Lightweight Mods

[sinistaGTR]

lol love all the light weight diy stuff lol...another thing to go faster...more power

[shanef]

yeh stuff the weight, just bang in heaps more power!!!

[r33_racer]

yeh...cause loads of power helps get you around corners and stop quicker too. lol you know whats faster then a heavy car with lots of power....yep you guessed it a lightweight car with lots of power!

[Waldo]

if you want 1kg less weight change your r32 power steering pump to an r31 pump they are 1kg less...but are about $90 secondhand lol

[Beer Baron]

Wow Beer Baron,

Your certainly the hypcrit arent you now. For someone who came on and blasted me about not providing helpful advice without attitude you certainly have not fallen far from your own tree!

Give the dude a brake.

And as far as your comment goes about 'unsprung weight' id be more worried about the increased rotational inertia and how this is seen at the engine, given the gearbox reduction. You of all people should know (given your large and knowledgable head) that rotation inertia, for a given cross sectional area and material density, increases by the square of the radius. All of course assuming the c.g location (of the wheel) moves radially outward.

So i say to him, admire his work, its his, hes putting in the effort, while you can talk crap and blow sunshine up your own arse.

Andrew, I have a tip for you. If you are going to try and abuse me use the spell check first. Using big words like "brake" and "hypcrit" just further your image for you. I have no idea when I "blasted" you. To be honest I have no idea who you are and can't even remember bumping into you on the forum before. Cleary it had an impact on you though.

Anyway, anyone who thinks using 18X7.5 inch rims is a performance upgrade is not thinking straight. For a quarter the price you could buy a set of 32 GTR 16X8 inch rims which I would say weigh about the same as your 18inch nismos. The difference in weight between say a 235/16 and a 235/18 is enough to offset any weight gain/loss. 16inch tyres will be much cheaper. spending some money on decent tyres will give you much better lap times, and handling benefit. So $800 on 32 GTR wheels, and $1600 on some good tyres = $2400. or $2400 on 18inch nismo and $600 on cheap tyres = $3000 to go slower.

As for GTR seats being lighter than GTST ones I could be wrong. I do own both a GTR and GTST, and fitted 32 GTR seats to the GTST. When I did, I actually thought the GTR seats felt a little heavier, but I didn't weigh them as I wasn't changing them for weight reduction, just look and feel. Either way it won't be a big saving as the GTR seats are still bloody heavy. Even a cheap no-name bucket seat would give a big advantage in both weight, and driving comfort.

260GTS: No need to be a smartarse anyway, I was actually trying to offer some advice to save you some pain. You have a thread called lightweight mods. I suggested some. If you want to keep your sunroof then go ahead. I dont have a problem with trying to lighten a car, but I just dont think a sunroof GTST with narrow 18inch wheels is the best option to start from. I never suggested you buy a GTR, or even mentioned my GTR. but you seem to have a hang up about it? To be honest I think the main drawback of a GTR is the weight. Being as heavy as they are is punishing on brakes and tyres which makes racing them very expensive. That was part of the reason I bought my GTST. To have some track fun in a lighter car that I if I messed up and wrote off I could still get all my capital back just from wrecking it out. But it turns out I have more fun in the GTR on track, so the GTST ended up staying as a road car.

My last piece of advice is start weighing things. You are possibly chasing your tail by just changing things based on a hunch and without quantifying the results. It would be handy for you to know if the GTR seats really were lighter than GTST ones. or if an 18X7.5inch nismo and tyre really is lighter than a 16X8 inch GTR wheel and tyre.

[Beer Baron]

also, just be a aware some classes of racing will not allow you to race with a sunroof at all. some will allow it, but you must need a window net fitted. this of course is to protect you in case of a roll over. most amateur forms of motorsport (like open track days, khana, skid pan days, drift days etc) will be fine with it though.

[Roy]

I say take the easy stuff out like boot lining, rear seats and trim etc and if you can put in a light weight drivers seat. You probably remove about 20kgs all up, just enough to counter the bigger intercooler, oil cooler and bigger brakes you need. So you lose some easy weight that you can easily put back in the car shoudl you want to sell it.

R32 GTR wheels are forged, and if i was a gambling man i would say thye are lighter then my Nismo LMGT4 17x 8.5s. At least they are the saem weight, so by the time you throw rubber on them they will be heavier. STD GTR wheels are pretty good things.

Im still wanting to hear from someone that has stripped out a GTSt to see what weight you can get them down to. Is there really that much difference between a stripped S13 and R32 GTST, save the alloy vs cast iron engine of course?

[Beer Baron]

yeah I dont know why people doubt the stock GTR wheels are a good thing. 32, 33, and 34 GTR wheels are all made by BBS. one of the most well regarded wheel manufacturers in the world for high quality forged wheels. They are a good size too being quite wide for their diamter.

[Gts-t]

BB

I come on here talking about how to get to 1300kgs or slightly under etc. At no point did i say i want a lightweight racing car so suggesting i should sell my car is pretty rude.

As for running r32 gtr rims, well we dont all want to look as poverty stricken as you and so go for a nice set of lightweight 18s. If u think the extra 1.3 cms the rims have is worth calling mine narrow then u truly are stupid. I run 225/40 S-03 $400 tyres so im sure i have more grip there than whatever cheap tyres you run on your 16x8s.

And as far as track days go a set of r33 gtr rims being 9 inches wide might be worth trying. However for the street they will stick out the sides, as all gtr rims are the wrong offset for the lesser models.

In no way do i want a gtr, i mean firstly they dont come with sunroofs More seriously though im not attracted to a 1500+ kg car, with terrible weight balance, all being moved around by only 2.6ltrs.

It is my aim to create a rwd 1300kg car, without and extra 150kgs over the front wheels, with a 500hp 26/30 single turbo motor.

Also fwiw, if i have 20% less weight than a gtr i would need 20% less grip.

So a gtr running on 9inch rims would be similar to a gtst running 7.2s at 7.5 i think im safe

However i will concede i am looking into some nismo 18x9s with gtr offset for when i finish the 26/30.

Edited January 2, 2007 by 2630GTS

[Gts-t]

I say take the easy stuff out like boot lining, rear seats and trim etc and if you can put in a light weight drivers seat. You probably remove about 20kgs all up, just enough to counter the bigger intercooler, oil cooler and bigger brakes you need. So you lose some easy weight that you can easily put back in the car shoudl you want to sell it.

R32 GTR wheels are forged, and if i was a gambling man i would say thye are lighter then my Nismo LMGT4 17x 8.5s. At least they are the saem weight, so by the time you throw rubber on them they will be heavier. STD GTR wheels are pretty good things.

Im still wanting to hear from someone that has stripped out a GTSt to see what weight you can get them down to. Is there really that much difference between a stripped S13 and R32 GTST, save the alloy vs cast iron engine of course?

Hey Roy,

im sure u know this but the nismos are forged too. Also do tyres get heavier as the profile decreases or something. Like is a 18inch tyre heavier than a 16inch? i would have thought the 16 inch tyre to wiegh more.

When i fitted my rims the rim was 7.4 and the tyre 12kg

And yeah the same as you id like to get down the the weight of atleast stock silvias (any model) or as close as i can go without going crazy.

[Roy]

Also fwiw, if i have 20% less weight than a gtr i would need 20% less grip.

I know what you are saying...but you never need less griup, maybe able to make do

Yeh LMs are forged, but they are physically bigger, so weigh a smidgen more. As for tyres, oops. I should point out it was speculation on my part as i have never weiged any. But i have carried way too many and the larger diam tyres always seem to weigh more.

I got some new scales for xmas so i may go crazy weighing the sh1t i have around the house including the 17 x 8.5" LMs for the front of my car.

This is an interesting thread, hope it doesnt turn into a shit fight.

[Beer Baron]

Save your bs beer baron.

I come on here talking about how to get to 1300kgs or slightly under etc. At no point did i say i want a lightweight racing car so suggesting i should sell my car is pretty rude.

As for running r32 gtr rims, well we dont all want to look as poverty stricken as you and so go for a nice set of lightweight 18s. If u think the extra 1.3 cms the rims have is worth calling mine narrow then u truly are stupid. I run 225/40 S-03 $400 tyres so im sure i have more grip there than whatever crap tyres you run.

And as far as track days go a set of r33 gtr rims being 9 inches wide might be worth trying. However for the street they will stick out the sides, as all gtr rims are the wrong offset for the lesser models.

In no way do i want a gtr, i mean firstly they dont come with sunroofs More seriously though im not attracted to a 1500+ kg car, with terrible weight balance, all being moved around by only 2.6ltrs.

It is my aim to create a rwd 1300kg car, without and extra 150kgs over the front wheels, with a 500hp 26/30 single turbo motor.

Also fwiw, if i have 20% less weight than a gtr i would need 20% less grip.

So a gtr running on 9inch rims would be similar to a gtst running 7.2s at 7.5 i think im safe

However i will concede i am looking into some nismo 18x9s with gtr offset for when i finish the 26/30.

I give up mate. I didn't mean to insult you, but clearly did by accident. you on the other hand are trying very hard to insult me but are failing miserably. as for me looking poverty stricken for owning 32 GTR wheels. I dont even know where to begin on that. I'm certainly not the richest guy in aus, but I'm pretty comfortable with my finances... Also I don't even have any R32 GTR wheels? But I have owned them in the past, and would happily use them again in the future. perhaps you should look into BBS. Just to help you out again, R33 GTR wheels do not stick out the sides. I run a set of Blitz forrged rims, 17X9 +30 on my GTST and they are fine. My friend runs a set of R33 GTR wheels also 17X9 +30 on his GTST too. Both run street/track/whatever no problems at all.

I'll try an ignore all your crap about GTRs. Obviously having never owned one makes it easy to shit down on them from a great height. I don't really need to defend them. Like I said, I currently own both a 32 GTST (with a sunroof no less) and a 32 GTR and I'm under no illusion which is the nicer, faster car...

best of luck with your 500hp, 1300kg GTST. I'm sure it will be very quick when (if?) it's going.

ps: mate, for a rwd 500hp car by anyones definition 225s on a 7.5inch rim is very narrow wheel/tyre package. oh and I'm not so sure about your 225 S-03s having more grip than my 255 Advan A048s. lol crap tyres indeed.

[mad082]

a 500hp gtr is going to pull a lot better out of a corner than a 500hp gts-t. to get the same grip you would need about 400 wide rear tyres.

a gtr may have 150kgs more, but they have much more power than the quoted 206kw.

if i was you i'd scrap the $400 tyres you are currently using and go to 235's on the front and at least 235's on the rear. by going to 235's all round you will have better traction and drive out of corners, so that will drop your lap times.

also by running either 16 or 17" rims you have more sidewall in the tyre (compared to the 18's you are looking at). this means that on a rougher track you will get more shock absorbed by the tyre, resulting in a smoother ride and more traction. with a bigger rim and less sidewall your tyres will be more likely to hit the bumps and bounce, resulting in less grip.

[shanef]

how the fark are you to going to get any traction with 500hp and only 225 wide tyres in a rwd car

i had enough trouble in my rwd 270hp car with 265's!

[mad082]

how the fark are you to going to get any traction with 500hp and only 225 wide tyres in a rwd car

i had enough trouble in my rwd 270hp car with 265's!

you should try over 280hp on old, hard 205's. first gear is useless (unless you want to create smoke) at anything over about 60% throttle

[Roy]

Ok, back on thread....17x8.5 LM GT4s are 7.5kgs.

The 235/40/17 tyre i just weighed (brand new) is 10.5kgs.

For what its worth, with 17 x 8.5" rims with 235/40/17 RE55s you dont have any problems with traction with 360rwhp. Thats with nothng special suspension and std diff. When the std diff opens up its chaos and there is traction issues in 3rd gear getting out of corners...but then the next session when the diff oil has cooled its all good and traction is fine.

500hp??? I wouldnt think it will be that bad with 255/40/17s. Really depends a lot on how its been tuned and the power delivery.

A bigger concern is if you make the thing too light then the 500hp would be even more of a handful in a lighter car. If you get then car down to around 1260 with driver and fluids then im hoping 420rwhp ill do the job. (my new engine and bits that im putting on it)

[tom9999]

where can you get a good set of light wheels from 17x8

[tom9999]

where can you get a good set of light wheels from 17x8

[Gts-t]

I give up mate. I didn't mean to insult you, but clearly did by accident. you on the other hand are trying very hard to insult me but are failing miserably. as for me looking poverty stricken for owning 32 GTR wheels. I dont even know where to begin on that. I'm certainly not the richest guy in aus, but I'm pretty comfortable with my finances... Also I don't even have any R32 GTR wheels? But I have owned them in the past, and would happily use them again in the future. perhaps you should look into BBS. Just to help you out again, R33 GTR wheels do not stick out the sides. I run a set of Blitz forrged rims, 17X9 +30 on my GTST and they are fine. My friend runs a set of R33 GTR wheels also 17X9 +30 on his GTST too. Both run street/track/whatever no problems at all.

I'll try an ignore all your crap about GTRs. Obviously having never owned one makes it easy to shit down on them from a great height. I don't really need to defend them. Like I said, I currently own both a 32 GTST (with a sunroof no less) and a 32 GTR and I'm under no illusion which is the nicer, faster car...

best of luck with your 500hp, 1300kg GTST. I'm sure it will be very quick when (if?) it's going.

ps: mate, for a rwd 500hp car by anyones definition 225s on a 7.5inch rim is very narrow wheel/tyre package. oh and I'm not so sure about your 225 S-03s having more grip than my 255 Advan A048s. lol crap tyres indeed.

Your a good man beer baron, i apologise for acting like a wanker. I thought u were pretty decent member untill i read your inital post obviously i took it the wrong way indeed.

I rate the gtr very highly and in anything but the dry i think the 4wd will dominate Rwd every time. You would be correct when i say i have never owned or even been for a ride in one (unless a 260RS counts) However i think in the dry, a RWD RB26/30 500hp 1300 kg GTST with could be right along side if not faster than 500hp gtr (2.6-3.1 whatever).

Obviously im going to need some 9 inch wide rims and some rubber as good as yours advans i was thinking re555s would be ok. I will be staying 18inch, how much worse than 17inch do u think that will be?

I must say though at the moment with 213rwks from the RB20, the 18x7.5s with S-03 rubber is holding the power very well and handling very well. Also like i said i will go to the weigh bridge soon and get back to this thread, im still interested in u telling me what u think it would weigh now.

[markimak]

BB

In no way do i want a gtr, i mean firstly they dont come with sunroofs More seriously though im not attracted to a 1500+ kg car, with terrible weight balance, all being moved around by only 2.6ltrs.

It is my aim to create a rwd 1300kg car, without and extra 150kgs over the front wheels, with a 500hp 26/30 single turbo motor.

Also fwiw, if i have 20% less weight than a gtr i would need 20% less grip.

So a gtr running on 9inch rims would be similar to a gtst running 7.2s at 7.5 i think im safe

However i will concede i am looking into some nismo 18x9s with gtr offset for when i finish the 26/30.

hmm.. funny this..? BNR32 weigh 1460 and i bet tomorrows breakfast a mildly 500hp tuned R32 GTR with full trim will slaughter any 500hp GTST with or without trim removable. R33 R32 and R34.

also the R32 GTR rims are a very nice brilliantly made rim. will be far lighter and stronger than most aftermarket rims. designed for a Group A racing beast. dont doubt a GTR. and the way u sAfrican American at 2.6L... 600cc more than a R32 GTST.? nearly double the power and torque.

have u even driven a GTR? keep in mind the R32 GTST RB20 is a shitblock in design and power compared to the GTR. the head aswell is inferior,. GTR head is another piece of work. and i fail to see how 500hp and 1300kg on 225 will have any sort of traction. my GTR with the old yokohamas 245 spun up to 3rd in rwd and spins 1st and mine is mildy tuned. im now running 225 goodyear and they are no good. is it cause of the extra 600cc?

please the GTRs AETS has prob more development funds pumped through it than the whole GTST car.

cant wait to see u head around QR pulling off ur 60secs and have a BNR32 pull off 55secs.

GTST are far inferior than a GTR will be around a track. nissan designed it that way.

Edited January 2, 2007 by markimak