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Hey guys,
I'm looking to get a polished LS1 intake for my 98. I'm not looking for covers, I went that route already.
I checked out one on Jegs and Summit, and called the company and was told I would have a clearance issue and would probably need to get a different hood if I went with that intake.
Does anyone know where I can get a polished ls1 intake that would not require me to have to change out parts to make it work?
Also, I'm not looking to race my car, so getting a high performance intake is not what I'm seeking.(even though I have a ported throttle body, air intake, headers, exhaust, and the car was tuned...)
Any direction would be appriciated...
Weiand/Holley offers this intake in raw aluminum and also polished.
Its based on the LS6 internally with a few improvements. John Lingenfelter had a hand in its design. Installs like a regular intake but uses paper gaskets which are included. Holley sells a replacement gasket set should you need them.
Mine is a 10 year old limited version (called the signature edition) that had John Lingenfelters name on it. Most simply say Weiand.
I got mine raw (casted rough) and took 3 weeks to sand and polish. Trust me, buy the one already polished. If you daily drive the car I'd recommend against it because rain water mist/muck dries on and its a lot of upkeep. My car is a garage queen so it stays sharp and maintenance is almost nonexistent.
Took these pics 5 minutes ago for you. Everything is polished except the fuel injectors which are painted high heat silver. The coil packs and wiring are relocated/minimized.
Performance or driveability wise, are there any negatives to running this manifold? I'd like having a polished intake, but no fake covers, only the real thing.
The only difference with aluminum versus plastic is the potential for heat soak. Doubtful you'd feel the difference or a dyno would tell much difference if both being identical aside from material, but that's the negative argument. That being said small blocks have been running steel/aluminum intakes since the 1950s so its not like its a problem.
The Weiand is marketed as a slight improvement over an LS6 intake so it would certainly be an improvement over an LS1.
Your engine looks great. Where are the coil packs?
Thanks. The coils are inside the fenders. Simply mounted the entire bracket. Made a custom length spark plug wires and also a harness extension for the coil pack.
VERY impressive! I can’t find evidence of the plug wires in your engine pix! Was there a concern about voltage drop due to the increased length of the wires?
VERY impressive! I can’t find evidence of the plug wires in your engine pix! Was there a concern about voltage drop due to the increased length of the wires?
No voltage drop. I run the engine up to 6900rpm with the hotter camshaft and other mods. It screams. Just like the metal intake manifolds on earlier small blocks... long spark plug wires (compared to the LSx family) have been used for decades. I made the wires using 8mm Taylor's so they're quality to begin with.
Here's a pic from when the engine was going together. The wires run along the frame and then go straight to the spark plug. Being black you hardly notice.
As a side note in the first few pics, you hardly see the fuel injector harness because the wires are under the fuel rail itself so they are mostly hidden. My goal was to make the engine as clean and uncluttered as possible.
Josh's underhood area looks amazing!. One of my few complaints about the C5 looks wise is the underhood area, where I think there is just too much plastic. I would like to add some chrome, but mine will also not be a garage queen, so I'll need to be very prudent about where I add it...
I don't know about the Weiand specifically if it can support something like this and maybe even ~Josh can speak to it but if there is concern for heat soak there are a good amount of people running thermal barriers on their intakes. SuperChevy did a story on one such product some time back using a C5 with an LS6 intake swap, some bolt-ons, and a tune.
Obviously any actual gains would vary and may even be difficult to determine. However since IM's product there have been other people that create thermal intake barriers and it's also very easy to make your own for sub $40.
Last edited by Velocity_Vette; 06-12-2018 at 05:26 PM.
Reason: edit for grammar
06-11-2018, 06:23 PM
Chrome/Polished LS1 Intake Manifold
man that looks like a ton of work but it turned out great 
