3 inch exhaust cat back??

[C&S Evo7]

the drag cars mentioned above are N/A george ;-) but yes i would agree that a matched header and system will probably work the best.

 

[George K]

the drag cars mentioned above are N/A george ;-) but yes i would agree that a matched header and system will probably work the best.

Aplogies - I was beguiled by yuor 980 bhp quote!!

 

[C&S Evo7]

yep it was actually 984 we then added 500hp nitrous as well, it was a 8000 rpm 8litre big block chevy with billet motor and funky fuel injection about 20k's worth

 

[beppe786]

yep it was actually 984 we then added 500hp nitrous as well, it was a 8000 rpm 8litre big block chevy with billet motor and funky fuel injection about 20k's worth

nice

 

[dave c]

Another perspective, 3inch on any K20 is a good modification for power figures.

However I'd argue that the power figures you're likely to see won't make much of a difference in real world acceleration, but that aside. They do flow free'er especially at the top end of the rev range. Is it worth changing your system???

In my eyes on an N/A setup, no.

The reason I say that is purely for the inconvenience of ground clearance and the cost. 3inch pipes hang very low to the ground.

Also, 3inch isn't always louder and can infact be quieter than many of the 2.5 systems

TDi's 3inch system on an EP3 is quieter than the Spoon system it replaced.

 

[integraleo]

Thread revival!
Most people will already know when I changed my 2.5" to 3" system which was mated up to dc sports manifold I gained 9.4hp. Not a small amount I'm sure you will agree. However for a daily drive it was a bit loud for me even with the largest middle silencer I could fit so I changed it for my kakimoto regu06r

 

[dave c]

Thread revival!
Most people will already know when I changed my 2.5" to 3" system which was mated up to dc sports manifold I gained 9.4hp. Not a small amount I'm sure you will agree. However for a daily drive it was a bit loud for me even with the largest middle silencer I could fit so I changed it for my kakimoto regu06r

doh, didn't notice the thread was so old lol

 

[53 Teegwa]

Another perspective, 3inch on any K20 is a good modification for power figures.

However I'd argue that the power figures you're likely to see won't make much of a difference in real world acceleration, but that aside. They do flow free'er especially at the top end of the rev range. Is it worth changing your system???

In my eyes on an N/A setup, no.

The reason I say that is purely for the inconvenience of ground clearance and the cost. 3inch pipes hang very low to the ground.

Also, 3inch isn't always louder and can infact be quieter than many of the 2.5 systems

TDi's 3inch system on an EP3 is quieter than the Spoon system it replaced.

I agree and disagree with this Dave.

Agree it's quieter (I'm mated to 3" decat into a six sigma racing manifold and at low end it's quiet but loud as he'll at WOT.

In terms of clearance this actually has better ground clearance than the buddy club pro spec I had on before.

Just my experience with my own setup really

 

[dave c]

I agree and disagree with this Dave. Agree it's quieter (I'm mated to 3" decat into a six sigma racing manifold and at low end it's quiet but loud as he'll at WOT. In terms of clearance this actually has better ground clearance than the buddy club pro spec I had on before. Just my experience with my own setup really

That's a fair point about the BuddyClub systems but i think they hang a decent bit lower than most, I had one ages ago but it had been cut and rotated to give better ground clearance otherwise it would have been shocking.

to be fair I overlooked them, I was more meaning stock / mugen / fujitsubo / toda / spoon systems

For example my 3inch system now only gives me 2inch ground clearence which sucks :cry: especially as the suspension is at a fairly sensible height.

 

[53 Teegwa]

That's a fair point about the BuddyClub systems but i think they hang a decent bit lower than most, I had one ages ago but it had been cut and rotated to give better ground clearance otherwise it would have been shocking.

to be fair I overlooked them, I was more meaning stock / mugen / fujitsubo / toda / spoon systems

For example my 3inch system now only gives me 2inch ground clearence which sucks :cry: especially as the suspension is at a fairly sensible height.

Yeah have to agree the BC is rediculous for clearance issues when lowered, im on sportlines and it really sucked.

But yes over the stock/mugen etc the 3" might be an issue to some setups.

 

[beppe786]

Custom 3in or a proven tested 3in off the shelf?

 

[Rob.]

I have more ground clearance with 3" system than the old Spoon exhaust and its 17db quieter !!

 

[53 Teegwa]

Custom 3in or a proven tested 3in off the shelf?

Custom mate

I have more ground clearance with 3" system than the old Spoon exhaust and its 17db quieter !!

Nice to see its quieter for you, need to db check mine and see what's what


Gordon

 

[Wingnuttzz]

I have more ground clearance with 3" system than the old Spoon exhaust and its 17db quieter !!

That is a lot quieter!! Got me thinking

 

[53 Teegwa]

That is a lot quieter!! Got me thinking

You know you want to


Gordon

 

[beppe786]

I have more ground clearance with 3" system than the old Spoon exhaust and its 17db quieter !!

anything would be quieter than the spoon i had one on the dc2 horrible

 

[Wingnuttzz]

You know you want to


Gordon

Oh I do, with a PLM manifold too. Should make good power. Really can't afford it though, looks like I might be having to sell a couple of bits and pieces and I don't really need. :-(

 

[Rob.]

anything would be quieter than the spoon i had one on the dc2 horrible

Rather loud aren't they !

The 3" exhaust is 89db static test at 6k revs