Silverstone Performance exhaust
Discussion
Just finnished fitting the new exhaust system from Silverstone Performance and believe me this sounds absolutely awsome. Matt form SP says that this system will increase the power of your cerb (I cannot confirm this just yet but I will let you know when I check this out).
The build quality is excellent check out their website there are pictures of it on there. The system is also easy to fit. The pipes are 2 1/4 inch increasing to 3 inch polished stainless steel end pipes.
On the tickover the exhaust is alot quieter but the noise when you accelerate is unbelieveable
.
The build quality is excellent check out their website there are pictures of it on there. The system is also easy to fit. The pipes are 2 1/4 inch increasing to 3 inch polished stainless steel end pipes.
On the tickover the exhaust is alot quieter but the noise when you accelerate is unbelieveable
.I was the guinea pig for SP's first exhaust and after looking at the alternatives on the market, it was the best decision i could make.
It looks and sounds absolutely fantastic, totally designed to compliment the car.
Thanks again Matt and p.s. if you read this i know i owe you a call.
It looks and sounds absolutely fantastic, totally designed to compliment the car.
Thanks again Matt and p.s. if you read this i know i owe you a call.
Have you gone for the exhaust with our without cats? My exhaust needs replacing and it seems the top alternatives (for me) are:-
Original
SP
ACT
I have (what I think is) a TVR sports exhaust, it is very loud without cats but the noise is very high pitched. I'd like more bass. But I dont want max power tail pipes (eg Blue Flame?).
Original
SP
ACT
I have (what I think is) a TVR sports exhaust, it is very loud without cats but the noise is very high pitched. I'd like more bass. But I dont want max power tail pipes (eg Blue Flame?).
I went for the linked decats that SP provide with the system. The noise is much deeper than the sports pipes and a lot quieter under 2500rpm. From behind the car they look like what the origionals should have done and fill the arches in the bodywork perfectly. I will get some pics over the weekend and post them up for you to see.
PS. big thank you to Matt (top bloke)
PS. big thank you to Matt (top bloke)
gazzab said:
Have you gone for the exhaust with our without cats? My exhaust needs replacing and it seems the top alternatives (for me) are:-
Original
SP
ACT
I have (what I think is) a TVR sports exhaust, it is very loud without cats but the noise is very high pitched. I'd like more bass. But I dont want max power tail pipes (eg Blue Flame?).
Original
SP
ACT
I have (what I think is) a TVR sports exhaust, it is very loud without cats but the noise is very high pitched. I'd like more bass. But I dont want max power tail pipes (eg Blue Flame?).
Why don't you have a bespoke system made like I did? I am sure that Andy could point you in the right direction, and it'll probably work out as cost effective as buying one of the other systems. Failing that then the ACT and SP are way superior to the original or "sports" exhausts, from a performance, sound, aesthetic and build perspective.
Jules.
It certainly looks well made. Like Jules, however, I wondered why they didn't go for larger bores before the backbox. Maybe they tried it and it didn't show any benefit?
I can't help raising an eyebrow at the idea of swapping the backbox alone liberating 36Bhp. The last thing we want is another bunfight but that's phenomenal!
I'd love to see someone (with more money spare than me right now) go for the ACT (JP Exhausts?) manifolds too (with any necessary map tweaks too of course) to see the overall results. Go on, you know you want to!
I can't help raising an eyebrow at the idea of swapping the backbox alone liberating 36Bhp. The last thing we want is another bunfight but that's phenomenal!
I'd love to see someone (with more money spare than me right now) go for the ACT (JP Exhausts?) manifolds too (with any necessary map tweaks too of course) to see the overall results. Go on, you know you want to!
I've been looking at the SP system but I'm torn as I just love the sound of mine, with its TVR Sports exhaust - So much so that I rejected an "upgrade" to a 4.5 and stuck with my 4.2, just because I loved the sound of mine.
I'd definately have to hear the SP system before I went for one as @ 4,000rpm, I'd be losing 10Db and I do love purring along, listening to my V8 soundtrack - even in the perishing cold (minus 3 or below!) I'm the nutter with the windows down enjoying the roar.
I'd definately have to hear the SP system before I went for one as @ 4,000rpm, I'd be losing 10Db and I do love purring along, listening to my V8 soundtrack - even in the perishing cold (minus 3 or below!) I'm the nutter with the windows down enjoying the roar.
daver said:
I can't help raising an eyebrow at the idea of swapping the backbox alone liberating 36Bhp. The last thing we want is another bunfight but that's phenomenal!
Where is that claim made?? IIRC It was BossCerbs car that gained 36bhp, but wasnt running right before - I believe he was going to get a proper before and after done at a later date, but I've not heard anything more about it?
It's fair to say that the 36bhp gain that we saw (and we did a same day back to back test) is something of a freak result - but a genuine one nevertheless. What we know for sure is that our system delivers the maximum possible performance from a manifold-back system without causing noise problems (it's track compliant). The back box shares gases from both banks to create a beautiful "tuned" sound from a flat-plain crank engine. Typical power gains will be in the 10-20 bhp range as a bolt on product. We'll be doing some tests to see how much additional performance the system can free up with custom mapping but we expect further increases. Interestingly, during our testing we saw that other sports exhausts actually lost power!
Delighted to see that you're happy R8NAN (great pics by the way), and look forward to hearing from you JFK1958.
Delighted to see that you're happy R8NAN (great pics by the way), and look forward to hearing from you JFK1958.
I know that Phil's car left here with 413bhp and was subsequently tested on another dyno dynamics dyno at WRC and made 380-something .. I suspect the std back box had fallen apart at that point hence the big 36hp gain with the SP system. However I also understand that after the SP system was fitted it made a good improvement on 413hp so the system does release hp over a std TVR back box IMO 
Cyclone and i know for ourselves that the std pipework dimensions are a limiting factor to hp on the cerbie cat back system, so going to bigger bore or smoother curves or other flow-smoothing systems like linking the two pipes in the system (such as linked decats) will generate hp compared to a std system.
The linked decats are worth 5-8hp and geting a bigger bore into the rest of the system is worth a similar amount .. so claims of 10-20bhp are entirely believable for the SP system.
It's also good to see that you found losses on some sports pipes, something i've been saying for years
Sounds like SP have been doing some proper deveopment here, the piccies of the system look great too .. truly a worthwhile upgrade
Cyclone and i know for ourselves that the std pipework dimensions are a limiting factor to hp on the cerbie cat back system, so going to bigger bore or smoother curves or other flow-smoothing systems like linking the two pipes in the system (such as linked decats) will generate hp compared to a std system.
The linked decats are worth 5-8hp and geting a bigger bore into the rest of the system is worth a similar amount .. so claims of 10-20bhp are entirely believable for the SP system.
It's also good to see that you found losses on some sports pipes, something i've been saying for years
Sounds like SP have been doing some proper deveopment here, the piccies of the system look great too .. truly a worthwhile upgrade
Nice photos Ronan!
Unfortunately the 36bhp gain didn't hold when my 4.5 ran better in the 'before' test but it was precisely what happened on the day. However my car now consistently exceeds TVR's original 420bhp claim thanks to Joolz's efforts and the SP system.
The exhaust sounds the nuts, looks the nuts and I can use all the car's added grunt at trackdays. And tunnel runs.
Unfortunately the 36bhp gain didn't hold when my 4.5 ran better in the 'before' test but it was precisely what happened on the day. However my car now consistently exceeds TVR's original 420bhp claim thanks to Joolz's efforts and the SP system.
The exhaust sounds the nuts, looks the nuts and I can use all the car's added grunt at trackdays. And tunnel runs.
BossCerbera said:
Nice photos Ronan!
Unfortunately the 36bhp gain didn't hold when my 4.5 ran better in the 'before' test but it was precisely what happened on the day. However my car now consistently exceeds TVR's original 420bhp claim thanks to Joolz's efforts and the SP system.
The exhaust sounds the nuts, looks the nuts and I can use all the car's added grunt at trackdays. And tunnel runs.
Unfortunately the 36bhp gain didn't hold when my 4.5 ran better in the 'before' test but it was precisely what happened on the day. However my car now consistently exceeds TVR's original 420bhp claim thanks to Joolz's efforts and the SP system.
The exhaust sounds the nuts, looks the nuts and I can use all the car's added grunt at trackdays. And tunnel runs.
420+ from a standard 4.5 Cerb is going some, what torque figure did it achieve
daggart said:
trackcar said:
I know that Phil's car left here with 413bhp and was subsequently tested on another dyno dynamics dyno at WRC and made 380-something ..
Shame Cyclones car wasn't tested independantly as well,it would have shown his car producing around 385bhp which is more realistic when you look at the mods that were done to it.I had my motor tested on two different rollers and it showed in fourth gear there was only 5bhp in it....Discuss.......
Sour Grapes? It was tested on Surrey Rolling Road, Nobles and at Track Car Solutions while I owned it
Read the threads if you can be bothered it's all there, full explanation, graphs, Q&A, blah, blah, blah............unlike certain others who just posted up pipe dream figures done on a questionable rolling road that has since been replaced.
Grow up and let it lie.
Edited by Cyclone1 on Tuesday 2nd January 21:01
Gassing Station | Cerbera | Top of Page | What's New | My Stuff