Using Too Much Petrol?
#1
Posted 01 January 2008 - 06:19 PM
In the other thread people said they were getting 200+ per tank
I can't find any petrol leaks. I think the mixture is set correctly.
Anyone got any suggestions of what else it could be?
Its a 998 engine with stage one kit and a high lift cam (not sure on profile). Think the carb is a HIF38? Got a straight through exhaust, 1.75" diameter.
Please no comments about lead foot syndrome as I don't drive like a complete
#2
Posted 01 January 2008 - 06:30 PM
#3
Posted 01 January 2008 - 06:32 PM
#4
Posted 01 January 2008 - 06:33 PM
Its not a stupidly hairy cam, think the profile is 731 (that make any sense?). not driving with the brakes on, air filter isnt clogged. Not sure on teh engine tune.Hairy cams cost mpg. Driving with the brakes on, clogged air filter, bad engine tune....
Its a recently re-built engine reground crank, new bearings, new piston rings etc.
Cheers
Dan
#5
Posted 01 January 2008 - 06:41 PM
did you do yourself?
you really need a r/r session, needle and such like need correcting esp if u dont kno the cam...
dont kno how u can time it in without knowing the cam?
#6
Posted 01 January 2008 - 06:44 PM
I set it all up following the book then had a mate of my dads who is a mechanic to come round and adjust the timing and set it up.gunna say i thought you only just rebuilt,
did you do yourself?
you really need a r/r session, needle and such like need correcting esp if u dont kno the cam...
dont kno how u can time it in without knowing the cam?
Do you know of any rolling roads in Sheffield that specialise in Mini's?
Cheers
Dan
#7
Posted 01 January 2008 - 06:46 PM
Not just something daft like a sticking choke or low tyre preasures?
#8
Posted 01 January 2008 - 06:48 PM
Its not a stupidly hairy cam, think the profile is 731 (that make any sense?).Hairy cams cost mpg. Driving with the brakes on, clogged air filter, bad engine tune....
yep certainly does
C-AEA 800/731
Duration in/ex - 268/268
Cam Lift in/ex - .252/.252
Overlap - 53
Powerband est. - 2500-7000
So it is fairly hot cam for a 998, and if i remember correctly according to vizard the 731 is a poor cam due to it's lack of performance.
Edited by cap'n crunch, 01 January 2008 - 06:50 PM.
#9
Posted 01 January 2008 - 06:49 PM
oh its the one I was advised to use and told it was good for a 998Its not a stupidly hairy cam, think the profile is 731 (that make any sense?).Hairy cams cost mpg. Driving with the brakes on, clogged air filter, bad engine tune....
yep certainly does
BMC 731
Duration in/ex - 268/268
Cam Lift in/ex - .252/.252
Overlap - 53
Powerband - 2500-7000
So it is fairly hot cam for a 998. and is i remember correctly according to vizard the 731 is a poor cam due to it's lack of performance.
its times like these I wish I had bought a different car
#10
Posted 01 January 2008 - 06:56 PM
#11
Posted 01 January 2008 - 06:58 PM
"The 731 cam profile has long been considered a half-race profile, but it simply doesn't produce results in a 1275 motor, and it only produces results in 1100 engine when used in conjunction with very particular specifications. I have found that the 731 cam really comes into it#s own in 850s and 1000s and even then it's not really a sparkling cam. As one very well-known engine builder said: "install a 731 cam, lose all bottom end power and gain almost nothing at the top end."
it is certainly better than the standard 998cam but by is no means a belter.
#12
Posted 01 January 2008 - 07:05 PM
#13
Posted 01 January 2008 - 07:36 PM
#14
Posted 01 January 2008 - 07:40 PM
then theres lambs garage in clowne, little further from you BUT hes a mini man! min 3 weeks waiting list but brill!
knows his stuff.
#15
Posted 01 January 2008 - 07:42 PM
Edited by Dan, 01 January 2008 - 07:45 PM.
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