xmoht Posted June 22, 2010 Report Posted June 22, 2010 So I'm in the market for a carb upgrade. I've been in discussion via PM with a few members who have been exceptionally helpful. I was watching a set of Webers on eBay which have since skyrocketed in price. I'm currently looking at a pair of Dellortos, but they're off a 2ltr Alfa which means emissions. The book about rebuilding and tuning Webers and Dellortos basically just says, avoid them and buy what they call "Universal" carbs. Is there a way around the emissions gear without hacking it to death or should I just keep my eyes open for something more inline with what I need? Quote
Felix Posted June 22, 2010 Report Posted June 22, 2010 Is it a saturday night special/weekend racer or a daily driver? If it is a daily you'd be better of with an appropriately sized downdraft weber. Quote
xmoht Posted June 22, 2010 Author Report Posted June 22, 2010 Is it a saturday night special/weekend racer or a daily driver? If it is a daily you'd be better of with an appropriately sized downdraft weber. Yeah daily but I want to get as much power out of it as I can so I plan on going twin sidedrafts (among other things). Lots of things in the boiler for the engine but obviously new carb is the first on the list really. Quote
altezzaclub Posted June 22, 2010 Report Posted June 22, 2010 Not worth trying motorbike quads? Its been done nicely a couple of times so there are people to ask, it just needs the four manifold pipes making up. Other than that, I'm a Weber man myself but damm they're expensive! In NZ and South Africa you could get more parts for them, jets and choke and things. hence I'm on SUs... Quote
Felix Posted June 22, 2010 Report Posted June 22, 2010 so what is under the bonnet so far? motor? what car? Quote
xmoht Posted June 22, 2010 Author Report Posted June 22, 2010 I've never heard of using motorcycle quads I'll have to do some research. Currently it's your block stock KE70, but I'm searching for the 5K. When I get the 5K obviously before deciding exactly how to go about it I'll give it a thorough pull down and inspection. Plans for the 5K are: - Twin Sidedraft Carbs - Extractors - Block and valves machined, O rings in the head (once I have done all the reading and calculating on what exactly I need) - New cam (again once I have figured out exactly how I need them done for my setup) - New pistons and rings - Upright motor for better use of engine bay - Super charger install That's just a basic run down of what I want to do, and only in a general order of how I'll do it. Planning is being done around the idea of using a SC, so a few things like the carb I can utilise early on but of course other things will take a lot more planning before implementing. Quote
Felix Posted June 22, 2010 Report Posted June 22, 2010 Well if you plan to supercharge it then I wouldn't worry to much about the twin sidedrafts or uprighting the motor. Uprighting is all about having a straighter intake path for a full bore NA motor, or as some people do, for more room on the manifold side for a turbo. Seeing as you are going the supercharged route, most people mount them on the dizzy side of the motor on a modded air con bracket. Would be way easier to mod a single downdraft weber to take boost, than a set of sidedrafts. Quote
altezzaclub Posted June 22, 2010 Report Posted June 22, 2010 Supercharger would mean one big carb, so you'll have to decide before you start which way you're going to go. http://www.club-k.co.nz/Forums/viewthread.php?tid=14837 Quote
xmoht Posted June 22, 2010 Author Report Posted June 22, 2010 (edited) Supercharger would mean one big carb, so you'll have to decide before you start which way you're going to go. Complete re-edit: I can run more than one carb with the supercharger, don't understand this comment unless it's like Felix recommending that it would simply be a lot easier to have a single downdraft carb. Obviously a compromise between cost/simplicity and performance is a must in order for me to be able to do it. Edited June 22, 2010 by xmoht Quote
Toy-Yoda[RL] Posted June 22, 2010 Report Posted June 22, 2010 Maybe I'm missing something here, but you say you want as much (boosted) power as possible and for it to be a daily..... Sooo, what's wrong with EFI? :jamie: Quote
Taz_Rx Posted June 23, 2010 Report Posted June 23, 2010 (edited) Probably the cost Ben. I agree with Felix. If you want to boost it later, and are happy to go blow-through, just get a down draft weber. That'll give you pretty good NA performance, then just put a hat on it for some boost and setup to fuel system adequately. You could run twin carbs with the S/C. It'll just be a WHOLE lot harder to tune. As felix also mentioned I don't see any point in uprighting it. I also wouldn't worry about o-ringing the block/head either. Edited June 23, 2010 by Taz_Rx Quote
xmoht Posted June 23, 2010 Author Report Posted June 23, 2010 Thanks for the advice Taz and the PM, very helpful. I've always hated the idea of the EFI system completely covering the engine but I got up to page 20 on Taz's 5KTE last night and noticed he has it mounted on the side so I'll give it more consideration now. Cost is of course a factor but EFI is something I'm considering long term. The books at the library regarding boosting engines are from the early 80s so they don't even make mention of EFI, perhaps I should be looking elsewhere for information :yes: Quote
Taz_Rx Posted June 23, 2010 Report Posted June 23, 2010 (edited) haha you're nearly half way there then. Mines a 7ke manifold. The other ones you've seen that hang over the top of the motor are 4ke manifolds. Edited June 23, 2010 by Taz_Rx Quote
ke70dave Posted June 23, 2010 Report Posted June 23, 2010 Thanks for the advice Taz and the PM, very helpful. I've always hated the idea of the EFI system completely covering the engine but I got up to page 20 on Taz's 5KTE last night and noticed he has it mounted on the side so I'll give it more consideration now. Cost is of course a factor but EFI is something I'm considering long term. The books at the library regarding boosting engines are from the early 80s so they don't even make mention of EFI, perhaps I should be looking elsewhere for information :yes: i would definately look into EFI for any boosted applications. and especially since its your daily, you want to keep it as reliable as possible. (not saying carby's arent reliable, but EFI is just so gooooodd) maybe pick up a cheap 2nd hand ecu, or build yourself a megasquirt. Quote
mighty_4k Posted June 30, 2010 Report Posted June 30, 2010 (edited) I dumbly brought a set of emission Dellortos Dhlas a while ago this was before I knew there was two types of dhlas. Lets just say I wasn't too happy that I learnt about there being two types of dhlas after I brought them and Ive course I had to buy the wrong kind :) Appertaley the problem with emission dhlas is that their harder to tune for smaller engines like ours. Appertaley adding a bigger idle jets gets like 60 or 65s will stop the idle and acceleration problems that emission carbs can cause on smaller engines. I'm still a few weeks away from getting my engine put back together and my carbs put on so I can't tell you how they go unfortunately. Heres a few links that I had bookmarked has some info on dhla emission carbs and probably explains it better than I ever could lol. http://forums.vwvortex.com/showthread.php?4046515 http://szendwich.freeweb.hu/index.php?acti...&what=carb3 Edited June 30, 2010 by mighty_4k Quote
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