Slowsome

Yeah I cant swing fixing the 416 now, gonna run the stock engine and may put the 416 in a different chassis later on... But with the overdrive and a 3.5 pulley it made 15 psi on the stock cube set up..... So I figure we will need a 3.7 or so to get 12-13 psi I'm thinking... I am gonna run the 3.5 and put a restrictor in mine.... I have a couple of sizes cut out to get me where I want to be...lol the restrictor will give me more torque down low.....

KSP387

You better hurry.....



I'm going to stripe that JSB Vette

WickedVetteLT4

Oh ok. Makes sense man. I may just get the 3.8 then that A&A carries unless I can find a 3.7. I def wanna stay in the 11-13 area. Closer to 13 the better. Restrictor plate sounds like a solid idea. I'd do the same but I hear the A&A kits don't respond as well to them. Something to do with the inlet piping or something... I don't know. Guess I could always order the ECS 4" inlet piping alone and that's the only thing I'd need to make my kit work like ECS's kit to use a restrictor plate. That might be a solid idea for torque purposes.

SteveDoten

ran mid 9's on the T-trim? why mess with a proven setup?

What did Josh tell you to do?

that's all i got bud.

WickedVetteLT4

Yeah, it was a solid setup. I'm not changing it because I want to. My T-trim crapped out on me. Josh said order the Ti-trim and bolt it back up and run with it. I bought the YSi because I have intentions of building the motor sooner or later so I figured it was the way to go for the long run. Ti would undoubtedly be better for now being on the stock block but the YSi has so much more potential once the car is built. When I explained all of this to Josh, he said I'm better to go with the YSi if I really do plan to build the block soon.

But I've been on that fence because the Ti would work for now and could still be spun to 850 rear wheel or so which is very close to my goal. I'd like to make 900ish when said and done.

gotjuice?

A&A's intercooler outlet is 3.5 inches.

WickedVetteLT4

Is that the only other difference? My piping from the intercooler to the mass air is solid 4" as well I believe. The inlet where the restrictor plate would go would be on the inlet side of the blower. A&A has the big plastic intake that the filter connects to and ECS uses a solid pipe like the one from the intercooler to the mass air.

Slowsome

Better get it back home before you talk trash haha ..

Slowsome

My ECS kit uses a plastic pipe from the filter to the blower inlet... and like you said the restrictor pops in the filter before it goes in the blower.....

WickedVetteLT4

Really? Well it was explained to me that the difference was in the inlet pipe. If yours is plastic too, I wonder what the reason is that the restrictor plate works better on the ECS kit than the A&A kit?

DSteck

93 + meth

This guy beats the hell out of this thing, and somehow it is still ticking. He's Kafood on the forum.

WickedVetteLT4

Nice! That thing makes power! What blower is that he's running?

I'm really wondering if the self contained unit is really an advantage over oil fed? Seems oil fed would be easier once installed because its maintained with oil changes all at once. I really don't know the pros/cons though between the two.

Every time I think I'm going to install the YSi since I already have it and be done with it, I go back to thinking maybe the Ti would be better for now and still get me where I want to be later. Toughest decision I've had to make with the car thus far but I need to decide ASAP and run with it to get this thing back together again.

Slowsome

Ive got an Inline filter in the return line for mine, just incase something in the blower does go down..... Has to help some..... PLus the oil fed units run cooler than the Self contained...

Skunkworks

Both A&A and ECS have a plastic blower inlet tube (air bridge, dongle call it what you will), the major difference is in how the kits create the necessary clearance:
- A&A drops lower radiator support straight down with spacers (cylindrical bar stock cut to length then drilled)
- ECS drops lower radiator support down and forward using plate adapters.
So with above said, the ECS air bridge has a gentler bend than A&A. This does not change if a restrictor disk can be placed between filter and air bridge.

The reason ECS has a better track record with restrictor disks, is because of all the testing they have done. A restrictor disk simply creates a pressure drop at blower inlet (like going up in altitude), which allows blower to be spun higher. But care needs to be taken that the pressure drop vs. velocity does not exceed blower curve, both are exponential in nature.

WickedVetteLT4

That's actually a really good idea. And being on the return line, if it slows flow a bit, its not a big deal. Ill prob do the same on mine. I'd imagine there is a lot better chance of the blower sending trash to the oilpan than the motor breaking something and sending it into the blower anyway.

lt1z

Id run the 3.8 pulley with the YSi and OD balancer on the stock motor.

WickedVetteLT4

Oh ok. Makes sense. So... the restrictor plate should really work just as well in the A&A kit as the ECS kit. I may go that route then.

And I think I'm understanding the pressure drop vs. velocity situation. In other words, running a pulley that makes 15 lbs and using a restrictor plate to bring it down to 12 or 13 would prob be ok but running a tiny 2.7 pulley that would make 20 lbs of boost and trying to restrictor plate it down to the same 12-13 lb point would be a bad idea. Too big of a difference. Is that right?

WickedVetteLT4

That was exactly what I was thinking. Slowsome said his 3.5" pulley with the OD balancer is putting him at 15lbs on the YSi so the 3.8" would prob put me in the 12 lbs range or so. His 3.5 pulley and restrictor plate idea sounds pretty good though to keep torque up and save some of the low and mid range power. I just don't have any experience running a restrictor plate but if I can go his route and do that to keep the torque and low end power, seems like a winning solution.

Skunkworks

Yes because you'd loose power in some spots (too much restriction), also discharge temperature would be too high for the work being done (due to compressor being off design).

So in mild form it does work well, especially when looking at bang for your buck.

WickedVetteLT4

That makes sense. So if a 3.8" pulley would put me where I want to be with the OD balancer alone, would the 3.5" pulley and using the restrictor plate idea to get to the 12-13 lb range be the better route to go?

Seems like that would be a mild enough change to keep the blower working efficiently.