have come up with messing with this stuff on the flow bench. This particular intake has 2" from the base of the TB intlet to the plenum floor.
The stock intake we were able to get very well balanced with about 1" from the TB inlet to the top of the runners. It also took some work to the back of the plenum because the stock plenum shape has some flaws in it for equal flow, although it doesn't seem that way on the dyno.
This plenum, I feel is too large still. It should be on the dyno today and we'll see what the results are.
As for selling this intake. This particular intake may go up for sale when I am done if someone wants it but it is going to be a one off. As I said I miscalculated the runner length and what would fit in the car easily. It's tight but does fit, it wouldn't work on a car with ABS or A/C, other than that I suppose it could actually be duplicated and sold.
It will probably be next week before I get some other parts in I am waiting on and some need to be drawn up and machined. Then I am going to slow this effort down quite a bit and try to make the next one 100% exactly like I want it.
First I need to determine if this runner length and plenum do anything at all. Maybe I am just wasting time and money on this effort.
Jeff.....you should order Hooked on Phonics, because that's DEFINATELY NOT what I typed.
Mike....where's that garbage can at?? I could probably sell it for a $1000 pretty quickly.
Here's a post I made on BR forums about a week ago that I still find interesting. I wanted a V2, but I didn't have $1500 laying around and I didn't see any major differences between it and the BR ported intake at the track.
Mike....where's that garbage can at?? I could probably sell it for a $1000 pretty quickly.
Here's a post I made on BR forums about a week ago that I still find interesting. I wanted a V2, but I didn't have $1500 laying around and I didn't see any major differences between it and the BR ported intake at the track.
Originally Posted by SloRice
One thought I want to make public is a real comparison of the BR ported manifold vs. the V2.
vwjeff, SPIN2GST, Celica2Evo, Daniel Buschur and I all have VERY similar setups. Most of the mods are the same, but I will note the differences next to each name below along with the best run.
Daniel B. - BR ported mani, Tilton C/C, GT37R - 9.67@149.64 mph.
SPIN2GST - BR ported mani, Exedy triple, HTA35R - 9.84@149.46
vwjeff - V2, Exedy triple, HTA88 - 9.80@148.60 mph
SloRice - BR ported mani, Tilton C/C, HTA35R - 9.9112@145.6 (have had a best MPH of 147.xx though)
Celica2Evo - V2, Exedy triple, HTA35R - 9.89@142.92 mph
All of these runs were done at the same track, Dragway42.
The ET's are all pretty close, minus Daniel's. I don't know about the other guys, but mine was on a 1.53 60ft, so pretty poor and it was Trent's one and only run in my car. The ET variances are all the result of the 60ft and shifting.
But the one thing I find interesting is the MPH's. David's testing showed something like 40whp gain with the V2 over the BR ported manifold. If that's the case, I would think there would be a noticeable difference in the MPH's of vwjeff and Celica2Evo's cars versus Daniel's, SPIN2GST's and my car...but there isn't.
Just some food for thought on what parts are really worth the money and which aren't.
vwjeff, SPIN2GST, Celica2Evo, Daniel Buschur and I all have VERY similar setups. Most of the mods are the same, but I will note the differences next to each name below along with the best run.
Daniel B. - BR ported mani, Tilton C/C, GT37R - 9.67@149.64 mph.
SPIN2GST - BR ported mani, Exedy triple, HTA35R - 9.84@149.46
vwjeff - V2, Exedy triple, HTA88 - 9.80@148.60 mph
SloRice - BR ported mani, Tilton C/C, HTA35R - 9.9112@145.6 (have had a best MPH of 147.xx though)
Celica2Evo - V2, Exedy triple, HTA35R - 9.89@142.92 mph
All of these runs were done at the same track, Dragway42.
The ET's are all pretty close, minus Daniel's. I don't know about the other guys, but mine was on a 1.53 60ft, so pretty poor and it was Trent's one and only run in my car. The ET variances are all the result of the 60ft and shifting.
But the one thing I find interesting is the MPH's. David's testing showed something like 40whp gain with the V2 over the BR ported manifold. If that's the case, I would think there would be a noticeable difference in the MPH's of vwjeff and Celica2Evo's cars versus Daniel's, SPIN2GST's and my car...but there isn't.
Just some food for thought on what parts are really worth the money and which aren't.
I didn't read this entire post but I think there might be some nice gains by changing the inlet location away from the typical side entrance!
Pics of the new manifold your working on looks great so far. I wish I could weld like Trent haha. Keep up the great work and thank you so much for all the testing you do for everyone!
Pics of the new manifold your working on looks great so far. I wish I could weld like Trent haha. Keep up the great work and thank you so much for all the testing you do for everyone!
