I have had a thought!

[my89_928gt]

Now I have had my 97 Boxster 5sp for just over a year and half.
I love the car and I dislike it at the same time. The car is just to dam slow. I knew that before I bought it and figured in a couple years I will see what I can do about that. Well in all my researching before buying I did not check into the aftermarket performance area. Well it preaty much sucks. Not much their and what is is way over priced and minumal gains.
The only other complaint was the high speed stabilaty issue. Witch I have gotten used to. Now I'm not saying the car is not stable, just very responsive. Other former 928 owners should understand where I'm comming from on that one.

Now to my thought,
I'm thinking of buying a higher millage used boxster engine(2.5 like I have is ok-they can be gotten preaty cheep)and tearing it down and rebuilding it. Putting in lower compresion pistons, maybe larger valves if can be had, and maybe cam's(though costly) what ever else maybe required like extra cooling. Then put a supper charger on running high boost in the mid to upper teens.
If done right I figure this should be more than I can handle and if something gose wrong with it, well I would still have my good engine.

Any one know is some has done something like this?

Richard

[deliriousga]

Sounds fun to me!!!

How are you planning on taking care of the "float" at high speeds? That's what it feels like to me, kid of like the wheels are still tracking but the body floats so it feels like it's not holding well. I think the 928 does this better because of the weight up front.

I saw a Boxster that was getting a 450HP engine put in when I first got mine, but I have no idea what was going in to get it up that high. It was at a shop I was checking out for future mods.

The aftermarket stuff you were looking at won't come down in price until they Boxsters get older and there is more competition.

[MNBoxster]

HI,

You've hit on a real issue here. Unlike a smallblock V8, which is fairly easy to get 10-30-50HP gains, the Boxster Engine, be it 2.5, 2.7 or 3.2 just doesn't readily lend itself to being modded.

In order to see any increase worth the trouble and expense, you have to get pretty drastic. And then you butt into other issues such as packaging, cooling (both for the coolant, but also the engine bay), reliability (especially the tranny) and possibly Brake cooling issues as well.

Given that it is a convertible chassis, I bet you can also overpower a Boxster pretty easily. I suspect you could easily ruin the car.

That said, rather than try to pump up a Boxster engine, I bet the 996 engine conversion, difficult as it is would be a better improvement. It has already been done, so you don't have to reinvent the wheel as it were and you'd get pretty much the same reliability. Also, You would forego all the problems, plumbing and such of forced induction and probably stay under the threshold which would ruin the overall balance of the car.

Happy Motoring!...Jim'99

[Brucelee]

The easiest cheapest mod would be an S engine swap.

Ads 50 HP and have no compatibility issues to speak of.

IMHO!

[MNBoxster]

Originally Posted by Brucelee

The easiest cheapest mod would be an S engine swap.

Ads 50 HP and have no compatibility issues to speak of.

IMHO!

Hi,

This would not be as easy or cheap as you might think. The 3.2 Engine (2000>) is an e-gas Engine, whereas the '97 M96 2.5L is not. This means new DME, Exhaust System, Intake System, Fuel Evac System, Wiring Harness, Plumbing, Transmission Sensors to name just a few.

On the other hand, a pre-2000 3.6 swap would eliminate the need for much of this.

Happy Motoring!...Jim'99

[Brucelee]

"On the other hand, a pre-2000 3.6 swap would eliminate the need for much of this"

Not according to my local dealer service swap. I went over the 3.6 swap with them once and was stunned by how much work needed to be done.