Beaflag VonRathburg

iTrader: (176)

I know it would be much easier to order the harrop, but for someone looking to take on a major project with plenty of time what all would be involved with fabricating something like this? Not to mention save some $$$.

What would be the ideal tb size for lets say a h/c 346? I know Harrop has the 52 and 55mm versions available. What would be done with the sensors, TPS and MAP? What would be some ideas for adapting an efficient filtering system without restricting flow and still maintaining adaquate clearance?

Things I've noticed in random order.
1. Fabricating the plates for the tbs and adaptors to mate to the intake ports
2. Drilling and tapping for injectors
3. Fabricating adapters for the tbs to intake ports
4. Fabricating throttle linkage
5. Moving sensors

I know I'm missing a bunch here and would really appreciate serious help. Hopefully we can avoid people saying, "If you have to ask than you can't do it." Just trying to learn here.

Phoenix 5.7

iTrader: (7)

since Harrop designs the intakes to work on an LSX, im guessin it incorportates those sensors into the design.

Beast96Z

iTrader: (21)

Yes, it does. The harrop has provisions for all the sensors/vacum lines/ and even stock fuel connectors. The only thing that won't work is a MAF, obviouslly.

FieroZ34

iTrader: (1)

I could look at pictures of these things all day long.

http://www.verycoolparts.com/Stack.htm

Beast96Z

iTrader: (21)

Nope, it's still sittin on the kitchen table. I'm wippin a broke *** right now, but the old lady just went back to work. I should be back on track shortly.

There is still a common tube that connects all the cylinders that runs along the bottom of the intake. All the sensors work. This includes MAP, IAC, and TPS.

JL ws-6

iTrader: (50)

When you get that intake on the car, please take pic's, one reason I never considered it as an option was beacuase of the very good chance that it wasn't gonna fit on the f body due to teh cowl.. if you have no probels fitting it on with the air filter ***'y, I think I'll ahve to rethink that as a possible future option again.

Beast96Z

iTrader: (21)

I'm deffinatlly gunna take pics through the process. I'll be posting a write up on it as well. I have to do all this for Harrop anyway since they are awaiting my fitment results as well. I don't see a problem fitting the intake alone under the cowl.

Like I mentioned earlier in the thread, the Harrop air ***'y sucks ***. Dyno results givin to me by Harrop show the filter boxes knocking the power all the way back to FAST 90 levels. I ordered my intake with no boxes and no plate to attach the boxes to. I plan to figure out filtering once I see how much room is left under the hood. I figure I can come up with something better, but I'll have to see what room will allow.

Argon Z

[IMG][/IMG]

That is the kinsler.com manifold. The car idles fine.

wolfy

iTrader: (1)

sorry for the off topic reply, but...

argon, you have anymore pics of the progress on the car? i kept up with it for awhile but i havent seen anything since the body mock-up...PLEASSSSSSSSEEEEEE?!?!?!?!?

Argon Z

https://ls1tech.com/forums/conversions-swaps/569385-pictures-completed-autocross-race-street-car.html

JimMueller

iTrader: (9)

I'd like to know this also...specifically, LS2/L92 compatibility.

Beaflag VonRathburg

iTrader: (176)

I know they are working on a LS7 model. L92 I doubt they would even think about doing it now. They are largely unproved and I guess if we do eventually see one it will be much later from now.

Taspeed

iTrader: (1)

The way I look at it, a standard intake setup on a large side for the ls1/2/6/7 setup is 90mm feeding 8 cylinders. An ITB setup is 45+ feeding each cylinder. That would make the VE of each cylinder roughly 2x better. Nothing bad could possibly come of that

FieroZ34

iTrader: (1)

Not quite. The VE of a cylinder has to do with every component of airflow, including the filter, the pre throttle blade tract, the throttle blade itself, the lower intake tract, then the all-important cylinder head. Furthermore, you have to realize that in the stock application, you aren't getting air for all 8 cylinders through a 90mm throttle body simoultaneously. You are realistically just flowing enough air for one, maybe 2 cylinders at max at any one time through the main throttle body. If all 8 were to have identically timed intake events, you'd get just under 8cm^2 per cylinder, which isn't exactly performance inspiring when a 52mm ITB setup gives you over 21cm^2.

That being said, this is sorta off from the ITB thing, but I've got a question. GM has alsways been good about using a decently sized throttle body for stock outputs and applications. So how do they justify using the same sized throttle body on a 400hp, 6/0l, 6500rpm motor as on a 505hp, 7.0l, 7000rpm motor? Seems to me the 90 is way oversized for the LS2, or the 90 is a serious restriction for the LS7.

Beast96Z

iTrader: (21)

I believe the Harrop is going to become less desirable now that they have increased their pricing. They increased the price about $1500 USD over there already high pricing. Pricing for the intake is about $4350 USD, plus about $400 to ship it to the US now. It wasn't really desirable before, but now it really isn't.

Phoenix 5.7

iTrader: (7)

if somebody is really considering an ITB setup, they could probably have one fabbed for close to or less than 4750

FieroZ34

iTrader: (1)

Probably.

I am into mine about $1400, and it is not nearly complete, and is for a V6. This thing better add more power than a GT35r, because it's costing just as much. For those who care to look, mine came from TWM Induction.

Big-DEN

On these the "cross ram" design appears superious in my eyes due to:

1. Longer runner length, even the highest RPM apps on pushrods like 6-8" minimum of runner in the manifold.
2. Intake is a continiuos extensionof head. On these designs the runner manifold direction and taper is preserved, there are no bends, change in taper at head to manifold interface.

Should work well.

A-man930

iTrader: (2)

Well then... how does this work? I mean, how is the engine throttled? Do you still employ a TPS and fool the computer into thinking there's a TB?

topperge

Guys, I have one of these installed with a full custom cowl hood design on my 408 in my GTO. Its a beautiful piece of art, I would have dyno numbers by now but one of my heads had a hole in it and is currently being replaced. So hopefully within the next few weeks I can get some numbers up for everyone. There is a US distributor for these now so you don't have to buy them through Harrop but they aren't a sponsor on this board. And yes, the pricing shipped to your door is still right around $4k the US dollar has taken a dive in the last 6 months raising the price by almost $500.