7MGTE build up questions.

[wiseco7mgt]

how does it go with the fuel delivery being the the fuel flow is reversed to the injectors?

huh?how the hell does that affect fuel delivery?all hes done is change the way the throttle body connects the manifold.my question is, is this a permanent setup or is it purely experimental?have you got designs on building a whole new custom forward facing manifold?ive been drawing up designs in the shed for mine but i dont understand enough on how the isc needs to be mounted to get the right flow to make its corrections.maybe im thinking to far into it and it just needs to measure manifold pressure ...hmmmm can anyone shed some light on this?

[TheStitt]

how does it go with the fuel delivery being the the fuel flow is reversed to the injectors?

If I understand the question there is no real change from factory the air is still coming into the msnifold from exactley the same point and angle from factory. Just across the other side of the manifold.

I did speak with my fabricator about going a full custom set up but it all came down to funds. We had to go that way cause the wagon didn't have the room to run both lots of IC piping thru the r/h guard. So to make it fit and to shorten the intake lenght thats what he came up with.

In a way it is permantent however if I really went showy I would get a full custom one done.

The only problem for you guys to do this is that the struts get in the way on MZ20's MA61's and MA70's as I have had this manifolds close to all these cars. I supose it one of the advatages of the double wish bone in the bus.

[TheStitt]

Also as for the ISC wh run it if you are going to all the trouble of a Custom Manifold wouldn't you have an after market managment on it

[boxh34d]

Anyone have any thoughts regarding sumps???

[payney8]

duh!!! swirl in the manifold the manifold is designed to take the fuel straight to the injectors in a certain pattern in the 7m it has a swirl effect for easier intake so therefore the whole manifold is designed with the delivery from that side and when he reversed the flow of air and there fore changed the airflow pattern it could upset the delivery by way of disturbance in air current and thestitt. It isnt coming from the same way if u think about the way the runners are designed in is in a hemisphere were was now uve created a s shape in whitch the airflow goes

[TheStitt]

a fair enough I wouldn't of thought it would of changed all that much

[HKS_TRD]

This is probably thinking a little simplisticly but I reckon once the air has gone through the runners and gotten to the injectors its probably achieved a similar flow pattern to the standard setup. How that modification would affect distribution across the cylinders would be interesting though.

[Shifty]

This is probably thinking a little simplisticly but I reckon once the air has gone through the runners and gotten to the injectors its probably achieved a similar flow pattern to the standard setup. How that modification would affect distribution across the cylinders would be interesting though.

Danny you're spot on there - in the real world I can't see a change, given that the injectors don't fire into the plenum... the air has already entered the runners at that time and it can really only go one way. There might be a poofteenth in it but I reckon our friend is just trying to sound like he knows his shit

As for all the rebuild questions, all a healthy 7M needs is a new head gasket (Toyota or otherwise) and 400rwhp is not a problem, however they tend to be long in the tooth so rings, bearings, balancing etc is all worth a look if you have the money/time/patience, and while you have it apart forgies can be a nice safety margin or a warm fuzzy feeling, but for your power levels they're most certainly optional.

I tire of the question about standard pistons, I can think of very few modern engines that can't handle double or triple their factory outputs with standard pistons and an appropriate tune. You can melt a $20k bottom end end with a poor tune, simple as that.

Quite common in the world of VL turbos.. they say that stock pistons are useless above 12psi. That's certainly not the case, plenty of 400hp+ VLs with stock internals... the thing is that people whack on a $50 bleed valve and run 14-15psi with a stock ECU, no intercooler and stock injectors and burn a hole in one... so obviously it's those pesky standard pistons. Look at the cause, not the result.

As long as the pistons are good and an oversize is not required, then there is no problem reusing them. Your money is better spent on a good ECU and a good tuner than a full-house rebuild... I shuder every time I see something with an APEXI 1337 SARD HKS FCON-V P-SAFC AVCR DEFI P-FCON fitted to their car. While they're effective in many situations they're little more than a bargain-basement bandaid solution.

Car owners always get greedy and while you want 300rwhp now you'll want 350 later, and then 400... and that's where the usefulness of these little nicknacks runs out..t hey're designed for a specific purpose and to allow (for example) 20% leeway over what the factory ecu/sensor would be putting out... as soon as you want to make any decent power they become the fuse that lets down your whole combo.