What fits under a 75 L-48 stock hood???
Thread Starter
Racer
Joined: Nov 2008
Posts: 293
Likes: 1
From: Eaton Ohio
What fits under a 75 L-48 stock hood???
I know questions similar to this have been asked again and again, I know I've been searching the forum for days! 
It seems each year is different as well as the standard hood offered for that year, that is why I am asking specifically for a 1975 L-48 with stock hood.
I would be interested to see what head/intake/carb/cleaner combos you fellow 75 owners have that work with the stock hood...
Ideally I would like to know about what fits with AFR 195 heads and the various edelbrock intakes (performer, airgap, RPM airgap...) but I am asking for all combos as a reference point to all those in the future who search on this topic so that they can get help as well. I look forward to you input, Thanks!!!
PS: I'm lightly considering getting a stinger hood, does anyone know how much more room that will get me?
It seems each year is different as well as the standard hood offered for that year, that is why I am asking specifically for a 1975 L-48 with stock hood.I would be interested to see what head/intake/carb/cleaner combos you fellow 75 owners have that work with the stock hood...
Ideally I would like to know about what fits with AFR 195 heads and the various edelbrock intakes (performer, airgap, RPM airgap...) but I am asking for all combos as a reference point to all those in the future who search on this topic so that they can get help as well. I look forward to you input, Thanks!!!
PS: I'm lightly considering getting a stinger hood, does anyone know how much more room that will get me?
Safety Car
Joined: Jan 2009
Posts: 3,736
Likes: 56
From: anchorage ak
Right now I am running an wieand action plus, On one of the other forums there's a guy has photos of an rpm air gap fitting under the stock hood with a drop base air cleaner, which I will be verify in the next week or so, as I plan on doing all the measurements, so I can respond with my own knowledge then. In the procharger catalog there's a guy with a Corvette that has a procharger that's intercooled all under a stock hood. I am at the conclusion that maybe I should just buy a l82 high rise.
Race Director
Joined: Jun 2000
Posts: 10,046
Likes: 675
From: FL
Edelbrock 7104 Performer RPM Q-Jet (same height as all RPM and RPM Airgaps)
Quadrajet
Edelbrock RPM heads (heads have no effect on height)
Moroso Low Profile Racing Aircleaner with drop base and 3" filter
3/4" clearance with stock 1975 hood.
Quadrajet
Edelbrock RPM heads (heads have no effect on height)
Moroso Low Profile Racing Aircleaner with drop base and 3" filter
3/4" clearance with stock 1975 hood.
Racer
Joined: Oct 2010
Posts: 474
Likes: 0
From: Bishop CA
I know questions similar to this have been asked again and again, I know I've been searching the forum for days! It seems each year is different as well as the standard hood offered for that year, that is why I am asking specifically for a 1975 L-48 with stock hood.
I would be interested to see what head/intake/carb/cleaner combos you fellow 75 owners have that work with the stock hood...
Ideally I would like to know about what fits with AFR 195 heads and the various edelbrock intakes (performer, airgap, RPM airgap...) but I am asking for all combos as a reference point to all those in the future who search on this topic so that they can get help as well. I look forward to you input, Thanks!!!
PS: I'm lightly considering getting a stinger hood, does anyone know how much more room that will get me?
It seems each year is different as well as the standard hood offered for that year, that is why I am asking specifically for a 1975 L-48 with stock hood.I would be interested to see what head/intake/carb/cleaner combos you fellow 75 owners have that work with the stock hood...
Ideally I would like to know about what fits with AFR 195 heads and the various edelbrock intakes (performer, airgap, RPM airgap...) but I am asking for all combos as a reference point to all those in the future who search on this topic so that they can get help as well. I look forward to you input, Thanks!!!
PS: I'm lightly considering getting a stinger hood, does anyone know how much more room that will get me?
Thread Starter
Racer
Joined: Nov 2008
Posts: 293
Likes: 1
From: Eaton Ohio
Thanks for all of the replys! I wasn't entirely sure about heads and height difference...glad that is cleared up, 
I have read on other forums that there is a height difference between the Edelbrock Performer, and the performer Airgap... does anyone have the measurements?
::Edit:: double checked edelbrocks website... RPM and RPM air gap are the same height, but RPM airgab is a square bore which would require a carb adapter..which adds height... wonder if I can find one that is >= 3/4 inch... and the Performer Airgap (NOT RPM) is a little shorter and accepts the spread bore.... decisions decisions.....
Also, what is you opinion on the weiland intakes... obviously some of you may be bias as that is what you have set up, but I'm wondering what convinced you to choose that set up? Most all I read is eddy this eddy that, I'm all ears
The only thing i'm set on right now is the AFR heads and my Q-jet..
I'm ditching the stock snorkel intake (light oil and vacume bag storage) I'm considering doing a reverse cold air set up as some others have done around here.. using the airpressure from the windshield to get cold air from the back of the hood...but thats a later project.. body is still apart from the frame and engine on a stand waiting for attention
I have read on other forums that there is a height difference between the Edelbrock Performer, and the performer Airgap... does anyone have the measurements?
::Edit:: double checked edelbrocks website... RPM and RPM air gap are the same height, but RPM airgab is a square bore which would require a carb adapter..which adds height... wonder if I can find one that is >= 3/4 inch... and the Performer Airgap (NOT RPM) is a little shorter and accepts the spread bore.... decisions decisions.....
Also, what is you opinion on the weiland intakes... obviously some of you may be bias as that is what you have set up, but I'm wondering what convinced you to choose that set up? Most all I read is eddy this eddy that, I'm all ears
The only thing i'm set on right now is the AFR heads and my Q-jet..
I'm ditching the stock snorkel intake (light oil and vacume bag storage) I'm considering doing a reverse cold air set up as some others have done around here.. using the airpressure from the windshield to get cold air from the back of the hood...but thats a later project.. body is still apart from the frame and engine on a stand waiting for attention
Last edited by bryanpl123; Jan 23, 2011 at 10:43 AM.
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Le Mans Master
Joined: Jan 2004
Posts: 7,412
Likes: 75
St. Jude Donor '14
I am confused. Stock 75's all had cold air induction from the rear of the hood. So, do you not have a stock hood right now? My air cleaner has 2 ducts open to the engine compartment and a cold air induction that opens a flap on the rear of the hood under full throttle. What do you have?
Safety Car
Joined: Aug 2001
Posts: 3,685
Likes: 202
From: Waterford Mi
My 73 is the same as your 75. I replaced my intake with the Edelbrock 2101 and my Q-jet with the Holley 4175 spreadbore carb. I had to add a spacer to the top of the carb to clear the vacuum sec module so it is a little bit higher then stock. I still have the room for the original air cleaner but I do not have the seal adaptor ring. If any of you still have yours but do not use it I would be interested in buying it from you. I think I might have to modify it for the clearance so I don't really want to spend the $60 for a new one. I also removed the door so I can have cooler air all the time instead of just a full throttle.
Thread Starter
Racer
Joined: Nov 2008
Posts: 293
Likes: 1
From: Eaton Ohio
I am confused. Stock 75's all had cold air induction from the rear of the hood. So, do you not have a stock hood right now? My air cleaner has 2 ducts open to the engine compartment and a cold air induction that opens a flap on the rear of the hood under full throttle. What do you have?
I was considering doing something like others on here when they have the drop base air cleaner (can't find a link right now) where they make a fiberglass unit to create a deep pocket (u-shaped) that sits under the air cleaner/seals to the hood when lowered and opens to the rear toward the windshield. It does look a little cluttered, but very functional.
While I will probably not be able to reuse the stock snorkel with the set up I end up with, i'll still be hanging on to it (JUST in case I ever sell it... you know 50 years from now..I'm 24 now)
Safety Car
Joined: Jan 2009
Posts: 3,736
Likes: 56
From: anchorage ak
i went with wieand because at the time i got a good deal on it and the heads. wish i had gone with the rpm airgap, even if i had to change the hood, will be taking measurments some time in the next few days, all ready have the air gap will be puting it on the 400 even if it means changing the hood, which will probably be the case even if it fits with the stock hood. I went down the same road your on & wish i had just built the 400 2 years ago and saved the money but at least i'll have a spare engine.
Thread Starter
Racer
Joined: Nov 2008
Posts: 293
Likes: 1
From: Eaton Ohio
I plan on building an engine later on, but hope to be able to use the same top end when I do so... that is why I was looking at the AFR 195 vs the 180s.... it should last me on a 383 build... I'm not sure if they would flow enough for a 400??? I also have side pipes that will go on when I reassymble the car...I know they can choke down a BB....how about a Big SB like a 400?
Pro
Joined: May 2010
Posts: 737
Likes: 3
From: Pennington NJ
On my 1974, I have an Edelbrock performer intake, Holley carb, and a jegs 14 x 3 drop base air cleaner and it fits well, but the drop base is definitely required (I had to send a normal one back to get the drop base one)!
Will
Will
Safety Car
Joined: Jan 2009
Posts: 3,736
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From: anchorage ak
the 195 cc would be better for the 383, and the 180 cc would be better for the 350, if you run the 195's now you loose bottom end torque, if you run the 180's later you'll loose a little top end.I have read articles were chevy high performance ran a set of 180cc afr's on a 400 sbc & produced 490 horses power & 529 ft/lbs with a mild camshaft with 1.6 to 1 roller tip rockers and an airgap rpm, so if i had to pick between the two i'd probably go with 180's. afr has sbc combo's dyno sheets in which two of there 383 combo's make like 480 horse & 515 ft/lbs of torque with the 180's, lots of information on there web site. i wouldnt think (not know) but think that the side pipes would choke out a 400 but that would better be answered by some one with side pipes. i really couldn't see them being anymore restrictive than my full length 2.5'' exhaust.
Thread Starter
Racer
Joined: Nov 2008
Posts: 293
Likes: 1
From: Eaton Ohio
I'll have to do some more research before I make up my mind definiativly... Thanks for the info.. I was surprised I figured that on a 400 I would need 215's or something..
What are you using on yours?
I'll check out AFR's site
What are you using on yours?
I'll check out AFR's site
Last edited by bryanpl123; Jan 25, 2011 at 06:50 PM.
Safety Car
Joined: Jan 2009
Posts: 3,736
Likes: 56
From: anchorage ak
195cc afr's, straight plug, 65 cc chambers. i knew that i could have made more power with the 210's or 215's, but the rpm gose up, right now i'll make peak horse power by 6000 rpm, which i think is about perfect for the street for me, by not going over 6000 rpm it should hopefully last a little longer, i am putting a lot of money into this engine and don't want to have to do it again for a while for the corvette, i know that i will have to change the rings and bearings every so often, but thats cheap compared to the cost of the engine.
Last edited by bluedawg; Jan 26, 2011 at 01:11 PM.
Thread Starter
Racer
Joined: Nov 2008
Posts: 293
Likes: 1
From: Eaton Ohio
Update:
Well I finally decided what to buy....
I'm stroking the block w/ fully forged internals (got it half price)
Jegs(Canfield) 195CC heads w/ 72cc combustion chamber
Edelbrock Performer Airgap (non-RPM) w/ Permashine finish
I will be bolting down my body Friday and building the engine this weekend and hopefully install it to test height... I should be good to use the Moroso low profile Air cleaner as mentioned by Steve. It comes in blue which will go with my theme, but I was curious as to the spectre http://www.jegs.com/p/Spectre/Spectr...48308/10002/-1 as to if its drop base drops low enough... I like that it is more blue... and doesn't have a huge name logo on it.
EDIT::
I looked up the manufacture specs on the air cleaners mentioned above and the spectre fits .4" higher than the Moroso.. SteveG75 said with his moroso that he had 3/4 = .75" of clearence... So I should have .35" of clearence from the hood.... now is this enough when the engine torques over on a rev..?
SteveG75 is that with the stock hood intact or did you strip the original cold air chamber, or does it even matter?
I'm stroking the block w/ fully forged internals (got it half price)
Jegs(Canfield) 195CC heads w/ 72cc combustion chamber
Edelbrock Performer Airgap (non-RPM) w/ Permashine finish
I will be bolting down my body Friday and building the engine this weekend and hopefully install it to test height... I should be good to use the Moroso low profile Air cleaner as mentioned by Steve. It comes in blue which will go with my theme, but I was curious as to the spectre http://www.jegs.com/p/Spectre/Spectr...48308/10002/-1 as to if its drop base drops low enough... I like that it is more blue... and doesn't have a huge name logo on it.
EDIT::
I looked up the manufacture specs on the air cleaners mentioned above and the spectre fits .4" higher than the Moroso.. SteveG75 said with his moroso that he had 3/4 = .75" of clearence... So I should have .35" of clearence from the hood.... now is this enough when the engine torques over on a rev..?
SteveG75 is that with the stock hood intact or did you strip the original cold air chamber, or does it even matter?
Last edited by bryanpl123; Jul 19, 2011 at 10:46 AM.
