Best spooling turbo for 550bhp
 

Hi just after a bit of advise i'm just about to fit my 2.1 stroker engine and i want to run about 500/550 on v power. I will be fitted my gt3076 for the time being. I just want to know what will be the best spooling turbo. I have been looking at the borg warner 7670 turbo or maybe a precision turbo any body running either turbo with some feedback would be great thanks

Hello mate I'm using a billet sc46 running 497bhp and 520ftlb at 1.6bar full boost by 2700rpm

For the 500 mark I'd choose either the precision turbo or mdx321V

Have you any graphs? Was this on a 2.1?

BW7670 with the 1.06 twin scroll housing on a destreoked 2.35 (low compression engine) and avcs heads. Ran 541 at 2 bar on v power

low boost 3rd gear pull


high boost 3rd gear pull

Yeah I'll grab the graph out for you no this was on a 2.3 setup

a 2.1 is a pretty small engine for good spool- and you need to remember other factors affect spool as well, uppipe and downpipe sizes headers and mapping,(assuming your on a decat). static compression makes a big difference off boost too . my own engine with cams and 9.0 compression is happy to pull onto boost at 2200 rpm in the higher gears but does,nt get into the zone until 4k rpm.
really nice nice to have a torquey revvy engine under the main boost zone though... the previous engine was like a switch and had no torque or power below 4krpm at all-literally changing down to 3rd or 4th at 70 mph to get the revs above 4k.
mines just a forged 03 newage sti on a sc54 billet.

the sc54 was always known as a lag monster. so setup is very important
.as long as the revs are over 2k it runs very well in all gears made 550-500 in march- my favourite engine so far 2.1

Forced performance red (none billet) made 531bhp @ 1.75bar , full boost by 3.7k ,,, half the price of uk turbos , very pleased with its results

That sounds very interesting is that on a 2.1. Have you got a graph cheers