Turbo or Prorcharger on Very Light M6 Car
03-07-2008, 08:45 AM
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Turbo or Prorcharger on Very Light M6 Car I am doing a LSX 240sx build. The car weighs about 27-2800 pounds and is a 6 speed. I have a choice of either 4.08 or 3.57(ish) gears. I want to do forced induction for sure. My goals are 600whp for now with room to grow a little in the future. The car will have 315/35/17 M/T ET Street radials. I don't know wether to go single turbo or procharger. I am leaning toward turbocharging it but have a concern. I don't think I will be able to put the sudden surge of power to the ground with a turbo. And having said that, would the car be faster in a 1/4 with a turbo and the associated lag and then sudden surge of power(even with 3.57 gears). Price would be about the same for both, and I have someone to do the custom "plumbing". I just want to hear some opinions. Thanks.
03-07-2008, 10:22 AM
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Don't think a light car like that needs 4.10 gears. 3.5 is likely better and spool turbo up better. Super guys usually like 3.73 gears but again in heavier cars.Centrifical can help you hook up as it builds boost with rpm. But you can buy boost controllers to help with the turbos and way the boost hits as well. If you stick to smaller turbos you will have less lag. To build boost in a manual off the line you will need a two step. Lingenfelter sells one now.
03-07-2008, 10:29 AM
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If I go procharger I want to run 4.10's for sure. Thats what I have in my LS1 RX-7 and it works so well. I know you can slow down the spool with the boost controller to an extent, but will it be enough. I also know about the two step, but don't think it will hook on the street. I just don't want another roll car like my RX-7, traction in 1st and most of 2nd is just non-existant, and I think that that is how it will be with the turbo.
03-07-2008, 10:41 AM
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u dont get a sudden hit in power with turbos, u build it. if u want to hook the best go with a turbo set up with a higher gear(3.42s-3.57) depending on what size turbo u go with is going to depend a lot on how much lag ie traction u get. superchargers are going to build a lot more power right off the line than a turbo would.
03-07-2008, 11:22 AM
#5
Not likely to be hooking anything with power past 600rwhp very easily in a light little car like that. I have my eagle talons and they are all wheel drive and can smoke the tires off them with plus 500 hp. Now if you want to drive around on et street radials that will help a lot. But of course they are not great for high speed or much else except pure drag racing.I run the nittos drag radials on my 96z28 and 99ta. I don't expect them to hook that wonderfully in my new twin turbo 408 build. I expect will have to run et street radials if want to seriously hook at all.
There is obviously limits to how much power and traction you can have. And with the boost controllers you can set how much boost you make in different gears and how the boost ramps up and stuff. not just how fast it spools up. If you want slower spool you can go real big turbo.
Also not sure how big a tire you can get under your little cars. If you tub them out or something maybe. Bigger wider tires help too. If I already had a super car would do a turbo car just for something different. I may do a supercharger at some point on my 96z28 as already have bunch of turbo cars in my stable. I like all the power adders,they are all fun in their own way.
So if you really want to put a lot of power down on the street then start building awd turbo cars.Rear wheel and front wheel have their limits..fwd is pretty much the worst for big power on the street.
There is obviously limits to how much power and traction you can have. And with the boost controllers you can set how much boost you make in different gears and how the boost ramps up and stuff. not just how fast it spools up. If you want slower spool you can go real big turbo.
Also not sure how big a tire you can get under your little cars. If you tub them out or something maybe. Bigger wider tires help too. If I already had a super car would do a turbo car just for something different. I may do a supercharger at some point on my 96z28 as already have bunch of turbo cars in my stable. I like all the power adders,they are all fun in their own way.
So if you really want to put a lot of power down on the street then start building awd turbo cars.Rear wheel and front wheel have their limits..fwd is pretty much the worst for big power on the street.
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03-09-2008, 07:50 AM
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03-09-2008, 09:40 AM
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to back. People just need to learn how to modify cars apparently.
I would personally go with a Procharger.
03-09-2008, 09:50 AM
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Before this turns into a Cobra thread, back on point. My goals for the car are mid 10's at high 130's or higher. It is primarily a street car. I may take it out on open track days and it will get autocrossed. So a linear power band would be nice to use. Anyone have experience on both(turbo/supercharger) setups on similar cars? I am used to the feel of my na ls1 rx-7 with 4.11's. Power is very smooth and responsive I like that a lot.
03-09-2008, 10:19 AM
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Mid 10s??? 600 hp in that sort of car is 9s id imagine, if you can plant it. I'd go the turbo route with a controller or some sort, it will keep you from blowing the tires off until you have some speed. These aren't 2L remember, they can spool a turbo to make 600 hp pretty quick, faster than your tires can handle. I think the turbo route would do quite well.
03-09-2008, 11:28 AM
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Since one is on your moderating staff 
, see above ^^^^^
For that light of a car I'm willing to bet upper 400 to 500hp is all it's going to take. Any power adder is going to get you there without much problem.
How much complexity are you willing to deal with? Are you even going to be able to get it to the floor? I would be more worried about that.
, see above ^^^^^ For that light of a car I'm willing to bet upper 400 to 500hp is all it's going to take. Any power adder is going to get you there without much problem.
How much complexity are you willing to deal with? Are you even going to be able to get it to the floor? I would be more worried about that.
03-09-2008, 04:48 PM
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That is why I am worried about it so much. Procharger is nice and linear, I think that would be easier to handle, but ultimately slower. I am not going for all out power and speed so I don't need stupid power, just enough to not feel slow anymore(that is how my RX-7 feels now). 500 would get me to my et goal, but traction will be the limiting factor. I want more top end and trap speed than et's. Procharger would be simpler, but I am not worried about the complexiety of a Turbo. It is just hard to hold back and not go all out with power and end up with a highway roll car, I don't want that. I am hearing a lot of turbo sugestions, and more procharger guys have an opinion?