Would like to know if everyone who have ported superchargers is satisfied with them and no problems they are several vendors doing ported superchargers some even offering 50hp. ???

 

I had REM ported mine and I’m very satisfied! It improved my ET and increased boost.

 

I was say the cons of porting the blower is down time . That's about it. Well, that and you should get your truck on the dyno and check the air to fuel after.

Some of us........myself included, have lost peak torque numbers on the dyno. I picked up almost 25 hp but lost 10 ftlbs. So if your a numbers guys, that could be a con if it happened to you.

Pros.......the hp gain is on avereage about 20. Some have only picked up 10 hp, some have gained as much as 35+. Mph is usually up and peak boost is about a 1lb gain

The key to these ported blower is to spin the crap out of them. I have a 4lb lower and noticed a difference. Was it worth the money on the street......i would say no.........was it worth the money at the track........so far would say yes. I'm running more lower numbers consistant in the heat. Haven't made a non 12 second pass on a day that it hit over 90 and was humid. Before i would see 13.0's and 13.1's. When the cool weather comes, then i'll know.

 

I think thats true. Thats why im adding a 2.8 upper on top of my 4lb lower


Port it man i would do it again if i had it to do over.

 

i think i'm gonna do the same!!

 

ditto

 

This is the kind of answer i am looking for honest and direct to the point i have every kind of mod except ported supercharger since my lightning is a street driven i don't think i will port at this time it will run quarter mile in 12.9's 13's 108 to 109 why port thanks for your input/

 

Question for the techs concerning porting:

Isn't the idea of a supercharger to get the rotor packs as close to the casing as possible without striking each other and the sides? From all the port jobs I've seen, the DECREASE the surface area that the rotor packs would seal against. Exactly how does a ported blower produce HP if this is the case?

Second, HP = (torque*rpm)/5252

If one were to lose 10 ft. lbs of torque, say 450 to 440 and rpms remain the same, hp has to go down, too.

I would suspect that what is happening is that you are losing a little torque toward the low end because of the reduced surface area for the rotors to seal against, but are opening it up a bit so that it breathes a bit better on the top end thereby allowing a little better flow and better peak HP numbers at the top end.

For a street machine, I would suspect this mod is a waste of money. Maybe for the track it's ok, but I'd save the time and money and work your way toward a KB. You'll be a lot happier.

 

 

Of course you're saying that because you have a KB already, but for us lowely people who can't afford to put down some change for a KB (and built block to make good use of the KB) then the ported eaton worked out nicely for me...even on the street

BTW what kind of numbers did you get to make on Saturday Ken?

 

I had mine ported and lost a tenth in the 1/4. BUT, traction was an issue the night I ran the 'after port' run. Based on my slower 60' times on those runs, if I was able to hook and get the same 60s as the 'before port' run, I hypothetically would have picked up 2 tenths. But we all know that this means absolutely nothing.

Since then I've only run at FFW @ E-town and it was too hot and humid to make any good comaprisons.

I honestly didn't 'feel' any difference in SOTP performance. The only thing that is definitely different is that you can hear it whine lower in the RPM range.

This probably isn't what you want to hear because it's discouraging at best, but it's reality and something you have to be ready to deal with after dropping the $$$. Some people have had factual positive results. Some like me have varying factors to take into account, and some just flat out aren't happy with theirs.

Good luck with whatever you decide to do.

 

The key your missing here is PEAK number. Peak hp and peak torque do not occur at the same rpm, so this equation isn't really justifying anything as far as gains or losses with the ported eaton.

Before the port, my torque curve would peak faster.....but drop off alot sooner. Now it take a little more rpm to peak but holds on longer through the rpm range........this explains two things:

1)Justifies the theory behind needing to spin the ported eaton faster to achieve maximum performance. I have a 4lb lower, had it before and after the port. No upper. Spinning the blower faster would bring back more lower end torque while keeping the torque going through the rpm range.

Eluzion has his blower ported the same time as i did. We dynoed at JDM last year together, have almost exact mods, except he has a 2.8 upper with a 4lb lower, i just have the lower and numbers were very similar......MY 416 hp to his 406, and my 522ftlbs, to his 525 ftlbs...(or something close like that).

Put the blowers on, he added a 6lb lower, i kept my 4lb lower. He dyno'd at like 423hp and 551ftlbs of torque I dynoed at like 437 hp and 511 ftlbs. This is pretty good evidence of many people's opinion that optimal performance from the ported eaton is to spin it faster.

2)The difference is felt in the higher rpm range......where you can feel the difference in pull. That's why for street purpose where I am anyway, not much difference felt, aside from when i pull on to the highways, and you can feel the difference in pull, and possibly a gain in peak boost (I picked up a little over 1lb). That's why I think this is more felt at the track where the engine winds out.

As far as loosing time in the 1/4 from it.....you'd have to make quite a few runs........***in same conditions as your previous best runs*** to draw absolute conclusions. If your spinning on the lower end and loosing et, thats not attributed to the blower, that's traction issues.

Again, i'm running right around my best time i ran last year.......in the heat with the ported blower, and the mph, i lost when going to the slicks.......i right back where is was.........but doing it in the heat and humidity. Until the cooler air comes, i wont have a real track comparision because my best time was run in the fall, but i'm anticipating a new number. Hope I've helped someone anyhow

 

I'm trapping a SOILD 3.5mph faster with my apten porting, spacer, and a $12 CAI kit.

I really don't care much about peak numbers. It's kinda cool I suppose? But I really don't care. A flat Torque curve is what moves my big butt down the track.

What impresses me the most is running 12.4s - 12.5s at 109.5mph w/just a few bolt ons (4# lower)
Rich

 

 

You run at Stanton???????????