Guys, I know that Doug Flynn has been known to post here, but since it's not too often, I'm going to forward this message that I nabbed off of the chevytalk.com website. For those of you that don't know, Doug is a Holley employee that is directly involved with the development of the stealth ram. Anyway, this is a quote from the thread:
Here's the thread: http://www.chevytalk.org/forums/Foru...ML/000523.html

So far this guy seems to be bending over backwards to make this intake system as good as it can be. Although I punked out and went with an accel base and SLP runners, once I get the car running right, I'm definately considering upgrading to the stealth ram when I get new heads. So far, doug's efforts and personalized information/help has impressed me enough to swing me closer to getting one.

 

I just wonder why they didn't think of hood clearance BEFORE they put it into production. How long has the world waited for an answer to high priced chevy EFI manifolds? Why box yourself out of the market for guys that run stock hoods (including us and the vettes)
Hopefully we only need at worst an angled spacer to make it work. If not a custom box upper would be the best bet. Hopefully if necessary holley just comes out w/ another box plenum for us and vettes if clearance warrants. How hard could that be to push through with an ECO?

 

I really dont understand how an angled spacer will work. Sure, it will give the TB a slight angle down, but how will it be attached? The bolts still have to go into the plenum straight. Unless the current bolt holes are filled and new ones are drilled and tapped at an angle, I dont see how an angled spacer would work, or am I missing something here?

 

I don't understand why they couldn't add an EGR valve and have an intake that satifies everyone. It looks like there's enough room in the middle where the Holley logo is

 

I believe that in development holley designed this as a custom efi intake rather then a TPI upgrade, hence the possible hood clearance issues and lack of egr. If there is really a big problem, they really missed out on a market because at the price they're offering it at I bet anyone planning to buy a super or miniram would get the stealth instead, if it fit like stock.

Doug has hinted that he may work to modifiy the intake to fit our cars if hood clearnace is a problem, no mention of egr.

On the egr point, would it be possible to rig an external egr like the vette and introduce the exhaust ahead of the throttle body.

 

Holley's stealth ram base is / was an already existing part. The only diff. that i know of is that it now comes w/ the injector bungs drilled and mounts for the fuel rails. That is why it doens't have EGR as it is now. Would it be a good idea to make an EGR version, sure, but i'm willing to bet it'd bring a bigger cost with it as they'd have to pass the R&D of the EGR manifold off to the customer. Also, if they're going to make an EGR version, they might as well get an EO number on it too then so it's truly legal. But that's even more money passed off to the customer.

As for the hood clearance issue, it was obviously not designed specifically as a TPI replacement since it doesn't fit unde rthe hood of the flagship of TPI , the vette. This just shows tremendous short-sightedness though, both by development and marketing. Somebody should have realized how simple it would have been to keep the plenum height in check to get it to fit under stock hoods and how much more saleable it would be that way.

 

Just to refresh the conversation, my take on what Doug said is that they'll be producing a camaro-specific model. This is good. Hopefully in addition to fitment, they'll address some other issues like mating to the factory fuel lines, large distributer clearance and that type of stuff.

 

how about us guys with STB's? can they make that damn fit with them?

 

I can deal with needing an aftermarket hood to obtain clearance since I want to upgrade anyways but I know thats not the case for everyone. For ME I wouldnt mind shelling out alittle extra $ if they took the time to make it smog certified since here in NJ they are strict about it and the aftermarket truely only caters to those who want a new EFI intake and dont care about emissions. What we need is a manufacturer to take this into consideration and give us model and application specific EFI owners an alternative to high flow pieces that are still less than desireable by what I see posted on here time and time again...

 

I went the Slp runner route as well. As soon as I get a decent built motor in there, I am considering the Stealth setup. I would like to wait and see what bugs they work out. The thing that bothers me is they will most likely jack the price up if we keep showing interest.

 

Im just Glad to See a Major Aftermarket Vendor working with Us.

Hopefully they won't jack up the price once the popularity of this thing explodes.

 

This is from a guy that works for holley
--------------------------------------------------------------------------------
Here's the chassis dyno results!
Car is an automatic 1992 5.7L Camaro. Car is bone stock except cat back.

We added the stealthram and a Holley billet 58mm throttle body. That was the only changes. I don't think the throttle body makes much of a differenece at this power level.

This data is for 3rd gear RWHP on a dynojet.

RPM Stock HP Stealthram HP Diff
3400 190 175 -15
3600 200 188 -12
3800 209 198 -11
4000 210 204 -6
4200 212 210 -2
4400 213 223 +10
4600 214 234 +20
4800 210 240 +30
5000 198 239 +41
5100 184 238 +54
5200 174 237 +63

I was honestly suprised at how much more HP it made.

If you have a bone stock car and like to shift at 4000 and enjoy torque at 1300 RPM, DON'T get this intake. If you like your HP at 4000 and up, and don't mind some loss below, then .

This was with a STOCK car, add more cam, headers, then you can really make some power.

As for the install, it fit under the hood with NO mods to the intake for clearance. We just removed the hood insulation. It is close, but there is still enough room for engine movement on this car.

For mods, basically you have to cut the stock fuel lines and connect up with -6 lines, lose EGR, Stock coil location is fine, you need some vacuum fittings and vacuum line, basic hardware/autoparts store stuff. The stock air cleaner ducting even lined up. This was a speed density car. I think a mass air would be fine too, but want to see.

I'm going to get the new manifolds machined for the late (center 4 holes) bolt pattern also in the future. These aren't. We used some angled spacers that weiand sells for this car.

 

Was there any tuning done before / after the intake swap. If not then it's not a remotely fair comparison. I bet you could make up most of that low end loss with the right tune on it. Likewise i bet those top end numbers would benfit too.

Couldn't agree more. Of course if you drive like that why would you even consider modifying your car at all?

 

Thats all that he posted If you have more questions go to www.chevytalk.org on the EFI section the guys name is Doug.

 

exactly the differnce between a LTR and a SR intake.

 

That mod alone seriously wakes the L98 way the hell up. Looks like a great way to spend $450...

You can't use THAT much of the low end power anyway because of traction, I would think the increase up top is well worth the slight decrease down low. Currently it's spin your tires with the mountain of torque, and then about the time you get moving you run out of power. Doesn't sound ideal to me...

I've been thinking about getting another thirdgen, a 91-92 L98 car and building it up, and this intake is really calling my name (wish it fit Vortec heads, I'd re-convert to EFI on my 87Z now...)

 

Seriously. And with a nice torque converter like a vigilante, the torque loss is a wash because you stall past most of it. And 3.23 gears are perfect with a converter to do the work for you.
I just swapped the vigilante into mine and it's the best mod yet for sure. It flashes up to 3k (remember the vert is heavy) but in just driving it's very reasonable and 'tight'. And once you're cruising the TCC is locked anyway so highway is still the same. The difference in driveability and available power is incredible. Now i just need to get to the track.

 

I might do this to my other ride whenever I get it. I could deal with a 63HP increase at 5200RPM. Makes the power much more useable IMO. Throw a converter on it and I should blow right by ya Ed...

 

Well, that covers a Camaro hood, but what about a Pontiac hood??????? Me thinks it is a no-go from the looks of it, but maybe (hopefully) not.

It looks like it performs quite well though.

 

Well, after taking some measurements on my TA I am gonna have to say theres no way it'll fit. Thats if Holley's figure of 10" is correct. If its 9.5", it would clear if you cut the support on the underside of the hood. I measured an extra TPI intake I have, it was 8 1/8" at the front of the TB, and 8 1/4" at the front of the plenum. I'm not sure how they do the height, if its from the block those numbers are probably 1/8" too short. I measured 15/16" clear at the front of the TB, and 1 1/16" at the rear of the TB. The support is about 3/4" lower than the hoodline, approximately. Doesnt leave much space, especially considering its gonna rock some.

I suspect, as is, its not gonna fit.

What we need is someone with a Camaro and TPI to measure the clearance.

 

I thought it was said that this intake would not work on newer heads????? Only 87 and lower????? How then is this 92 Camaro stock???? Or am I wrong here????

 

Slow,

Doug F (the guy from holley) has installed it on a stock 92 TPI l98, using some adapters from weiand for the middle bolt holes.

 

where do you get these adapters and how much? part numbers? dod you have to grind the Stealth Ram at all?

 

You "wallow" out the center holes on the intake a bit so the bolts can go in at the right angle. The "adapters" are just angled washers basically that sit under the bolt heads so the bolt pushes down evenly on the intake... No biggie at all.

What kind of effect do you guys think this intake would have on a mild 305? My old 86 IROC has a 305 TPI with a mild cam (204/214), TES headers, catco cat, flowmaster cat-back, chip, shimmed FPR, etc. Think it would yield any benefit or is it too much intake? Since I would think this 305 would outpower a stock L98, seems to me it would show a likewise gain then. Too much low end loss for the 305, etc? Any thoughts?

 

Could you please post the Part number for the adapters for the angled bolts in the center.
Thanks,
J

 

I ordered the stealth ram today I should have the manifold next week and the fuel rails the week after.Im also getting ALL the info on what they had to do to install it in the camaro(fittings,hoses,vac lines,etc.) .So I guess Im going to be one of the firebird guinea pigs. I really dont think its going to fit but we will see.

 

Could someone post exactly whats needed to do the conversion.....adapters, fittings, fuel lines, etc....... Part numbers would be a great help!!!!

 

I should get that info next week.

 

I read a post at ChevyTalk that the fuel pressure doesn't put out 43 psi. It only puts out 35 psi. Anyone know if this is true?
Thanks
J

 

Dunno, but i'd think anyone running this would be using an AFPR anyway.

 

Originally, I though Holley was selling it with an AFPR. Doesn't even make sense why they sell it with a non-adjustable FPR.
Maybe this going to change later on?
Thanks,
J

 

True. Especially when the make such devices. The only reason i can figure is maybe they figure a lot of the people may want to run a different AFPR, or might already have a nice fuel system on something else and just want to keep their line mounted regulator.

 

According to Doug, they're selling it with a non adjustable FPR for simplicity, so that it can be a "bolt on" type of system that doesn't need any tuning.

 

I hope I can bolt mine on without any tuning...ha ha ha ha ha. I would be happy if it at least put out 43 psi. Guess I will have to wait and see.
Thanks,
J

 

Pic from chevytalk. Looks better than my mini.

 

I guess you didn't see the thread I started with the pic.

 

From Doug F
--------------------------------------------------------------------------------
Here's a list of parts we used.
-Used a 85 Camaro Carbureted upper radiator hose (Dayco 71028) (trimmed the ends back)
- Use a std. small block Chevy waterneck (Mr. Gasket PN 2661)
-Two 1/4" x 1/8"NPT straight barb fittings (rear of intake, MAP sensor and other items, I run only one line to MAP)
-One 3/8" x 3/8" NPT straight barb fitting (rear of intake other vacuum items)
-One 3/8" x 3/8" NPT 90 deg. barb (goes under plenum, used for brake booster)
- 2 feet 1/4" vacuum hose
- 2 feet 3/8" vacuum hose
- (1) 5/16" compression fitting to -6 male AN
- (1) 3/8" compression fitting to -6 male AN
- (2) 3-1/2 foot -6 line with female hose ends. Goes from inlet and outlet to fuel stock fuel lines which are cut from underneath car, the two compression fittings are installed on the stock fuel line.
- (3) 1/4" vacuum plugs for EGR solenoid and throttle body
- (1) large clamp

All the vacuum ports are machined into the plenum. The current lowers don't have the late style center bolts machined, but I am getting future ones machined correctly to fit both. Can't say when for sure. Used the stock air inlet.

You lose EGR and we didn't hook the coolant to the throttle body. Need to use the small cap GM HEI. Coil mounted with stock bracket in stock location.

Didn't have to modify any wiring.

 

Hey guys, I just recieved my intake today and I'm going to go put it on right now. I should have an answer on the firbird fitment question within a couple hours hopefully.

 

Well, I lost the throttle body bolts so I'm not gonna be dont till tomorrow (in flint we have a 24 hour home depot, but nope not in cleveland). That thing IS tall, it's going to be close.

 

Well, It fits.

It's a tight fit, but it's doable with a stock hood. I just dented in the support on the underside of the hood where it was hitting, and made enough clearance that way. Now, At the moment I have my tranny supported by a jack, not the crossmember, so I might need a little more clearanace, but even with the support dented in as it is now, there's still another 3/8" or so between it and the hood skin, so If i need more I'll just notch out that section of the support and It will have enough room.


The contact points were, as predicted, the two side bolt bulges on the top of the throttle body.

This is using a stock tpi throttle body, btw, in an 82 trans am with the normal hood (no turbo bulge or anything), stock motor mounts.

 

Thats great to hear I thought for sure I would have to cut the hood suport out across the middle.

 

3.8" !!!!!! Are you sure you don't mean 3/8" .... I mean if it has 3.8" you could still have a decent sized STB on there and I can't see that happening.

 

whoops, yea 3/8" changed it above.

Since you mentioned it, for STB I'm going to fab something that doesn't go directly over the plenum, something like a capital A with the point at the firewall and the legs at the strut towers.

 

Cool. Kinda figured that is what it was. Hmmm.... I wonder what kind of room could be created with a little 'clearancing' of the TB bolt bosses...... Maybe the BMR STB could be made to work since it is fairly thin where it goes across the TB area.... Maybe shim it up at the STs or move it backward or forward slightly.....

 

Stock motor mounts aye? So they have never been replaced? I'll bet if you put new motor mounts in you'll come up with some problems. Poly motor mounts, or new motor mounts in general have been known for raising the engine.

M2C

 

Yep stock mounts. I cant be sure theyre original but they probably are. They're in decent shape tho. The rubber is still all intact. I know it might be an issue, thats why i mentioned it. I was goign to put in poly mounts but for the money and trouble of replacing them, i decided to just wait unti lthe engine is out agian.

 

Is it jacked up above where the tranny crossmember would hold it? Jacking up the tranny does tilt the engine forward in the engine bay. You really need to check again with the tranny properly mounted to the crossmember. I would not be at all surprised if you ran into problems with it then.

 

I've got the tranny installed properly now with the cross member. Where it was jacked up was at the proper level anyway. I think it still will fit without any external mods, but I've pulled off the stealth ram to put tpi back on while i wait for the fuel rails. Once I get the fuel rails I'll install it for good and then i'll have a definate answer.