It's coming close to crate engine time. I'm only worried about one thing at this point. I'm running an aluminum high rise manifold on my 350. I had to get a BB hood and a drop base air cleaner to get it to fit. It's an old Weiand manifold, so it's not a stealth or anything, but it's between an Edelbrock performer and performer RPM as far as height is concerned.

How much taller is a 454 HO with the aluminum manifold that comes on it going to be compared to my 350 now? I just put this hood on, I don't want to have to go and get an L88 hood, nor do I care for the look of the L88 hood.

Thanks

 

Steve:
Isn't the hood that you currently have on an L88 style hood? As far as clearance goes, I'm not sure what type of intake comes with the HO 454s. I believe I remember hearing that if you go with an intake manifold any higher than a Torker II (with the hood that you currently have) it will not fit. Pretty much the only thing you can do is try it. If worse came to worse and you didn't want to change hoods (again) you could go with a Torker II intake and a drop-base air cleaner...that setup would probably give you enough room.

BTW Steve: How much power is the HO 454 going to be pushing :) I bet it will be a blast with that M21 :cool:


[Modified by bence13_33, 2:55 PM 10/28/2001]

 

Hey bence. My hood is actually a BB/LT-1 style hood, that's about 2 inches taller than a stock BB hood. Its aftermarket. The L88 hood is a different shape.

The 454 HO is listed at 425 ponies, but I may be able to get a little more out of it with some level of creativity.

Here's a link to the engine. Scoggin-Dickey is having a free-shipping deal, so I'm going to get it through them.
http://www.sdpc2000.com/cart.asp?act...id=120&pid=119

--
Steve

 

That looks like a nice engine! Free shipping, huh?? :) I have wondered why more dont go that way (intstead of the more expensive 502/502). You can buy nice "454" emblems for your hood, but I dont think they make "502" embems! A few bolt-ons and you should be pushing 500 hp. i guess it runs on regular 87 octane also. MJ

 

Steve,

I think the L88 intake is at least 1.5 inches taller than the 390hp or tri-power version. I don't believe ANY big block manifold other than the factory low rise versions previously mentioned will fit under the big block hood. Like you, I much prefer the look of the BB/LT1 hood and did more than a little searching and checking. The only reasonably good manifold I found that will work is the '71 LS6.

Chuck

 

After all is said and done, my car will have 427 emblems. If anyone asks me, my car has a 427, that's my story and I'm sticking to it :D.

 

Is that manifold an oval port or square port setup? Also, my BB hood is aftermarket and sits about 2 inches higher than a factory BB hood, will that make much of a difference? I was hoping someone on here has the 454 HO and could tell me about it.

--
Steve

 

Steve,

Mine is a square port; but, I believe that the 502HO uses the same basic casting as the L88. The only real difference is that they don't mill out the plenum divider as they did for the L88 and ZL1's. The height is the same. I though you might find these following pages from the Chevy Performance Book useful.




Chuck

 

Hmmm..It shows P/N 3933163 as being an LS-6 intake that is also used on the 454 and 502 HO engines and unlike all of the other manifolds, doesn't have the "not Corvette friendly" disclaimer at the end of the part description. I wonder if my crate motor will actually come with the right intake, I need to have the part number on the manifold crossed.

--
Steve

 

Steve,

I know it doesn't give the height disclaimer; but, I will bet a double cheeseburger that it should have. This is the same manifold as my L88 highrise w/o the center divider milled away. Unfortunately, it will not fit the stock big block hood. I wish they continued to offer the 71 lowrise LS6, but they don't.

Chuck

 

w00t !

I agree....with a few *choice* parts (bolt-on at that) and that
454 will be screaming over the 502's !

hehe......chuckle chuckle.....only a 427 .....gawd....you make that sound small in this discussion of extreme-cubic inches...

:cheers: :cheers: :cheers: :cheers: :cheers: :cheers: :cheers: :cheers:

-J

 

can you get low profile engine mounts... might give you just the room you need, signed bubba

not sure how to help

ZD

 

where do i get that parts book??? Thats better than summit for details but not sure on price

ZD :cheers:

 

I hadn't thought of that, but I think that may tilt the output shaft of the tranny a little too high.

Again..I don't have a stock bb hood, so this may fit. I have a high rise manifold running on my small block right now.

--
Steve

 

Steve,

The small block LT-1 high rise is equal to a big block with lowrise regarding hood clearance. Your red hood looks just like my LT-1/BB hood. I think you will need to get a good used LS6 lowrise ~$400, or a factory 68-69 tri-power like GDaina's. Even the Holley Pro-jection systems are too high for the BB hood.

I also looked into lowering the engine mount. Problems in that direction too. Not much room for the steering rod, oil pan clearance gets pretty slim also. A solution that might work would be using a 73-79 hood, but you just bought your red hood. If I remember correctly, you have invested more than a little time getting it to fit properly.

I've got a tri-power setup that I may put on someday, but I will probably get a LS6 lowrise and use it instead. I really like the Holley 4 barrel I now have. I would miss the instantaneous throttle response it gives me. I will enjoy the configuration I have now for a while (L88 hood and side pipes) but will change to my smaller BB hood and pipes underneath eventually. I am hooked (more like addicted) to the incredible power the L88 has, but I also prefer a more discreet looking and sounding Vette.

Chuck

 

Steve,

I just re-read your post saying that your LT-1 hood is actually taller than the factory LT-1. It didn't look like it, a compliment to the designer. If you have 2.5" more than your small block hood you are probably in good shape. If you're even close to 2 inches, I'm sure you can make it work. I may give you a call to find another one for me!

Chuck

 

Here's a couple of pictures that show how much taller it is. I took them at this angle so it emphasizes the point. It's not quite as tall as an L88, but it's taller than a LT-1/BB hood.

I bought it from another forum member, so I honesly don't know where it was originally purchased. I can find out if you're interested.

 

WIELAND dual plane alum high rise , with 780 holley & stock open element air filter fit under my stock 66 big block hood & no contact............worked for me........... :)

 

Interesting. How is the hood clearance in a 66 as opposed to a 69? Do you have a part number for this intake? I assume you mean it's a Weiand.

--
Steve

 

will send more detailed info tomorow .......my spelin is bad.