BenH_Ke70 Posted January 23, 2012 Report Share Posted January 23, 2012 my 38 dcoe sideraft carbs :) would it be worth putting them on a stock 4k with a set of extractors? better throttle response or power increase? I am pretty sure they were set up for a ford Kent motor 1600cc specs: 30mm venturis F11 Emulsion Tubes 180 air correction jets 140 main jets 45 f23 idle jets Just looking for a little feedback, maybe someone who has a similiar setup could shed some light, I'm kinda thinking that unless I modify my engine i probably wont gain much at all.. might just save these for another project.. Quote Link to comment Share on other sites More sharing options...
altezzaclub Posted January 23, 2012 Report Share Posted January 23, 2012 well.. four 30mm venturis opening at once into an engine that usually has one 27mm or so... It will drown! I expect you would have to choke it down and re-jet it, and it would be a lot better... it would need a head porting job, upping the compression and certainly a hot cam to match those carbs and get some great gains. Give it a try, you should see it improve the moment you fit them, and we would love to know just how much the 4K is held back by the carb. Quote Link to comment Share on other sites More sharing options...
BenH_Ke70 Posted January 23, 2012 Author Report Share Posted January 23, 2012 hmm, might end up spending more on the 4k than i planned.. to be honest i want a 4age lol, but i want more out of my 4k in the meantime. thus my reasoning for carbies, but if i have to build up the 4k to use them then i will just save m oney for 4age haha.. Thanks altezza, put it simply the car will drown with all that extra fuel of the webers. Quote Link to comment Share on other sites More sharing options...
philbey Posted January 23, 2012 Report Share Posted January 23, 2012 They'll run like shit and just consume fuel without fitting a decent cam and a set of extractors. But they will be loud and all your mates will think it sounds fast! Quote Link to comment Share on other sites More sharing options...
snot35 Posted January 23, 2012 Report Share Posted January 23, 2012 Yeah, you'll have to spend a bit jetting those. Chokes are too big as are the jets and emulsion tubes. It might be worth getting a quote for tuning them before completely giving up though. It's still going to be less complex and probably cheaper putting them on than a 4AGE conversion Quote Link to comment Share on other sites More sharing options...
altezzaclub Posted January 23, 2012 Report Share Posted January 23, 2012 this is still a big factor too!! :laff: But they will be loud and all your mates will think it sounds fast! Quote Link to comment Share on other sites More sharing options...
BenH_Ke70 Posted January 24, 2012 Author Report Share Posted January 24, 2012 hahah don't all ke70's with modified/cut off exhausts sound fast :P this is another option :P My link Quote Link to comment Share on other sites More sharing options...
ke70dave Posted January 24, 2012 Report Share Posted January 24, 2012 hah 7ac! just spent a good 15mins researching the idea.. very interseting. i wonder why people havent done that before (well on the forums anyway...) http://forums.club4ag.com/zeropost?cmd=tshow&id=42373 this guy mentions what timing belt to use and everything. looks like a bolt up affair appart from that small water pipe mod and the water pump. Quote Link to comment Share on other sites More sharing options...
BenH_Ke70 Posted January 24, 2012 Author Report Share Posted January 24, 2012 yeh seems fairly straight forward.. soo for ke70 would need ae71/ae86 crossmember and engine mounts? t50 gearbox, 7afe or 4k flywheel and clutch, tailshaft shortened? and wouldn't have to touch the loom, bolt on the webers, laughin Quote Link to comment Share on other sites More sharing options...
ke70dave Posted January 24, 2012 Report Share Posted January 24, 2012 yeah ke70 bit of effort. have a read about the 7age conversion, that should tell you what clutch you need. AE71 xmember, engine and gearbox t50 gbox hyraulic clutch setup... ae71 tailshaft.. getting expensive.... 7ac really only makes sense in a ae71 or ae86...as its got all that stuff already. Quote Link to comment Share on other sites More sharing options...
BenH_Ke70 Posted January 24, 2012 Author Report Share Posted January 24, 2012 hmm, well if i managed to get a hold of an ae71 wreck.. no idea how hard they are to find... I reckon it would be worth it, it's one step up from a 4k and its easier/cheaper than a 7age and then its halfway there anyway, thrash it around for a while and save up for 7age build :) Quote Link to comment Share on other sites More sharing options...
bAKER Posted January 24, 2012 Report Share Posted January 24, 2012 wouldn't a 4ag head be better? just run it on carbs? Quote Link to comment Share on other sites More sharing options...
BenH_Ke70 Posted January 24, 2012 Author Report Share Posted January 24, 2012 yes a 4age head would make a fair bit more power, the advantage of using the 4ac head is its cheaper and also less mucking around with electrics as you would be able to run it all with standard loom. although 4age head and carbs just running on dizzy with locked out timing wouldn't be too much of a hassle. I've been reading up on megajolt junior ignition system, seems to be the go for running carbs without a dizzy. Not too expensive, and you can fully program ignition curve, vaccumm advance and some other stuff. makes it a bit easier to tune Quote Link to comment Share on other sites More sharing options...
bAKER Posted January 28, 2012 Report Share Posted January 28, 2012 yes a 4age head would make a fair bit more power, the advantage of using the 4ac head is its cheaper and also less mucking around with electrics as you would be able to run it all with standard loom. although 4age head and carbs just running on dizzy with locked out timing wouldn't be too much of a hassle. I've been reading up on megajolt junior ignition system, seems to be the go for running carbs without a dizzy. Not too expensive, and you can fully program ignition curve, vaccumm advance and some other stuff. makes it a bit easier to tune I built a 4age on twin dellorto dhla40s. I've done the Silicone Chip ignition timing computer (Basically the same thing), and it was a major headache. Unless you REALLY know your electronics, I wouldn't recommend it. Also, you have to program each MAP position individually, all 250 of them. I ended up opting for a custom built distributor with a matching custom timing computer. If I was to do it again, I'd go with ITBS, and injectors. Goodluck with the build. Quote Link to comment Share on other sites More sharing options...
BenH_Ke70 Posted January 31, 2012 Author Report Share Posted January 31, 2012 I built a 4age on twin dellorto dhla40s.I've done the Silicone Chip ignition timing computer (Basically the same thing), and it was a major headache. Unless you REALLY know your electronics, I wouldn't recommend it. Also, you have to program each MAP position individually, all 250 of them. I ended up opting for a custom built distributor with a matching custom timing computer. what ignition did you use exactly? if you don't mind me asking. Did you use a crank angle sensor for timing?, i don't understand why you would have to program the map positions seperately, did you run a vaccum line from the manifold with a resivoir (spelling) to equalize the vaccum reading? Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.