Sarg

iTrader: (6)

Usually on high hp cars we tend to upgrade fuel system and rails and go a bit over on the pump. On my build we plan to do a y feeding both rails and then y the two returns back together. But when doing parallel make sure to have equal lengths.

dschmittie1

iTrader: (64)

That is how mine is done

FAST LS1

iTrader: (2)

Maybe this has been covered it's a dumb question, but if #7 gets the least amount of air, wouldn't #7 be fat instead of lean? It would have the least amount of air, but the same amount of fuel being injected as the other seven cylinders. If that's the case we're looking at a cooling problem, as already stated.

Fbodyjunkie06

iTrader: (10)

Oh boy here we go again.

Here is a picture of a LS4.



Looks to me like the #7 cyl is farthest from the person taking the picture on the far left.

Now you turn that motor 90* clockwise and tell me it isn't facing the same way a F-body or corvette does with the tb facing the radiator and not parallel to the radiator. It faces the same way.

Fbodyjunkie06

iTrader: (10)

I do understand what you're saying and that is that the accessories are on the pass. side of the LS4 and that would mean they would be on the back of the motor in a camaro or corvette. Don't you think that it would be hard to put the accessories on the same side of the motor in a FWD as the tb and intake? On this car it wouldn't fit so they had to put them on the passenger side. Has nothing to do with where #7 and #8 cylinders are.

dschmittie1

iTrader: (64)

Yes I am right you are wrong.

That is the odd back on the front. #7 is the bottom right.


Again the front of the motor is on the left of that picture. The flywheel and trans are on the right side of that picture(IE the back of the motor) and the intake feeds from that side.


AS I said before. That intake is on backwards compared to a normal ls1 and they still have #7 issues. It is not all intake related

Fbodyjunkie06

iTrader: (10)

Man bro, if it's runnning leaner it's obviously getting MORE air.

There is an inherent flaw with a foward facing throttle body and an elbow on a single plane, same thing with a foward facing throttle body on the ls1 style intakes.

It is a combination of a lot of things, yes the cooling system does have it's downfalls, but it isn't the single most thing like the first 3 pages of the thread suggested.

Fbodyjunkie06

iTrader: (10)

By what you just said if the intake is on backwards and the front of the motor is the side with the accessories on it then the cylinder you claim to be #7 is really #1.

Sarg

iTrader: (6)

I believe what he means is that if your theory about the intake were the case, on the ls4 the air would make cylinders 1 or 2 lean instead of 7 since the intake is 180 degrees different than the ls1 and ls6.

Fbodyjunkie06

iTrader: (10)

Dude look where the oil fill cap is.

Tell me where your oil fill cap is on your motor hmm? Man you are an idiot.

Fbodyjunkie06

iTrader: (10)

Then he should say that.

I say he has no clue what he is talking about.

dschmittie1

iTrader: (64)

Ok so GM is gonna make a completely different crank and cam just so they can change where number 1 clyinder is so it matches the intake.


I have worked on GM car for A LOT longer than you have and EVERY GM FWD car has the intake feeding from the same direction and #1 is always next to the accessories and the last cylinders are closest to the TB.


You just can't back down from being wrong can you?

dschmittie1

iTrader: (64)

I say you have no clue what your talking about

Fbodyjunkie06

iTrader: (10)

The firing order is no different on an LS4 than a LS1.

You still didn't answer me where the oil fill cap on your motor is.

dschmittie1

iTrader: (64)

Exactly!! so that means if the crank snoutt and cam gear and everything are still on the accessory side of the motor that means that has to be the "front" of the motor and #1 and #2 are on that side of the motor.


other wise the crank and cam would have to be cut completely different than a normal ls1 to make #7 be by the accesories

Fbodyjunkie06

iTrader: (10)

Well you are right the snout is on that side so it has to be on the accessory side. It clicked.

you did say that #7 was on the bottom left.

dschmittie1

iTrader: (64)

Thinking one thing typed another. I corrected that about 8 min ago. Either way the intake is backwards compared to a normal ls1. And the ls4 guys still have #7 issues

The Alchemist

iTrader: (19)

So is the water pump on the ls4 the same as the ls1? If so, then I still stick with it being a flaw in how the block and heads cool number 7.

Sarg

iTrader: (6)

it is different, but feeds the motor the same way. Cooling flow could very well account for it.

427

iTrader: (3)

The intake on the LS1 or LS6 when reversed (installed like the front wheel drive) still burns up #7 first. The intake can be flipped with 10 02 sensors and the afr on each cylinder/bank does not change within the error of the sensor.

Kurt