Hi

I'm looking at modding a 930. I hear the 3.3 cars up to 1979 can take mods to 450hp without changing the fueling system.

What are the "first steps" to 930 modification to begin with and what can I expect?

What should be done first?

Max

 

First, check your bank account. Second, decide how much you want to spend, otherwise the sky's the limit. Third, take the time to talk to a knowlegable engine builder to figure what's best for your intended use of the car. Fourth, go for it.

 

Right, well I've got a budget of about 20K. Does that help? Where to start?

 

get your car and motor inspected first, It is sensless building a high powered engine, if your base engine is in failing health or your chassis isnt up to it, suspension and brakes are important too. what do you want? a canyon carver, track car, or a highway missle? there are lots of options, P's and C's, cams, , twin plug, digital F.I. ball bearing turbo, intercooler, 750 hp, trans swap and build, the limit is really what you want to spend on the car. Just make sure you pick a good shop that knows what they are doing. I have a car right now that the guy came to us first for a 500 whp 968 turbo and thought we wanted too much to do it, took it some where else and had it done, now, its back with us having the work done proper.

 

My thinking is that you should have a solid foundation before you start building a house. So here's the order of execution for my modifications. I have limited knowledge of auto mechanics (I'm learning, though), but this just seemed logical to me. My car is an almost every day driver and part-time canyon carver.

1. Engine cooling - install auxillary front oil cooler, upgrade fender oil cooler with thermostat controlled fan; ~$3k
2. Upgrade brakes ~$3k
3. Upgrade suspension $??
4. Rebuild transmission $??

And finally the car will be ready for a killer engine (~$25k):

5. Rebuild and modify engine:
3.4 conversion (98mm Mahles)
Twin Plug
EFI converison
Tial Wastegate
Kolken Intercooler
K27 7200
GHL headers w/heat
Still looking at exhaust systems

 

You guys are so smart.

 

1 bar boost spring
Exhaust-B&B, GHL or Fabspeed
Headers-B&B or GHL
Intercooler-Kokeln long neck
K&N air filter and drill a few holes at the bottom of the airbox.
Cams-964 or SC
Andial Fuel enrichment
Set CO to 3.5 to4%
Additional oil cooler upfront with electric fan
Turbo-K27HF
3.4 Piston Cyliner kit at 7.5 compression
Port and polish intakes on cyliner head side
Extrude honed intake manifold to 38mm, you will need aluminium injector blocks
Suspension
Brakes
KEP stage 1 clutch kit

Replace worn out parts and replace all old plugs, wires etc etc and your car will outrun most of the Ferraris out there.

 

$3K for an oil cooler and fan? At most you are looking at $1000 I would think. A decent oil cooler is $450, plus hoses, plus fan, plus fittings, I can't see $3K.

I did mine for less than $1K by coming off of the existing oil cooler and adding an additional cooler up front, so my plumbing expenses were small. I didn't install a fan, but I can't imagine a fan is that expensive...

Not trying to argue, just making sure that people's expectations aren't inappropriately set.

That's all.

Brian

 

Yeah that 3k could be high, but it was just a guess based on what I have seen the parts go for. I have to pay for labor for installation, plus I have to buy, paint and install the new front valance, which, of course, I have to pay someone for that too. I'm sure it would be a lot less if I could do the work myself.

 

I guess I'm looking for around 400-450 horsepower. I'd like to outrun the 996 turbos. You know - give them a surprise....

Honestly - who cars about Ferraris? I drove a 328 a few days ago and:

The electric windows worked intermittently
The speedo didn't work
The temp gauge didn't work
The odometer had stopped
It wouldn't go into reverse without going into 1st first

 

The mods I listed above will get you anywhere from 450-500 hp.

 

a 996TT is a bamn bait barge, its a good 900-1000 lbs heavier than a 930, which is roughly a 100 hp differance, once a 930 has started some mods, the 996TT wont stand a chance, they are heavy and it shows in their cornering/braking capabilities, Its really frustrating being behind one on a canyon run when the down hill starts and thier tires and brakes are holding up the line. you heat up your own brakes just to keep from hitting them.

 

So a 996tt weights 4000 pounds , that is news to me . You have to love the experts on rennlist.

 

Lots of over-the-top advice here. I believe the intent is to leave the fuel system intact. And it is possible to get close to your 450 hp goal (at the crank) w/o modification to the fuel system. Here's how:
GHL headers and muffler
K29 or K27 HF turbo
C2 or Koklen intercooler
964 or SC cams
1 bar spring
Freeflow airbox

That's all it takes to get around 370 - 380 at the rear wheels. Keeping the engine healthy requires ensuring it stays cool (suggested aux. oil cooler) and rich with fuel (high CO at idle and the Andial or Rice fuel enrichment). You ought to be able to get all that done for your price.

While you are in there, you ought to upgrade the rod bolts, head studs, valve springs and valve guides. It does get expensive.

I also like the suggestion of doing the leakdown and compression test before doing anything.

If you can find a few more $$$, think about changing your gear ratios - it'll keep you on boost and help with you acceleration. Sorry, I just took you over $25K...I'll stop here

 

My curb weight is 2650lbs(from my owners manual)
A 996TT is 3505(from Porsche.com) -- an 855lb difference. I do love the experts on Rennlist!