Different ECU

 

Im not asking, Im telling. You make 6 of those, not 5, and there wont be any problems.

 

I might have to make more!

 

Make that 7 punk!!

 

Eight please.

 

Well I gotta get 2 done for motors in the shop first! I want to make sure they are all right before I say they are ready to rock.

It's gonna be a while! By the sounds of it, I should speed things up.

Bret

 

Thats right, get snappin' boy!!

 

Since I was curious what was making such a difference, I modeled this and measured the difference in line of sight cross sectional area. I know this isn't 100% accurate in terms of airflow, but it atleast will give some insight due to the differences seen between a 58mm monoblade and a 90mm round throttle body. The column furthest left is always throttle angle for reference, and the last set of data shows the percentage larger of the 90mm throttle body. I used throttle angle in hopes of coming up with a custom throttle cam that I can machine here at work to equalize the effective flow area.

CSA Blocked by the blade/shaft (in^2)
.............Mono......90mm
5...........9.632......9.823
10.........9.522......9.711
15.........9.339......9.521
20.........9.086......9.263
25.........8.763......8.934
30.........8.374......8.538
35.........7.920......8.077
40.........7.407......7.556
45.........6.837......6.979
50.........6.215......6.339
55.........5.546......5.657
60.........4.835......4.935
65.........4.086......4.174
70.........3.307......3.379
75.........2.503......2.553
80.........1.679......1.723
85.........0.843......0.861

% Open
.............Mono......90mm
5............0.38%.....2.56%
10..........1.52%.....3.67%
15..........3.41%.....5.56%
20..........6.03%.....8.11%
25..........9.37%.....11.38%
30..........13.39%...15.31%
35..........18.09%...19.88%
40..........23.39%...25.05%
45..........29.29%...30.77%
50..........35.72%...37.12%
55..........42.64%...43.88%
60..........49.99%...51.05%
65..........57.74%...58.60%
70..........65.80%...66.48%
75..........74.11%...74.68%
80..........82.64%...82.91%
85..........91.28%...91.46%

CSA Open (in^2)
.............Mono.....90mm
5............0.037.....0.258
10..........0.147.....0.37
15..........0.33......0.56
20..........0.583.....0.818
25..........0.906.....1.147
30..........1.295.....1.543
35..........1.749.....2.004
40..........2.262.....2.525
45..........2.832.....3.102
50..........3.454.....3.742
55..........4.123.....4.424
60..........4.834.....5.146
65..........5.583.....5.907
70..........6.362.....6.702
75..........7.166.....7.528
80..........7.99.......8.358
85..........8.826.....9.22

% Difference
5...........85.66%
10.........60.27%
15.........41.07%
20.........28.73%
25.........21.01%
30.........16.07%
35.........12.72%
40.........10.42%
45.........8.70%
50.........7.70%
55.........6.80%
60.........6.06%
65.........5.49%
70.........5.07%
75.........4.81%
80.........4.40%
85.........4.27%

If anyone wants the excel sheet which is easier to read, just email me at turbo01fire@hotmail.com and I can send it to you.

 

That explains a lot then Chris... huge differences at the lower end of the scale. Makes sense to me....

Bret

 

Anybody seen this one?

 

Yeah i've seen these things. If I thought that was the answer I would recomend them.

 

Is the bottleneck a problem?

 

bottleneck?

 

So this guy walks into a bar and has a seat next to this other gentlemen. He decides to strike up a conversation so he looks at the gentlemen and asks...

"Hey buddy, what do you think of that new Chrysler?". At which the gentlemen immediately responds, "I think they all suck".

"Well what about the new Ford?"..... "Yeah, those all suck too".

Finally, beginning to get a little frustrated, he turns to the other and asks... "Well what DO you like?" and the gentlemen smiles and says, "Why the ones I sell of course".

-Mindgame

 

lol....

So far all the elbows other than the PT and Wilson have this chopped off short side radius, I still don't get how that's going to feed the front cylinders well?

Bret