The EVO retains the engine compartment fan. I'm sure that DOG will somehow show that not having the fan is another advantage that TPC has over EVO. LOL.

 

1999P911, I think that might be the issue. The way I understand it so far is that TPC delivers power at a lower RPM range so off the line, the TPC equipped car would initially be quicker. That might suit some people who do not race their cars many times beyond 100 mph. On the other hand, it seems that the EVO unit is best when revved up so it would be best at highway speeds. I guess, it just comes down to how one drives, or at least anticipates driving their cars. I am kind of torn. I like getting out of the hole quicker but on the same hand, I don't want to sacrifice any passing ability at highway speed. Damn tough decision.

 

as i said before, i still need to go out in an EVO. i haven't done that yet. and yes, my decision thus far are based on facts. i've reseached this to death. i've actually been in a TPC car. i spoken with both TPC and EVO on numerous ocaisions. I've had a few offline conversations I'm not gonig to bring up here as well with regards to both products. As I said before, I still need to go out in EVO for myself. i think you're the one that is convinced nothing can be better than the EVO. i'm still open minded here. i'm going to pull the trigger next week on one of these. i understand you've already spent a lot of money and you're obviously very biased. after i go for a ride in an EVO, that should seal it one way or the other.


some companies may be swithing away from the roots style, but the thing you're probably not failing to realize is that they're probalby going to redesign the engine around the characteristics of that blower. we're talking about a porsche, not a new toyota. and not just any porsche, but our 996. i don't about care about other applications. that means nothing to me. all i care about is how whatever blower is going to interact with MY car. not another vehicle, but my car. so bringing up other vehicle applications is pointless.

i'd be interested to hear how you did your data aquisition on the intake temps for both of these cars. especially considering you just posted that you were going for your first spin in a TPC. how did you do all that data testing and you never posted the outcome of your ride. who's car were you in?

one other thing about temps... TPC sells the front mount radiator as an option. so yes, if you live a cooler environment it may not be necessary. however, when you did your measurements, did the car have the 3rd radiator. that makes a huge difference and certainly helps with EVO's intake temps.

i don't understand what you mean about the power flatlining at 5500 rmps? if you asking if I want my porsche to drive a like a V8 vs waiting for the car to spool up, yes i would prefer the instant power.

if the roots is good for 100K and carries some sort of warranty, the way i see it is it must work fine the way it is,and it's one less thing i have to worry about. the company must be very confident to label it as 100K maintenance free.


how is the TPC "less performing"? it builds more HP and boost at lower RPM while you're still waiting for yours to spool up. i'm not knocking the EVO, just look at the dynos. If I stand on it in 2nd gear at 3K rpm, and your in the same gear / RPM, the TPC should walk away from your car. haven't raced them, but that's what the dyno says. the roots boost like a blower and the cetrif boosts like a turbo, building HP as engine rpm increases. as i said before, one isn't necessarily better than the other. just personal preference on how you want the car to drive.

not to mention you'll be too busy worrying about shortshifting so you don't crash the rev limiter as you building max power in first and second all kidding aside, that does seem to be an issue with the evo.

you can post all the negatives about TPC you like, but look at the dynos. it still works just fine. i was in one last week. it was probably about 90 plus degrees out. ran like a champ. we went out for probably a half hour of beating on it.

who did you race in the 996 and the 993. there aren't many TPC its there, so we should have no problem tracking him down and hearing his version of the race

also, haven't done some "special" mods to yours that you won't disclose that make a lot more HP than stock kit?

listen, on paper, the TPC seems like a better setup. but we all know what paper is worth (great for wiping your butt ). i've been in a TPC, i'll try and get out in the EVO this week. i'll be honest, i like the power deliver in the TPC. however, a ride in an evo may change my mind. which ever one seems to work better, they get my money.

 

The power difference it not based on vehicle speed, but on engine speed. That means the EVO pulls stronger and quicker at higher engine speeds in ALL gears, whether you are driving 30 MPH in first gear or 80 MPH in third gear. At redline, you shift in a 996 drops you to a sweet rpm level on the EVO system that maximizes power. On the TOC, you shift into just slightly below the flat line. of the power band. I guess if you want to experience quickness from 2000 - 5500 rpm and then coast up to redline, the TPC would be good. The last 1500 rpm on the TPC unit is really a waste as far as acceleration goes.

 

karlooz, yes the 3rd radiator option uses a pump to circ the coolant through the system. i believe it's included with the radiator upgrade kit (lines, etc...)

TPC tried using upgraded injectors. They didn't like it. They found it to run smoother with the 7th injector. Obviously, if it worked better, why not use the new injectors. Not like that have to design them. You just buy /install them. Like I said, with their kit they found the 7th injector to work better than replacing the stock injectors. I'm not a tech guy, so I can' tell you why. Maybe evo works better with new injectors. I don't know. Again, there's no reason not to use the upgraded injectors other than they just don't like it with the TPC kit. if they're not seeing fuel management issues, then who cares?

With regards to the fan being uninstalled. That is correct. There is no room for it.. That could potentially be a problem....if you tend to idle your car for an hour at a time in summer heat Seriously the car I was in was from south FL. doesn't get much hotter than that. he said he has no problems. with the caveat that he said it would heat up if you let it idle for extended periods of time (an hour plus) in extreme heat. he said it's not an issue at all for normal everyday driving.

 

so isn't this your car (got it from rennlist)? where's the fan? did you put it back in? it would be great if the fan was retained.

 

i guess the evo kit is great if you like to drive betwen 5500-7200 rpm then if i'm understanding you right?

 

by the way, from the dyno chart i got from tpc, their powe doesn't start to drop till about 6600ish rpm, which is about where i usually start to think about shifting in lower gears anyway to avoid hitting the rev limiter.

i really don't see how the evo has any power advantage over the tpc other than right smack at the top of the rev range.

 

There would be NO comparison, the TPC SC'ed 996 would blow the doors off any EVO SC'ed 996. Simple fact, look at the dyno curves of the two...I've seen TPC 3.6L dyno charts showing as much as 430RWHP with (more importantly) as much as 390RWT***. That's nearly 100lb-ft of torque more than the EVO kit with similar if not more peak HP to boot** It ain't rocket science here, lol. One pulls like a big inch V8 or has "turbo-like" torque...the other you need to rev the hell of it to get the power down. A lot of people here forget (or blatantly don't understand) that "area under the curve" is AS responsible for acceleration as HP figures are....the TPC kit has very impressive numbers for BOTH not just one. That TPC SC'ed 996 should be faster than an X50 TT with ease and give a GT2 TT a run for the money (i'm referring to the GT2 with the HP bump too, 482HP). The EVO kit will barely outpull a stock TT looking at its charts and from what OWNERS of that kit have told me personally*** (right before they had it removed ) Ultimately let's look at why we what to SPEND nearly $13,000 on a MOD (after install)...MAXIMUM power & acceleration you can safely get out of a 996 N/A....IMO its a no-brainer with the TPC kit. And if it hurts the engine down the road, it'll just give an excuse to rebuild its motor with a better bottom-end for boost where I'll just turn up the wick even more (which should be really easy to do on the kit being how straighforward and easy tuning a SS-box is) A professionally redone program and maps would be needed with entirely new parameters if you attempt to hop-up the EVO kit's fuel system...programming engineer needed $$$.

 

...but the peak HP of the TPC is still higher than the EVO evn thought the TPC HP curve starts to mellow (not flatline)

 

like i said a few weeks ago, do you sell these units ? you sound like a marketing blurb

 

1999: i know you read my post as you've already responded a couple time. how abou the names of the TPC people your raced. i'd really like to hear their input.....

 

so i made the plunge and got the EVO kit (not installed yet). various factors but the main one is that i wanted a system that was less taxing on my engine and its 76K miles (i think i'm gambling anyway at this point ) and the drivetrain.

 

i think you'll really like it carlos. more power is better either way besides you got a pretty good deal.

 

Yup, that's my car. Sent it to Todd with the GT3 wing and lid on it without componants. I have both the stock lid as well as the GT3. When I swap lids, I swap the fan.