how well does Porting an Eaton work?

[scrmngdave]

Dave B, you can run a 2lb lower with the 2.76 upper. That's pretty much the same combo I'm running. You won't be dissapointed with your decision. The MAF will need to be changed to the SCT Big Air meter, but you should be fine with the rest of the fuel system. I wasn't including the MAF in the fuel system, that's more electronics, but it will probally peg @500rwhp. Anyway, enjoy, for the money spent per power gained, it is truly awesome!

Oh, you will need a different belt if you go with the 2lb lower.

[ausie]

The cost of having the Eaton ported is very tempting. I may just start off small with just a pully change since everything under the hood is still esentially stock with the exception of a few parts. At times I want more and sometimes I think it has too much.... I guess I am a satisfied customer for the time being.

[Big T]

Dave B

If you look on the members section of the Amazon Racing website you will see many with upper/lower combos. There are a few with 2.8 uppers and 4# lowers with ported blowers. I'm going to get mine done in April. I'm building a house now and will have to wait but its definite. I'm going to get the stage 4 port from steig., 2 or 4# lower, heat exchanger, 60# injectors, and probably a new mass air. I should be satisfied with this. I also do not have any suspension upgrades to handle the new power. I won't be doing any hard launches. I don't know where I'm going to get my tune yet. I just want to be able to take down any new Z06's if necessary.

[Dave B.]

Are you guys not the first bit worried about loosing that extra bearing and support/protection for the crank shaft that happens when installing a lower pulley?

the strain on the front crank from the belts must be huge,

[Dave B.]

Im placing an order at once for a Stiegemeier stage 4
they swear 50 HP more from the 468 RWHP that im at now, personaly id be surprised if its that much, but I told them what I had and thats what they said I would get, I also told them I would pay the extra $120 to have all new bearings and seals installed, I cannot beleive they sell them without doing that to every single one of them. thank you all for this idea,

I save about $2700 instead of spending $3400 for the Whipple and without spending a lot of extra money for Injectors and fuel pumps,
it would have produced about the same power,,instead I spend only $625 for the stage 4,,,,,,ill owe you all a brewsky

[Ram77mus]

Originally Posted by Dave B.

Im placing an order at once for a Stiegemeier stage 4
they swear 50 HP more from the 468 RWHP that im at now, personaly id be surprised if its that much, but I told them what I had and thats what they said I would get, I also told them I would pay the extra $120 to have all new bearings and seals installed, I cannot beleive they sell them without doing that to every single one of them. thank you all for this idea,

I save about $2700 instead of spending $3400 for the Whipple and without spending a lot of extra money for Injectors and fuel pumps,
it would have produced about the same power,,instead I spend only $625 for the stage 4,,,,,,ill owe you all a brewsky

I think you will be very happy with it, good luck and let us know how you make out

[Linn@Amazon]

we just did a Steg STage 4 car install and tune 522HP/527TQ

[Dave B.]

but what about this folklor going around about loosing Torque with a ported Eaton??

Im just driving on the street, cant have that

say that 522 RWHP was that with a lower pulley?

[Big T]

Originally Posted by Dave B.

but what about this folklor going around about loosing Torque with a ported Eaton??

Im just driving on the street, cant have that

There's a link on the steig website about that. The problem was that if the boost bypass is not disabled then you will lose torque. You can manually do this of have it done in the tune (I think). I saw some dyno graphs explaining this. Are you going to do any other mods with this (fuel delivery)? I would love to not have to do them.

[Dave B.]

No im doing doing anything at all to the fuel system, thats the whole reason my Whipple deal fell thru, every single place i went to about that question over what needed to be done when using either a 15 Lbs or a 19 Lbs pulley with the Whipple,

I got a differant answer from everyone, it was the worst, some said with a 15 Lbs only the injectors needed changed, others say fuel pumps, others say fuel pumps, injectors and fuel lines,

but with the stage 4 I dont have to do anything other than bolt it on, dont need to even Dyno tune

[blk04cobra1]

Originally Posted by Dave B.

No im doing doing anything at all to the fuel system, thats the whole reason my Whipple deal fell thru, every single place i went to about that question over what needed to be done when using either a 15 Lbs or a 19 Lbs pulley with the Whipple,

I got a differant answer from everyone, it was the worst, some said with a 15 Lbs only the injectors needed changed, others say fuel pumps, others say fuel pumps, injectors and fuel lines,

but with the stage 4 I dont have to do anything other than bolt it on, dont need to even Dyno tune

I wouldnt rule all those options out, some have had to add a new MAF, some new injectors, some new fuel pumps...the worst thing you can do is starve the motor...oh and you will want to get a new dyno tune .

[Dave B.]

guess ill ask that question to you Stage 4 folks now,

How many of you had to change out injectors?
how many of you had to change out mass air meters?
how many of you had to change out fuel pumps?

Steigemeier says the meter on the car should read the additional air just fine up to about 6200 RPM, since theres no power above that anyway, seems ok to me,

[scrmngdave]

Dave B, I'm sure all the other guys here running the ported stieg blowers can fill you in on each particular combination, they're all different, and each car will experience different requirements. My particular combination, stage 4 port, 2.75 upper, 2lb lower, required only the mass air and injectors. I have seen other guys that required only the mass air upgrade. No matter what, you will most definately need to have the car re-tuned for the blower. At that time, any shortcoming of the electronics or fuel(MAF or INJ) will show up. You won't be dissapointed with the power or the money you've saved, even if you do have to upgrade the MAF and INJ.

[Dave B.]

how will I know if I need that other stuff??

I have an AEM Wideband, but before I had my last Dyno tune, my wideband did not show any issues at the time but the Dyno air/fuel did, all that aside, will it run screwy?

[blk04cobra1]

The car on the same tune, plus the ported blower will run screwy. It's adding 50hp, so you have to compensate for that in the tune. Your dyno readout will show if your pegging the MAF, your datalog of the fuel pump duty cycle will show if you're maxing out your pumps. I just want you to get the most out of your car, safely...not just trying to get you to spend more money.