I've been looking at the dyno graphs from various tuners. So far, all of them suffer a torque dip around 3000rpm comparing to stock.

We use the car for autocross and the torque at the low-end is critical. It's nice to have a lot of torque at the top end while driving on the tracks. However, I don't want to lose torque at the low end.

Is there anything out there that increases HP but doesn't cause the torque curve to dip below stock at low rpm?

 

Have you looked at the Dyno on the Evoms.com website?
Check the stage one (GIAC) Diverters, filter and chip.

 

No loss with GIAC versus stock at 3000 rpm.

 

We actually create more TQ then the stock setup and sooner. Check the search side of the fourms. I have posted a lot of dyno sheets. Only gains, no loss of anything.

 

I had the stage 2 evo/ia/giac tuning. I had a Cargraphic exhaust, dv,airfilter, and stage 2 giac programming. I can assure you I certainly didn't lose any low end torque. The car pulled much harder across the rev range and turbo lag became non-existant

Lou

 

Thanks for the info guys. Looks like IA and EVO got the low-end tuned.

How come the same GIAC program that many other tuners use produced different results? Is it because of they each have a slightly different version of the software? Or their dyno machines or the methods they dyno the cars are different?

Both of them are far away from NJ where I am. I sure wish some of them are closer.

 

Thanks for the info guys. Looks like IA and EVO got the low-end tuned.

How come the same GIAC program that many other tuners use produced different results? Is it because of they each have a slightly different version of the software? Or their dyno machines and/or the methods they dyno the cars are different?

Both IA and EVO are far away from NJ where I am. I sure wish some of them are closer.

 

There NEVER is any low end loss with just chip, exhaust, etc. Why would there be? Tuners are not that clumsy.

Low End Loss only happens with larger turbos.

 

It looks like htere is a low end loss because the mid and up gain is so large. It is just an optical illusion but as everyone hase sated, if you ovelay the graphs, there are in fact gains across the board; jus tnot as much at the low end as at the mid-high end.

 

Also you could be looking at losses if different turbos are used. Stock non x-50 turbos will spool faster.

 

My car with Upsolute and Remus dyno'd about 30 ft.lbs. more than stock at 3200 rpms.

 

Periokid hit the nail on the head. Here is an example

http://www.awe-tuning.com/pages/info...cfm?content=33

One of my questions still remains. Are all the GIAC stage 4 programs the same? Or they differ from tuner to tuner?

 

the giac programming i belive is the same for all stage 4 programming. Keep in mind as Tim stated, K24 turbos have more lag and thus make greater hp at higher rpm, but, they still have gains over stock at low end. My car had the k16 turbos which spool much more quickly and I had tremendous low end gains.

Lou

 

Here's a graph of Evo's Stage 4

HORSEPOWER




TORQUE






LOU

 

Wanted to add that cars are different, some come from the factory stronger or unfortunately a little weaker. My car ended up with corrected hp of 505 which is equal to the stage 2 graph(not posted, but on evoms website) but, my corrected torque was 575lb/ft

Lou