My Engine Spec is as follows: 2.0 16V, 9A, KR cams, TSR Pack A Head, TSR Exhaust Manifold, Large Ported Inlet Manifold, K&N, Jetex Exhaust System. Debate: I know there has been alot said recently obout GVK's problems with 268/276 cams. Does anyone have any rolling road/dyno plots of any engines with 268/276 or 276/276 Cams - Barny, Matt D??? I'm really after info of where and what the engine would make peak Torque and Power and just as importantly what the shape of the torque/Power plot looks like. I am really trying to decide which road to go down. Cheers in advance. BTW my current plot is a very nice shape - both power and torque. Makes 155.2 lb ft Torque and 180 BHP (@ Stealth when 24 degrees) currently.
do a search matey all the stuff is on here soemwhere Also check gvk's web page think there plots an stuff on there
Cheers mate, Looked on GVK's website and 268/276's look like the best route for me as at the moment its got to be good as a daily driver and as a track car 1/2 times a month?
speak to gvk - he tried the 276/268 route and it can and does produce a good all round package ... but ... not always as easy
As said in that mammoth thread, I too saw the plots from Matt and Ians car and shelled out the cash for the Schrick 268/276 - Sadly I didn't get the results I was hoping for [:^(] Yes, there might be other parts/knowledge required to get these results but I didn't have the time or money to find out TBH. Up to you really.
Nurburgring You've probably seen Gary's web site and it gives good overlays of power and torque graphs btween mine MattD's and Gary's etc. The subject has been debated alot on here. As Gary said his car missing a few essential parts to give it the edge but essentially his set up was very good before the head and cams went on. This cam combination was initially experimented in the States by some guru and although nothing radical it seemed to produce good results over there. I was initially going for straight 276's. I tried them in mine after getting them from Badger 5. Although my car posted good power consistently I also found the power to be linear and torque was excellent throughout the rev range. My car's figures have now been bettered in other people's cars using these cams. What you will need is a 50mm inlet manifold a good 2.5 inch exhaust mated to the manifold and expert set up using a Vernier Pulley. It will be useful for you to get your fuelling checked by Stealth or TSR and get the WUR mod done as that also benefitted my car. If you have an alarm consider it doesn't impinge on the fuel delivery from the pump where voltage drops are common...also check the lift pump still works. I've got to start again with the MKIV but I am carefully considering it as a road car foremost so I won't be going for big power. I hope for 250-280hp using either an IHI or modded APR K04 using a hybrid manifold then using a diff on the standard box. Should be just about enough for the odd trackday Ian
There are also some fruity cams available >> CatCams Split durations, split the other way. partnr. duration duration maximum lift lift at TDC parts application [data link] [0.1mm+cl] [1.0mm+cl] [cl=0] [cl=0] [-] [-] 7661202 250 / 257 211 / 219 9.55 / 10.15mm 0.55 / 0.95mm O.E.M. HYDR: O.E.M. 7661207 260 / 260 219 / 219 11.20 / 11.20mm 0.90 / 1.00mm O.E.M. HYDR: sport 7661206 260 / 260 224 / 219 11.60 / 11.20mm 1.25 / 1.00mm O.E.M. HYDR: sport 7661210 265 / 262 227 / 228 10.90 / 10.90mm 1.35 / 1.30mm O.E.M. HYDR: sport 7661215 283 / 267 246 / 232 11.50 / 11.45mm 2.55 / 1.70mm O.E.M. HYDR: sport 7661235 275 / 275 236 / 236 11.15 / 11.15mm 1.95 / 1.85mm O.E.M. HYDR: rally & cross 7661221 283 / 279 246 / 242 11.50 / 11.50mm 2.85 / 2.55mm O.E.M. HYDR: rally & cross 7671125 270 / 270 241 / 241 12.00 / 12.00mm 2.85 / 2.95mm custom MECH: rally & cross 7671149 287 / 279 260 / 252 12.50 / 11.95mm 4.05 / 3.55mm custom MECH: rally & cross 7671157 282 / 270 254 / 241 13.20 / 12.00mm 4.05 / 3.20mm custom MECH: rally & race 7671111 282 / 282 254 / 254 13.20 / 13.20mm 4.05 / 4.05mm custom MECH: rally & race 7671167 288 / 280 261 / 253 13.95 / 13.20mm 4.60 / 4.15mm custom MECH: rally & race 7671150 312 / 303 276 / 266 13.60 / 12.95mm 5.45 / 4.85mm custom MECH: rally & race 7671148 306 / 298 277 / 270 13.60 / 13.00mm 6.15 / 5.50mm custom MECH: rally & race custom grinds are available on request Edited by: badger-bill
Lots of interesting cam specs there from cat cams, i've seen some of their billet cams and they are pretty nice looking Ian, your cars figures may have been bettered but it's not by a great deal is it ? Dad said he enjoyed driving your car the other night, he commented that it was one of the nicest Golfs he's ever driven
Something that hasn't been mentioned is compression ratio. Going back a few years me and a friend both had 2 litre 16v motors: 9A block, early head ported by same people, 276 Schrick cams,BRM 4-1, Jetex rally 2 1/2" system, twin 45's. His had standard pistons, mine had forged JE's with 11.8:1 CR. HUGE difference. More power and torque everywhere and nothing like as peaky. On the rollers it made 18bhp more. Another friend had the same motor (std pistons) with 268 cams and that was actually peakier than the 276 cammed motor. No experience of the combo.
You'd have probably made more if you got it to more like 11:1 if you were using pump fuel, as you wouldn't have to retard ignition so much.
Interesting info re custom pistons...not that's debated very often. MadMK4.........glad to see your dad liked driving my car...but...who said he could drive it though...I didn't !! I'll speaking Ian
Cheers for the info guys. Ian - Have got a 50mm inlet manifold and WUR Mod done. I think i do need to get the section of exhaust pipe between the end of the TSR 4 branch manifold and the front box increased to 2 1/2 as at he moment its a restriction. The exhaust is a Jetex 2 1/2" by the way. Thanks Ian. Bill - Thanks for the possible cam profiles. Definately worth looking into for developing my engine, cheers. Oh yeah thought i'd add my current dyno plots (JPEG Images) of my engine for you to view/make comments - but don't know how to do it? Do i have to put it on a web page? Cheers for your help so far and sorry to repeat a topic of debate.
Nurburgring Yes mine has a flowed/polished 50mm inlet manifold and it has had the WUR completed I have a Remus 2.5 exhaust which fits really well straight onto a the TSR/Magnex manifold. Lots of choice with those cams Bill Ian
Well assuming Ian gets back from checking his cars not been nicked! As you know im more than chuffed with my JE HC jobbies, tho im on stock cams & clearance wise they 'may' restrict lairy cam use, so would need to get that checked out. A 9a block, flowed head, 268/276, & HC pistons, big inlet/ exhaust & proper set up 'could' produce a lovely combination, but then again who knows? may need TBs or at the least- a piggyback unichip to allow correct fueling tho. Defo as standard K jet fueling it has to be set up to run cooler water/oil temps anyway. Hasnt RobT got HC pistons in his ibiza tho?
id go nuts if i found out someone had been driving my car without my consent!! 268 /276`s are a very good combination retaining torque and increasing peak power, best bet on a 2 litre though, those of you concideing them for a 1.8 may not get such pleasant results, These cams need as mentioned a flowed head,large inlet manifold, 4 branch and a 60mm exhaust to work properly, plus adequate fuelling set up to match,,,
Well there is nothing wrong with the torque figure... From the top of my head most of the "tuned" 2L valvers make between 150-160lbs/ft peak @ Stealth.. Maybe a smidge more top end is available from cams/higher C.R? Im assuming the fuelling/ignition has been set up by Vince as you have Stealth figures... Happy enough with my car now ive tweaked the cam timing & have got it revving cleanly to 7600 for track work..
Hmm we may actually have the same pistons then, as mine= same bore diam as 2.0l so they should fit & mine 12.somat :1 area also. Did you run the lairy cams (276/276?) with the HC pistons on K-jet at all? Cheers Edited by: iguana
