y'all need M3 cowls, 335D coolant tank, and OFHG block off plate with stainless steel AN Oil lines / external thermostat mounted cleanly... then your engine bays will be perfect 
Precision 6266 Vs. 6466 (Goal - 700whp)
- Thread starter Clean WHP
- Start date
y'all need M3 cowls, 335D coolant tank, and OFHG block off plate with stainless steel AN Oil lines / external thermostat mounted cleanly... then your engine bays will be perfect
Show us how it's done!
Absolutely. But that isn't against the rules either
Sometimes that bias is born out of facts.https://bmw.spoolstreet.com/documents/ad-engineering-single-turbo-install-diy.29/
The heater core exits the driver side. It goes to the thermostat on the passenger side. When you relocated the expansion tank, correct me if I'm wrong, but you have to run another line back to the driver side. That is silly to me, just my opinion. More potential for leaks, extra hose to route, etc.
Are we talking pro-con of top vs bottom or are we talking installation integrity? Because I don't think there is any doubt that a bottom mount requires less babysitting and therefore, is more reliable and less likely for the average person to encounter issues. Fact. Go run some numbers, bottom mounts have less problems and its not hard to figure out why. It doesn't need as much precautionary work to make it a sound install.
Right now, there is a post about someone melting their AC lines. People talking about how theirs broke, getting freon in their face, etc. I tried to buy an ER CF engine cover once. Thing was burned to a crisp on the edge. When have you heard someone say, "Oh man, I burned my frame rail". "Today, I melted my oil pan, please help".
There are certainly some very clean top mount installs, but it doesn't change the fact that a bottom mount has less catch 22's.
If we are getting nit picky though, top mount mac solenoid placement is usually an eye sore. Looks like I should put my clothes out to dry on the lines
The top mount looks great, is easy to service. But the integrity of a bottom mount installation is far more likely to be reliable. If your turbos aren't failing, then the servicing part is mostly irrelevant.
Do bottm mounts have less issues, or is the vast majority of people that are single turbo, run top mounts because no one wanted to pay almost 8k for a single kit? True, I have no problem admitting there are less "problem" areas on a bottom mount kit. I also firmly believe anyone with an IQ can see the things they need to prep when installing a top mount kit to keep from ever having issues or having to babysit.
For years and years, bottom mounts were the only option. The more parts involved in a machine, the more potential for failure. No matter how well it was put together. But your logic here is starting to sound like a hybrid turbo defense.
Also, price for bottom mounts is going to hit rock bottom soon. I've been preaching this moment, but 2018 will be the year bottom mount picks up momentum again.
The reason people run topmounts is simply because it's 2-3k cheaper then the bottom mount. If budget isn't an issue go bottom mount. You dont have to worry about melting everything or relocating things. I wonder has anybody made a kit using that spa t3 manifold. You could easily get 800whp out of it
Bottom mounts are great for heat management. I don't need to wrap anything or use a turbo blanket. And i'm T4 divided too
So anyone in here have tried both to actually know what the heck they're talking about?
From a different angle, for those dealing with emissions, bottom mount looks way more stock and really difficult to see that anything is different. I'm not sure what would happen in my world with a top-mount, going through emissions.
Filippo
Filippo
No idea for example what would happen going through California emissions. Have to think that would be a nightmare with a top mount.
I lived in Florida so you can do whatever you want. I have jp topmount on my car and some of locals have a bottom mount Motiv setup and another has the old school ftec bottom. Heat management is a big thing when it comes to the top mounts. But like I said before the biggest reason people have top mount instead of bottoms is because of price. You can get a top mount 3-4500 but bottom mounts run from 6500-7900.
Hey hey, not to revive a 3 year old thread, but bottom mounts as Tyler has predicted are actually cheaper than most top mounts now. Going for 3-5k with turbo from speed tech now. 
. Getting a speedtech bottom mount. Was looking to see 6266 vs 6466. What did you end up with?
. Getting a speedtech bottom mount. Was looking to see 6266 vs 6466. What did you end up with?
So i should go with a 6466 over a 6266 as well. I was too fixated with the idea smaller turbo faster spool.
The spool is basically the same.
Google 6266 vs. 6466 and you can see how they spool almost identical but the 6466 has more top end headroom.
Again both can max out a stock block on full E85. But I don't see they reason to go with the 6266 when they spool basically the same. You will not notice it on the street, only on a dynochart. 100-200rpms slower max iirc.
Is there any particular reason more people aren't going with BW EFR's? Between the bb chra and the TiAl turbine wheels, it doesn't seem like any other similar sized turbo would be able to touch it regarding spool and responsiveness. I know they're expensive, but they seem like they'd be worth it.
Size, they are very large. But yes that would be a very nice turbo to use. or a water cooled new garret. Their new line looks sweet!
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