285 whp!

[SVXRide]

Originally Posted by oab_au

10"x10"=100 sq" X 10lbs/sq" =1000lbs. Yes I guess it would flex a bit.

The engine will achieve a VE of 106%, in its standard state, at higher rpms it will achieve 110%.

Harvey.

Harvey,
Welcome back! Glad to have you as part of this thread!!
-Bill

[SVXRide]

"Special Sauce" cams are now operational in Racer X (the rest of the short block is totally stock). I'll have the car on the dyno within the next 30 days (so no need for "but they're GTech curves" comments)
-Bill


Before and after GTech plots (first two=before)

[RallyBob]

Teeny update. I took some pics of the EG33 intake manifold that was modified by the fabricator at XX Tuning. It's a little crude yes, and my pictures suck (bad exposure due to flash), but you get the idea. The view inside the plenum shows the supports that were added to prevent the 'cave in' that occurred previously.

[TomsSVX]

Looks pretty good. too bad the volume cannot be adjusted for measuring purposes. I am guessing it was jigged up on a spare long block??

Tom

[RallyBob]

Originally Posted by TomsSVX

Looks pretty good. too bad the volume cannot be adjusted for measuring purposes. I am guessing it was jigged up on a spare long block??

Tom

I agree, I'd have loved to have made it adjustable for volume if I had the time to build it myself. But I think it will help nonetheless.

That is Jack's spare engine he bought, the one we 'stole' the heads and cams from for his existing engine combo. He didn't want to be without his car while the cams were getting welded and ground (5 weeks) and while I did the head porting (one day) and waited for the machine shop to complete them (4 months for the machinist!).

[Sir. Nate]

I love the custom airbox

[GreenMarine]

Originally Posted by Sir. Nate

I love the custom airbox

I bet it'll pick up alot of bugs, maybe a bird or two?

~ Chris

[Dessertrunner]

Not sure but is this the Dyno's on Mad Jack's car you talk about Rally Bob. I got it from here.

http://www.xxtuning.com/dynocharts/dyno2.php

Select Subaru,
then Impreza RS
then XXJack

Tony

[RallyBob]

Originally Posted by Dessertrunner

Not sure but is this the Dyno's on Mad Jack's car you talk about Rally Bob. I got it from here.

http://www.xxtuning.com/dynocharts/dyno2.php

Select Subaru,
then Impreza RS
then XXJack

Tony

Yes it is! I didn't even know those charts existed. Looks like that was with the standard engine with headers/airbox/aftermarket ECU.

[Dessertrunner]

Looks like those few changes made a difference, I take it this is WHP?

[RallyBob]

Originally Posted by Dessertrunner

Looks like those few changes made a difference, I take it this is WHP?

Correct. Technically, it's 'hub hp', as the dyno used is a Dynapack, and the wheels are removed for dynoing purposes.

Regards,

[RallyBob]

Well, I promised an update regardless of the outcome. The revised 'big plenum' stock intake significantly lost hp and torque. In fact it also narrowed the powerband appreciably. Jack finally got the car on the dyno and the results were: -30 whp/-25 ft lbs of torque @ the wheels. Air/fuel ratio did NOT change with the new intake. Timing was messed with, but it changed nothing. So that experiment was a major let-down. To confirm it was in fact the intake and not some other variable, the stock intake was bolted back in place and the car re-dynoed. The numbers came right back to within a few hp of before (it was rather humid on dyno night).

Looks like Subaru did a pretty good job with the stock intake design!

[TomsSVX]

Originally Posted by RallyBob

Well, I promised an update regardless of the outcome. The revised 'big plenum' stock intake significantly lost hp and torque. In fact it also narrowed the powerband appreciably. Jack finally got the car on the dyno and the results were: -30 whp/-25 ft lbs of torque @ the wheels. Air/fuel ratio did NOT change with the new intake. Timing was messed with, but it changed nothing. So that experiment was a major let-down. To confirm it was in fact the intake and not some other variable, the stock intake was bolted back in place and the car re-dynoed. The numbers came right back to within a few hp of before (it was rather humid on dyno night).

Looks like Subaru did a pretty good job with the stock intake design!

Interesting... Do you guys have the IRIS system functional in that car??

Tom

[RallyBob]

Originally Posted by TomsSVX

Interesting... Do you guys have the IRIS system functional in that car??

Tom

It's removed completely from the intake.

[TomsSVX]

So essentially, the stock intake you are running is constantly in a balance state?? Rather than occasionally separated by the valve??

Tom