Holley Sheet Metal Intake fitment
Thread Starter
Race Director
Joined: Jun 2009
Posts: 12,331
Likes: 139
Its not "sheet metal" its what it goes by, now lets not get into argument about the semantics of this, I just need some that one can post an answer to the OP. If you can great if you can't great too.
Thank You
Race Director
Joined: Dec 2004
Posts: 13,760
Likes: 75
From: Haymarket VA
I've been around for a little while and I've never heard that called a sheet metal intake - even once. It is a modular setup from Holley that has several top piece configurations that include front mounted TB to top mounted single 4 BBL and duel BBL. There have been reports of some machining issues in the injector bosses that need to be addressed.
To put that in/one a C5 you will have to cut your cowl up back to the windshield and most likely loose your wipers in the process. It's going to take something like a 5 inch hood to get over top of this. IIRC it is about 13 inches tall measured from the church wall. Performance will suffer badly below about 5k RPM providing the engine is properly setup for an intake like this.
For the record and so as to remove any confusion, this is a sheet metal intake from John Marcella.
To put that in/one a C5 you will have to cut your cowl up back to the windshield and most likely loose your wipers in the process. It's going to take something like a 5 inch hood to get over top of this. IIRC it is about 13 inches tall measured from the church wall. Performance will suffer badly below about 5k RPM providing the engine is properly setup for an intake like this.
For the record and so as to remove any confusion, this is a sheet metal intake from John Marcella.
Thread Starter
Race Director
Joined: Jun 2009
Posts: 12,331
Likes: 139
I've been around for a little while and I've never heard that called a sheet metal intake - even once. It is a modular setup from Holley that has several top piece configurations that include front mounted TB to top mounted single 4 BBL and duel BBL. There have been reports of some machining issues in the injector bosses that need to be addressed.
To put that in/one a C5 you will have to cut your cowl up back to the windshield and most likely loose your wipers in the process. It's going to take something like a 5 inch hood to get over top of this. IIRC it is about 13 inches tall measured from the church wall. Performance will suffer badly below about 5k RPM providing the engine is properly setup for an intake like this.
For the record and so as to remove any confusion, this is a sheet metal intake from John Marcella.
To put that in/one a C5 you will have to cut your cowl up back to the windshield and most likely loose your wipers in the process. It's going to take something like a 5 inch hood to get over top of this. IIRC it is about 13 inches tall measured from the church wall. Performance will suffer badly below about 5k RPM providing the engine is properly setup for an intake like this.
For the record and so as to remove any confusion, this is a sheet metal intake from John Marcella.
Pro
Joined: Jun 2008
Posts: 575
Likes: 10
From: Oskaloosa Iowa
Is this the intake your talking about? 
Side shot
I just received mine, its the 300-116 LS3/L92 ports, WKMCD is close to his diagnosis for this intake, you have to notch the cowl 2" min back, TBD on losing the passenger side wiper, (its going to be close) At its highest point a 4.5" cowl hood will clear the front of it, i'm ordering a 6" cowl then I'll cut it down & get it to fit & look right
Obviously the intake is just sitting on my engine, this was the 1st mock up shot before the hacking began, Oh btw this intake works fine with a 366ci, 6750 rpms making 1138rwhp, E85, turbo (No, not my car)
Side shot
I just received mine, its the 300-116 LS3/L92 ports, WKMCD is close to his diagnosis for this intake, you have to notch the cowl 2" min back, TBD on losing the passenger side wiper, (its going to be close) At its highest point a 4.5" cowl hood will clear the front of it, i'm ordering a 6" cowl then I'll cut it down & get it to fit & look right
Obviously the intake is just sitting on my engine, this was the 1st mock up shot before the hacking began, Oh btw this intake works fine with a 366ci, 6750 rpms making 1138rwhp, E85, turbo
(No, not my car)
Last edited by Ksths2; Nov 7, 2012 at 04:14 PM.
Race Director
Joined: Dec 2004
Posts: 13,760
Likes: 75
From: Haymarket VA
Is this the intake your talking about?
Side shot
I just received mine, its the 300-116 LS3/L92 ports, WKMCD is close to his diagnosis for this intake, you have to notch the cowl 2" min back, TBD on losing the passenger side wiper, (its going to be close) At its highest point a 4.5" cowl hood will clear the front of it, i'm ordering a 6" cowl then I'll cut it down & get it to fit & look right
Obviously the intake is just sitting on my engine, this was the 1st mock up shot before the hacking began, Oh btw this intake works fine with a 366ci, 6750 rpms making 1138rwhp, E85, turbo (No, not my car)
Side shot
I just received mine, its the 300-116 LS3/L92 ports, WKMCD is close to his diagnosis for this intake, you have to notch the cowl 2" min back, TBD on losing the passenger side wiper, (its going to be close) At its highest point a 4.5" cowl hood will clear the front of it, i'm ordering a 6" cowl then I'll cut it down & get it to fit & look right
Obviously the intake is just sitting on my engine, this was the 1st mock up shot before the hacking began, Oh btw this intake works fine with a 366ci, 6750 rpms making 1138rwhp, E85, turbo
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Team Owner
Joined: Jan 2007
Posts: 29,062
Likes: 1,838
From: cookeville tennessee
Pro
Joined: Jun 2008
Posts: 575
Likes: 10
From: Oskaloosa Iowa
Hey WKMCD, I've read alot of about the casting & maching issues as well but i'm still not 100% I know the problem. When you say inj bosses for alignment, aligning to what? Centered in the port? or aligning to the fuel rail?
Thanks!
Thanks!
Pro
Joined: Jun 2008
Posts: 575
Likes: 10
From: Oskaloosa Iowa
As promised here are the pics of the "MINIMUM" of how much is needed to remove out of the cowl & the plastic wiper cover on a C5 Vette.
as you can see I might need to remove a bit more depending on what fitting I'll need for the brake vacuum & MAP sensor - but it does look like its possible to run both of the wipers
Also, the fuel rails are so big on this that I had to remove alot more than first expect to make room for them & the fittings coming out of the back of them as well
And last I couldn't resist a shot of it 100% fit/installed
4 hrs later my engine bay looked like this...... time to build the new bullet
as you can see I might need to remove a bit more depending on what fitting I'll need for the brake vacuum & MAP sensor - but it does look like its possible to run both of the wipers
Also, the fuel rails are so big on this that I had to remove alot more than first expect to make room for them & the fittings coming out of the back of them as well
And last I couldn't resist a shot of it 100% fit/installed
4 hrs later my engine bay looked like this...... time to build the new bullet
Race Director
Joined: Sep 2005
Posts: 11,060
Likes: 291
From: Pasco WA
No offense, but is it really neccessary to do all that work to make the Holley fit? Have you ever tried a FAST? Lot of cast metal there, and if you're doing it for anything but looks; then I would guess the performance of a motor stock, stroked, or FI would be inferior to the Wilson manifold. Fits under the stock hood, too. OTOH, it'd sure
look cool if you had the Holley polished. Seems that they built it for hot rod projects, because it'd never work in an F-bod.
look cool if you had the Holley polished. Seems that they built it for hot rod projects, because it'd never work in an F-bod.
has anyone done dyno test with these compared to the FAST intakes?
Pro
Joined: Jun 2008
Posts: 575
Likes: 10
From: Oskaloosa Iowa
Yes if you want this intake to fit you'll need to do this hacking, I'm just documenting all the crap that has to be done if anyone is interested
Yes I've had the FAST 92mm intake for the past 4 years and worked great on the LS1 w/ a 175 shot from a Harris Speed works plate
My car isn't exactly stock anymore so I figure might as well go big, it used to be a 6spd car now all RPM transmission drivetrain, working on the new setup as E85, YSI, AES 390ci forced induction iron block, plus I've always like the looks of cowl hoods & figured I might as well do it all at the sametime with it (Yes I'm hated by some Vette owners)
Not 100% sure on true numbers but my buddy is the only other guy w/ a C5 that has this intake on and he lost a bit of midrange power but gained 56rwhp overall hp at 6750rpms.
Yes I've had the FAST 92mm intake for the past 4 years and worked great on the LS1 w/ a 175 shot from a Harris Speed works plate
My car isn't exactly stock anymore so I figure might as well go big, it used to be a 6spd car now all RPM transmission drivetrain, working on the new setup as E85, YSI, AES 390ci forced induction iron block, plus I've always like the looks of cowl hoods & figured I might as well do it all at the sametime with it
(Yes I'm hated by some Vette owners)Not 100% sure on true numbers but my buddy is the only other guy w/ a C5 that has this intake on and he lost a bit of midrange power but gained 56rwhp overall hp at 6750rpms.
Drifting
Joined: Jan 2010
Posts: 1,447
Likes: 1
From: Katy TX
As promised here are the pics of the "MINIMUM" of how much is needed to remove out of the cowl & the plastic wiper cover on a C5 Vette.
as you can see I might need to remove a bit more depending on what fitting I'll need for the brake vacuum & MAP sensor - but it does look like its possible to run both of the wipers
Also, the fuel rails are so big on this that I had to remove alot more than first expect to make room for them & the fittings coming out of the back of them as well
And last I couldn't resist a shot of it 100% fit/installed
4 hrs later my engine bay looked like this...... time to build the new bullet
as you can see I might need to remove a bit more depending on what fitting I'll need for the brake vacuum & MAP sensor - but it does look like its possible to run both of the wipers
Also, the fuel rails are so big on this that I had to remove alot more than first expect to make room for them & the fittings coming out of the back of them as well
And last I couldn't resist a shot of it 100% fit/installed
4 hrs later my engine bay looked like this...... time to build the new bullet
Race Director
Joined: Sep 2005
Posts: 11,060
Likes: 291
From: Pasco WA
Yes if you want this intake to fit you'll need to do this hacking, I'm just documenting all the crap that has to be done if anyone is interested
Yes I've had the FAST 92mm intake for the past 4 years and worked great on the LS1 w/ a 175 shot from a Harris Speed works plate
My car isn't exactly stock anymore so I figure might as well go big, it used to be a 6spd car now all RPM transmission drivetrain, working on the new setup as E85, YSI, AES 390ci forced induction iron block, plus I've always like the looks of cowl hoods & figured I might as well do it all at the sametime with it (Yes I'm hated by some Vette owners)
Not 100% sure on true numbers but my buddy is the only other guy w/ a C5 that has this intake on and he lost a bit of midrange power but gained 56rwhp overall hp at 6750rpms.
Yes I've had the FAST 92mm intake for the past 4 years and worked great on the LS1 w/ a 175 shot from a Harris Speed works plate
My car isn't exactly stock anymore so I figure might as well go big, it used to be a 6spd car now all RPM transmission drivetrain, working on the new setup as E85, YSI, AES 390ci forced induction iron block, plus I've always like the looks of cowl hoods & figured I might as well do it all at the sametime with it
(Yes I'm hated by some Vette owners)Not 100% sure on true numbers but my buddy is the only other guy w/ a C5 that has this intake on and he lost a bit of midrange power but gained 56rwhp overall hp at 6750rpms.
OK, it looks like you got youself a race car, there.
I still think you should polish it, though. 
Pro
Joined: Jun 2008
Posts: 575
Likes: 10
From: Oskaloosa Iowa
Yes I pulled the engine from the top & the rest of the drivetrain was in place (bellhousing connected to the torque tube conne.... you get the point lol)
I did lower the cradle about 3" max with a floor jack, i was amazed how easy it came out. I just did a search on DIY c5 engine removal and found a step by step from cajundude.
Not sure on the power for the Jr & elbow, I was planning on going this route until I lost my mind and bought the Holley
I did lower the cradle about 3" max with a floor jack, i was amazed how easy it came out. I just did a search on DIY c5 engine removal and found a step by step from cajundude.
Not sure on the power for the Jr & elbow, I was planning on going this route until I lost my mind and bought the Holley