new downpipe,hp?

[Sonicpony]

i going to help a friend in stall a 3'' downpipe on his 86 SVO that goes directly to the y pipe with no cat on it.Y pipe is 2.5 w/ flowmasters and 3'' tips.the car already has a SS tubular header. How much hp do u think this would add, will turbo lag be almost eliminated? (20 psi)

 

[t3-svo]

i hope so.... its going on my car! It already breaks dynos as it is! hoping to blow one up now!

 

[Sonicpony]

update, it took 2 hours to switch downpipe because we had to remove the trans crossmember. it looks awesome and sounds very aggressive. the car revs up twice as fast now and the sound of the turbo is very clear, there is almost no lag, after a few exhaust and oil leaks r fixed the car is headed to the dyno i will keep u posted. base #s r 155hp 200tq:SNSign: :Track:

 

[Stinger]

Should pick up 10-15hp with the downpipe alone...

 

[78cobra347]

i going to help a friend in stall a 3'' downpipe on his 86 SVO that goes directly to the y pipe with no cat on it.Y pipe is 2.5 w/ flowmasters and 3'' tips.the car already has a SS tubular header. How much hp do u think this would add, will turbo lag be almost eliminated? (20 psi)

What would really help spool is to take the Flowmaster muffs off and get a straight through design like Ultra-flow or Magnaflow.

 

[t3-svo]

do they have too much back-pressure?

 

[78cobra347]

do they have too much back-pressure?

They have chambers which are not ideal for turbo spool. you want a muff that you can see straight through.

 

[Red_LX]

Why'd ya have to remove the tranny crossmember to install a downpipe?

 

[t3-svo]

had to get hangers undone from the original exhaust. plus it made it easier to remove the old exhaust and install the new downpipe.