LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

SStrokerAce, update on LT1 intake?

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Old Jun 9, 2004 | 07:27 PM
  #46  
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Ooo, vortec intake, that's interesting.

Anything that we can find reasonably priced I'm all over it.

D Moss
Old Jun 9, 2004 | 07:53 PM
  #47  
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not jack this thread...RacePrep is onto something it seems alos with an intake for LTx motors
http://impalassforum.com/noncgi/ulti...c;f=1;t=007450

the damn price tag is what blows....leaves most of us in the welded and ported stock intake realm
Old Jun 9, 2004 | 08:28 PM
  #48  
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They're stating ~$1800 in the last post there.

I'm not going to knock anything til I see some numbers but I guess it's still free to speculate. No doubt some will be offended.....

Doesn't look like they're going to get too much runner with that intake, even if they extend them up into the plenum. The stock LTx is what... just short of 3", so hey I'm curious how much runner length we're adding there?

And runner taper? Just an extension of the original runner or a different port entirely?

I'm still putting my money towards the single plane carb intake and that's not to take anything away from the guys at RacePrep. Just my thinking as it stands.... and that's always subject to change.

-Mindgame
Old Jun 9, 2004 | 09:35 PM
  #49  
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By looking at that, all I need to do is go get some plated aluminum, box in the top of my existing intake about 1" to 2" higher for more volume, and add to the existing runners that is already there.

That's not worth $2000 in my book. That's not worth $1000 in my book, nitrous doesn't cost that much, and there's a lot more to gain than 40hp.

Welding wire and plated aluminum doesn't cost that much either.

just my .02

D Moss
Old Jun 9, 2004 | 10:00 PM
  #50  
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Is it going to be possible to retain cruise control with a single plain conversion? I am very interested in seeing how this turns out for you guys. I'm getting ready to do heads and cam and I may convert as well.

Adam
Old Jun 9, 2004 | 10:07 PM
  #51  
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I'm not sure who got on the whole single plane idea, but this isnt a single plane we are doing.

Originally posted by LeftoverChinese
Is it going to be possible to retain cruise control with a single plain conversion?
Adam
If you put an elbow on top and fab up a way to mount a regular throttle body, then yes you could retain it. I don't remember off hand if 4bbl's have provisions for cruise control.
Old Jun 9, 2004 | 10:23 PM
  #52  
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I have been talking to Bret about this quite a bit over the last couple weeks. All I can say is that the design is extremely simple, not at all in the work the Bret does or how the intake performs but how easy it will be for someone to just drop this in and have fantastic results. With there currently being nil in the way for after market intakes for our motors this IMO sets the standard. With converted single planes you have to worry about elbows, cutting the hood/aftermarket hoods, different throttle bodies etc. In the long run alot of customization can come into play.

Race Prep's intake looks nice but the whole idea is to get away from the LTx casting. All the area's the LTx intake design lacks Bret improves as he already commented on.

I think there will be a waiting list soon if one hasn't started already.
Old Jun 9, 2004 | 10:57 PM
  #53  
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Originally posted by Mindgame


Way back up the thread someone mentioned the Vortec intake. Got me curious. Do you (poster of that suggestion) know for sure that that intake will work? GM builds a Vortec Eliminator intake (single plane like a Victor) so I'm just curious.

-Mindgame
What do you think of the top two manafolds on this page. We were looking at the victor EFI..but looks like they are planning the same thing on the super victor. Acording to the port measurments it would bolt up to some lt4 with the GMPP lt4 gasket.....of course after redriling the holes.

http://www.edelbrock.com/automotive/...ictor_efi.html
Old Jun 9, 2004 | 11:03 PM
  #54  
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Jesus boss you're killing me with the long post but keep at it!

Originally posted by Mindgame
Very impressive Bret!
Thanks, it was a fluke call too guy dialed my number on his cell on accident, but either way good news.

Originally posted by Mindgame
Let me reword this in saying that IMO the Vic Jr, Super, etc have about the right length runner for these 6500-7000 rpm lt1 builds. Not only does it have the length, it has some taper. So it's gonna tune like you're saying but it's also not going to want to revert like these ultra long intakes I mentioned (L98, superram etc). Don't know if you've messed with those alot Bret but it's not uncommon to pull the cover and see fuel dripping out the runners on the superram. Camshaft specs have to be right on for those intakes to work right. Guess that's why Lingenfelter designed so many cams specifically for them.... most being short duration (very little overlap).

About how long are the runners now? So essentially you have more plenum volume and a shorter runner??
Yep the Super Vic is perfect for most street small blocks, but yet so many people don't agree. Probably because they are not looking for 500-600+hp on a street motor.

Not telling runner specs, that's like cams specs boss ;-) The runners are longer and for the plenum well..... We filled it up with almost a 12 pack, but the problem is that we should have drank the beer first not after, didn't taste quite as good pooring it out of the plenum.

Originally posted by Mindgame
I have an Edelbrock 2975 and two Brodix intakes.... the HV1000 and a HV1003. I'm not sure which we'll use, nor are we opposed to going to a Super Vic. Most likely it'll come down to space under the hood (Harwood probably).

We have discussed using a 4bbl throttle body and a K&N 14x3 with the xtreme flow lid. Then seal the thing to the underside of the hood and pickup air from the cowl opening at the rear... ala old school.

That or run a shortened elbow and a LSx style throttle body.
Yeah that's why I wanted to make something that will work, single planes are great but are not bolt in and since we are EFI we don't have wet flow issues or have to worry about fuel distribution.

Originally posted by Mindgame
Either way, much of my curiosity with what you guys are doing is simple.... I might be giving you a call here sometime soon. No sense in treading new water when someone's already been there. I might be bringing you some business.
Why thanks. I always think that way on things too, but when nobody solves the problem gotta make a solution yourself.


Originally posted by Mindgame
Yeah, I'd need to work this around the GM 487 or 481. I'm thinking it might be worthwhile. A bit greedy but worthwhile.

That -10X AP head is a real monster of a 23º head, no doubt! Is that a new WeldTech job? Never seen that one before...
That is one of the best 23 deg heads I have seen in terms of power numbers. It really rivals most 18 deg heads in that department.

WTF castings are you talking about there? Hate to say I can't find them but I'm clueless. Not the 18deg 364,580 or 855 castings and not a SB2 or splayed valve, not even a Bowtie or Pontiac head..... got me

Originally posted by Mindgame
No, my next crazy stunt...... aluminum Dart talldeck (~450 ci) with 18º or canted valve heads. Shoehorn that into the 4th gen with the help of BMR and say goodbye to the LTx block all together. I have the block, just need to round up the other parts to make her fly. Turning 6500rpm with that one should prove interesting. Oh yeah, it'll be a street car too.
How about a 18X Brodix with a HR Cam and 427+ cubes......

Still I would go with a Splayed Valve and a Wilson Intake if I was going crazy.

Bret
Old Jun 9, 2004 | 11:17 PM
  #55  
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Originally posted by simple
ballpark price figures?

if all goes well do you have plans of mass producing?
ballpark pricing figures?
I'm guessing around $1800 for a LT1 head setup and $2000 for a AFR/LT4 setup now. No Core, No Fuel rails to buy etc...

Pricing is based on the work going into it and not just the market. If it was based on that I think the results would warrant a higher price than the competitiors

Mass production would work better if the company who made the casting the first time called me up and said here is $100K can we cast these puppies up? Hell yeah!

Mass production will be 2-4 a month at the most since it takes a while and I have to do other things in the shop.

Originally posted by simple
how are the intake runner openings gonna fit stock ported LT1 heads, as opposed to larger heads (LT4 and bigger AFR's etc.) or does that not matter much?
As it sits zero port matching is needed for a ported LT1 head which is the point of this exercise. The additional $200 (as of now) is for the AFR/LT4 heads because it will need some and some welding to go along with it. To port match them correctly a set of heads would need to be in the shop to do it.

Originally posted by simple
will this be a direct bolt on intake (no quirks)?
That's what we are aiming for


Originally posted by simple
do you feel the stock throttle body will be a restriction mated to this intake? i see mentions of 58mm and monoblades is why i ask
Yes, a 48mm or 52mm will not be optimum here, and the intake is going to be cut for a 58mm or a Monoblade if you want ($30 more) The motors should make power to the point where a bigger TB is needed because of the power levels.


Originally posted by simple
why wasnt the stock casting used as a basis for the project?
Stock Casting is a waste for something like this, I would have to do more work than what it takes for me to convert one over at this point. I can convert a SBC intake to a LT1 bolt pattern and when it's on the motor you would think it always belonged there.

Bret
Old Jun 9, 2004 | 11:25 PM
  #56  
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Originally posted by dmoss69
Wouldn't LT1 intakes be the easiest to fab up since there is no water ports and jackets to take into concideration?
No, converting a SBC intake is easy for me at this point and in the end looks like it belongs on a LT1 intake.

Originally posted by dmoss69
Flat plate in the lifter valley roof, another flat plate across each head with a flange port matched to the heads, and then 8 runners up to a single plentum.

I made this sound way too easy! Of course, you know I've never done anything like this before. I've just seen one my buddy made for his 383 dodge engine, so if I need to stick with my stocker, just let me know.

But if there is a way for me to fab one up, I'll try it.
Good luck, I could do this out of plate Al if I wanted, but that's just more work and more fab time. What you are paying for with something like this is the R&D, the design, and the LABOR! The key to most race motors is LABOR not the parts, even though most of the parts cost more. Think about head porting, why does that cost so much, it's not the Ferrea Valves and the Castings, it's the grinder, Serdi, flow bench and knowledge you are paying for

If it was a casting that was then CNC'ed we would be looking at $500 at the most. If I was going to do a full sheetmetal then I would do a vallley cover, intake flanges and plenum out of Al plate and have the runners CNC machined out of Al blocks to get the right runner size, shape, tapper etc.... Seen some nice 4.6 Ford Wilsons like this, problem is they cost $4500-$5000 for those intakes! So you sure you still think this is a cut and weld deal? It's not just the fact that you can cut and weld Al it's knowing what to make.

Bret

Last edited by SStrokerAce; Jun 9, 2004 at 11:43 PM.
Old Jun 9, 2004 | 11:35 PM
  #57  
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Originally posted by Mindgame
They're stating ~$1800 in the last post there.

I'm not going to knock anything til I see some numbers but I guess it's still free to speculate. No doubt some will be offended.....
Yeah the price point is an issue, but if you don't have to build a stroker to get the HP and TQ $1800 ain't so bad anymore. That's where I am going, a larger plenum is not going to get you there by it self. The stock one could be larger, true.


Originally posted by Mindgame
Doesn't look like they're going to get too much runner with that intake, even if they extend them up into the plenum. The stock LTx is what... just short of 3", so hey I'm curious how much runner length we're adding there?

And runner taper? Just an extension of the original runner or a different port entirely?
That's what I was thinking too..... That's why I said F^*( the LT1/4 intake. I do have some ideas with that but it might cost as much to do and make less power. Still I might do a intermediate one just to try that out.

When you use that intake you can't do too much to it and the casting sucks as far as the port itself goes. The only thing good is the injector placement and angles on the LT1/4 intake and it looks like that gets changed big time there.

Originally posted by Mindgame
I'm still putting my money towards the single plane carb intake and that's not to take anything away from the guys at RacePrep. Just my thinking as it stands.... and that's always subject to change.
MG I was going to do that route for a long time, and then BAM I saw some thing and said sh|t I can do this the easy way and still get all the runner length, cross sectional area, plenum volume and TB placement that I want all under the stock hood. The single planes out there are very close to what I wanted in length, cross section and taper angle but didn't fit everything I wanted.

Bret
Old Jun 9, 2004 | 11:38 PM
  #58  
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Originally posted by 96z
I have been talking to Bret about this quite a bit over the last couple weeks. All I can say is that the design is extremely simple, not at all in the work the Bret does or how the intake performs but how easy it will be for someone to just drop this in and have fantastic results. With there currently being nil in the way for after market intakes for our motors this IMO sets the standard. With converted single planes you have to worry about elbows, cutting the hood/aftermarket hoods, different throttle bodies etc. In the long run alot of customization can come into play.

Race Prep's intake looks nice but the whole idea is to get away from the LTx casting. All the area's the LTx intake design lacks Bret improves as he already commented on.

I think there will be a waiting list soon if one hasn't started already.
BTW Matt has a casting in the shop for his 383, so here is where our mule intake testing on a LT4 headed 383 is going to be.

Bret
Old Jun 9, 2004 | 11:41 PM
  #59  
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Originally posted by dmoss69
Welding wire and plated aluminum doesn't cost that much either.
On this intake I use one 3' by 6" by 1/2 thick plate and it's $60 my cost. Plus another piece of 2" x 3' x 1/2 for parts and some more for other pieces. Then you have stanless screws etc.... Now throw in proper welding (easy $100-$200), then the machining....

Doesn't cost that much true, but then again the guy doing the work needs to get paid. I don't know about you but my e-mail address doesn't say bret@salvationarmy.com.

Think about that, I don't know about you but I feel that what I do day in and day out is worth what I get paid and the power numbers represent that.

Bret
Old Jun 9, 2004 | 11:56 PM
  #60  
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Bret,
DO you sleep? Everytime i think i have read it all.. You post again!!



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