Adding weight
#1
Rennlist Member
Thread Starter
Adding weight
I need to add 35-40 lbs to my GT3 to be able to run NASA TT3. I dynoed the car and weighed it with 3/4 tank of fuel. After all of the calculations I wound up at 9.8 lbs per HP putting me in the wrong end of TT2 which is 8-10 lbs. A definite bummer, but I would be possibly competitive in TT2 and the class locally needs some cars to get contingency. Anybody have any good solution to add this weight safely? The car with me and 3/4 tank weighs 3426 and made 356.98 HP @7570 rpm and max torque was 279.48 @5130 rpm. Car has a safety devices half cage (heavy) and GT2 folding seats. Any suggestions appreciated as I really don't want to strip the car as I still use it on the street from time to time. I have to put the side mufflers back on which will get me within 35 lbs. of TT3.
#2
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Bolt weight to the passenger floor.
#4
Rennlist Member
your car is already a fatty :-) mine is under 3300 w/ me in it and near full tank.
Ok, mufflers you got that, you have GT2 seats you could put the pass as a stock seat, iron brakes, heavier bigger battery, full cage bolt weight to the floor.
Do you have a tune? you may be able to work that end, keep HP down while keeping torque up.
Ok, mufflers you got that, you have GT2 seats you could put the pass as a stock seat, iron brakes, heavier bigger battery, full cage bolt weight to the floor.
Do you have a tune? you may be able to work that end, keep HP down while keeping torque up.
#6
Racer
I agree on the full cage and battery.
The hp rating you use, is that manufacturers or do you need to produce a dyno result?
Not that anyone would do this (apart from racing teams etc..) but if you run a restrictor in the intake for the dyno your result will be down on hp too.
you will need to redo the corner weight once you get your magic number whichever way you go.
The hp rating you use, is that manufacturers or do you need to produce a dyno result?
Not that anyone would do this (apart from racing teams etc..) but if you run a restrictor in the intake for the dyno your result will be down on hp too.
you will need to redo the corner weight once you get your magic number whichever way you go.
#7
Rennlist Member
Thread Starter
Already have iron brakes, no tune, dyno verified 357 hp and 279 tq. Already have lead/acid battery, need to check water tank. The half cage was a good 150 lbs or so. When I get back from trip will remove passenger seat and make a weight plate to fit. Front half of cage would probably be too much weight. Anybody know the weight of PCM?
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#8
easiest problem to solve ever....
#12
Rennlist Member
Adding side mufflers would also restrict hp too yes? So helping both ways.