Well i know a turbo car would be no good for track racing(not drag) cause of the lag, and i was wondering if a supercharger would be reliable for track use...

i don't want to be rebuilding it every race or anything, i know they are pretty reliable for daily driving use, but say i wanted to beat the **** out of it every once in a while, will it hold up?

And keep in mind i still plan on building both the head and bottom end strong to match the combo i'm choosing!

Still haven't decided on going turbo and just having a really fast car or building it more for track use, all motor or w/a supercharger if the reliability is not bad!

 

Superchargers are good because you have constant power at the tap of the gas pedal---and a built motor with the blower will yield bigger gains As far as reliability, they are probably more reliable than turbocharging--I know Jackson Racing has a 100,000 mile warranty on their SC kits. Hope that helps...

 

Turbo can still be good for drag. Itll lag low rpm, but yield tremendous gains at high rpm. Is this a reasonable trade off, i think so. The reliability of supercharger is better tho.


[Modified by mountster27, 7:19 PM 9/18/2002]

 

if you are not dragging it and you want to run it on the track turbo lag wouldnt be a problem because most of the time you will be in higher RPMS, but running like that for a long time can really crank some heat with a turbo but if you take the proper precautions i dont see a big problem..
one thing i been thinking about and it may be OT but how much HP does a supercharger take to make HP, because your engine has to turn the pulley so there is friction.. anyone know?

 

the jrsc has been far from reliable for most of it's owners. people are happy of course, but some are not. motors blowing rings/ringlands quickly, etc.

turbo can be a great option for a track car.

however, before you decide this you should really consult some of the scca rules, etc. if you just want to do lapping days, then it's okay. but if you really want to compete competitively rules are enforced and what mods are allowed.

 

When built correctly turbos and superchargers are great for track use. If you have the correct turbo for your car you make power from 3000 RPM on up. If you're dropping below 3000 RPM on most tracks you're doing something severely wrong.

But as such, I would never run a stock JRSC or any stock turbo kit at the track. Every single one of these kits has some el-cheapo (sort of, these kits cost a lot) fuel management system to them. Before running it at high RPM's for 20-30 minutes I would upgrade that fuel system with a larger fuel pump, larger injectors, and throwing out all the band aids that these "systems" come with. The only way that you'll get though is either a PMU or a EMS.

 

thanks for the replies guys! seems like turbo is the way to go, since it seems like the supercharger is not as reliable as i thought they were,

and timeracer, or anyone, so, u think i should build it piece by piece myself, if i want to use it for track for reliability purposes...will check out the scca rules, not %100 sure if i'm gonna race competitively yet! we'll see how i do in some test runs!

i was planning on going with a stand alone and upgrad my fuel system, well everything, as well as build my block and head really good, but does it matter how big my turbo is for the track since i won't be worring about lag if i'm gonna be in the high rpm's all the time, or should i stick with a smaller one, and will a smaller one be more reliable?? sorry for all the questions!

 

You're going to find that going with huge turbos are not worth it for race track applications. I can't see how you would ever need more than 300 to the wheel horsepower on a track. Since if you go much higher than that, your spike or even the increase in torque will make the car very hard to control. If you're going to go all the way go turbo. Due to the fact that you can intercool is point enough.

If you really know your way around turbos and have the resources to custom build everything then go for it. But if you're only gaining an understanding now I'd say start off with either the Drag, FMax or GReddy kits and use those as a building block. Though get it direct so you can throw out a lot of bandaids that each of them have since you're going to run a built engine with a stand alone. Also, know that in stock form, most of these turbos are designed to make best power at around 15 psi. So if you build your block, try to make sure (unless you want to re-trim the turbo) you can hold at least 18 psi on it.

~Doug

 

Wouldn't the JRSC have some heatsoak issues as well on lengthy track runs?

 

Thanks doug, you've pretty solved my problem of going all motor or going FI, i was just never really sure if a aftermarket turbo was good for the track or not! I tried to get that answered before and didn't really get any replies, but i guess if i build it right, it will still be reliable to a certain point!

I don't plan on going more than 300 whp, i was just wondering the limits on the size of turbo suitable for the track!

If you don't mind, got one more question, besides the fuel management system that comes stock with the kit, what other crappy bandaids will come with it??

 

Depending on what your power goals may be you may want to get a new exhaust manifold, wastegate, and some other breathing items. Of course you'll want to use new injectors, new fuel pump, to compliment the fuel system. I'm not really an expert in turbo's you may want to ask this question in the turbo forum here. If you're running 8+ psi you'll probably have to upgrade the igntion system as well. It'll be a lot of work, but the car will be a lot of fun after!

 

thanks for your replies!

 

I would keep it NA! If you got a blower on your car, good luck slowing it down! Lots of brake ducts, and very good pads.. My car easily hits 130+ at most tracks with only 185 HP..

 

interesting, so are u saying there is no way to upgrade my braking system and suspension to accomadate the boost, even if it's set on low boost for the track?? There's gotta be a way!

 

That's not what corey is saying. What Corey is saying is that he already hits speeds of 130+, why do you want to go faster? For most people achieving that kind of speed on the track is fast enough. Braking can be cured numerous ways, probably the best budget upgrade would be the baer track system.

 

This is Corey again

Timeracer is right, isn't 130mph in a factory car with no safety devices other than seatbelt/airbag fast enough? Hell, 130 is pretty damn scary in a fully preped racecar, because, if your brakes don't stop your car for Turn 1, what will? A tree/wall/graveltrap/another car.......

 

Well i don't think that's really scary....scary is 250km/h on a little crotch rocket(GSX-R)...but very fun! I live in canada, so i don't know what that is exactly in mph....but that speed with no seatbelt, airbag, or anything except your hands and your butt, is scary!

I want to go faster than 130mph, i just have that craving!