On a 20g9 WR and modest 22psi how about 390whp (mustang). High boost (30 psi falling to 23-24), how about 445whp (mustang). This is evo8 264/264 hks cams, stock block and head. My buddy's car was a evo9 mr and 421 whp and 450 torque at 30 psi peak falling to 23-24 on a (mustang dyno).It can be done happily.

 

turbotrix 50 trim. 410-450 on pump.

 

My car has full boost by 4000 RPM on the street in 3rd gear. Less aggressive setups (read: no VSR intake, smaller cams) will spool much earlier.

l8r)

 

That's making claims on the street. We can only make claims from comparative dynographs, and they hit peak torque at 4500 or so. My stock turbo hits full boost around 4200, and I am sure your 50 trim doesn't spool earlier. It's important to use the proper comparisons when making spool claims. Basically, the 50-trim will spool 700-900rpm later than a stock turbo.

 

For street racing / auto-x / time attacks, having the boost/torque/power come on EARLY is much more important than having peaky output.

The stock turbo starts coming good at about 3000-3500rpm (assuming stock engine, normal gas, no nos/alky/etc.) and about 320-390HP, correct? The 50 trim starts at around 4000-4500rpm and would be good for 400-450HP, the larger turbos 5000-6000rpm but cannot be used with stock engine without re-inforcements like head studs and similar... I think this is a good summary?

 

No, we go up to 8k on the stock engine/head. 5-6k is only the beginning...

 

you should have no problem getting those number with the IX i got hooked on HP thats how easy it is.

 

I don't necessarily agree with having power come on early ... what you really want is a wide powerband. You can run bigger turbos on the stock block if you're planning on running pump gas only. Once you add better fuel into the mix, you'll want to start looking at beefing things up.

Here is a comparison of the spoolup on my car of "stock" (sorta) versus various 50 trim setups. Again, the current state of the car (red line) hits full boost at 4000 rpm on the street in 3rd gear.



l8r)

 

well i dont now if people that responded know this, but you can increase/decrease the size of the compressor wheel or exhaust wheel (coined hotside by evom sackriders) for quicker spoolup. The efficiency map for the turbo will change, but it depends on what you're trying to accomplish.

That's what the GT3065 ,GT30xx is.. the xx is traditionally garret's way of labeling the size of the compressor wheel. But then again, companies like buschur, forced performance, ect modify the turbo and rename it completly different so you'll have to research more. Those that want a GT35r ect. probably don't even know what that means. A bigger turbo doesnt necessarily mean better in terms of "throttle response" or what you're trying to accomplish.

 

guys...i tried looking on AMS's website for the 50 trim and couldnt seem to find it..
i would really appreciate it if someone posts a link..

thanks

 

I think more like 8.8k than 8k on stock head/block!!

 

excellent information. Can you go into a little more detail about how the different turbos get their name? like a 16g is what size compared to a garrett 30xx vs a 50 trim? I always assumed this just depended on what company made it.. how do the sizings compare ( if its even comparable?)
Thanks.

 

No, it's not. People who are revving to 8.8k have a spare motor waiting for when the stocker lets go. You do not want to be doing this on a constant basis if you care eve na smidgen about reliability.

 

Yeah, ok. We're not talking Honda motors here. 8k is pushing it far enough and well outside the powerband for any stock like turbo.

 

I tried that on a 3071 (went from a .63ar to a .48ar) and spoolup did not change at all, though peak torque took a big hit.

I also tried both the Garrett and PTE housings on the 50 trim, and spoolup didn't very much, but the PTE made slightly better power up top.

l8r)