Rich196 103 Report post Posted January 11, 2017 @tegunulgener What are you running now? Share this post Link to post Share on other sites
tegunulgener 84 Report post Posted January 12, 2017 It's HKS headers I'm on now Sent from my HTC One M9 using Tapatalk Share this post Link to post Share on other sites
Rich196 103 Report post Posted January 12, 2017 33 minutes ago, tegunulgener said: It's HKS headers I'm on now Sent from my HTC One M9 using Tapatalk Is that 4-2-1 too or 4-1? If so why are you on this instead the H&S Share this post Link to post Share on other sites
tegunulgener 84 Report post Posted January 12, 2017 It's 421.decatted Sent from my HTC One M9 using Tapatalk Share this post Link to post Share on other sites
Kodename47 446 Report post Posted January 12, 2017 35 minutes ago, Rich196 said: Is that 4-2-1 too or 4-1? If so why are you on this instead the H&S The H&S cracked in a hard spot to repair well. It was the Cossie prototype one too. Share this post Link to post Share on other sites
tegunulgener 84 Report post Posted January 12, 2017 No its not the reason. Crack been fixed by Mark and its solid. It's actually wasn't a crack. Weak welding point or something. It's solid and fine. Mark said something about cat and told me to buy HKS and I did. Sent from my HTC One M9 using Tapatalk Share this post Link to post Share on other sites
tegunulgener 84 Report post Posted January 12, 2017 I'm actually thinking to put it back since HKS is too loud... İ need to find some time for it first. Didn't make my mind up yet. Sent from my HTC One M9 using Tapatalk Share this post Link to post Share on other sites
CGR Automotive 28 Report post Posted January 16, 2017 The 4-1 design we fitted to Rob's car was designed for more top end driving, the lengths and diameters are tuned to give a bigger increase in the higher RPM band as the car already has plenty of low-end torque and Rob agreed that this would be the best option. Just to clear a few things up; We can design a 4-1 system to give a bigger advantage at a low-mid rpm by tuning the lengths and diameters it's not strictly true that a 4-1 system only increases top-end. A 4-1 manifold will give much bigger increase at one RPM point compared to a 4-2-1 which would give a milder performance increase at two separate rpm points so essentially across a wider RPM band. You can tune 4-2-1 systems or stepped manifolds for high-end power too, but the increase is milder and across a slightly wider RPM band and generally not seen as advantageous on the road compared to a 4-1 manifold. By running equal length primaries, you will also get a lift across the entire torque band too, as well as the RPM point where the lengths and diameters are tuned for unlike and un-equal length manifold, and with more effect than a 4-2-1 manifold. The most important part really is the collector, this determines how much everything lifts by and how effective the primaries are, without a well designed collector, everything else is pointless (this is where most other manifold designers and manufacturers neglect). Hope this was helpful and any other queries don't hesitate to ask away 3 Ade, Bfranklyn86 and tegunulgener reacted to this Share this post Link to post Share on other sites
Ade 517 Report post Posted January 16, 2017 No its not the reason. Crack been fixed by Mark and its solid. It's actually wasn't a crack. Weak welding point or something. It's solid and fine. Mark said something about cat and told me to buy HKS and I did. Sent from my HTC One M9 using Tapatalk H&S use the best quality german cats, so cant see them being an issue. Did H&S decline to repair it for free? They come with lifetime warranty. Share this post Link to post Share on other sites
tegunulgener 84 Report post Posted January 16, 2017 I don't have problem with H&S. Mark repaired it. Sent from my HTC One M9 using Tapatalk Share this post Link to post Share on other sites
tegunulgener 84 Report post Posted January 16, 2017 @CGR automotive, that was a good explanation. Thank you really. I was truly trying to understand the differences since my MR2 Sent from my HTC One M9 using Tapatalk Share this post Link to post Share on other sites
Bfranklyn86 52 Report post Posted January 22, 2017 On 16/01/2017 at 9:47 AM, CGR Automotive said: The most important part really is the collector, this determines how much everything lifts by and how effective the primaries are, without a well designed collector, everything else is pointless (this is where most other manifold designers and manufacturers neglect). Hope this was helpful and any other queries don't hesitate to ask away CGR, thanks for taking the time to explain things, much appreciated. i don't quite understand how the collector can be as influential as the runner length/diameters etc in power generation. Is it that the turbelunce created by a poorly designed collector can be quite detrimental? Also, Rob, any dyno results yet? Share this post Link to post Share on other sites
CGR Automotive 28 Report post Posted January 23, 2017 On 22/01/2017 at 9:25 AM, Bfranklyn86 said: CGR, thanks for taking the time to explain things, much appreciated. i don't quite understand how the collector can be as influential as the runner length/diameters etc in power generation. Is it that the turbelunce created by a poorly designed collector can be quite detrimental? Also, Rob, any dyno results yet? Basically having the right length and diameter primaries are pointless with a badly designed collector as it'll negate any positive effects that should be caused by the tuned runners. If you look at our collectors the primaries always run parallel to each other before merging and normally they're very close together meaning the deflection between primary outlet and collector outlet is minimal meaning the velocity of gas leaving the collector is maximised and there's no resistance/back-pressure, plus the firing sequence is optimised in the collector which is something a lot of people/companies ignore for some reason. Share this post Link to post Share on other sites
rob275 1817 Report post Posted January 23, 2017 @Bfranklyn86 Unfortunately we had some issues on the dyno, the car was losing power. I won't go in to too much detail just yet until we find out what the problem is exactly. Though we think we may know, we need to sort some time to test this theory. Share this post Link to post Share on other sites
Bfranklyn86 52 Report post Posted January 26, 2017 Thanks for the update, Rob. I'm keeping close tabs on this as I'm after a 'top of the rev range' oriented manifold myself. Hope you get the problem fixed soon. Share this post Link to post Share on other sites
rob275 1817 Report post Posted February 5, 2017 Charlie picked up the car today to take it back to Sheffield to get the exhaust right as there's still some minor issues with it. But before that I managed to finish off my false floor for the boot. With my sub mounted at the side of the boot and the EDFC motors it always proved tricky to get the boot lining out to reach underneath. It now looks like this Sent from my ONEPLUS A3003 using Tapatalk 6 Lauren, Ztox, tegunulgener and 3 others reacted to this Share this post Link to post Share on other sites
Ade 517 Report post Posted February 6, 2017 Looks great. Hope the exhaust gets sorted swiftly. Share this post Link to post Share on other sites
tegunulgener 84 Report post Posted February 8, 2017 Nice... Does it sound as nice as it looks? Sent from my HTC One M9 using Tapatalk Share this post Link to post Share on other sites
MrWoohoo 6 Report post Posted March 6, 2017 Car looks great, so many nice parts. Also nice to see someone with the +oem audio kit over here, had my eyes on this kit months before I even got my car, glad to know they can ship it over here. Also that whine from that Sprintex S/C is awesome, I really wanted to Sprintex S/C my Honda Civic ESI back in the day, sigh. Share this post Link to post Share on other sites
