Ask murlo he had one made , or that might have been a 3.5. PM me if you need one made , i'll ship you the info of who made mine.

 

I have a 3.5", yes.

And I'd still say the black is better if you are on race fuel.

 

I'm not saying one would be better than the other , but what's the reasoning your thinking i assume your comparing GTX30R vs FP black right ?

 

As others have said the FP turbos tend to like race fuel/E85 so they can run high psi to overcome the small hotside. Obviously not ideal but when its a bolt on its very convenient.

 

The HTA wheel design flows better at higher pressure.. No different than even the t3 versions.. They get real efficient at 25 and 30+ psi of boost all the way up..

Mike

 

Yep, no arguments here....they aren't pump gas turbos is what I was getting at.

Which is why I ran 38psi on my black Thanks for the backup Mike!

 

well both turbo's have there advantages , curious to see if the ATP still has all those weird problems they got plagued with before , although i'm running an external wastegate and 4in intake so it's not exactly the way it came from ATP.

 

The WORKS Evo has been running the standard Garrett Evo X 3076 for about a year I think with the internal wastegate.

 

yes i'm aware , but infact there are 3 revisions of that housing from ATP . Although crossing fingers this one has non of those issues.

 

Interesting how they have 3 revisions... My flange totally warped again after running it on Paul's car at the Summit Point this last weekend. We had to MIG weld the flange from the inside to get it to seal since one of the bolts stripped out it warped so badly. For any kind of track driving that small wastegate flange needs help. :P

My car is getting aligned right now but soon I will be reporting back on how the new GTX30 responds in a single scroll custom setup that STM put together. We're using a Tial .82 vband housing, 4" surge ported compressor housing, 3.5" MAF intake pipe, and top mount exhaust manifold using 1.25" runners. At low throttle inputs the car feels good, we'll see how it compares to the twinscroll especially since the ATP O2 Downpipe setups with external gates basically ruin most of the twinscroll effect anyways. I'm guessing quite a bit more top end with a slight hit to spool and response but we will see.

Teaser Photos:



I'll have final placement pictures soon and dyno middle of next week.

Never mind the temporary tab holding the turbo in position, final setup is wild looking with the turbo exposed like that. It has a T3 turbo blanket to control heat and the vband downpipe will be wrapped as well once it's all 100% verified as good to go.

 

Hiboost, looks sweet! I was thinking, maybe use the stock bracket that bolts to the turbine housing, and make a brace that goes from that to the downpipe to help support the weight?

 

One thing i did notice was the lower tq # compared to the regular 30R would need to compare the dyno sheet's but i'm pretty sure there's a 2-300RPM difference in spool but the big difference is there isn't as much back pressure. It feels like the older 35R non HTA without the lag honestly

 

Hi Chad .. BBX full .. 28psi 420g/s

Boost is about 2-300rpms faster than the 3076 .. transient response is obviously worse than the ball bearing ..
peak flow is more than the GT3076
torque / flow is lower than the GT3076 below 21psi .. probably thus accounting for some lag (maybe the ballbearing advantage /efficiency I dunno *shrug*)

make no doubt about it for that size .. it is a laggy turbo .. engine starts waking up around 3000+rpms .. below that it doesn't really want to move ..

 

Updates? I'm really interested in your build. To me the single scroll BB turbos usually feel better then similarly sized twin scroll stock framed JB turbos...when it comes to transient throttle response at higher rpms anyhew. There are of course, a whole lot more factors involved.

 

our BBK full comp wheel is larger than a 3076R comp wheel-

for most people we recommend the BBX lite- because we make all but the same peak power below 7600 rpm with it- (bolt ons, 2L) but make more torque and quicker spool

cb