Anyone here run an aftermarket intake manifold such as that one on a bolt on gs430 with no other mods such as fi?? I was curious to see if its worth getting one both performance wise as well as cost wise. So far I have a cat back, intake, apex neo, and plans on getting an x pipe soon. I dont think there is much more to get as far as bolt ons besides headers, but I was curious to see if and what kind of gains an intake manifold would give. Any info would help. thanks

 

Thats a good question. I would be curious to see what kind of benefits a intake manifold would do. Would it run ok with the stock ecu? I think that engine in your pic is a built motor by mvp with alot more done than just the manifold.

 

yea that is their built motor and i hope they dont mind me using a picture from that thread. I made a post on there, but it seems to have fallen behind so I made a new thread here. Im curious cause on my swapped del sol I swapped out the intake manifold and also added a phenolic intake spacer basically just a gasket out of a different material to reduce temps and I think it helped out quite a bit.

 

Yea i dunno how restrictive our stock intake manifold is. But if they are swapping it on there built engines there must be power to be gained.

 

Although the pictured manifold is decent fabrication it will not make your car better. Low end torque will be lost. The short runners potentially will tune at a very high RPM (higher than the fuel cut) unless it is properly developed and tested its effectiveness is only theoretical (again only at high RPM).

The stock manifold is actually a beautifully engineered part with two stages of tuning. Eight internal butterflies open above 4800rpm (IIRC) under full throttle operation. They effectively shorten each runner tuning it for the higher RPM. At lower RPM the butterflies remain closed so the ramming effect and tuning of the longer runners can add torque and power.

If I was to modify the intake I would extrune hone the stocker and maybe do some flow bench shape mods possibly around the stock injector bulge at the manifold to head interface.

You have a 430... you NEED headers... the 430 logs are DOGS.

 

port match couldn't hurt either....i know other cars gain retarded hp just from a port match on the intake manifold. Right on the headers though, probably the biggest improvement for a 430 outside of SC or TT

 

Thx for the info Jbrady. I found it very informative.

 

highly doubt strut bar will fit over this either, if people have them. r u gonna be the guinea pig for this mod lol

 

Hey jbrady or ppl who know about the stock intake manifold. Do you think the stock intake manifold would be prone to nitrous puddling?

 

I'm actually in agreement with JBrady for once if only to point. On an otherwise stock engine, this intake wouldn't make much of a difference. We build the manifolds mainly for the MKIV's Supra swaps because of hood clearance issues. That and just about every other mod that can be done to the engine has been done.



If you're looking to mod your V8, look at headers first. Without a doubt. There are varying degrees of quality on the market, let's just leave it at that. In fact do all the simple bolt on first. Cams will make a difference as well. The stock intake is ok, but not what I'd use for anything making real HP.

Eric

 

That Supra looks and surely performs beautifully.

Do you have any tuning, dyno numbers and or driving impressions for your various parts such as cams?

Some parts work very nicely by themselves others need to be used along with other mods in order to perform properly. There has been many parts and such reported from your group but I cannot recall any actual testing data.

BTW, I find it humorous that you apparently find it difficult to agree with me... So, are you saying the stock VVTi intake will not fit under the Supra hood after a xUZFE engine swap?

If so, then it is of course understandable to create a lower profile manifold especially when turbocharging as that would cover any losses. BTW, it LOOKS very cool... but IMHO looks alone are not a good reason to change an otherwise excellent part.

 

supra looks insane. I wish that was the engine bay of my gs

 

JBrady, I've seen no evidence that the stock GS400 intake outflows the mainfold in the picture. Do you have any flow numbers on it? I've flowed the new mani against a stock 2uz manifold and the results were dramatic. Like 29% more flow dramatic. I've got driving impressions, but I'm not sure how they would relate to a GS. I've got an SP400 w/ 3.76 rear, ore aggressive cams, intake, big valves, big ports, etc. It all works together so pinpointing is up for conjecture. First impressions can be summed up in one word I suppose. Aggressive.

Eric

 

jb, I did port match and clean up my intake mani on my 97 SC4 and did feel I had a little gain. Never dyno'd. But felt like it pulled more and had more Midrange.

Question I have is I now have the 99 SC4 with 1uz VVTI. I know you have showed cutaway pic of mani on VVTI and it shows Butterfly Valves inside.

1. Butterfly valves don't seem removable, so what happens if Extrune Hone tried to tried to send that subtanced they use up in the Butterfly area ?

2. If I remember Extrude H. wanted about $ 600 + to do our mani. Is there anyone one else or any other way to clean up the upper that you can think of without damaging the Butterflys cheaper ??

3. I know the throttle body is thin, but what about enlargeing/boring it a little, and or do you know if the 3Uz - 430 motor throttle body is bigger ?

cOwboy, Killer Supra & feel free to add if you know of somthing, and you 2 just agree to disagree . I think this is a free hp non engine stress improvement that could gain good with other mods.