Exhaust Argument, Help resolve it!

27th February 2011, 00:36

Ok so me & my mate are having an argument, He thinks the Kam Racing system is better for performance whereas i think the saxsport/pugsport is much better especially for noise, And dont say "Kam racing is better cos i have it" cos that solves nothing, If anyone has any rolling road printouts etc that'd be great

27th February 2011, 00:39

..all you need to know is here mate, nothing but a bit of 2 minute searching resolves the problem

.

http://www.saxperience.com/forum/sho...d.php?t=359542

27th February 2011, 00:39

This thread might interest you

http://www.saxperience.com/forum/sho...d.php?t=359542

it was on the first page about 10 threads below yours

27th February 2011, 00:40

..Great minds think alike Pearson

27th February 2011, 00:41

Quote:

Originally Posted by Sunday

Ok so me & my mate are having an argument, He thinks the Kam Racing system is better for performance whereas i think the saxsport/pugsport is much better especially for noise, And dont say "Kam racing is better cos i have it" cos that solves nothing, If anyone has any rolling road printouts etc that'd be great

Simple search found the answer you were looking for.

Quote:

Originally Posted by jonathon5

This is my unbiased opinion, I do not have a company or product to promote. I just wanted to get the best setup for my track car.

Previous scenario, I had the car cammed in november & the results were not amazing the car was producing 143 BHP @ 6313 rpm which is a low revs peak power for a car fitted with 708's. No mnatter how the timing or mapping was set this was the best it did. We thought the exhaust was restricting the top end power as we expected the car to be making 145 - 150 bhp with the set up it had & higher up the rev range.

Setup in november :

Ambient Temp -7 deg c

Catcam 708's with custom remap
Manifold Ashley Competion 4-2-1
Exhaust Magnex With decat
Air filter Modified raceland with big Wolrace & modded slam panel

Max power 143 BHP @ 6313 rpm Raw Uncorrected figure

So I needed a new Exhaust :

So first off I went out & bought a Saxsport 2" race tail pipe:

Design :

This a really nice 2 piece sleeved decat exhaust system with a dummy cat (This is a pointless it just adds weight), the exhaust is made from thin walled stainless & has a real nice manifold connection design. It does not requre a gasket as the manifold connection end is rolled, the flange to bolt up to the manifold is also free to mount to any manifold as it spins. The bolt holes on my Ashley manifold not the same orientation as standard the ar at 45 degress so the Saxsport was easly to fit.

Noise :

The Exhaust when cold is not to loud, but very hollow & raspy sounding.

But after a bit of a thrash & it get hot , Fuck me it gets loud !!! PoP Pop, Bang Bang

The sound just becomes fucking annoying after a while, I really could not get on with the sound at all, it sounds like its blowing when its not.

Sound test results on an official calibrated track test meter.

93 dbA @ 4750 static test 0.5 meter from tail pipe @ 45 degrees this was done with the exhaust warm (not roasting)

The power run was done with no timing or mapping alterations.

147.29 bhp @ 7000 rpm correction factor was 1.03So we appear to have gained 4.29 bhp over the magnex

I also went out & got hold of a 2" Kam racing System

Design This is a nice lightweight 3 piece system, it has one sleeved piece & one clamped up piece. I needs a gasket to connect it to the manifold. The Manifold connection flange is also fixed , which posed a problem as it would not mate up to Ashley manifold as the are at different angles. So we had to chop & reweld it to make it mate up. It will be fine for a standard manifold . The Kam is also slightly less bendy than the saxo sport.

With a change to the manifold mounting arrangement (to be like the saxsport) Kam could be onto a winner here.

Noise:

Once again very hollow sounding & Raspy . But this system was slightly more vocal than the Saxsport from the off. Once again it can pop & bang on overrun. But it is a loud exhaust again.

95 dbA @ 4750 static test 0.5 meter from tail pipe @ 45 degrees this was done with the exhaust warm (not roasting).

The power run was done with no timing or mapping alterations.

147.41 bhp @ 7017 rpm correction factor was 1.03So we appear to have gained 4.41 bhp over the magnex

CONCLUSION :
Both Exhaust do offer an apparent power gain oven my last setup but there is not much in it realy. This pureley comes down to being a bit more freeflowing with cams in. The magnex has a restriction on the joint where it joins the decat pipe the diameter is only 42mm not 50mm. So a true 50mm Bore free flow system has sorted the problem.

But both of the saxsport & The Kam are way too loud for me to use on my local track &
i can also see you getting a tug of the police.

It will purely come down to your personal choice.

So We tried one more thing !!!!!
We added 2" freeflow 14" x 4" centerbox silencer to replace dummy cat on the saxsport.

result 84 DBA @ @4750 static

146.7 bhp @6990rpm

I think Kam are already looking at a silencer option for there system look forward to seeing the results

Found in this thread.

EDIT: People beat me too it :'(

27th February 2011, 00:51

is it only me that thinks these threads get made to take the piss? seeing as though they get made the same day or a few days later when a certain topic is still fresh on the forum.... then ask exactly what a popular topic expands on....near enough word for word??

27th February 2011, 01:08

Quote:

Originally Posted by blackie_2k5

is it only me that thinks these threads get made to take the piss? seeing as though they get made the same day or a few days later when a certain topic is still fresh on the forum.... then ask exactly what a popular topic expands on....near enough word for word??

People just don't look for the answer, don't search or read the relevant stickies.

27th February 2011, 01:13

haha, i know mate, but the last week or two ive come on here.... and theres been some pretty specific topics in full flow..... then a few days/1 weeks later, someone comes on with the same topic, pretty specific again and asks again near enough word for word? several times on diff topics.... seriousley cant be that co-incidental

27th February 2011, 01:39

Good system but i do think it comes down to your manifold and cat or de-cat but good bit of info definately going to look at a decent stealth exhorzt

Edit: That info above is good but its not about bhp its about ftlb torque! Wonder what the difference in torque was