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-   -   LT1 roots blower intake (http://ls1tech.com/forums/lt1-lt4-modifications/424442-lt1-roots-blower-intake.html)

NXSLT1 12-19-2005 02:52 PM

LT1 roots blower intake
 
Been working on a blower intake for my car, just thought I'd post a few pics up. None of these pieces are finished but it gives you an idea. Why am I building this you ask?? Well, if all the measuring I've done is right then I will have a roots blower on my car WITHOUT cutting the cowl. Never know, I might make a few kits if it works out good and there is interest.

http://i12.photobucket.com/albums/a2...1/DSCF0024.jpg

http://i12.photobucket.com/albums/a2...1/DSCF0028.jpg

http://i12.photobucket.com/albums/a2...1/DSCF0031.jpg

buffman 12-19-2005 03:41 PM

Boy do I love having extra cowl clearance unlike you F-body guys. I'm sure if you wanted some help you could ask Keith Mease from NJ about the Roots blower setup he designed for us B-body guys.
Matt

Sgt. Spuds 12-19-2005 03:52 PM

Nice work, looks a bit rough though, is it just a first run? Or the actual product. Keep us informed!

NXSLT1 12-19-2005 07:11 PM

I've seen pics of the blower setup for the B body cars, it's too tall. Mine won't be the typical sheet metal intake. The top will be flat and even with the top of the sides, no runners just a big open plenum. If I didn't have to work all the damn time I could get something done on it.

As I said in my first post these pieces aren't complete yet, still gotta drill the holes in the side pieces and cut the other end of the bottom piece, but if yer referring to it being rough as in not being polished or something well, it probably wont be polished, too much work.

Soon as my angle vise gets here I'll drill the holes in the sides then bolt them up to the motor to get a measurement for the top piece. I haven't made up my mind exactly how I'm gonna do the top yet, got a few ideas though. After I get everything for the intake cut and welded up then I have to start on a CAI.

95formulalt1 12-19-2005 07:18 PM

thats so cool ...doing the work ur self!! good job and good luck!!!!

Cheater 12-19-2005 07:29 PM

MAN what ever you do please keep us posted

97Formy 12-19-2005 08:34 PM

I'm not really interested in a blown setup for myself but I definitely want to see what you come up with. Keep us posted man

DeltaT 12-19-2005 09:08 PM

Looking good.

Are you going to extend the manifold port dividers into your cutouts on the side pieces, or do something else?

I love to see anyone fabricating some performance part - to me that is the ultimate in hot rodding.

Are you going to coat the final piece at all?

Jim

Sgt. Spuds 12-19-2005 09:44 PM

Im in the market for a CAI, so if yours is nice, i'll buy it.

NXSLT1 12-19-2005 09:52 PM

Thanks guy, maybe I can get some more done this weekend (long weekend) and I'll keep yall posted.

There will be no dividers in the intake, sorta like the weiand/B&M intakes for their small blowers. Not the most efficient but I think it'll work just fine.

I haven't decided what blower I'm gonna use either, I need to hurry up and do that. The M112 on the lightnings is too wide at the base, can't fit injectors in there with this manifold, the one on the cobra's would probably fit but the inlet is on the passenger's side best I can tell from pics. Those two are plenty short to fit under the cowl though. I've looked at and measured the Weiand/B&M 144, it would fit but damn they are expensive. I have a GMC 4-53 which is basically what the Weiand 144 was designed after but I need conversion bearing plates for it and the only place I have found that makes them is covered up with work and won't get to them anytime soon. Also a GMC 6v-53 would fit, same height as the 4-53 but longer and puts out 177 ci but again no bearing plates. I'll come up with something soon I guess.

Formula WS6 12-19-2005 11:37 PM

Just out of curiosity, if you don't have some type of runner, won't that cause the air to get trapped in the intake and result in a loss of hp?

If it does, I understand it's not going to be that much of a difference. Don't think I'm criticizing, I just wouldn't want you to go through a big effort like this and have regrets after the fact, or even have it cause a problem for ya. Good luck with the prototype!

NXSLT1 12-20-2005 12:00 AM

I don't understand what you mean by trapped?? It's forced induction, it'll get shoved where it needs to go. Like I said it's probably not the most efficient setup but it must be ok if Weiand and B&M are selling them without runners. I would prefer to have runners mainly for the injectors, to make sure the fuel goes into the intake port it's suppose to. The injectors will be right there at the port of the head anyway but with trying to make the intake and blower fit in such a small (short) place it's dang near impossible to have runners with this setup. I could probably put some really short ones in but I don't think it would make much difference. I'm no expert by any means but we'll see what happens.

Oh yeah, I should have made it with a tented floor but oh well, maybe if I make another one it'll get it.

Dragframe 12-20-2005 12:12 AM

Quote:

Originally Posted by Formula WS6
Just out of curiosity, if you don't have some type of runner, won't that cause the air to get trapped in the intake and result in a loss of hp?

If it does, I understand it's not going to be that much of a difference. Don't think I'm criticizing, I just wouldn't want you to go through a big effort like this and have regrets after the fact, or even have it cause a problem for ya. Good luck with the prototype!


when a valve opens... all the fuel and air will be sucked inthere by the vacuum the piston creates... but in this case the supercharger will PUSH it into that cylinder... if no valves are open.. and one does.. ths upercharger is going to push as much into that cylinder as it can

Fire67 12-20-2005 10:09 AM

Hey if it works for carbuerated motors, it'll work better for EFI.
If it were me, I'd put some sort of divider between the ports to help contain the injector spray. Even if it only protruded into the plenum by an inch it would help...
But then again it may not even be necessary if you get those injectors as close to the port as possible.
Good job so far, keep us posted for sure.

Dragframe 12-20-2005 12:39 PM

Quote:

Originally Posted by Fire67
Hey if it works for carbuerated motors, it'll work better for EFI.
If it were me, I'd put some sort of divider between the ports to help contain the injector spray. Even if it only protruded into the plenum by an inch it would help...
But then again it may not even be necessary if you get those injectors as close to the port as possible.
Good job so far, keep us posted for sure.

that is a suggestion.. i though about it.. but it is unnessecary.... wont help really. THe injector pulses when the intake valve opens and the injector is right at that port.. so that is where it is going to go... shouldn't be a problem

blkchevyz 12-20-2005 12:44 PM

someone did that a few years back, but they cut the top off a stock manfold and used it.

BeefTip 12-20-2005 12:49 PM

i would love to see this when its done!

TonyP187 12-20-2005 12:56 PM

wow, if it comes out nice id buy one from u if i could use it with a good blower like Kbs for mustang

Alvin 12-20-2005 01:20 PM

Quote:

Originally Posted by blkchevyz
someone did that a few years back, but they cut the top off a stock manfold and used it.


I did the orginal one. It was nice and torquey and a lot of fun. I pulled it in favor of a vortech T trim aftercooled. The vortech makes about 100 more HP and the same torque with the same boost.

The eaton was more fun on the stree though!!


I came to t the concluesion that injector positioning didn't matter. Why, Have you ever seen a TBI with the aircleaner off at a idle? fuel is just puddling aorund the TB blades. Also, cars like mine are bank to bank and they don't fire the injectors per intake cycle.. rather 1 bank at one time and the other bank at the other time.

blkchevyz 12-20-2005 01:24 PM

Quote:

Originally Posted by Alvin
I did the orginal one. It was nice and torquey and a lot of fun. I pulled it in favor of a vortech T trim aftercooled. The vortech makes about 100 more HP and the same torque with the same boost.

The eaton was more fun on the stree though!!


I came to t the concluesion that injector positioning didn't matter. Why, Have you ever seen a TBI with the aircleaner off at a idle? fuel is just puddling aorund the TB blades. Also, cars like mine are bank to bank and they don't fire the injectors per intake cycle.. rather 1 bank at one time and the other bank at the other time.

you think it would of worked better on a 94+

was a cool setup, big props to you on that.


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