In this months golf+ or performance VW not sure which, there is a guy with a mk1 gti witha 1781cc 8v engine running a 306 degree cam. what would the benefits be of such a lairy cam??? would the power band be further up the rev range, what about the idling
Power band would be very high up. You would need to uprate all the bolts, have special solid lifters, uprated springs and retainers. i.e a lot of work.
Sh1t idle....Flat as a fart til about 4Krevs then it would go like a rocket til 7.5K... Totally unsuitable for road use & you would need a race head/strengthened bottom end to sustain them revs... Edited by: chrismc
306 deg cam? ive got a schrick 304 deg in my x-flow head! cant wait till i have the throttle bodies and management to fit it all!
304 deg in a race/track car with carbs or throttle bodies, lots of strong bits in the engine and management maybe. Definatly no on on normal k-jet or digifant for road use. 276 deg is about the limit. Edited by: philip walker
My MK1 has a 288 deg on K-Jet with the only extra fuelling being a 5 cylinder warm-up regulator and runs fine. I wouldn't want to go any more than the 288, 300 would definately be too much for a standard setup.
Assuming a 288 on K-Jet is a solid lifter cam....in which case it is equivalent to a 270-276 hyd cam.. I believe a GS2 Kent is a 290deg duration in Solid lifter form but only 270deg duration on the GS2H hyd. version... Oakgreen88s car is a 2L (or soon will be ) hence it can manage a hotter cam, without comprimising low down torque too much...& the TBs will allow it to rev out & make strong power at the top!!
it's more about the management, with a full ecu like DTA etc you can regain a lot of torque low down, but on carbs or k-jet it'll be a bag of poo
Er..I've got a GS3 cam in a mk1 1.6, 300 degrees according to Kent. Idle is rough but kinda cool in a Mustang V8 sort of way. Perfectly acceptable performance up to about 4.5k, then all hell breaks loose..... Big smiles Some of you may recognise it -
How do you figure that? You are correct that my car has a solid lifter head. My brother also has a 288 but his is hydro and works fine. How is a solid 288 eqivalent to a 276 hydro?
As in Kent cams offer a GS2 & GS2H....both quoting a usable power band from 2000-6500rpm i.e similar characteristics...but one solid the other hyd The GS2 has a duration of 290 & lift of 10.94mm whereas the GS2H has a duration of 270 & 11.32mm lift The solid lifter cams have much bigger lobes than a hyd cam, so im guessing the difference is in the head design...
The heads are very similar. I think you are getting confused by the marketing of Kent's cams. A 288 deg cam means that it is a 288 deg cam regardless of whether it is a solid or hydro head. Anyway, back to topic. A 300+ deg cam is going to be a nightmare for street use. For track use it may be beneficial with decent fueling and a motor built for high rpms.
I understand what you are saying.... Not forgetting that a cam has lift as well as duration though, Nickvw has a Kent GS2 Solid lifter cam which on paper looks quite hot....290 duration (10.94mm lift) but is actually milder than my Schrick 276 hyd cam...276 duration & 11.5mm lift The duration doesnt always tell the story..
