LS swap oil pan? - Chevy Impala SS Forum
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post #1 of 26 (permalink) Old 08-24-2019, 09:15 AM Thread Starter
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LS swap oil pan?

What's the most common used pan and mount combo being used on swaps? I'm thinking about getting kds mounts and f body oil pan?..What do you guys think? Thanks
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post #2 of 26 (permalink) Old 08-25-2019, 06:53 AM
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I am currently using a Holley 302-1 GM and it fits great with energy suspension SBC mounts, the pan fits the cradle just like the 350 pan did. I was using the GM muscle car oil pan but it hung to low and my wagon is lowered. Sorry my phone keeps uploading the pics upside down. One is of the Holley from the rear and the other is of both.
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post #3 of 26 (permalink) Old 08-25-2019, 09:57 AM
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What mounts are you using? I'm using KDS mounts. I used a factory F body pan I purchased from Improved Racing then purchased their baffle kit for better oil control. It fits great, no issues.

the baffle kit is a must for the F body pan IMO if you are making any real power. F body guys have lots of data on LS1 tech of pretty significant oil pressure drops caused by starvation upon acceleration on cars that were cutting decent 60 foot times (we're not talking about only 9 second cars here).

I talked to Improved Racing about the baffling on their F body setup vs the Holley with optional baffle kit. turns out they were contracted to design the trap door kit for the Holley pan so the only real difference were pan dimensions.

Since the holley pans are similar in shape to the F body pan, I would imagine any oil control issues an F body pan would have, the holley pan would have too. When you add the optional baffle kit with the holley pan it comes out to a bit more $$$ than the F body pan with Improved Racing baffle kit which is why I went with the latter.

You could probably ignore all the oil control stuff if you're just doing a budget LS swap with 400hp or something.

96 BBB Pro Touring- In the works- Mods list includes functional money incinerator, should have stuck to bolt-ons button, 100 dollars in mild steel MIG wire, a really expensive air compressor and a letter from Tire Rack saying nobody makes 335/35/17's anymore. (396/AI heads/D1SC)
https://www.impalassforum.com/vBullet...formance+build --frame off build up thread
Old N/A setup http://www.youtube.com/watch?v=3ZvPZi9fL8k 396, LE2 heads, TH400

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post #4 of 26 (permalink) Old 08-25-2019, 11:09 AM Thread Starter
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I'm planning on kds mounts...Car has a 6.0 swap already...But has a modified truck pan that has seen better day's...Transmission is from the donor truck also..Oil pan is close to suspension, and transmission crossmember hole has been slotted for trans mount to line up...Almost like engine sits a few inches forward...Hoping kds mounts can remedy this?..
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post #5 of 26 (permalink) Old 08-25-2019, 11:11 AM Thread Starter
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Quote:
Originally Posted by Frasierraheen View Post
I am currently using a Holley 302-1 GM and it fits great with energy suspension SBC mounts, the pan fits the cradle just like the 350 pan did. I was using the GM muscle car oil pan but it hung to low and my wagon is lowered. Sorry my phone keeps uploading the pics upside down. One is of the Holley from the rear and the other is of both.
Last pic is muscle car pan?
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post #6 of 26 (permalink) Old 08-25-2019, 09:30 PM
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I went this route --->> MuscleRods 91-96 Impala LS Conversion Kit

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1996 BBB SS, 398ci Solid Roller LT4, TorqHead 24x Conversion


1995 DCM SS, LS3, Texas Speed 260cc PRC heads, Lingenfelter GT1-1 cam, V-max 90mm TB, Headman 1 7/8 LT Headers, 2 1/2" cat-back, 3200 Circle-D TC, 3.73 gears -- 493HP/434TQ @ the wheels (Daily Driver)


2014 Chevy SS; Low Lash Solid Roller 429ci LS3 -- 548HP/464TQ @ the wheels....

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post #7 of 26 (permalink) Old 08-26-2019, 07:11 AM
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I have the full holley kit with baffle and all, I'm also running a high flow/high pressure melling oil pump so I dont have any oil starvation issues has of now, almost 10k miles and my little turbo 5.3 is still kicking butt

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post #8 of 26 (permalink) Old 08-26-2019, 10:04 AM
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Quote:
Originally Posted by rays rides View Post
I'm planning on kds mounts...Car has a 6.0 swap already...But has a modified truck pan that has seen better day's...Transmission is from the donor truck also..Oil pan is close to suspension, and transmission crossmember hole has been slotted for trans mount to line up...Almost like engine sits a few inches forward...Hoping kds mounts can remedy this?..
If you are planning on swapping to KDS mounts, the mounts were designed to work with the F body pan so that will work fine. The holley pan also fits so it's just a matter of preference at that point.

Just keep in mind that a lot of LS swaps I've seen with adjustable mounts place the engine a decent amount forward from where the factory drivetrain would have sat. The KDS mounts retain the stock drivetrain angles, engine placement (front to back) crank centerline height I believe which to me was a big selling point because I don't like the idea of moving the single heaviest component of your car even an inch more forward or higher than where it was before. Issue with this is if you swap mounts, there is a good chance your current headers may not fit and you may run into some other minor clearance issues from the change of positioning.

As far as the slotted X member goes, this is more than likely because of the mounts you currently have, and with the KDS mounts you should be able to run a factory crossmember IF you are still running a Gen2/LT1 4l60e. I swapped over to an LS 4l60e and the trans mount position was WAY further forward than the LT and I had to do some extensive modifications to my tubular X member.

Another note, KDS mounts provide 3/8ths of wiggle room by having slotted holes to account for chassis to chassis variations. To clear the F body pan I had to run my motor in the furthest to rear position. Aside from some clearance issues I had to address with my LSA supercharger and tall style valve covers, everything fit fine and this actually helped give me a little more clearance to the K member of my 1 7/8ths TSP headers.


Depending on what headers you have now, it may just be easier to find a pan that works with your current mounts rather than risk running into header clearance issues and possibly AC compressor clearance issues by swapping to KDS mounts. KDS mounts work great with a very specific part selection (F body pan, F body headers, truck accessory drive) but if you don't already have all of that, it could be troublesome to switch over to them. I can't remember if a truck AC compressor clears without notching the chassis either, you may have to run a mini compressor.

96 BBB Pro Touring- In the works- Mods list includes functional money incinerator, should have stuck to bolt-ons button, 100 dollars in mild steel MIG wire, a really expensive air compressor and a letter from Tire Rack saying nobody makes 335/35/17's anymore. (396/AI heads/D1SC)
https://www.impalassforum.com/vBullet...formance+build --frame off build up thread
Old N/A setup http://www.youtube.com/watch?v=3ZvPZi9fL8k 396, LE2 heads, TH400

Last edited by SSandman; 08-26-2019 at 10:19 AM.
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post #9 of 26 (permalink) Old 08-26-2019, 10:50 AM Thread Starter
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I'm running a ls 4l60e.A.c. compressor mounted high..alternator lower drivers side..
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post #10 of 26 (permalink) Old 08-26-2019, 11:42 AM Thread Starter
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Ls1 fead is what I'm running..
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