ram tubes for 20v blacktop

[SRacin]

Ive decided that there is far to much hearsay, im am going initally run the factory units, and I am going to get some belmouths spun up, and using a Dyno and some rubber hose I will find a good combination im sure.. Right i need to go book some dyno time..



Cheers
Logan

[adamaw11]

Ive decided that there is far to much hearsay, im am going initally run the factory units, and I am going to get some belmouths spun up, and using a Dyno and some rubber hose I will find a good combination im sure.. Right i need to go book some dyno time..



Cheers
Logan

That'd be awesome if you could do some dyno comparisons between different ram tubes

Looking at the way the factory tubes have a pretty harsh edge on the opening with just a slight flaring out, I'd expect there would be some improvement to be had with just a nice rounded bellmouth, even without considering the technicalities of length and venturi effect etc.

The other thing about the factory rubber ones is when running without the airbox, and just filter socks over them, they don't appear to seal very well, since doing them up tighter, just makes them deform more.

[SRacin]

I just had a good stare at my engine bay and have a small probably, on number 4 there is a certain clutch master cylinder in the way, the factory tubes fit. but good be very difficult to try any variety of tubes due to the space restricition, does anybody know of a super duper compact clutch master cylinder?

[takai]

There arnt really any compact clutch masters around, but many are longer than need be. I have ground around 15mm off the end of my clutch master with no adverse effects.

[Jonny Rochester]

Do the silvertop plastic ones fit in the AE86 engine bay? I'm just wondering if I have to buy some right away.

There is a local guy here in Hobart that has made some very nice carbon fibre ones for a silvertop. He wants about $200 for a set. They only just clear the AE86 booster, but can be made a different length. I'm sure he could do them for AE111.

[FMS01]

Do you have contact details for this guy in TAS?

Cheers,
Julian.

[Jonny Rochester]

No solid detail right now. But I know people that know people. I could organise it. How many people interested?

[FMS01]

need some more details first.

Overall length, taper, radius, internal diameter, carbon or ali flange, photos etc.

If all the details are OK then I'll progress with plans to make my own carbon plenum (with a perspex window to view the carbon trumpets of course ).

Cheers,
Julian.

[adamaw11]

There is a local guy here in Hobart that has made some very nice carbon fibre ones for a silvertop. He wants about $200 for a set. They only just clear the AE86 booster, but can be made a different length. I'm sure he could do them for AE111.

Are they made with a flange to bolt straight on? if so, $200 is a pretty good price for a set of 4. I'd be interested providing the sizing / shaping etc seemed good, but I can't see it happening quick enough for me, since I want to get mine before a certain date.

[SRacin]

Blacktop20v in DX with AE86 intake exhaust manifold and open trumpets pointed upwards with no bonnent and no filters on dyno, with big fan blowing made 130hp at wheels and 700Nm of torque at wheels in 4th gear pull. Running on 98 gas with LOTS of timing (only made 96 HP to start with and did this funny dip of 50hp at 6k when vvti switched!). Standard computer, 140k's on motor, little bit of an an exhaust, no other mods.

Not to bad me thinks. Very close to factory rating of 165hp if u assume 20% loss. Anyway this is just the base line for further mods.

Cheers
Logan

[adamaw11]

open trumpets pointed upwards

Are you saying its got the factory trumpets turned around the other way so that point upwards or is it some aftermarket ones?

Have you done any comparison runs yet with factory trumpets vs aftermarket ones? that would be really interesting, especially with dyno graphs to compare the powerbands.

[takai]

700Nm of torque at wheels in 4th gear pull.

Oooh, can i be the first to call BS. Lets do some simple calculations here:
700 newton meters = 516.293504 foot pounds
and the stock engine is rated at:
120ft/lbs@5600rpm

Now sure 4th gear probably isnt quite 1:1 but it is hellishly close. And most certainly you arnt going to be pulling 700Nm like that.

Also, the highest reading blacktop i have seen here in Australia, which is still running on the factory internals but with a slight fuel adjuster made 91kw, which is 120hp.
Somehow i think the dyno is reading a bit high...

[SRacin]

No need to be rude...

Yea probably some crazy multiplication factor on the torque so yip its very hi and needs scaling down of course.. Heres the graph attached.

Yes open factory trumpets pointing upwards. Can do much with aftermarket ones untill I move the clutch master cylinder.

see

homepages.xnet.co.nz/~logan/ke70

There is also some pics of my beautifull new headers (which will be final things made from 1 piece mandrel CNC bends, equal length and dyno tuned. we are going to put a slide before the collect and see what we can do in regard to shifting the torque around.)


Cheers
Logan

edit :

Headers will be available for 300 NZ with 16v or 20v flanges. Dyno is dyna pack hub dyno, which has been tested and tested. And even if it is reading hi, so be it, its still a base line which all my further mods will be done, we did lots of messing with the timing to get the power up, change the timing slightly we got from 120 -130hp, but its very easy to over cook. Even with the timing maxed out the thing didnt det, just made like 110hp. anyway..

[takai]

I wasnt being rude. But 700Nm is a huge claim from a stock engine, and it does put the rest of your results in an unfavourable light. For reference a 4AGZE in RWD trim in 4th gear with a 4.3:1 final drive makes in the range of 300-350Nm.

[SRacin]

Actually it works out pretty dam well to factory figures.

700/4.1 (diff ratio) = 170.73 Nm = 125 lb ft which is pretty dam close to factory. my bad on first post