Been looking online and cant find what they even look like never mind any graphs to see a difference, just wondered if anyone had seen them, whether they are bigger/smaller than standard etc

thanks in advance

Lee

 

eat your heart out

 

Actually this is how it looks like.....

The inlet on the race cover is 5.5" and the cover clearly has Borg Warner written on it with the logo above the writing. The outlet does not taper out either.... it remains the same size

 

actually, it depends on which turbo you have. that "taper" out is called a v-band. some very large turbo's use this as a connection instead of a coupler. i promise you the pic i posted is a race cover. (hint: bullseye) hahahahaha

the above posted pics by "olyrx7" appear to be a standard cover. but what do i know...

 

My turbo is the S372, I compared it with both the regular cover(with a v-band connection) and with the aparent race cover in my photo. The race cover was much larger when compared side by side it also had the 5.5" inlet.

I understand all about the v-band connection, so maybe you could clarify it for everyone as to which is which because it seems to get confusing...

 

you see how the anti-surge in my pic has been smoothed over? it is still there, just not as obvious. thats the dead give away. the race cover is also larger and supposedly "flows" better. to be honest it isnt worth the extra $300. only reason i got it is im a dealer and they wanted me to have the special cover for my shop car.

also, mine is an S475

 

the first pic is the newer style race cover, the second the older style.
the newer style supposedly has 80hp extra on top..
but it sounds sick, similar to an t51r from what i've read; high pitched whistling.

 

olyrx7, how do you plan to make that bend at the neck of the turbo while getting the hood closed?

 

Hes not talking about the V band outlet, he meant the bellmouth inlet. Oly has the race cover on his.

The Bullseye race cover is different from the BW cover. The Bullseye has the bellmouth inlet, and Oly has the BW cover on his. I agree, the race cover isnt usually worth it, but when you are class racing and you need all the extra power you can get while still using the same inducer, its worth it.

 

or just the sound it makes could justify a purchase

 

thanks very much for all your help guys, im looking to order a s475 with a 83mm rear 1.1 A/R and wanted to know if the cover was larger or smaller because of fitment, its pretty tight looking on other builds and wondered if it was smaller it might help and if it made more power it would be worth it.

ill stick with a stock cover then as they seem pretty cheap from forced inductions at $599, though they are crap at answering emails so havent ordered one yet

 

I will be getting the Turbo installed and dyno tuned with the next 7-10 days so I will post pics at that time...

Scorpion T- Thank you for clarifying about the race covers as it gets confusing for everyone due to the Borg Warner and Bullseye setups.....

 

Please update Olyrx7, Because Im am also been the 372 or 74 but can't decide. What are your hp goals and what spool up times are you expecting?

Sorry to hijack the thread turbotoaster

 

no its fine mate, any info about any turbos is more than welcome on here.

id imagine that you could hit 600bhp on big boost with that turbo if you pushed it.

what sort of port have you got as that will effect your spool times and maybe we can give you an idea

 

I was also stuck between the two but decided that the 72mm will be plenty. I compared the S372 inducer and exducer to my T88H and its night and day lol. The Greddy made 654@29psi, so my goal is to get between 660-680whp@26psi on the S372 I hear thats when it starts to work well....

 

is a s372 just like a s472 but on a t4 frame instead, as i havent seen specs of that turbo, do you have a spec list of it?

 

Turbotoaster :
Im going to be running an extended street port. Custom divided manifold, GL LIM, Ported UIM and Im thinking about going with one of those single bladed throttle bodies https://www.rx7club.com/attachment.p...3&d=1260589146.
Im also running a water to air setup so, piping is short...

and yes... this is a street car
Thats pretty much where I would "like" to be too, but I would like to have something a little friendlier on the street (I know I cant have the best of both worlds) and can crank up when at the track.

Also, my mistake on the turbo, its a s474/s472 with a T4 foot print that I was looking at... Honestly I think they are the same.

What rear A/R are you using?

 

I have the 1.25a/r

 

Those prices are very old, BW prices went way up in the last 6 months.

No problem.

Depends on who you ask. Basically the S3xx is T4 frame, S4xx is T4 or T6 frame. Some use the turbine wheel to differentiate.

 

Also, the T6 and T4 S475 use a different turbine wheel and IIRC the shaft is smaller on the T4 units as well.

 

Some of the T4 and T6 can share a wheel, but some dont.

 

My borg warner s475 race cover. Amazing sound to them. And they are larger in diameter than the standard cover.

 

I dont think I want to go that big.. I do want to go to something that will spool quicker but has a decent top end. We dont have highways here, high ways runs are out, but we do have a drag strip .

I guess we'll have to wait to see what your spool characteristics are.

 

yeh ill be interesting in your numbers, can you also let us know at what rpm you hit full boost and type of exhaust

 

There are many different versions of the "race cover." I believe I have the newest edition... It's for sale for another week or so