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Location:
Gold coast
Registered:
June 2005
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4agte with 4agze manifold
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Mon, 12 September 2005 08:57
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hi all....just curious as to whether anyone has used a 4agze inlet manifol and adapted the throttle body to bolt onto it.....i have just done it and am curious..
i done a lot of research and alot said they were bad.....i thought i would give it a go as toyota used them on the supercharged motors so if they were good enough for them then i will give it a go...doesnt cost me anything....
just curious as i havent seen anyone use them,
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Location:
Toronto, Downtown
Registered:
September 2004
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Re: 4agte with 4agze manifold
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Mon, 12 September 2005 09:14
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they are a horrible little thing ditch it and use the n/a inlet manifold
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Location:
Brisbane
Registered:
May 2004
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Re: 4agte with 4agze manifold
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Mon, 12 September 2005 09:16
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Not really sure what you're getting at dude. Got any pics for us to see? I'm interested to see what it'd look like.
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Location:
Gold coast
Registered:
June 2005
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Location:
Gold coast
Registered:
June 2005
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Re: 4agte with 4agze manifold
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Mon, 12 September 2005 11:08
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not trying to be argumentative.......but why would they use them on the original gze if they are that crap.....stock gze's put down good power and torque......dont get me wrong.....im just after some opinions......
regards
jesse
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Location:
Brisbane
Registered:
May 2004
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Re: 4agte with 4agze manifold
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Mon, 12 September 2005 11:42
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ok man, 2 things I see wrong with using that manifold.
1 - Displacement. There are formulas used to work out the optimum plenum chamber size. 0.8 - 1.5 times engine displacement for 3 - 6 cylinder engines (Forced Induction Performance Tuning).
2 - Runners. There are also formulas to work out optimum lengths and diameters. Runner diameter "fixes" peak horsepower at a certain rpm. Runner length "rocks" the power curve around this peak hp rpm. Long runners = more bottom end, less top end. Short runners obviously do the opposite.
There are also considerations regarding properly shaped runner entries (i.e. meant to be bellmouthed). Also, the plenum is meant to abruptly open up to a much large area directly after the throttle. This slows the air, and stops air from rushing over the runner entry closest to the throttle and starving the first cylinder.
Additionally, roots type blowers cause a pulsing air flow which can be a problem. To combat this, a much larger plenum is used (2 to 3 times engine cc).
As to why Toyota chose to use this manifold. I recall that the part of the manifold you are using is only one section of a pretty complex setup. Toyota would have gained extra plenum chamber displacement through the parts that you have discarded in changing to a turbo.
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Location:
Gold coast
Registered:
June 2005
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Re: 4agte with 4agze manifold
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Mon, 12 September 2005 11:50
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i agree that the displacement issue is there....i dont completely understand that i admit that,,,,as for the air entry...the air is pushed into the runners right in the middle of all of them and they split form there....thanks for your input though as that is what i am after.....i guess we will find out how good this etup of mine is on the dyno.....lol...
regards
jesse
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Location:
Toronto, Downtown
Registered:
September 2004
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Re: 4agte with 4agze manifold
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Mon, 12 September 2005 13:39
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the manifold on the 4agze dosent have alot of room with the s/c i feel toyota made the s/c inlet manifold to fit to the space confinements they had as opposed to performance
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Location:
Montrose, VIC
Registered:
May 2002
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Re: 4agte with 4agze manifold
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Mon, 12 September 2005 14:07
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If you were turbo'ing an EA Falcon, would you use the single point (electric carb) manifold or the mullet (multi) point one?
(Actually, if you insisted on using a factory part you'd use an EF manifold, but that's another story!)
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Banned by his request
Location:
moved to tamworth
Registered:
July 2002
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Re: 4agte with 4agze manifold
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Tue, 13 September 2005 08:53
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the gze manifold is crap!it was used on the gze because of space and setup.goes without saying,if they could have used the 4ag manfold they would have, because they where already in production.
mick
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Location:
Bundaberg, Qld.
Registered:
May 2002
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Re: 4agte with 4agze manifold
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Tue, 13 September 2005 09:21
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one of the guys in the states did his 4agte with the gze inlet, but i havnt seen posts of how it went.
simply there is no reason why it will not work, just not as effective in a turbo situation like a ge inlet manifold will.
if it works for you and your happy, go for it. post up how it runs man, if you get it on a dyno. 
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Location:
Gold coast
Registered:
June 2005
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Re: 4agte with 4agze manifold
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Tue, 13 September 2005 11:52
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yeah......im giving it a go...i have a n/a inlet manifold as well tht i cut and shut...but it has no TPS and toyota wnt $220 for one...so for now im just going the gze...i will dyno it and post the figures.....
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Toymods Board Member
I supported Toymods
Location:
Turramurra, Sydney.
Registered:
May 2002
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Re: 4agte with 4agze manifold
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Tue, 13 September 2005 21:05
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| the_sleepa wrote on Mon, 12 September 2005 21:08 |
...but why would they use them on the original gze if they are that crap.....stock gze's put down good power and torque......dont get me wrong.....im just after some opinions.....
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If stock GZEs are that good, why get rid of the S/C for a turbo, or do anything to modify it?
Getting rid of the GZE manifold is simply another modification that will net more power, just like getting extractors & exhaust, or bigger air filter & cold air induction, or pissing off the S/C for a turbo. Would you go to the trouble of a turbo conversion & keep the standard airbox? Or get a nice set of extractors or a big dump pipe & bigger exhaust system & keep the standard muffler?
As has been said there's no reason it won't work, but the same goes for the S/C and it seems you can see the merit in changing that. The ZE manifold is obviously designed due to space restriction, bet luckily there's a much better one commonly available that wil bolt straight up. It's a no brainer really.
Keep an eye out in the For Sale section & chuck up a post in Wanted, a TPS will turn up sooner or later & shouldn't be more than $50.
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