toofast2race Posted March 20, 2011 Share Posted March 20, 2011 I guess its a compromise between getting the right angle out of the head and actually getting 6 equal primaries in the space available - presumably the slight change of trajectory out of the port is less of a problem than the primary volume and length - does the exhaust gas actually come straight out anyway?? the ports are actually 3 assymetric pairs ? Link to comment Share on other sites More sharing options...
Nick Jones Posted March 20, 2011 Share Posted March 20, 2011 Steve, As you know, the head ports point down fairly sharply and if you want to follow them down at that angle in pipe you soon run out of room for decent length primary unless you curve them back up again after - creating further space and shaping issues..... Ironically, the Pheonix offerings do a fair job with respect to following the port angle (if you ignore the perpedicular cut flanges and poor alignment) but at the expense of primary length on 2,3,4 & 5. I'm curious to see how the cast TR6 twin outlet thing works on my PI...... just got to match it to the exhaust system now... :-/ Nick Link to comment Share on other sites More sharing options...
GT6Steve Posted March 20, 2011 Share Posted March 20, 2011 As you say Nick, Kas told me years ago that in the end it all comes down to packaging. The available space forces the compromises you choose.... Link to comment Share on other sites More sharing options...
JohnD Posted March 20, 2011 Share Posted March 20, 2011 Chris, Are you concious of the irony of this thread, after the recent 'debate' on GT's qualities? Top bloke GT has supplied you with a top performance manifold. That doesn't fit. John Link to comment Share on other sites More sharing options...
mattius Posted March 20, 2011 Share Posted March 20, 2011 would a custom manifold really cost £1300?? i got a quote much much lower than that. Looks very very similar to my kipping manifold. I too am shocked at the secondaries size! mine are 1" im planning on changing them to 1.5" when it gets rebuilt. Yours look like 2". Link to comment Share on other sites More sharing options...
GT6Steve Posted March 20, 2011 Share Posted March 20, 2011 Ever notice how we all go weak in the knees over extractors? It's like the ultimate man jewelry. :K) Link to comment Share on other sites More sharing options...
CHRIS211083 Posted March 21, 2011 Author Share Posted March 21, 2011 "How much "massaging" would make GT's offering fit perfectly? Afterall, every car is a bit different." Needs massaging at the head, the Y piece for 2 and 3 and then would need matching to the end link pipe. A Fair bit, but that's why agreed to pay £600. Granted it should fit but it doesn't, error are made and im not bothered as GT says he will sort me out. So its cool, im in no rush as ive not even paid for it yet. "Chris, Are you concious of the irony of this thread, after the recent 'debate' on GT's qualities? Top bloke GT has supplied you with a top performance manifold. That doesn't fit. John" Hi John, I started the debate after already agreeing to buy the parts. I have spoken to GT and i think we will get on fine as im a very good judge of character. End of the day his parts give more oomph than others on offer, this was established on the thread i started which wasnt NOT SUPPOSE TO BE A DEBATE!!!!!!!!! It was suppose to be a tell you experience thread with no come backs. Anyway, I wouldn't class this as a top performance manifold, its the best for the price. If it had the special joints and the best collectors that take hours to make then the exhaust would cost a small fortune. However this manifold is what id call a very good compromise between performance and cost. GT has given me and estimated Bhp/torque figure for his cam,head and exhaust manifold configuration. The price was agreed and he will deliver. That's what i want and that's what i will get. "would a custom manifold really cost £1300?? i got a quote much much lower than that." You may have mattius but if you ask one of the best exhaust manifold makers in the country to make you a custom exhaust and to test it etc then the cost will be over £1300. As it will be tested and improved upon until they are happy with the design, performance and fit. That's what you money goes into. If you know a guy who says he will weld an exhaust how you want it then go get it but you will have to test it and try and improve it if you feel it needs it. Do you have the experience to do this and the time??? I don't so ive gone for the next best thing. As for the exhaust you live 15mins from me and ive already offered a cuppa to you? Check your pm. "Ever notice how we all go weak in the knees over extractors? It's like the ultimate man jewelry." Yes Steve, im definitely into the man Jewellery. Maybe some day ill have a manifold as beautiful as the 6 cylinder ones? It would def cost more than £600 though. Dont know why but i still fancy a 4-1, will have to see what it goes like with the 4-2-1. Steve, how much would it cost to get one of those special connectors made for a 4-1, four pipe into one??? Just curious. Cheers Chris. Link to comment Share on other sites More sharing options...
thebrookster Posted March 21, 2011 Share Posted March 21, 2011 Steve, how much would it cost to get one of those special connectors made for a 4-1, four pipe into one??? Just curious. Check them out here, made by a company called Burns, who seem to be bigger in the US than they are here. http://www.burnsstainless.com/4into1.aspx They are a American Company, and as far as I know they do not have a UK counterpart. Link to comment Share on other sites More sharing options...
CHRIS211083 Posted March 21, 2011 Author Share Posted March 21, 2011 Cheers Phil, ooouch!!! thats £150 plus inport tax and postage. I would say £190 just for the one bit. Will give that a miss i think. Ha Ha. Link to comment Share on other sites More sharing options...
mattius Posted March 21, 2011 Share Posted March 21, 2011 Is the exhaust tested though? there is no way that exhaust you have shown would fit any spitfire i have worked on, unless they have the chassis rails modified or a smaller gearbox bellhousing (which isnt possible). As such that exhaust manifold isnt tested on our actuall cars, and i would hardly call it made by one of the best exhaust manufacturers in the uk that 6cyl manifold that was posted however is beautiful. I look forward with your testing though. Have a chat with meerkat exhausts outside edinburgh, they will make it fit for you. sorry have answered you pm. Link to comment Share on other sites More sharing options...
CHRIS211083 Posted March 21, 2011 Author Share Posted March 21, 2011 Is the exhaust tested though? there is no way that exhaust you have shown would fit any spitfire i have worked on, unless they have the chassis rails modified or a smaller gearbox bellhousing (which isnt possible). As such that exhaust manifold isnt tested on our actuall cars, and i would hardly call it made by one of the best exhaust manufacturers in the uk that 6cyl manifold that was posted however is beautiful. I look forward with your testing though. Have a chat with meerkat exhausts outside edinburgh, they will make it fit for you. sorry have answered you pm. Mattius, i didn't say it was. Go back and read what i've written........ If you pay the £1300+ you get the best. This from GT isn't, its just the best bang per £££. The reason it doesn't fit is a simple error in welding it. I could get it fixed but its not about that its about making sure every one else doesn't have the same problems i do. Its a £600 exhaust and it will be replaced with another one. If that doesn't fit then the instructions a gave to go back with the first one will allow for the rest to be made correctly. Meaning that eventually ill get one that will fit and so will every one else. Rather than just getting it fixed and not telling the seller were it went wrong. As for testing, GT has dyno'ed this exhaust and his customers have dyno'd it. He says it works, i believe him and soon we will all see. Chris. Link to comment Share on other sites More sharing options...
Hurricane1500 Posted March 22, 2011 Share Posted March 22, 2011 So this is the type of thing you can get for the £200 - £250 I'm fascinated to know how many more BHP you will get from the GT manifold for the additional £350 Chris yours is the 3rd manifold now that I know off that hasn’t fitted! personally think they haven’t been designed to fit the large crank 1300 / 1500 Link to comment Share on other sites More sharing options...
CHRIS211083 Posted March 22, 2011 Author Share Posted March 22, 2011 Hi Hurricane1500, the Figures are 10bhp and 15lb/ft . However this is with GT's head and cam too. So will be interesting to see the difference on a standard head!!! Chris. Link to comment Share on other sites More sharing options...
James Posted March 22, 2011 Share Posted March 22, 2011 I wish people would stop quoting bhp and lbft— there's so much more to it than that. Link to comment Share on other sites More sharing options...
CHRIS211083 Posted March 22, 2011 Author Share Posted March 22, 2011 By the way thats in comparison to the maniflow manifold on the same engine. etc. James Don't lie you LOVE IT!!!!! Ha Ha. Chris. Link to comment Share on other sites More sharing options...
James Posted March 22, 2011 Share Posted March 22, 2011 It's honestly meaningless Chris. Like I said before, it's a road car, not a race car- you can't win anything! I decided a while ago that it's about efficient money being spent on something decent and drivable. If it's good to drive, it's good to drive. Once I have sorted the head for my engine it will be fantastic- I'll be sticking it on the rollers but that's just to tune it. I already know it goes like stink. I really enjoy reading up about all this- but does it really make any difference that a head might flow 5% more? can you actually feel that? I know you can't. Link to comment Share on other sites More sharing options...
CHRIS211083 Posted March 22, 2011 Author Share Posted March 22, 2011 Hi James that isn't peak hp. Its what's gained right across the range i.e. the drivable area. The torque is the big surprise with this as it increases much longer to higher rev's so it will pull like a train. Top end hp is good but no its not a race car. Looking forward to the results. Chris. Link to comment Share on other sites More sharing options...
GHR630 Posted March 22, 2011 Share Posted March 22, 2011 I'm with James here. My engine was built by me to my specification (gleaned from reading everybody not just GT, KK or Vizard etc). Machining done in several different shops, again to my spec. Balancing by me. Cylinder head is my own doing as well. I think this year I might put it on a RR to see what I've got, but I keep saying that and never do. How good is it? Dunno, the driver is lacking talent but it still gives me a good ride up the hills and has embarrassed some better machinery in the past (most notable a Dino at Longleat Hill Climb a few years ago on the old engine). Would it be any quicker if I had taken the cheque approach and paid the "experts"? Again, dunno, probably - but by how much?? In the back window I have a sticker that some of my fellow competitor covet, it says simpy "Built no Bought!!" You pays yer money .......... Link to comment Share on other sites More sharing options...
CHRIS211083 Posted March 22, 2011 Author Share Posted March 22, 2011 Hi GHR630, Im a Mechanic so building a standard engine which runs nice is not a problem. However ive not time as im in training for the Olympic games so have very little time free. That and ive not worked on getting power out of these engines so really i don't have much choice. However GT is only supplying the cam, head and exhaust manifold. The engine was stripped, cleaned, re bored, lightened, balanced, crank ground and has a tr5 profile cam with duplex cam chain kit. This was done by chic doig my local specialist while i was recovering from surgery. End of the day i want to get in and go. Im no racer i just like to drive. Ill also be converting it to EFI with special Throttle body's as i know how much better EFI works. I'll also be fitting these parts and the EFI so it will still be mine but with GT's parts i know ill be happy with it. As for time am in no rush. Either way no matter what anyone thinks all will come clean on the dyno, rock on next month. Chris. Link to comment Share on other sites More sharing options...
GHR630 Posted March 23, 2011 Share Posted March 23, 2011 Good on yer! Oh and keep us posted on your Olympics progress!!!! Link to comment Share on other sites More sharing options...
CHRIS211083 Posted March 23, 2011 Author Share Posted March 23, 2011 Well ill be Fighting the European Champs end of April. Wish me luck. Here's a link to me fighting in Madrid. http://www.youtube.com/watch?v=Z3NwxfqAJbM Im the one in White. Chris. Link to comment Share on other sites More sharing options...
Dicky Blighter Posted March 23, 2011 Share Posted March 23, 2011 Hadn't realised just how big your opponent was until he walked past the ref. Good luck with your competitions, I know how much training that takes as one of my sisters does some sort of ninja stuff to. Link to comment Share on other sites More sharing options...
thebrookster Posted March 23, 2011 Share Posted March 23, 2011 Hadn't realised just how big your opponent was until he walked past the ref. Good luck with your competitions, I know how much training that takes as one of my sisters does some sort of ninja stuff to. WHAT!!!!!!! I need to see this video now, cause I have seen the size of Chris (he could well have auditioned as the part of Hagrid in the Harry Potter movies with no need for cgi to make him look bigger) and that seems to suggest the opponent is bigger!! Help us all. Link to comment Share on other sites More sharing options...
CHRIS211083 Posted March 24, 2011 Author Share Posted March 24, 2011 Im 6'5 and 21 stone......... Yep im small for the category. Chris. Link to comment Share on other sites More sharing options...
CHRIS211083 Posted March 24, 2011 Author Share Posted March 24, 2011 Paris: Czech Republic Note the legendary Neil Adams Olympic Silver medallist on the far right. Chris. Link to comment Share on other sites More sharing options...
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