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75 Corvette auto with a 1980 Z-28 engine (LM1) in it. Stock heads and Intake manifold. Headers, no cats, maybe a mild cam but not sure. Carb is an 800 cfm Q-jet overhauled by Lars in late 2022. A guy in the neighborhood has an Edelbrock 2101 for sale cheap and I thought to pick that up to throw on at some point. It is worth the $85 he's asking for the intake based on the rest of my engine? Could I expect any notable gains at all? I'm happy with the performance of the car as it sits but another few HP for little money might be worth it.
Id do it, especially at that price! The 2101 intake has a blended height of 4.05 so it'll fit just fine. They have a fuel line kit too so the drop base air cleaner will work
2020 Corvette of the Year Finalist (performance mods)
2019 C3 of Year Winner (performance mods)
2016 C3 of Year Finalist
dual planes are good for power below 5000 rpm, more for torque. Open single planes are good for top end HP. you may get 5-10 hp with a stock or mild cam and stock heads due to the poor to avg flow. If you improve the heads then the intake will really help with the flow. Engine power is made with the ease of the air/ fuel coming in, and going out, and how much volume you can get . good heads and a decent cam with 10:1 compression will make a decent amount of power. But just one or 2 things alone wont make a lot of power, its the combination of the parts. The headers and a good 2.5 inch exhaust help get the exhaust out whgich isw like uncorking a dam, then bigger the hole the better the flow, to a point.
You asked a simple question whether to purchase the Eddy 2101 or not.
Yes. And that is about the going rate on Ebay.
Not much power gains but will knock-off a few pounds with the aluminum.
But more importantly, those Eddys look great on an orange engine, a black engine or a blue engine.
Go for the bling.
But please, don't use your old bolts or some bolts from the local hardware.
Splurge for the ARPs 12-point Intake bolt kit in either black or stainless.
Even more bling.
Years ago Chevy High Performance mag did a write up called "The Goodwrench Quest" on a Goodwrench 350 which is the same as a L48 and LM1. With that Manifold they gained horsepower. It also loss a lot of torque below 3000 RPM.
Last edited by Fly skids up!; Jul 10, 2024 at 10:58 AM.
2020 Corvette of the Year Finalist (performance mods)
2019 C3 of Year Winner (performance mods)
2016 C3 of Year Finalist
Originally Posted by Fly skids up!
Years ago Chevy High Performance mag did a write up called "The Goodwrench Quest" on a Goodwrench 350 which is the same as a L48 and LM1. With that Manifold they gained horsepower. It also loss a lot of torque below 3000 RPM.
ITs worse becasue the timing and tune wasnt optimized for the new parts...thats a bad data set from and an equally bad scientific take. They should have done the same three tests with an actual tune test following the test results after the change to show how much better the tune could be improved with the better flow. Thats like taking a 350 and turning it into a 383 and using the same timing, and carburetor settings...
Headers for the win !! Edelbrock clearly is ahead from 3400 up and will probably add even more with a mild cam , if it's an automatic 2500 to 3000 converter would help and if it's a stick rev it up a little bit more from a stop
ITs worse becasue the timing and tune wasnt optimized for the new parts...thats a bad data set from and an equally bad scientific take. They should have done the same three tests with an actual tune test following the test results after the change to show how much better the tune could be improved with the better flow. Thats like taking a 350 and turning it into a 383 and using the same timing, and carburetor settings...
True, most hotrod rags are garbage. However based on my personal experience I've experienced a loss of low end power with aftermarket intakes. The time slip of truth has humbled me many times. Richard Holder put out a good video on this subject. I'll link that video. To the OP, if you want more oomph, lower the axle ratio. If you do decide on that $85 gem, bring a straight edge with you and check for warpage. Just my $0.02 on the whole subject.
Hmmm...well despite the appeal of the bling factor. The possibility of losing some torque vs gaining a couple of top end HP is not very appealing at all since this is just a cruiser car for me.
I appreciate all the excellent input from everyone.
That's all hear say hear say.
Fact is, single plane Intakes are for Top-End. They go to work above 4 grand.
Dual Plane Intakes are for low-end grunt. Just read the data on the 2101. From off-idle to 5,000. Plain and simple, street use.
The Eddy 2101 is a dual plane. If someone installs a Eddy dual plane and loses power, they need to do some tuning.
Edelbrock does not sell Intakes aimed for street, to lose power. Not going to happen.
Last edited by HeadsU.P.; Jul 11, 2024 at 07:07 PM.
That's all hear say hear say.
Fact is, single plane Intakes are for Top-End. They go to work above 4 grand.
Dual Plane Intakes are for low-end grunt. Just read the data on the 2101. From off-idle to 5,000. Plain and simple, street use.
The Eddy 2101 is a dual plane. If someone installs a Eddy dual plane and loses power, they need to do some tuning.
Edelbrock does not sell Intakes aimed for street, to lose power. Not going to happen.
I have been using Edelbrock Intakes for decades and I have always been happy with their performance. I currently have a Edelbrock RPM Air Gap intake on my 427 and a Holley Stealth Sniper EFI on top of it. The Air gap feature is nice and it does help with heat and keeps the intake charge air cooler as well.
The car has a 427 that is putting out lots of Hp along with locomotive style torque so to be honest I have not noticed any missing horsepower. I have been using the Edelbrock parts on my Corvettes for decades. I recently switched out a cast iron Stage 2 Stewart water pump for an all aluminum one from Edelbrock.
I don't think you will ever go wrong buying Edelbrock parts like an intake manifold.
I don't think you will ever go wrong buying Edelbrock parts like an intake manifold.
The Edelbrock 1406 carburetor, and the awful valve covers and air filter assembly that the PO installed on my 79, would like to disagree with that statement.
Listen, everything has it place. There's nothing wrong a high rise intake for a street car, GM used one on the original LT1. But that car had a camshaft that worked at higher RPM, an axle ratio that applied more torque to the rear wheel and allow the engine to get to it's power range quicker. GM engineers were some very smart people. They knew how to package a car. If a high rise was so great, they would have put them in station wagons and pickup trucks. Remember camshaft, intakes, etc. doesn't make more power, it shifts the power band around. It also makes no sense to have an intake that has one power band range and and camshaft with a different power band range with an axle ratio that works with neither.
2020 Corvette of the Year Finalist (performance mods)
2019 C3 of Year Winner (performance mods)
2016 C3 of Year Finalist
Originally Posted by Fly skids up!
Listen, everything has it place. There's nothing wrong a high rise intake for a street car, GM used one on the original LT1. But that car had a camshaft that worked at higher RPM, an axle ratio that applied more torque to the rear wheel and allow the engine to get to it's power range quicker. GM engineers were some very smart people. They knew how to package a car. If a high rise was so great, they would have put them in station wagons and pickup trucks. Remember camshaft, intakes, etc. doesn't make more power, it shifts the power band around. It also makes no sense to have an intake that has one power band range and and camshaft with a different power band range with an axle ratio that works with neither.
I fixed it for you. Now your statement makes more sense. As for high performance intakes on station wagons and trucks, the accountants would say no. You have to take into account the year the cars were being built as they did start to make some of those vehicles with performance options over at Dodge. But when the 70s hit the scare mongers took over and fuel economy was more important than performance. And don't confuse corvette performance parts with other cars of the time, the hood height limited the intake heights severely on all cars except the L88 which had a normal height tall intake and we got the L88 hood because of it. Performance in an engine is marked by its efficiency. More efficient, is more power, which uses more fuel effectively. But don't confuse that with poor mileage due to a bad tune
2020 Corvette of the Year Finalist (performance mods)
2019 C3 of Year Winner (performance mods)
2016 C3 of Year Finalist
You said "cams and intakes don't make more power".
That's not close to true. Even a bigger cam in a stock engine will make more power, not much, but more due to flow restrictions in and out. Add a better intake it goes up a little or add headers, it goes up a little. Add both it goes up quite a bit . Add great flowing appropriately sized heads and you can get 100 hp easy with the other additions. Just porting an old cast head can do that, but it's very cost prohibitive since aluminum heads can do it better and lighter which in effect adds power
Intake Manifold, Worth it on my Engine?
