The Subaru SVX World Network

The Subaru SVX World Network (https://www.subaru-svx.net/forum/index.php)

- Proven Engine Enhancements (https://www.subaru-svx.net/forum/forumdisplay.php?f=62)

- - SVX with ITB (https://www.subaru-svx.net/forum/showthread.php?t=64857)

AS the title says I have the car running with ITB just need to head to the dyno for tuning then head to the race track.

https://www.youtube.com/watch?v=FXy0IyAwy8Q

Re: SVX with ITB

Quote:

Originally Posted by Dessertrunner (Post 750746)

AS the title says I have the car running with ITB just need to head to the dyno for tuning then head to the race track.

https://www.youtube.com/watch?v=FXy0IyAwy8Q

Nice throttle response! Curious about the power changes with this setup.

What size throttle plates are you running?

Re: SVX with ITB

Please please please tell me the stacks will protrude from the hood!? That would look so badass!

Great job, are you running aftermarket engine management? I don't see a MAF...

Can't wait to see video of you tearing up the track!

Re: SVX with ITB

Quote:

Originally Posted by RallyBob (Post 750747)

Nice throttle response! Curious about the power changes with this setup.

What size throttle plates are you running?

Hi Bob,
Running 45 mm have even considered going down to 42 mm. Right now I expect peak torque around 7,500 rpm.

Re: SVX with ITB

Quote:

Originally Posted by SoCoNoHa (Post 750751)

I am running a Link ECU and the maps are based On TPS & rpm.

The stacks will be inside a air filter box so not visible.

Re: SVX with ITB

Did you go with larger valves +1mm?

Re: SVX with ITB

Standard diameter valve, here is the spec
Okay its spec's,

Standard bearings,

High grade rods from Spool,

Pistons are 11.5 ; 1 made by CP in the USA,

Valves longer by Supertech,

Solid buckets,

Matt's high lift cams,

IVO 6 BTDC IVC 40 ABDC

EVO 50 BBDC EVC 9 ATDC

ITB 45 mm diameter, head average area 46 mm. Distance from bell to intake valve is 400 mm. Expect max torque at 8,000 rpm.

Volume in ITB including head is 0.64 litres and the cylinder capacity is 0.55 litre

Injectors are 550 cc ( which maybe too small) we have 860 cc and 1,000 cc if needed.

Have refitted Matts extractor pipes they are 3 into 1. 42 mm ID from engine then join 3 into 1 pipe which is 55 mm ID which is 900 mm from the manifold. Were the pipes join together there is a single pipes per side and they are 60 mm ID all the way to the back.

Peak piston speed at 9,000 rpm will be 22.5 m/sec, which is about the same as most 4 AGE's at 8,000 rpm. If we run to 11,000 we will be more inline with most race engines at 27.5 m/sec.

Engine tune table is TPS and rpm,

Brakes get vacuum from a electric vacuum pump.

Re: SVX with ITB

Old school. Took this pic at the Ferrari Museum in Maranello.

http://www.subaru-svx.net/photopost/...504_081716.jpg

Re: SVX with ITB

Sounds downright wicked!

Re: SVX with ITB

Thanks for the update on the engine spec's:)