I thought the MAF maxes out at 250 HP. So wouldn't that need to be changed aswell if the car was to have 300 HP

If it does max out at 250 then I would be running into some problems too wouldn't I?? I mean since I am apparently am knocking on 250's door;):D:D

But yeah, Chances are that alot of the little bolt ons were changed... Just think of how much different the car would have been if it had come out with a 309hp H-6 instead of the 230hp that we got stuck with... Man, that is something to have good dreams about :D

~ Chris

That's pretty much all Stage whatever-v7 is, isn't it? Bigger injectors, maf, and reflash? That should be a simple enough rumor to debunk, is no one has that stage I will eventually.

I would believe it. Except that the Japanese SVX and UK SVXs make the same power we do and so that kinda shoots the whole "stupid american driver" bit right out the window.

But it's pretty much been proven by RallyBob that the stock motor is detuned like crazy and just needs a new ECU and injectors to nail a lot better power figures. :)

I'd love to believe it but I am running 2v7 which is bigger injectors, a capable maf, and ecutune software that is giving the correct fuel mix along with a custom exhaust system and I am sure I am no where near 300 hp. I believe it has smoothed out the power delivery and given a decent increase in top power but there is no way it added 70hp.

Well... all I can say is, look at the 'Bolt-on' engine that RallyBob designed. All it was was intake, exhaust, injectors and ECU. And it made 275 HP. :o

RallyBob is my new best friend :D:D

~ Chris

Chris,
Just be careful, it wasn't all that easy;) RallyBob's engine had WebCam custom high lift cams, gutted EG33 lifters (converted to solid with shims), and plenty of Bob's custom headwork on the I and E ports.:cool:
-Bill

Some one should do a before and after dyno of 2v7.
Ether way I would like to get it.

Question for people who have 1v5.
Does your car run rich?
My exhaust tips are black and when I take off with some one behind me they get a cloud of gas, but my fuel to air gauge stays in the green. I wounder if I should clean my MAF and/or get new O2 senors.

I don't have an A/F gauge, but I wouldn't doubt that I run alittle rich... Not that it bothers me terribly. Since last week when i installed it, it has been getting more and more powerful! Drove it last night and almost couldn't resist running it up to about 5500 rpm every time I accelerated :D Feels so good now compaired to stock :D

~ Chris

Hi, my name is Chris and my SVX gets 8 mpg:lol::lol:
-Bill

lol.
I get about 19 MPG and I drive like that too.:D

Haha... I still haven't been through the tank that I filled up in Wilmington, so I'm not sure how bad the fuel mileage will be... I honestly wouldn't be surprised if it drops a bit though :(

~ Chirs

i'd be happy to do a dyno session after i change out my trashed 5 speed... If someone pays for it... or gives me discount on my next ECUtune purchase ;)

I WAS too busy before to go waste time at a dyno with a car I don't have the means to tune... but now that I work a 9-5 ..or whatever I want.... with weekends :D

I am curious to see what it is putting down.

3.316 liters = 202.4 inches³


HP * 793,000
BMEP = -------------- PSI
RPM * CID

230 * 793,000
BMEP = -------------- PSI = 161 psi
5600 * 202.4


309 * 793,000
BMEP = -------------- PSI = 216 psi <--has never been accomplished
5600 * 202.4

309 * 793,000
BMEP = -------------- PSI = 183 psi <--a reasonable #
6600 * 202.4


If the prototype made 309hp at 5600 rpms it would have made the news and been the talk of the industry. No manufacturer has ever gotten a mep of 216psi though honda did come close with a jdm s2000 at 8500 rpms where thermal efficiencies are higher. While ther is no way it made 309hp at 5600 rpms, if the prototype had different cams it could make 309 crank horse power at a higher rpm. There is a plot of volumetric efficiency in the overview of the induction control system in section 2.7 page 8 of the factory service manual which does not match the production SVX. It indicates a peak volumetric efficiency of 97% at 5200 rpms which would indicate a torque peak at 5200 rpms. If we presumed that plot of ve matches the prototype svx then we could project it having a peak power of 309 hp at 6600 rpms. This would mean the prototype had different cams. I would be inclined to believe that.