75mm tb on a n/t. thinking about it lately

[na90dsm]

im wondering if this would be a good upgrade for the n/a motor. as we have to let more air in the motor instead of forcing more air in i think this would be a good advantage. we only have 2 vacum ports off our tb. if i remember correct one of our intake manifold goes to the fpr and the 2 on the tb go to the egr and somethign else i cant remember right now because my brain isnt working.


i looked at the bbk throttle body install on a mustang and the 75mm has no vacum provisions on it. so what we have the ability to do is to run a turbo intake manifold which has 2 vaccum ports on it instead of one and run those to whatever we need. we can block off our egr and run the one i cant remember where it goes off the manifold and the fpr off the manifold. i think it would be way easier to put one on a n/a motor then a turbo motor

let me know what you gusy think. im goin off to do more research

 

[miamieclipse]

you will lose power, do the research and that is what it is goign to say.

60mm max for n/a.

 

[GSGoinFast]

you will lose power, do the research and that is what it is goign to say.

60mm max for n/a.

hes right but what car do you have?

 

[Gorkoracing]

I'd say 57mm max for his N/A. You can go with a 60mm but It wont give you that much more than the 57 will since your not turbo. If modern performance would ever get theirs in and send me mine I'll have one of their 60's soon since i sold my jeep tb.

 

[na90dsm]

i have well am getting another 1g n/a eclipse. i had one. you can run a 75mm but need good head work. we also wont have to worry abotu breaking the throttle shaft as we dont presurize our intakes.

i think with 272 combo and a custom intake pipe, aftermarket intake manifold and higher compresison i can get it to work. im still doing a few figures on it to see about flow numbers and such.

i think i can get ti to work. itll have to be a severly tuned motor though cant be just liek exhaust and intake then tb. i got s spare blocks for a n/a which im gonan build up eventually. well see what i can come up with.

im aiming to prove everyoen wrogn this time. so, im shooting for over 200hp n/t. and yes i can do it.

 

[miamieclipse]

good luck, i think i have hit 200 hp...i will soon know as once i get cam gears i need to get everything dyno tuned.

 

[94Talon2]

The stock N/T TB is 64mm, that's huge; bigger than the Turbo which is 60mm, The intake ports are also huge on a 1g 4g63, so a 70mm TB might help, if you can do it cheap I'd try it out.
You will not lose hp by doing this

 

[na90dsm]

i knew the 1g n/t tb was huge to begin with. i looked at some head flow numbers on a previous pot on here and showed some serious flow on a level 4 head. here are the numbers

stock head
Lift CFM
.050 48.91
.100 94.21
.150 139.62
.200 181.24
.250 216.94
.300 241.11
.350 261.52
.400 271.14
.450 280.45

those are numbers for a stock head with no intake on a flow bench. thats through the number 3 port i beleive. now if it does that through each port it flows leik 1121.80 collectively through the head. thats on a stock head with no intake. now the 75mm tb flows 915 cfm. so nwo why would i loose power.

if i go cams, cam gears, up the compression, level 4 head, use a custom 3 inch intak epipng setup, and the maf translator from punishment what would stop me form hitting 200+hp. the motor would respond awesome and back it all naturlly with full exhaust and all plus nitrous on top it would be a kick ass motor. with no spool time.

correct me if im wrong on those numbers being collectively that high. but if im righ thow can i loose power.

heres numbers for the level 4 head.


4G63 level 4 head. 1mm over valves, no intake, ¾ radius entry

Lift CFM
.050 60.38
.100 106.30
.150 161.19
.200 187.97
.250 241.11
.300 270.10
.350 298.19
.400 309.45
.450 320.31
Now I kept on flowing it past this lift to just see what this thing could do.
.500 334.25
.550 345.98
.600 357.32
.650 365.21
.700 374.46 Now that should give some of the V8 guys nightmares.

got info from here.http://www.dsmtuners.com/forums/showthread.php?t=53893