good topic, im interested in what people reply
Top Mount Vs Bottom Mount
I would say this is a good arguable topic 
What are the pro's and con's of both The Top-Mount and Bottom-Mount Turbo mani's
If you have an After-market Turbo mani. Treat this like a reveiw and tell us what you do and don't like about it
ALright here we go so far:
Top-Mount:
Pro's:
- Looks Good
- Easier top Access & Work on
- Bigger Turbo Variety
- Most likely will be a tubular equal length, which will see gains over stock log/cast
- Shorter IC Piping can be used for a V-Mount
- Hides The wastgate
- Show Off Your Pretty Compressor Housing
- Can Keep A/C
Con's:
- Clearence Issues w/ MC?
- Cost
- Always have to use an aftermarket turbo
- Do not effectively use Space
Bottom-Mount:
Pro's:
- Can use stock turbo, or related small sized turbo's
- Less Heat Spread
- Shorter Downpiep w/ Less Bends
- Piping For FMIC is Low & Out OF the way
- Shorter Turbo Oil Lines
- Easier Access to Manifold Studs
- Easier To Access SOHC KA Spark Plugs
Con's:
- Access Sucks
- Limited Turbo Size
- Limited space
What are the pro's and con's of both The Top-Mount and Bottom-Mount Turbo mani's
If you have an After-market Turbo mani. Treat this like a reveiw and tell us what you do and don't like about it
ALright here we go so far:
Top-Mount:
Pro's:
- Looks Good
- Easier top Access & Work on
- Bigger Turbo Variety
- Most likely will be a tubular equal length, which will see gains over stock log/cast
- Shorter IC Piping can be used for a V-Mount
- Hides The wastgate
- Show Off Your Pretty Compressor Housing
- Can Keep A/C
Con's:
- Clearence Issues w/ MC?
- Cost
- Always have to use an aftermarket turbo
- Do not effectively use Space
Bottom-Mount:
Pro's:
- Can use stock turbo, or related small sized turbo's
- Less Heat Spread
- Shorter Downpiep w/ Less Bends
- Piping For FMIC is Low & Out OF the way
- Shorter Turbo Oil Lines
- Easier Access to Manifold Studs
- Easier To Access SOHC KA Spark Plugs
Con's:
- Access Sucks
- Limited Turbo Size
- Limited space
1 - 17 of 17 Posts
no bottom mount love Personally, I think bottom mounts look better. They give the engine bay a cleaner, stock look. You can also run a bigger turbo with a bottom mount, brake mc clearance is not a problem, and it makes it easier to fabricate a downpipe. They are hard to work on though. Top mounts are easier to work on, but are limited in the turbo you can run. The small clearance from the turbine to the brake mc can melt the mc which can spell disaster. I've seen some KA-T setups where the turbine pretty much touches the brake mc.
Personally, I think bottom mounts look better. They give the engine bay a cleaner, stock look. You can also run a bigger turbo with a bottom mount, brake mc clearance is not a problem, and it makes it easier to fabricate a downpipe. They are hard to work on though. Top mounts are easier to work on, but are limited in the turbo you can run. The small clearance from the turbine to the brake mc can melt the mc which can spell disaster. I've seen some KA-T setups where the turbine pretty much touches the brake mc.
I forget what turbo (might have been a gt30) he was running but enthalpy laid down 539 using a top mounted turbo. i couldnt see how you would ever need anything bigger than that.ASIA said:no bottom mount love
The updates have been made and thank you guys for you comments
Shorter IC piping for a top mount if you'd doing a VMIC
Bottom mount is way better on a street car.
Far less heat emmitted onto surrounding car parts, shorter downpipe with less bends, if you're running a conventional FMIC, the piping is lower, shorter and out of the way. Shorter oil drain, easier access to the manifold studs, turbo>manifold bolts and spark plugs if you have a SOHC. When you concider the top mounts usually have a big empty space under them, they arent effectively using the space under the hood. A well mounted bottom mount can run any turbo. I ran a GT30R on my SOHC and had TONS of room bottom mount. The outlet on the turbo sat level with the opening where most people run their downpipes so it had an awesome exit out of the engine bay.
Top mount is nice because you can hide your wastegate, show on your polished compressor housing... run v-mount (which most people never do), you can keep your AC, and like others have said, better access to the turbo.
Far less heat emmitted onto surrounding car parts, shorter downpipe with less bends, if you're running a conventional FMIC, the piping is lower, shorter and out of the way. Shorter oil drain, easier access to the manifold studs, turbo>manifold bolts and spark plugs if you have a SOHC. When you concider the top mounts usually have a big empty space under them, they arent effectively using the space under the hood. A well mounted bottom mount can run any turbo. I ran a GT30R on my SOHC and had TONS of room bottom mount. The outlet on the turbo sat level with the opening where most people run their downpipes so it had an awesome exit out of the engine bay.
Top mount is nice because you can hide your wastegate, show on your polished compressor housing
... run v-mount (which most people never do), you can keep your AC, and like others have said, better access to the turbo.
Thank you for contributing
You said That w/ a Top mount you can keep A/C?
Does Bottom mounts get in the way of The A/C?
You said That w/ a Top mount you can keep A/C?
Does Bottom mounts get in the way of The A/C?
1 - 17 of 17 Posts
