16v205 9 Posted July 7, 2006 Hi My gti-6 engines been built for a week, and has been timed up on original timing marks. I now need to set the cam timing as close as possible to whats recommended but im struggling to find a dti gauge that will reach the top of the tappets My dad used to have a set from his engineering years with removable screw-in plungers but we cant find the extension bits anywhere. Ive been looking to try and buy a new dti with a long reach on it but ive yet to find anything suitable, most only have the normal length reach. I tried using a small magnetic rod, but theres so little room everything ive tried gets knocked by the cam. Anyone know where to buy one online? Ive been around the local factors and engineering supplies but nothings come up yet. I dont want to end up sellotaping a bit of old nail on the end of the dti Rich Share this post Link to post Share on other sites
sonofsam 5 Posted July 7, 2006 Found a long reach one @ www.chronos.ltd.uk, good price too Share this post Link to post Share on other sites
16v205 9 Posted July 7, 2006 (edited) Thanks very much, ill measure the length tonight that I need as I cant remember it off the top of my head, think its 50mm probe depth though which makes that ideal Rich Edited July 7, 2006 by 16v205 Share this post Link to post Share on other sites
sonofsam 5 Posted July 7, 2006 No worrys Rich glad i could help. Sam. Share this post Link to post Share on other sites
PumaRacing 2 Posted July 7, 2006 Most DTI's have an industry standard 2.5mm thread for the plunger end fitments. You can extension rods for these. The Moore & Wright 30mm extension is part number DIS-821X and costs the princely sum of £2.55. You can also screw more than one of these together of course as each has a male thread at one end and a female at the other. Just unscrew the ball bearing from the plunger, add extension pieces as required and fit the ball bearing back on the bottom of the extension piece. Personally I've always found that a standard reach DTI is long enough for setting cam timing up anyway though. Share this post Link to post Share on other sites
midnight motorsport 0 Posted July 7, 2006 Most DTI's have an industry standard 2.5mm thread for the plunger end fitments. You can extension rods for these. The Moore & Wright 30mm extension is part number DIS-821X and costs the princely sum of £2.55. You can also screw more than one of these together of course as each has a male thread at one end and a female at the other. Just unscrew the ball bearing from the plunger, add extension pieces as required and fit the ball bearing back on the bottom of the extension piece. Personally I've always found that a standard reach DTI is long enough for setting cam timing up anyway though. hi dave, i am sorry to contact you through this web site, but you are a hard man to get hold of!! i take it you are very busy, but would like to just ask if and when? you are taking on work? as i would like a big valve mi16 head built for my supercharged mi, i want good flow, low boost, and keep mild (standard duration cams), can you help? many thanks, Share this post Link to post Share on other sites
PumaRacing 2 Posted July 10, 2006 Hard to say when I'm taking on work. Theoretically, if I accept it all, I have enough proposed orders from existing customers to last me the rest of the year. I may farm some out though to take on other stuff in September ish. Best way is watch the website. I'll say on there when the order book is going to reopen. Share this post Link to post Share on other sites
midnight motorsport 0 Posted July 11, 2006 Hard to say when I'm taking on work. Theoretically, if I accept it all, I have enough proposed orders from existing customers to last me the rest of the year. I may farm some out though to take on other stuff in September ish. Best way is watch the website. I'll say on there when the order book is going to reopen. Hi David, thanks for the reply, i will keep an eye on the web site, just a quick one, i have mixed opinions about this big valve head, not that it does,nt make more power, as i know it does, But wheather it will make my engine do what i want? basicly i am supercharging my mi16, only want to run about 10 psi of boost, and only intend on revving it to 7000-7500, as on standard L&B crank, c.r 9.5-1, and was wondering if increasing the valve area would push my maximum power further up the rev range? (as in a natrualy asp eng) or would an increase of valve area, + standard cams, with the low duration, keep rev range the same? and just help it to have more power? as i understand the more flow in bosted engines still has a good affect on power, but will it be wasted as i cant rev it safley to make that power? what are your thoughts? Share this post Link to post Share on other sites
PumaRacing 2 Posted July 11, 2006 Forced induction engines only rev to about the same rpm as N/A engines of the same spec. The turbo/supercharger doesn't add revs, just volumetric efficiency. So a low compression Mi16 on standard cams isn't going to rev that high anyway. Maybe 6.5k to 7k. The BV head will add a few hundred rpm but nothing that will exceed your rpm limit. It will probably add 40/50 bhp at the same boost level though. I'm almost out of the big valves but I'll put a set aside for you. I doubt if demand makes it worth having another batch made so when the last 4 sets are gone that's it. Share this post Link to post Share on other sites
engine killer 6 Posted July 11, 2006 I'm almost out of the big valves but I'll put a set aside for you. I doubt if demand makes it worth having another batch made so when the last 4 sets are gone that's it. i am sorry stealing this thread to contact you too, david. i am still waiting to hear from you to reopen your order book. still want to send you a Mi head for BV operation, of course if you can source me a Mi head from UK it will save me one way shipping cost too. since you are saying your orders will last you the rest of year, i am thinking of getting the big valves from you and get it done here in Hong Kong. the engine tuner here i am using has been working for a race team for quite some years with proven records. they do all the engine works themselves but i guess they haven't tried any BV before since race regulation is not allowed. may still go for a try, do you provide well cut valve seats too? thanks. Share this post Link to post Share on other sites
petert 601 Posted July 11, 2006 I've got some very nice competition valves if other sources run dry. They're probably very good value for money given the current value of the AUS$. Share this post Link to post Share on other sites
midnight motorsport 0 Posted July 11, 2006 (edited) Forced induction engines only rev to about the same rpm as N/A engines of the same spec. The turbo/supercharger doesn't add revs, just volumetric efficiency. So a low compression Mi16 on standard cams isn't going to rev that high anyway. Maybe 6.5k to 7k. The BV head will add a few hundred rpm but nothing that will exceed your rpm limit. It will probably add 40/50 bhp at the same boost level though. I'm almost out of the big valves but I'll put a set aside for you. I doubt if demand makes it worth having another batch made so when the last 4 sets are gone that's it. hi david, that is the sort of conclution i was coming too, im glad you have just confirmed it for me, ok right, so you only have 4 sets left, so if i buy a set now, and wait till you can do the head? i dont want to miss out, how can i contact you about getting a set? and paying for them? many thanks, Edited July 11, 2006 by midnight motorsport Share this post Link to post Share on other sites
Cameron 16 Posted July 12, 2006 Back on the DTI thing.. I used a small threaded bolt, removed the head and then filed the end round, then put a small nut on to lock it in place on the dti. Works fine for me Share this post Link to post Share on other sites
Rob Thomson 6 Posted July 20, 2006 And Dave, will you build me a top-spec 1294cc 106 Rallye engine at some point, please? I'll keep an eye on the website.... Share this post Link to post Share on other sites
