Am I right in thinking:

Comptec no AC is about 60-80 hp
Comptech with AC is about 80-90
Vortech is 100 ish?

 

This has been documented to death, go look at the stickies.

 

The AC does not add power. The AC keeps the power you lose from increased intake temperatures to a minimum at the expense of about -.5 psi of boost. Yes, after some hard running on a hot day a CT/AC car will feel stronger compared to just a CT car running the same amount of boost. However, on a single pull and a cool day it's entirely possible a non-aftercooled car would beat out an aftercooled car due to the loss in boost.

 

Not really, There are conflicting reports all over the forums. If you go to the stickies on the first page is a post saying that the Comptech with ac will produce 340 at the rear wheels!!!

I realise that there is lots of info all over the forums however, I was hoping for someone to clarify wether or not my interpretation of the many wildly differing claims was approximately correct.

I know different dyno's different days = different results but I was hoping that one of the old timers on the site would help by suggesting what they think approximate average rear wheel power increaces are. I am not being lazy and I have read an awful lot so pointing me at sticky threads that were started before comptech released an AC is not very helpful!

 

So what your saying is you asked a question that is AGAIN going to give you widely different results based on different dyno's and individual experiences? You're just going to get the same results as the stickies, as different individuals will give different answers. Everyone has their favorite,

No two cars will give the same result, actually the same car can give a different result hour by hour, day by day.

The only reason to buy the aftercooled version of the CT is if you plan to run a smaller pulley than the kit comes with, or you live in an area where is gets extremely hot and stays that way.

 

So I take it that you have comptech without AC?

That is what I am thinking of as i live in the UK and it is relatively cool. What has put me off is that one post reckoned that it only gave 60BHP and that the AC one was 80ish...

If you don't mind me asking (I know my results will be different!) increace are you seeing at the wheels (assuming you are stock other than the final drive)?

 

This is a ridiculus statement. Aftercooling helps with detonation, intake temperature, and is superior to a non-AC setup, period. This is why the Vortech unit comes aftercooled ONLY. The only reason not to get an aftercooler is if you're on a budget and plan on doing it later.

 

My intake temps are quite good without the AC, I've NEVER had any detonation issues, I have no desire to bump up the boost, and the AC is only superior when you go above the stock boost or pulling several hard runs continuously (sp?).

The only reason vortech put in a AC was to make it different than the comptech kit and because it ran at 7psi vs comptechs 5psi. Comptech ran their kit for a LONG time before adding an AC, which they only did to match Vortech for marketing reasons. People like you made an assumption that the AC made it better, so comptech added it to make you happy.

The only good reason to buy the AC is so you can add more boost. With the comptech unit, as long as your fuel ratio is correct and your spark plugs aren't junk your fine. And if your fuel ratio is messed up, the AC isn't going to help you.

But nice chatting with you though.

 

stitos2k

Before we descend into a flame fest can you confirm what increace in rwhp is?

Thanks

Alex

 

Hopefully it wasnt me that confused you

To clarify, the A/C will give you increased BHP when ambient temps are above the limit that it can cool.

For example, say it was cold outside, the A/C wouldn't be very efficient becuase it cant cool any more than the ambient is already. As also mentioned, the cooler itself causes a pressure drop (due to restriction) of 0.5 psi so that will lose you some power.

When its hot outside, the A/C can do its job and thats where you will gain power becuse the A/C is dropping inlet temps - andcooler air yields more combustable power.

What I dont know is what temperature rise over ambient, the S/C gives at a stock boost. Compressing air makes it warm up basically. I will go work it out.

I would say that for the UK, A/C is not needed. If you weight up the cost and extra hassle of fitting....

The different power quotes from Vortech / Comptech are for a few reasons. Comptech uses a larger stock pulley so it produces less boost than the Vortech (V is 7psi) Also, the Vortech management is a bit more complex in that it adjusts timing so it will be a bit better tuned out the box.

So to sum up, the Vortech is more power,a fair bit more but you need to ask what your goal is. For me, given our ambients, and the fact I dont want to stress the car to death, I would lean towards the Comptech non A/C. Its simpler to fit in terms of the oil pan too.

But there is 2 for sale in the UK at the mo, and that saves a LOT of money.

http://www.comptechusa.com/store/media/dyn...upercharger.pdf

MB