Toyspeed.org.nz Message Board

by **Bazda** » Mon Mar 01, 2010 3:37 pm

Yes Sir. Will post up FI dyno plots tonight. But that doesnt help as this application in N/A which I cant get hold of at present time.

OMG so shiny! · by **Dell'Orto** » Mon Mar 01, 2010 6:02 pm

Would be very very interested in seeing some back to back dyno plots actually. I too dont doubt they're an improvement, but would be good to have verifiable proof.

by **Bazda** » Mon Mar 01, 2010 10:41 pm

Well this was an FI application.
Doesn't really tell you heaps as it already was using a custom plenum with radiused bell mouths but only at the entrance of the throttles.

The plenum supplied was using 40mm tapered bell mouths.

So new plenum in purple, old plenum in green.

Will get proper results when run on BZR4AGE's car for the N/A guys.

by **kramer2202** » Sun Apr 18, 2010 3:58 pm

my car has been on the dyno and iv got one of bazdas plenums but i think somthing is rong some where because i only got 100kw atw on 1st tune but i was exspecting alot more as iv got bigger cams fgk headers full exhaust port and polish 3angle valve gring big compression link plus G1 on a blacktop motor so yea i dont no if that helps any one.and if any one may no why im not getting more power that would be good to no to thanks.

by **mr30%jr** » Sun Apr 18, 2010 5:11 pm

kramer2202 wrote:my car has been on the dyno and iv got one of bazdas plenums but i think somthing is rong some where because i only got 100kw atw on 1st tune but i was exspecting alot more as iv got bigger cams fgk headers full exhaust port and polish 3angle valve gring big compression link plus G1 on a blacktop motor so yea i dont no if that helps any one.and if any one may no why im not getting more power that would be good to no to thanks.

stink dude... makes 7age blacktop running link only makes 99 kw prolly just some inacurate dyno?

by **kramer2202** » Sun Apr 18, 2010 7:03 pm

yea i dont no ae ,like its not slow it hauls ass for a fxgt but it would be good to get 120kw atw like i hoped.

by **Bazda** » Sun Apr 18, 2010 8:26 pm

who did the headwork?
Sometimes people porting 5 valves head can make it worse in some cases.
What are your cam specs?

by **kramer2202** » Sun Apr 18, 2010 9:13 pm

Bazda wrote:who did the headwork?
Sometimes people porting 5 valves head can make it worse in some cases.
What are your cam specs?

roscoes engine shop, and 270in and 272ex

by **Bazda** » Sun Apr 18, 2010 10:18 pm

Did you get the flow ratings before and after they did the porting?

by **d1 mule** » Sun Apr 18, 2010 10:46 pm

reguarding the whole "cold air box" arguement, I've watched a few videos from the HKS Jp website recently and not a single one of their cars had a "cold air box" not even the time attack evo or the drift S15 etc none of them.

I my well be wrong but if HKS dont do it it cant be worth doing can it??

by **Bazda** » Sun Apr 18, 2010 10:59 pm

They dont have a cold air box inside the eng bay as they most likely have cold air ducting from else where. They prob dont need a box to defelct heat as they are always doing high speeds so that ducting will always be pushing cold air to the filter.

by **RomanV** » Mon Apr 19, 2010 12:34 am

Is it not fairly irrelevant on a turbo car, where the air is getting heated up a whole lot by the turbo anyway?

It's only how cold the air is entering the intake runners that's really relevant, and thats more determined by the turbo and intercooler.

More value on an NA setup I'd say, especially when combined with drawing air from the high pressure front area of the car, reducing pressure loss.

Helmholtz etc is pretty well irrelevant for an air filter box, for the size of the box and the size of the inlet/outlet pipes it only work at like 1500rpm or something like that, I cant remember the exact figures. But when I did some of the maths on it a while ago, you'd need an air filter box either impractically large, or impractically small to get any resonance affect from it. Having a resonator box inline with the intake piping (As per almost all cars factory intakes) is the most practical way to change resonance characteristics of intake tract.

IMO the best way to design an air filter box is pretty much as per the ARC ones, have a nice full rolled bellmouth protruding clear from the edges of the box, with as bigger volume as practical after the filter. And having the intake on the other side of the box taking air from in front of the radiator panel, high pressure area of the car.

That's something which wont show any gains on the dyno, but will definitely help while the car is at speed.

There are some sweet articles on Autospeed.com about how to test effectiveness of standard intake components, most things I've read that have been written by Julian Edgar have been awesome.

by **gasman** » Mon Apr 19, 2010 7:54 am

i wouldnt say that having a cold air box on a turbo car is of no value. the colder the airi going into the turbo is the more efficient it is so the the outlet temperature will be lower also.

by **kramer2202** » Mon Apr 19, 2010 1:40 pm

Bazda wrote:Did you get the flow ratings before and after they did the porting?

no there were no flow ratings

by **touge_ae101** » Mon Apr 19, 2010 2:27 pm

check this out if you haven't already seen it. mainly on ST but you will get the picture.

viewtopic.php?t=76296&highlight=porting+investigation

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