how well does Porting an Eaton work?

[Dave B.]

I came to the conclusion that I just dont want to spend the coins to buy and install injectors and Focus pumps, and that I would just install the Whipple with the 13 LBs pulley that comes on it, thats about $3700 plus $250 for the tune, then I was told with my 2.76 pulley I have on my Eaton, if I just had my Eaton Ported, I would end up with about the same power and Torque as I would with an Eaton with the Whipple and its 13 Lbs pulley,

What say you with ported Blowers?? theres no since in me spending $3950 if im going to get the same or close to it, for $450 compleat, tuned in all.

[Big T]

I've been pondering the same thing. I guess what you have to consider is if you will be satisfied with the power from the port. I'm sure you will love it at first but will be looking for more in a few months. You could get a lower pulley after that. But will you have to then have to get the bigger injectors and mabye a BAP? The good thing is that you could probably do the mods yourself and stay away from that shop you've been dealing with. The whipple or Kenne bell will give you lots of power to play with but you know you will keep pushing for more and that will just eventually lead to other upgrades $$$ or broken parts. I can't make up my mind.

[Dave B.]

I know that once the Eaton gets ported thats it for power, I would very much like to here from two or more of you out there that have actualy ported Eatons and what exact numbers on the Dyno you have,

the other thing is I have a 2.76 pulley now, I do not think I can put a lower pulley on without going to something like a 2,93 upper can I??

[Pro-Dyno]

Very well stage 4 port job 2.8 uper and 4lb lower 520-530 rwhp sae we have done 3 in the last month all about the same scrmngdave vbmenu_register("postmenu_168285", true); next post down hase this set up finished it thursday night as for your pricing that seems a little low for a good port and tune i think the port alone is $500-$600.

[Ram77mus]

The Stiegemeier stage 4 is GREATTTTT. I was VERY happy with the power mine picked up from a old Apten port vs stage4(old Apten 481hp/511tq vs stage4 531ph/564tq). I love it , and all the other's we've tuned in the past mounth or so have worked great . I think everyone should try it be for you spend BIG buck's on KB or whipple. The port from Stiege. is only $545 and well worth it. O'ya every car that makes 500hp plus gets a Stiegemeier 500hp club T-shirt from them, so that mean bring it to us and they give you a T-shirt - funny how that works. my set up: stage 4 -2.8 upper/ 4lbs lower- ported stock throttle body and plenum- UPR cold/air intake - my ice box - offroad Xpipe- MagnaFlow c/b-and "THE TUNE"

[scrmngdave]

Ditto on the port!! I was in the same dilema as you guys as for porting or going whipple? hmmm!? Went with the port and the results speak for themselves! I use a 2.75 upper and 2lb lower, the result is still 16lbs of boost. Steigemeier recomends running their ported blowers at 16-17lbs, so thats what we do. True, you will eventually get used to 530rwhp and 530rwtq, but it should take quite a while, and then maybe spend the money and get the kenne bell or whipple. Oh yeah, I do use the 60lb injectors, but no BAP, the rest of the fuel system is bone stock! So is Robs car. The stock pumps and lines will support 550. Think of it this way, go with the port, when you're ready to step up to the KB or whipple, you can always sell the ported eaton and get your money back out of it. A ported eaton is always worth more than a stock eaton! Good luck

[ausie]

I would almost ponder the same question. From all the hype about the twin screw supercharger (whipple or Kenn Belle) as it seems it is the only positive displacement unit design that actually compresses air between the rotors where as the Eaton (roots design) only pushes the air and the compression takes place in the lower plenum area. However, the M112 is a modified Roots type which is a bit closer to that of the twin scew than a traditional roots blower. What makes the Kenn Bell or Whipple attractive is the displacement size of 2.2L(kb), 2.3L(w) or 2.4L(kb) which will provide more air flow than the Eaton M112 which has a much smaller displacement of 1.9L. Porting the Eaton will effectively increase the flow rate but reduce the air velocity since the air is not getting forced through a small output port which should also result in lower discharge temperatures. Comparing a Whipple or KB having a displacement of 2.2L or larger to the small 1.9L Eaton having the same psi output is pointless since the whipple or KB have a larger flow rate (more volume of air). In essence, you should get more HP/torque from a 2.2L blower than a 1.9L blower at the same PSI value. Also to maintain the same flow rate with the smaller blower, it has to spin faster than the larger unit which will increase the discharge temperature but if it is ported, the increase in discharge temperature will be lower than that of one that is not ported. Lower discharge temperatures allows for more advance timming resulting in more HP and Tourque.

[ausie]

oops, forgot this part, porting the Eaton should also reduce the hp losses to spin the rotors since the flow rate is less restricted than if not ported.

[Texaslawdawg]

Steggy ported eatons are awesome! with a little spray you can see 600rwhp pretty easily...

[scrmngdave]

The description that Aussie gave was awesome, and basically explains why the fuel system must be upgraded when you bolt on a KB or Whipple, even at the stock boost level. The ported eaton will give comparable power, at a much lesser dollar amount, $600vs$4,000. And, with some 60lb inj, your stock feul system will support the power.

[Linn@Amazon]

there is a possiblity that you will still need to do fuel upgrades and a MAF with a ported Eaton. only the data will tell once the car is getting dyno tuned but we very rarely see an install that doesnt need some upgrades done.Especially if the car is over 500HP.. Each car is different so it hard to say for sure. you need to be aware that this could be a possibility for your vehicle.

[Rockets04Cobra]

Well, I've got a KB 2.2L that put down 597rwhp at 5900rpm on stock pumps, 60lb Inj, and no-boost a pump (BAP). My SCT tuner wanted to test out the stock fuel pumps with 60lb's just to see what he could do, but pressure drops to pump before redline, so 6k rpm is all we could take it up to before it went above a 12:0 air/fuel ratio.
The KB BAP should get us up to 630rwhp on a 91octane tuning, I am going to say around 16-17deg timing, with Stock Fuel Pumps, and on 18psi.
I'll know here in about 2 weeks hopefully, when I get some time to put on the BAP and re-tune it. I'll let you know. I think to hit above 650+hp to the rear wheels might take a pump upgrade and thicker wiring to fuel pumps.

[Rockets04Cobra]

Originally Posted by Linn@Amazon

there is a possiblity that you will still need to do fuel upgrades and a MAF with a ported Eaton.

I too would look into whether another MAF is needed before you get it onto the dyno Not sure if 500rwhp pegs it, but it will be getting close probably.

[Red03]

I have to agree with all the Stiggy praise. I have Stage III and wow what a difference. Stiggy ported the blower, intake and TB in mine, I also added 2.93 billetflow pulley adn the idlers, and Dan at Pro Dyno did the tune. Before the port my car made my mods where Stock headers witha full catted Bassani exhuast, and A K&N FIPK. Numbers before where 435 RWHP and 395 RWTQ, after port and pulley 490 rwhp and 480 RWTQ. Could have got more out of it but my MAF was pegged, and Dan did not want to go any higher. Not sure how much PSI I'm pushing, I don't have an aftermarket gauge. But I can tell you it pegs the stock gauge quick. When I return Iraq, I'm going to go with 2lb, maybe a 4 lb lower, and a larger MAF. And of course a new tune from Dan, hopefully that will put me up over 500 RWHP, and 500 RWTQ. I'm hoping I don't have to change the pump, anf injectors. But as ATS said every car is different, I've heard of some that needed to change and some that didn't.

If you go with a 2.76 you will probably have to change the MAF for sure. I would also recommend a aftermerket heat exchanger, cause spinning the blower faster generates more heat. I have a Gords Ford in my car and very pleased with it. ATS, and LPF both sell quality products and you can use the club discount. Not a short answer to your question but I thought you should have the information. Hope this helped.

[Dave B.]

ok thanks all, very informative,
Im going to go with Porting my Eaton, and if im correct in reading all these posts, I am only running a 2,76 SC pulley, and just the stock lower,

will I get a very large noticable gain by having a 2 LBs lower installed and still us the 2,76 upper??

I was told some time ago that I could not use the 2,76 upper if I have a lower of any size installed,,,,,yes, no , maybe???