p.mole1 Posted February 21, 2017 Author Share Posted February 21, 2017 Hi Nick,The cylinder head has Piper Spring caps and solid followers. My current engine is a 1.4SS wet liner block which I am told is the best version, however it's on standard pistons so I have to keep the revs down. The 280 duration cam is a no go unless I throw caution the wind!I assume the power band in a 1.4 would be over 8000 rpm also the 774 cam only has 9.1mm lift, I think it may have been some sort of Rover homologation cam. I could use my SS cams but they are they are the early ones with the feeble looking 8mm bolts and I was under the assumption that 633/1320 were superior. Ideally I would like to fit throttle bodies,then at later date if I want more power I can just transfer everything over.I do have the 6 speed gearbox which suits this combination. Link to comment Share on other sites More sharing options...
Area Representative Nick Bassett Posted February 21, 2017 Area Representative Share Posted February 21, 2017 I guess it depends on what type of engine you are wanting and for what purpose?I too have a 1.4 fitted with a DVA head, TBs and 1994 spec SS cams (timed with verniers) and find it a very tractable little engine - DVA raised the rev limit to 7800rpm (up from 7600), but I rarely, if ever, go that high, although the car is still pulling strongly well over 7000!If it helps, below are the commonly quoted cams and their respective duration & lift - 633s/1320s are slightly better than SS cams, but I'm not sure how different that actually feels in practice?Type duration liftStock. 248 8.8mmTf135. 252 9.3mmVVC exhaust 252 9.65mmBP270. 260 9.6mmSuperSport 266 9.6mm633. 264 10mm1320. 268 10mm Link to comment Share on other sites More sharing options...
p.mole1 Posted February 21, 2017 Author Share Posted February 21, 2017 Hi Nick,Thanks sounds exactly like what I am trying to create I use the car for the road and odd track day, it was feeling a bit flat however I have been collecting parts and I fitted a set of verniers and and a 4-2-1 exhaust, these made a large improvement. I have a Janspeed cylinder head and have acquired a a M3D K6 ECU. I may as well go for the throttle bodies! Which ever camshaft I use I will have to shim it! bugger. The Janspeed head was a 1.4 motorsport version and has had the tappet oil ways blocked so I will have to use solid followers. Link to comment Share on other sites More sharing options...
Area Representative Richard Price Posted February 21, 2017 Area Representative Share Posted February 21, 2017 I have spec sheets for both 633 and 1320 cams listing 10.03 and 10.9mm of lift respectively.My own experience of a 1600 with 633's, a ported head, plastic plenum, and SS MEMS ECU, was of peak power at just about the 7600 limiter.I've also seen a dyno plot of a similar speced 1600, but with 1320's, which did not look like it had peaked before the limiter (but the 1320's had adversely affected the mid range torque)Therefore, a 1400 with 633's and ported head is likely to produce peak power well over 7600rpm. If you don't want to rev the engine more, you need more CC's..... Link to comment Share on other sites More sharing options...
oilyhands Posted February 21, 2017 Share Posted February 21, 2017 .. Link to comment Share on other sites More sharing options...
oilyhands Posted February 21, 2017 Share Posted February 21, 2017 Why not have the VHPD cams reprofiled to 633 or similar..Oily Link to comment Share on other sites More sharing options...
p.mole1 Posted February 21, 2017 Author Share Posted February 21, 2017 Hi Richard,Thanks , looks like I will use the standard SS cams it's not worth putting stronger pistons in a 1.4 Link to comment Share on other sites More sharing options...
Area Representative Nick Bassett Posted February 22, 2017 Area Representative Share Posted February 22, 2017 p.mole (sorry don't know your name) - you are welcome to try my 1.4 if you want - I'm in Thatcham, Berkshire.I can't remember where I sourced those cam duration & lifts - sorry if some are incorrect. Link to comment Share on other sites More sharing options...
p.mole1 Posted February 22, 2017 Author Share Posted February 22, 2017 Hi Nick,Thanks,unfortunately I'm at the other end of the country. I've ordered the throttle body kit so i will have a few days tinkering ahead.Phil Link to comment Share on other sites More sharing options...
p.mole1 Posted March 11, 2017 Author Share Posted March 11, 2017 Removed my SS camshafts and tried fitting them to my Janspeed head. I have encountered a problem, the Janspeed head came with cams and was correctly shimmed but the SS camshafts have a much larger base circle! So I do not have a clearance to measure as the valve is held open even when the tappet is sitting on the bottom of the base circle. looks like I will need 16 shims but how will I be able to work out the required clearance, am I missing something? Link to comment Share on other sites More sharing options...
p.mole1 Posted March 11, 2017 Author Share Posted March 11, 2017 Does anyone know where I could buy a shim kit I could do with a selection of of 10 mm shims Link to comment Share on other sites More sharing options...
p.mole1 Posted March 11, 2017 Author Share Posted March 11, 2017 Found a shim kit KTM bikes ise 10 mm shims Link to comment Share on other sites More sharing options...
oilyhands Posted March 11, 2017 Share Posted March 11, 2017 If it helps i keep the shims in stock between 100 thou and 160 thou in n5 thou increments.Oily Link to comment Share on other sites More sharing options...
p.mole1 Posted March 12, 2017 Author Share Posted March 12, 2017 Hi Oily, I will be in touch, I needed to buy a selection of shims to measure my required clearances.I tried measuring the clearance without a shim in place but found I couldn't do it with any great accuracy as i had to use a whole selection of feeler gauges to judge the gap and I don't have any access to slip gauges. I will use the kit to work out what I need. Link to comment Share on other sites More sharing options...
oilyhands Posted March 12, 2017 Share Posted March 12, 2017 Measure the base circles of the two cams (old regrind and new) , divide the difference by two and add it to the existing shim thicknesses, this will get you very close..Oily Link to comment Share on other sites More sharing options...
oilyhands Posted March 12, 2017 Share Posted March 12, 2017 Measure the base circles of the two cams (old regrind and new) , divide the difference by two and add it to the existing shim thicknesses, this will get you very close..Oily Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now