Turbo 3.2 Proyect Part 2 Dyno Results

As we all know i turbocharge my 3.2,and i had it Dyno and the results are;
at 5500 RPM @ 276 HP at the wheels
we pick up 100 Horsepower with the system
I have put 700 miles on it and no problems at all yet.Im looking for 50 more HP any ideas ?
Regards Juan
www.geocities.com/titos88911/MY911.html

Juan,

Tell me a bit more about your turbo system? What kind of turbo are you using? WHo did your chip? are you intercooled?

Thanks

Scott

Scott,if you go to the top of the page and look at topics from last 45 days then go to # 2,you will find the complete report,and the rest of the inf,is in the web page that i posted in case that you are interesred in the whole combo deluxe package,but to answer yous qs,is a Garett turbo,the chip is custom,and no intercooler yet but is on the WAY SOOOON!!!!!!
hope this help
Regards Juan

Juan, Good HP !! You gotta figure you lose at least 20% going through the drivetrain,so you picked up at least 75 or so with the turbo. You're well on your way !!
Marc

My prediction: Car go BOOM.

Juan - those figures are right in line with the SOK supercharger setup w/no intercooler. Good for 260HP at the rears in an SC. A 3.2L displacement with the same setup as th 3.0SC would be worth 277HP. This is a safe margin if the boost is tied down. Obviously, adding an intercooler would give you an even bigger margin of safety. I wouldn't try to bump up the HP any more though, unless you lower the compression. Enjoy the ride!

By the way - they DID recommend the highest octane fuel, right? At 0.5bar you have added around 1.85 compression points to your engine. I can't remeber right off, but I think the Carrera was 9.3:1. This would put you at around 11.15:1 ratio. The Motronic will retard the ignition, but living in Florida with A/C you may need a bit more just to be on the safe side. Protomotive may have told you all this. Just don't want to see anything bad happen to your cool setup!

[This message has been edited by RarlyL8 (edited 12-28-2000).]

50 more? Dude, go get a vette.
I sweat just adding a chip and a few other goodies to my car. It's around now for 16 years because the internal fortitude far exceeds what's required to support the power output. You're going to toast that thing if you keep that up. I'm happy with, what I assume to be around 217 HP. I need to get it dyno tested though.
Jack's got the right idea: You get a bigger normally aspirated porsche engine.
...however, if I'm going to do that, I'd rather just wait for my 993 Dream Car and take the whole shebang.
Oh, after I take off whatever is adding so much weight. What the hell did they put in those cars to make them so heavy?


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Kurt B
1984 911 Carrera Cabriolet
75 914 1.8

[This message has been edited by Kurt B (edited 12-27-2000).]

The weight in the later cars came partly from having more luxury items, heavy motors in the power seats, the retractable spoilers, the climate control system, etc. The cars also got bigger and bigger. A 993 is 5 inches wider and 5 inches longer than a 1973 911.

But the other factor is that they also added a lot to make the car safer. Reinforced side protection, crumple zones, a more rigid chassis. Those are the things I don't want to think about when my early car is sliding through a turn at 120 mph. Current-model convertibles will do better than my car in a roll-over.

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Jack Olsen
1973 911 T (3.6) sunroof coupe

Juan,
did the promotive headers get rid of the heat exchangers? I have been contemplating this mod also. I already have 964 cams and mass air. I rekon I will junk the mass air and go with a MAP type engine management. Does you system retard timining under boost, or are you stuck with the motronic curve?
Cheers.

Thank you guys,i take all the feed back, POSITIVE and negative,obviously some menbers haven't seen a 1200 HP street Porsche but thats another subject.....

Beetos,im my set up im not running headers just the stock heat exchangers,as far as the timming this has not been retarded ,if im stock with the curve? we can remap the chip as many times as we want to obtain the best performance for the set up,different from the mass production chips.hope this help any qs just ask.
Regards Juan

You go Juan!! I don't think that you'll have any problems with the power output you are seeing. PROVIDED that you avoid detonation. **********Will the DME really retard timing?? I didn't know that there was a knock sensor on early DME cars******** If promotive didn't include it, try a rising rate fuel pressure regulator. I might also recommend installing a air/fuel guage (taps off the 02)

Anyway, as I understand it, the 3.2 and 3.3 use the same crank and rods. Also, the 3.2's have piston squirters. I saw your additional cooling fans, so my guess is you'll be fine.

So they used a Garrett.. do you know if it is a T04 or one of the new VNT monsters?? Does the boost come up smooth? what RPMs?

I've been wondering about 60-100 hp more and I think that a low psi turbo might be the most cost effective sol'n.

Thanks again!!!!!!!!

Scott,Thanks ,the turbo is not the monster type, the boost is VERY smooth and comes in at 4100 RPM no turbo lag at all,we change the fuel pressure regulator ,for the money in MY opinon there were 3 choices for me
1- sell the car ,and get a RX-7 and make it a 500 HP car
2- Get a twin turbo supra
3-Install a turbo in my car ,for sure the most economical solution.
by the time we get done with it we will have a realistic $10,000 in the engine,and a 550 HP Monster.....

.

[This message has been edited by beetos (edited 12-27-2000).]

Very cool....Juan,
Have you considered a timing retard device that allows relatively highly advanced timing under vaccum and 0psi conditions but retards a by user definable amount under boost. This will allow a very perky engine under low load and off boost conditions while allowing safe operating under boost conditions. I believe the motronic system just allows a baseline timing map with no reference to positive manifold pressure. Split second sells these devices and I have seen them used on supercharged conversions. I would personally use a programmable system like the SDS units. These programmable systems also allow knock sensors to be fitted which the motronic does not have but I have heard people say that the air cooled motors are too noisey, (however, I am sure that the factory 964 / 993's use knock sensors with their relatively high compression). Any detailed pics of the conversion (turbo etc). Thanks buddy.


[This message has been edited by beetos (edited 12-27-2000).]

Any stock engine can run 0.5bar safely. Adding an intercooler will help with the extra 50 hp you are looking for. Juan's car was done by Proto tech affiliated with Protomotive Inc. Todd Knighton really knows his stuff so Juan can feel safe with his guidance. Besides, Protomotive builds 3.8 twin turbo monsters, so this project is nothing new for him. Their kits include everything needed such as remapped chip, dual stage rising rate fuel pressure regulator,etc. If someone knocks (no pun intended) Juan project, they are either jealous or don't know too much about forced induction.

Mike
1986 Carrera t

Thanks Mike.........

This is not a knock, but a bona fide question.
Doesn't 4100 RPM sound a little high for boost to start. Factory is about 2500RPM right? Turbo diesel Benz about 1800 to 2000. Maybe its the limit of .5 bar.
It would just break my heart to have to drive only between 4100 and 6000.

Sidebar
I've even seen turbos with a can of compressed air piped to the exhaust side of the turbo, with driver operated switch. Push the button and spin it up early.

Second sidebar
A friend in another state had a supercharged 90 model and one short trip made me want one REAL BAD!!! FEAR of the 915 and high compression 3.2 and lack of funds have so far kept me coming up for more air.
I need more comments like "any stock motor..." to boost my confidence. And one comment from the spouse "Sure, honey anything you want. You should also think about getting that nice 89 turbo we saw last week. I really liked that color. Maybe for your birthday."
All puns intended.
David

Can someone confirm something or put me right, but does'nt 'Turbo Lag' refer to when the turbo 'kicks-in'?.
If so, 4,100rpm sounds quite late to me?.
I enjoy driving my car with performance but ususally try to change gear between 4/5000rpm.
That increase in power does sound good though! and an honest dyno power, rather than 'I reckon.....'
What do you normally rev to on acceleration Juan?
rgds
Ben

Ben,

Turbo 'lag' refers to a time delay between the instant when your foot stomps the loud pedal and when the perception in the seat of the pants that engine power is coming up to steam, so to speak! It is not related, strictly speaking, to any rpm level, though different combinations of cams, manifold layout, turbo sizing, etc. certainly can affect both turbo lag and the lowest rpm level at which max boost is available!

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Warren Hall
1973 911S Targa