18 replies to this topic

[oakmere]

Thought I would do a back to back test with the OBD software. The original setup was fitted with a new filter and has the extra hole cut in the bottom and a large trumpet same diameter as the air box outlet. I retained the std inlet pipe. The ITG gained 6 bhp at the top end and tailed off less. What surprised me was the ITG made more torque below 4000 rpm peaking at 10 NM. I would have thought the std inlet would have produced more torque? This was just a quick back to back test. The std intake may have been better after a mapping session. Also not sure what percentage of the improvement is down to the larger intake pipe from the TB to airbox.

[Nev]

Is this on an NA? If so, 6 HP is a lot of gain 

Edited by Nev, 22 August 2013 - 05:10 PM.

[oakmere]

Yes N/A. Not very std though in the 200bhp region so less gains on a std car. You can see the differance in map sensor readings above 5000 rpm that the std setup starts to fall away much more than the ITG setup. Not worth £400 new but shows there are gains on the intake even on an NA!

[alanoo]

Yep the MAP readings at WOT on the Z22SE with the stock inlet, manifold and throttle body are far from outstanding...

[oakmere]

The 2.4 manifold is the limiting factor on my engine now but there is no better design on the market so my engine mods are finnished now.

[smiley]

but there is no better design on the market.

 

 

http://www.dbilas-sh...-Z22SE::95.html

 

That price is for a kit including an exhaust manifold and a remap.

You would have to aks him is he just sells the inlet manifold.

[oakmere]

I have tried to get hold of a used dbilas manifold but missed a few for around the £100 mark on here. But it is not worth paying out £700.00 only to find it is worse than the 2.4 manifold. I would prefer to get one made but room is very limited for runner length. Lotus fitted a short runner manifold to the first NA sprint car so might be worth a try?

[smiley]

I have tried to get hold of a used dbilas manifold but missed a few for around the £100 mark on here. But it is not worth paying out £700.00 only to find it is worse than the 2.4 manifold.  

 

I'll keep my eyes open on the german forum for you. 

[oakmere]

That would be good thank you. I am sure there are many more in use over there.

[wizzard8]

Hi oakmere, what are your specs on your engine? I also run around 185hp in my na with obdtuner. i have the bilas flowtec around here which I want to install during wintermonths. regards from germany markus

[oakmere]

ITG Maxogen, 65mm TB, 2.4L inlet manifold, ported head, 1mm oversized valves, Schrick cams, weapon r 4-2-1 manifold, 2.5" exhaust. Running OBD tuner. OBD tuner power run shows me at 210bhp. I will be interested to see how the dbilas effects you power output. Mine reaches max power at 6500rpm I think a better inlet could see the power continue to rise above 7000rpm.

[FLD]

I have tried to get hold of a used dbilas manifold but missed a few for around the £100 mark on here. But it is not worth paying out £700.00 only to find it is worse than the 2.4 manifold. I would prefer to get one made but room is very limited for runner length. Lotus fitted a short runner manifold to the first NA sprint car so might be worth a try?

 

I have a saab turbo inlet manifold.  Supposed to be better than a 2.4.  You're welcome to a borrow if you want to try it.

[wizzard8]

my mods are pretty similar to yours (cams, 4-2-1, higher compression, 2.4 and 65tb) , i also run bigger injectors already. my crankshaft is balanced, flywheel is lightened and balancing shafts are removed. obd shows also rd 210hp but dynorun stated 185 (it was a disappointing day for all cars around ;-) ) however car feels fine and if you confirm more torque between 3500 and 4000 rpm with the itg this would be the biggest benefit. I also have no raise is power above 6600rpm. my rev is limited to 7200 and it stays at 185. I'll keep you informed how the bilas intake will influence the performance.

[oakmere]

Yes I also have raised CR and the LSJ injectors. Mine was RR at CS at 190bhp before the 65mm TB, injectors and OBD tuner so I would expect it to be around 195-200 on there rollers now. Looking forward to your results with the dbilas and well done resisting the SC and keeping N/A

[Defcon5]

How are you measuring the power? Using a plug in reader? Surely that's not accurate in the slightest

[techieboy]

I have a saab turbo inlet manifold.  Supposed to be better than a 2.4.  

 

I was reading one of the Yankee forums (j-body, I think) the other day and the consensus there was the Saab turbo manifold was pretty woeful for flow in a NA setup (but worked okay with the LSJ PCV system which was how I ended up there). Not overly surprised by that as the runners look very skinny compared to my old 2.4 inlet and the throttle body looks restrictive as well. 

[alanoo]

In pure flow at WOT it works great, but as it has no proper plenum chamber, it is inadequate or even dangerous for NA applications.

 

For anyone not revving higher than 7200rpm, you should consider moving back to the 2.2 manifold with a built engine, it works slightly better in the 6k rpm range where the pressure dip is the worst with the 2.4 (the 2.4 works great higher in the rpm range)

 

I logged this some time ago for example with the 2.4

[oakmere]

Thanks for the offer Lee but as Techi has said it doesn't look the best N/A option. Power readings done via the OBD tuner using measurements from the ECU. Not sure on the accuracy but it is very consistent so great for comparing mods.

[oakmere]

Interesting results but the dip is not that bad on Mine. I get a drop to about 97 kPa your seams to go to 92 that is bad. But I still suffer from the dip you can see the power drop above 6500 them come back up again.