Our Holley rep is in town visiting. I just recieved the information on the Vortec HSR intake. Everything is the same as the traditional except the bolt pattern. I just added them to our website. Availabilty is they are on order for our wharehouse stock but it may be the end of this month before they are ready.

Holley Stealth Ram

I put together a special just for Thirdgen.org members on the Vortec HSR intake(#7542) and Fuel Rail kit w/ AFPR(#534-193) for $475.00 plus shipping. This is a $45 dollar savings. The special will be good for the whole month of March. You must select the two items above to qualify. All you need to do is when you order by phone mention coupon code TGOVHSR. For ordering online enter the coupon code in the box when checking out. It is case sensitive so be sure to enter it exactly like this. Orders will not be processed until the intakes are ready for shipping. No other discounts can be combined. If you have any questions please call me at 877-516-7223 x302 and ask for David. Or you can email me at david@thunderracing.com.

 

Wow... Awesome!!! Jump on this guys!!!

 

Recieved a couple orders already, thanks guys! Our Holley rep talked to one of his associates today and they told him they are about 30 days out. So if your not in a hurry, put your order in. The sooner we get your order the sooner you will recieve it once they start shipping. Follow the instructions above to do so.

 

Does anyone know if they shortened the height of the plenum or intake at all for the firebird crowd and vette for that matter.

I want to swap this onto my 383, but not wanting to whack the hood bracing.

later
Jeremy

 

Nope, it's the same height. AFAIK there are no plans to change the height either.

 

About damn time. Thank you all above.

 

*sigh* So the idiots asked us what we want and we told them. they have to make a whole new mold for the manifold for the vortec heads and they cant give us a 1/4 inch to help clear things?

Such a shame, when they talked about the vortec version it looked like there would be such promise, at least for them dropping the heighth on the intake, I'm sure they planned onusing the same plenum all along :-(

I dont really want one do to the fact that I dont want to clearance my hood by cutting the braces .

later
Jeremy

 

The plenum portion didn't need to be remolded, only the manifold portion.

Not that I disagree with you though. Woulda been nice for you Poncho/Vette guys.


Can't wait to see some numbers!

 

So if everything is the same, the ports still match a 1205 gasket right?

 

*Cough* CARB approved HSR *Cough*

 

I'm with him

 

I wonder if you could just have a machine shop mill the intake down 1/4" ?? You may have to re-tap the boss' for the pleanum since you milled off 1/4" of it but its sounds feasible and quite simple I would think. Since its basically a tunnel ram intake I dont see why not. Only downside is the RPM range would be shifted up more due to the shorter runners. Anyway just an idea.

 

To be honest guys, there's not a ton of room to really mill the bottom half of the intake. I don't have exact measurements, but if you mill it much, the bracket where the throttle cable mounts will hit the fuel rails. I know people are saying they only need 1/4", but I'm pretty sure if you go 1/2" , the bracket will hit. There would also be potential issues with the throttle body and the thermostat housing, not to mention linkage issues with the 89-up throttle bodies and the fuel rails. Even at stock height, I had to take a bench grinder to the throttle linkage to make it clear the fuel rail on the driver's side. It's not as simple as it sounds.

I had been emailing back and forth with a guy privately about the height of of an HSR and I was surprised myself when I looked at these things.

After I wrote this, I decided to take a couple pics. You decide for yourself if it could be done.

-Dave

 

Another picture..

 

And one more.. (yes, I could've used a better bolt to illustrate the clearance, but you guys are getting what you paid for.. :-)

 

O yeah, i forgot people are already having a hard time getting the throttle to clear the rail Well I guess bird owners are SOL. That really does suck though. The throttle bracket can be clearance safely but the throttle body will deffenitly make contact with the fitting on the rail if you go down even 1/8".

 

I seriously doubt it. If the manifold ports don't line up to the Vortec head ports, the intake won't be worth a damn. Even if it does have the 1205 port sizes, a 1205 won't work because the bolt holes aren't in the right place.

My guess is that all bolt-on aspects are the same, but manifold ports are designed to Vortec manifold specs.

 

You'd think for a company out of Bowling Green, KY, they would have thought about making a TPI replacement product that would work on a Vette.

You may be able to get by milling 1/4" off the top of the base where it meets the plenum box and then the ribs off the plenum box to clear a Forumla hood brace. By doing so, you will have to make sure modifications, but I think it may work. I dont know if this would change the airflow to the runners since Ive not done this.

Problem: the bracket where the throttle cable mounts will hit the fuel rails.

Solution: See pic



Problem: There would also be potential issues with the throttle body and the thermostat housing, not to mention linkage issues with the 89-up throttle bodies and the fuel rails.

Solution: See pic

Using the Holley IAC housing, you eliminate the coolant passage and fittings. this should clear the waterneck housing.





If you use a TB spacer, you can push out the TB so it clears the front of the fuel rail.



Main concern I have is how changing the runner tower height will affect air flow to each cylinder since the HSR uses individual runners unlike the single plane manifolds.

 

There is a guy that makes custom plenums for TPI vettes for the HSR. Do a search on the vette forum. The plenum looks wider and shorter. Also, I think the front of the plenum is angled down slightly for the throttle body.

I'll see if I can find a pic.

But that plenum would work well in a firebird or other cars that would have hood clearance issues with the HSR.

 

Vette noob,

Those are some of the same things I was playing around with. I do not want to run it if I have to cut my hood.

I will do anything streetable to my car, but chopping body panels to run an intake starts pushing those limits.

another one I thought of was to make custom fuel rails, you can do that without blowing the bank and clean up some of the oversized mess that their fuel rails appear to be.

later
Jeremy

 

"Grumpyvette" from DigitalCorvette and Corvetteforum was selling a custom plenum.

I've heard bad things about the custom plenum. As far as I know, everyone on the vette forums that has tried one is no longer using it.

If I remember correctly, I think problem with the custom box is air distribution which causes some cylinders to burn hotter than others.

That's the main reason Im trying to figure out how to make Holley's original design work. Theoritically you shouldnt change flow pattern if you only cut down the runner tower height, but since Im not an engineer, Im not 100% sure.

You may also be able to cut the Holley fuel rail down 1/2" in the front and retap for the fittings to clear the TB linkage. That may save $150 on the TB spacer. My HSR should be here in the next week and I can look at it some more.

 

if you could get some one to mill the intake where the injectors fit in you can just drill and tap new mounting holes for the fuel rails.

if I remember right the injector tips stay inside the holes. I think you can mill around 1/4-3/8 inch before the injector tip would stick out in the runner. once this is done the top of the intake could be milled.

angle mill the throttle body sightly and you should have room to spare

 

Main concern I have is how changing the runner tower height will affect air flow to each cylinder since the HSR uses individual runners unlike the single plane manifolds. [/B][/QUOTE]


but, all the runners are the same as each other. it will most likely lower torque and raise rpm band but, with only 1/4 -3/8 being taken off I would be surprised if the dyno would show anything more than a few rpm change and 5-10 ftlbs max

 

David, just out of curiosity how long do you plan on running this deal? It's a great deal and I"d love to jump on it right away, but I am in need of suspension, then gonna get the vortecs and get those built to my specs. So how long do you plan on having this up?

 

The sale is good until the last day of this month. There is a slight change to the fuel rails though. Check the original post for the correct part #'s in just a few minutes.

 

Guys, the rail kit is different. The Vortec style will have it's own rail kit. Part #'s are 534-192(w/o AFPR) and 534-193(w/ AFPR). For the people that already placed their orders, yours will be corrected. I updated my original post.

 

So the polished Vortec HSR isn't part of the special, right? (Not that I can afford $600, or even something less than that, just wondering).

 

Nope, just the 7542 non polished.

 

Okey dokey.

 

if anybody wants to sell their sbc stealth ram so they can buy a vortec one, contact me. I am interested in a non vortec stealth ram. ml258@yahoo.com

 

If anybody is interested in selling their Super Ram, send me a pm, because I'm interested.

 

Why all the whining over the height of the HSR? Don't you guys see an opportunity to justify a new Ram Air or Cowl Induction hood when you see one?

 

any word on the stealth ram yet? anyone gotten one?

 

you can gain close to a quarter of an inch by milling the ribs off. The throttle cable bracket problem can be solved with a lokar mount.

 

A handful of VHSR's came in and we filled the orders as they were taken in order of date. Should hope to see some more soon. No ET though.

 

I got mine like a week ago

 

SUPER!! please let us know when u get it on!!!

i think your about to bring the beast to life Dr. Kicknazznstyle.