JBrady

Just reviewing the dyno charts for the GS and IS300s at the SRT web site http://www.swiftracing.com/engine/ecu.htm

and was surprised to find that the stock GS300 has 174rwhp and vs the IS300 at only 155rwhp. The GS also has a 13lb of torque advantage at 180 vs 167.

With the SRT ecu/air intake mod the GS gained 12hp/7tq vs the IS gain of 11hp/6tq. This would suggest either the IS drivetrain "eats" more power than the GS (hard to imagine) or the GS in reality has MORE than a 10hp advantage. Compare a stock IS with a SRT equipped GS300 and you have a 31 horsepower and a 20 lb/torque advantage. Anyone raced an IS with a GS300?

LexusRules

when i get the TC and the HFI/ECU i'll see if i can find an IS to race, i bet with exhaust intake and tc i could kick he ***

theanimala

Good question. Perhaps one of the cars was faulty or abnormally strong (like me )

LexusRules

how many cars ARE abnormally powerfull? how many weak? thanx

biggie27

actually I think my car was abnormaly strong since I have a 99 gs400 with 18"giovanna Rio's, 2 12" pioneer premiers subs and all I had at the time as a mod was a rmm first gen. air intake (which realy suck but make a realy cool sound ) and I raced a bone stock gs400 with the 16" rims and we were head to head from 0-140mph which I thought was amazing I thought for sure he was going to beat me but he didnt so its either my gs was abnormaly strong or his was weak

JBrady

Biggie, what it the diameter of the tires mounted on your 18" rims? If the tire diameter is the same as stock then you would have no change in gearing. If your wheels are lighter that is an advantage.

QBranchCars

The webmaster at IS300.net has his SRT HFI/ECU dyno numbers for the IS300 at;

http://www.is300.net/srtintake/dyno.html

You might want to compare results.