More power from GQ 2.8

[YNOT]

Yeah mate if the intercooler is to big I'm told you can have pressure drop any way,and the manufacturer should be able to tell you it's flow rate.
I have a calc somewhere to help work out an engines N-A air flow volume rate, but recon if a turbo is thrown into the mix you would need to take boost into affect, my point is, there is probably a calculation for working this out, I just don't have it to pass on. someone out there may?.
Cheers

This is not exactly what you are looking for but may be of some help, check this website; http://www.turbobygarrett.com/turbob...ge_air_cooling

Tony

[YNOT]

It's called a dyno!!!! lmao

Would be bloody good thing though - after fitting my turbo, all the thoughts would be that the standard air box wouldn't be up to the task and would starve it of O2 somewhat - now on the analyser, I've got both unburnt fuel AND oxygen coming out the pipe whilst we try to get it humming (still at the mechanics) ... obviously need to alter a few things, but at least I'm a little more certain that's it's getting enough now. Would be nice to be able to calculate it at the outset as some would just go out and spend their hard earned on a new air intake setup just because of uncertainty ....

If you want to know if your airbox or snorkel are restrictive do a dyno run with and without them, if there's little difference they're not restrictive.

Tony

[Bigrig]

If you want to know if your airbox or snorkel are restrictive do a dyno run with and without them, if there's little difference they're not restrictive.

Tony

Really? Do you really think I'm going to rip them out? Especially at $140 per hour whilst it sits on the machine? Have you even ever met me?? lmao

[97_gq_lwb]

I just fitted a zd30 gu airbox into my gq apparently they work quite well.

[Robo]

I know this isn't really relevant here, but this came to mind reading thread.
My 89 Gtr came with fairly smallish looking air box and filter about the same size as the 1.8 Lt 97 lancer we had at the time.I had fitted twin pods 3 times the filter area.
now you would think this std set up restrictive with twin afm attached to box but my engine builder/ dyno man informed me he tuned 1 to achieve over 300 KW atw with std filter, with the Garrets I had, no value in $500 twin pods go figure that. Always learning.
Wish I had his R33Gtr, 700 kW atw. what fun!!.

maybe try disconnecting at point where snorkel meets inlet inside bay and compare against connected.
but this only figures for a no ram affect snorkel standing still, unless someone can aim a fan at snorkel intake and measure wind speed to determine power factoring wind speed to h power at predetermined speeds..
still stuffing around to find out as you noted. but would't you just love to know !.
or the other approach is contact snorkel manufacturer and ask flow rates for it and you can maybe check against motors current needs.
Bottoms up.

[Robo]

If ya want I can find calc for working out air flow of N-A engine, this helps for working out max size carby, cfm figures so not to drown engine or restrict, no good here I know, may help someone down the track.
And nice one Tony, the Garret link looks like a great read.

[White Elephant]

Well i have bought an intercooler of e bay its a bar and grill type aluminium but i tried to be conservative and only got a small one, 450x300x70 as i didnt want to completely cover the other radiators with it.
The reason i didnt go big was the fact that a mate just bought a ford ranger and it is intercooled with a small size one so i thought it must be ok as the new cars are only using fairly small ones so they must work ok.
I will fit that as well as a 3inch exhaust, reconditioned injectors get the radiator flushed out by pro's and see how she goes. Oh yeh and i was going to fit a boost guage and boost adjust valve and try and turn it up a bit.
Thanks for the help ill let you all know how it turns out.

I'm very interested to see how you go about this, I have been toying with the idea of fitting an intercooler to my RD28T for some time, I will keep my eyes on this thread! Good luck with it.

[Ben-e-boy]

I like this thread. The poor guy came with 3 issues, alot of the resonces are dribble about petrol engines and left with an cheap intercooler

problem solved