Carbs on a 1.4SR Nova...
My mates after some second hand twin 40's for his Nova 1.4 SR. What are good ones to go for, whats envolved in setting them up and what power gains are to be expected?
will twin 40's not be too big for a 1.4?!
webers and dellortos (sp.?) are a good choice
if its already got a carb fitted to it then its an easy job to fit them. if its injection, then it'll be a fair bit more tricky.
sorry, not too hot on nova's.
* pair of Weber DCOE 40s
* inlet manifold with "cathedral" rectangular ports
*uprated fuel pump (ask your local auto factors for VX fuel pumps with 8mm inlet and 8mm outlet, std is 8mm in and 6mm out I think)
* fuel pressure regulator, I think www.raldes.co.uk will supply these
* a throttle linkage, www.raldes.co.uk again, or demon tweeks if you're flushed with cash
* alternator lowering bracket, which you can make with some mild steel and a drill just to drop it out of the way
* a choke cable, again from local auto factors
* a run to your nearest weber approved rolling road (e.g. EFI in Gosport) to get it running properly
then you're mate will be a member of the exclusive multi-throttle club!
When they're setup correctly, expect gains of about 10-15bhp
i have a 1.4 inlet manifold for sale!!!
by the way u dont need choke cable!!!! why use the choke? i never do just hold throttle for no more than 30 secs and it runs! oh and i have a 285 cam!!! with idle around 1000 rpm
Any idea what sort of money I'll be looking at for a full set up of twin 40's on a SR Nova 1.4 (carb not injection)? All new and all second hand minus the fitting?
twin 40s on 1.4sr +1.3sr flowed head +kent cam +ashley exhaust manifold =102bhp 90lbft
How come the other guy hit 120Bhp with 40's and cams? 90Bhp ATW's
i did think mine was going 2b 110-120bhp,til i got it rolling roaded after it was set uo
the nova sport was 90bhp, so i gained 10bhp or so from 100cc and an exhaust manifold, which i think is quite reasonable
not sayin that other guys isnt 120bhp, but if you hav a car set up on a rolling road and there isnt much of a power gain, the rolling road guys can change the load setting of the rollers which gives false power reading and may make you more willing 2 shed out £100+ for 2hrs on the rollers
easy way of checking: torque curve should cross bhp curve @5252rpm
Originally posted by tom carrington twin 40s on 1.4sr +1.3sr flowed head +kent cam +ashley exhaust manifold =102bhp 90lbft
DONT KNOW ABOUT THAT BUT MINE ONLY HAD 32/34 DMTL, PORTED 1.3 SR HEAD (SKIMMED 1MM OFF) AND THAT MADE JUST OVER 100Bhp ON THREE RUNS.
went 2another rolling road this morning.
this one read my car as 128bhp and 113lbft
shows what a rolling road can tell u!