S2000 Under The Hood S2000 Technical and Mechanical discussions.

COMPTECH vs SPEEDCRAFT

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Old Feb 7, 2002 | 04:02 AM
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From: LOSt ANGELeS
Default COMPTECH vs SPEEDCRAFT

supercharge vs turbo?

ok so the supercharger we all know is pretty alrite....probably not the best bang for the buck but you can fix it up even further right? with supercharger how much horses you get? 290 rwhp? something like that....less than 300 i guess...thats with everythign stock though right? with supercharger, you dont have to sell off all you NA tune up parts. so if you had headers, exhaust, cams, sprckts, how much you guys think it would put up? and can you install an intercooler and blow off valve into the kit? aftercooler of some sht like that? will i be able to front mount it ?

and the turbo kit...which i likes....cuz the blow off sound and the spooling sound. i just saw chris' site and his car is in the shop? becuase of the gsket? which is supposed to make it better? this is the problem with turbo....reliability...so far there hasnt been a setup which is really reliable...speedoptions has a turbo s2000 too...working for 400 HP.....so chris...you not gonna use the gasket? for those of us who want this kit, you do nOT recommend it? plus, should you work on internals?, pistons, connecting rods, etc. If this kind of work was done, would i be able to not worry about the kit anymore?, by lowering its comp? and how come we dont get stats from 91 or 92 octane gas, running at low boost, which is more realistic. I wanna know the ratings at different psi's. cuz running lean is no good. Low, just driving adn could still run it HP, and time to race, play with the boost and let her fly HP. how long would my motor last?

basically, for all you techs out there, if i got the kit with the electronics, would getting stronger connecting rods, and lower comp pistons idealistically FINISH the kit? or does that not improve reliability?

I think that if i could get the intercooler and blowoff valve, for the sound, on the supercharger, i would get that.
chris' car in the shop made me sad, hope you got it back, and i dont have the money to have to tow it all the time and get it fixed again.

supercharge or turbo?

once you go turbo you cant go back is why i want turbo..but not if itll die on me....some1 help...need to do something to my car fast!
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Old Feb 7, 2002 | 07:37 AM
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I started nodding off in the middle of your post, im not sure if it was the way it was writen or if I am really damned tired (I am!)

There are numerous threads on this subject, but I will give you the basic run down.

I have given a ride in a car with the Comptech S/C and I have driven my car (obviously) and I can tell you that the turbo setup is a world of difference. The S/C is a pulley driven system and therefore it has a linear amount of boost based on certain RPMs. Some say this is good because it's more predicable. The turbo on the other hand doesn't boost if you aren't 'getting on it'. It get's it's power from the exhaust... The turbo has full boost at 3500 RPM and makes 45 ft/lbs more torque at 3500 and goes from there. The turbo adds alot of low end power that the S/C doesn't give you. The S/C is also less expensive and less complicated.

My car is in the shop because I want to have one of the fastest s2000s in the world, if not THE fastest.. At least for a minute or two.. It is having a complete engine rebuild done. On the other hand, ChrisD has one of the fastest S2000s in the world and he hasn't done any engine mods at all (besides the turbo.) He seems to run run between 8psi and 10psi regularly with a mix of race fuel.

6psi runs fine with 92 octane and is very very fast and very very fun to drive..
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Old Feb 7, 2002 | 09:45 AM
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Whats not reliable about the SpeedCraft kit. Actually, I have heard more problems with Comptech SC's. The gasket wasn't reliable because of design flaws, but had nothing to do with the actual turbo kit. I have had the pleasure of riding in ChrisD's S2000, and there have been "0" problems with it....

I am in no way bashing the Comptech SC kit, but if you want to make a comparison of the two kits, you should have all the facts upfront.
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Old Feb 7, 2002 | 10:07 AM
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What Pappy said. I'm not sure how many ChrisD has on his car since TC'ing it but I had about 10K tc'ed miles on my S with ZERO problems as well.
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Old Feb 7, 2002 | 10:38 AM
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I don't think you can compare 2 turbo kits vs 50+ Comptech kits when it comes to reliability statistics.
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Old Feb 7, 2002 | 10:53 AM
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I agree with Wes except that there have been ongoing problems with the Comptech SC and really haven't been any issues with the turbo aside from having to run race gas which can be fixed by adjusting timing or installing the head gasket. I guess I should probably take some of the blame for what Chris (not ChrisD) is going throught because if I had kept my car then Speedcraft (Dwight) would have finished the turbo 'project' with my car. Since both Chris' are in South Florida they no don't really have access to Speedcraft. Not one bracket has broken, no tranny or diff. issues so I wouldn't base too much on the fact that there are alot more SC's out there than there are Turbos. The price difference is substantial but so is the performance. Hopefully ChrisD will chime in here and let you know any issues he's had with his car since the install and tuning of his VAFC... my guess is that there are none. In addition to which the Comptech SC has been out alot longer... still not long enough that they should have brackets breaking unless they were poorly designed.
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Old Feb 7, 2002 | 11:16 AM
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Originally posted by derryck
...no tranny or diff. issues...
Uhh, what about Speedcraft's original S2000 turbo kit? (before yours)

Originally posted by Speedcraft Crew
derrick's, was not first s2000 we were going turbo there was another one but the customer broke most of the drivetrain and traded the car in on a nsx.
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Old Feb 7, 2002 | 11:54 AM
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I would assume that you're referring to Perry... in which case the closest he got to having a turbo S2 was he actually paid for the turbo... nothing else, just the turbo. While he was waiting to buy everything else he decided to put a ZEX nitrous kit on his car and after repeated high RPM launches (sound familiar Wes) he broke his drivetrain. Mine was the first done... Perry was just thinking about it and they (Speedcraft) had already started looking at the design aspect. Sorry Wes, good try though.
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Old Feb 7, 2002 | 12:22 PM
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I'm new to this and i don't have my S yet, it should be here in about a month....but the first thing i wanted to do was put the comptech SC on...although now after reading about how the turbo kit is way better i'm having second thoughts...i personally would rather have a turbo (primarily for the sounds) but i didn't even know they had a kit until i started reading the posts in this forum....there is only one problem, as you can probably see in my name, i live in C.A.R.B. territory.......what i am wondering is(since i don't know shit about turbos) why is the turbo kit not CARB legal...and is there any way around that, besides driving around with no registration.........so let me know if you guys think of anything or just tell me to deal with the lower performance kit.
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Old Feb 7, 2002 | 12:43 PM
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Having a bad day Derryck??

It's my understanding that CARB legality is very costly, at this point I am going to guess Speedcraft hasn't seen enough return on their time investment to warrant that..

Chris
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