Just for kicks I decided to compare Kuba23's Greddy Turbo kit with pump gas and alcohol to another member's stock turbo car with similar mods and pump gas and alcohol from today

Which car would YOU prefer to drive ?

(The stock turbo seems more enjoyable to me - but you can't beat the Greddy's top end kick)

 

This is the same two turbos compared with a 3rd car which was a 3076 turbo and aem also with pump has and alcohol

 

looks good
think i need to get on the alkey wagon

 

More torque on the stock turbo???

 

Oh yeah .. SWEET! 100% meth AL?

 

wow late spool??!?!?! 4500 about???? doesnt seem to enjoyable but it does have much top end power though, that stocker woudl take off big time in the begining!!

 

Now this is a good example for the low end torque crowd to ponder. I'll rev it to get it Al. Once that Greddy is wound up in first its bye bye baby to the stock turbo car. If I wanted a daily driver I would have an M3.

 

True in a drag racing situation you will always be in the power band in the gredy. In my own car I dont drop under 6300 rpms on the track. But on the street its easy for me to get gaught on between gears or needing to down shift - that is where the stock turbo shines - big time.

 

numbers seem a little low on the gt3076, is there room to make more power?

 

Is that a fair comparison of low end spool-up? It looks like the pull starts later on the bigger turbo and exagerrates the difference in spool-up. Would the spool-up point be the same if the bigger turbo dyno run was also started around 2700 rpm?

 

That little of a difference in start time will not affect alter when those larger turbos come into boost.

I played a little with this during my first dyno session w/ the 3076.

 

Stock Turbo Spool Line Is Sick Love It!

 

Al thanks for posting this, very interesting stuff.

Looks like the stocker makes about 150 more hp at 4k, where as the greddy makes about 100 more hp at 7.5k. It's cool to see the 2 extremes being posted together like this.

Personally if I had to choose, I think I would want something in the middle. Right now I am leaning towards a br440 which I think is a gt28r but I could be mistaken. I think a 3071 would also fit the bill. Can anyone recommend any other turbos in between the ones above?

Al do you have a br440 w/alc dyno sheet from that dyno? I couldn't find one on your website or searching evom.

 

after searching around a little, I did find this br440 on 100octane, br stage 4. It looks to be right smack in the middle of the other 2 posted above. Maybe it would perform even better with the alky?

 

Yes - we never tested a BR440 with alcohol yet - but I think it would be insane

The 3076 I posted above is a full Buschur kit with the same cast manifold as the br400 kit

In fact this customer upgraded from the 440 to the BR 3076 kit