personally I think that's the best combination for a perfoming k jet valver,still just about drivable on the road . ive seen a few cars with k jet pull 200 with this set up in the old days , ie ianbs mk2, and trimsport old mk1, out gunned ians car side by side with this cam profile.
thers surprisingly 4 or 5 different head castings , some 027 as the one in your picture has the wide inlet port some of the early tuners like jonjones preferred the narrow ported head , how ever its been proven once ported thers little difference , think it personal choice
Jason reckons a standard 16v head flows enough for 200 bhp When you say 4 or 5 head castings you just mean the different mould numbers on the tops of the 027 heads
dont think so bud. i was told who did the heads for my ibiza and it wasnt mr shed....the name escapes me presently. the brm heads were done by someone else too...
According to Mr shed he does all radicals heads that's what he told me a couple of weeks ago What's a thingy ? You can share with your mates now you've gone hardcore lol
ah i see, sorry, thought you meant the ibiza. cool, thats nice to know. you'll have to ask ian about 'the thing'. i could tell ya. but then i'd have to kill ya....
never had a 16v kjet car. got 180 from a digifant car on a single plenum (brm 180 running a lumenition spark/fuel ecu and old spec low lift shrick 276s and a crap off the shelf 4-branch exhaust manifold). this went to about 217 with the addition of 45 dth tbs. then subsequent engines went up from there. best i ever saw was 257 on pump fuel, but readings can go 10hp either way easy with these engines, even with oil temp fluctuations. i reckon that you need a hike in cr to get to 200 on a 2L without tbs.
yes , they may flow enough air tested on a flow bench to atchieve 200 hp , and I am not going to argue with Jason as he does no his stuff. but thers no way a standard head will do 200 with a cast manifold and k jet. and even if you do every thing you will still need the top secret thingy to make it work.lollollollol
Blast from the past, and makes ref to some good threads: http://www.clubgti.com/showthread.php?172588-Real-power-from-valvers
In addition the link Rob T put up, Here is a more modern link to various 16v cars being tested on our Club GTI National 16v dyno day. Though dyno centers do differ in the size and plot shapes, my references for 16v power and torque shapes come from the 5 years tuning various vehicles, owned by Club members at this place. You are chasing numbers though rather than drive torque and response. Next time I am at a trackday in JENVEE it can be demonstrated what I mean.
More importantly, how quickly the engine can respond to driver input anywhere and up to the maximum torque for a given rpm. As a part time dyno operator myself, WOT plots, though great for selling products and creating a talking point, only give limited information. Yes mapping ( or setting up for carbs and Kjet) along with gearing would be very key to this.
Or racing (getting a to b asap) brings in a whole load more variables..... Rolling roads don't usually do transient response. Get this right and a small engine can feel mega (if its light) Good thread, keep it coming Jon
Transient engine mapping is where most sub 800 quid after market stuff is crude at best, using fuel additions based on throttle rate to compensate for a sudden increase in air demand sending the engine leaner temporarily and leading it a reduction in torque. We can still workaround this though in the main map. OE stuff, based on the expectations placed on it also uses spark advance to increase the transient torque which is more effective which pretty effective when coupled with the warm film model. This is an area were it is best to get the right compromise on road and then you find out how much your engine movement is contributing to the delay in driveline torque! We digress as Mike's engine is good old Kjet!
Wow lol things got a bit techie while I put the kids to bed lol The 200 bhp is an attention grabbing headline to get thread input Real purpose is to get the best from a k-jet setup for a track only car KEEP IT COMING GUYS I THINK ITS GOING WELL
Got the Mk2 Golf GTI Group A manual infront of me and that says 194 PS/ 200Nm from a 1.8L (1781cc) 16V engine - so 191hp/147ftlb in real money. Single plenum. So 200hp from a 2L 'should' be very doable. Not seen it many times though. Whole page of kjet mods though....043 810 004 7 SP - fuel metering unit.....seem to recall a modified 924 turbo item or suchlike????
