stocky
New Member
- Joined
- Jun 14, 2005
- Messages
- 5,040
- Reaction score
- 80
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- Age
- 36
- Location
- Melbourne
- Members Ride
- 1995 HSV Clubsport T5, 1991 VN Berlina
So I've recently installed a wade cam into my VR 304. it makes power at 2500rpm to 6000rpm, and i can definately feel it kick it around then. the problem is before 2500rpm its just too much of a slug and i dont think its due to bad cam choice. i think the problem is elsewhere.
if i try to stall it up and launch, say stall to 4000rpm or so, then slowly let the clutch out. no matter what i try, it just seems to bog down way too much and go off real slow. only sometimes can i get a bit of chirp from the tyres.
even when crusing along, the car seems to jolt about a bit. if im driving along and the revs are between 1100 and 1500 or so, the car seems to lurch back and forward while driving. its hard to describe, but it doesnt feel right.
along with this, its using a fair bit of fuel. before the cam, i could get about 13L/100km average, but after the install, the best i can get is around 22L/100km. this definately doesnt seem right. what are the chances that the spark plugs, or the oxygen sensor could bugger up the same time i did this install? would it be worth looking into replacing any of these bits? the current plugs are around 7000km old, and i recently had one of them fail for some reason.
im not sure what else i can do, except adjust the tune, get some diff gears and a new manifold, however i dont see the manifold fixing up my low rpm problems. the heads have been shaved 60 thou, to raise the compression up around 9.2:1, and the exhaust consists of pacemakers, twin cats, crossover, twin 2.5 merging into a single 2.5 out back. the exhaust will be a full twin system soon
if i try to stall it up and launch, say stall to 4000rpm or so, then slowly let the clutch out. no matter what i try, it just seems to bog down way too much and go off real slow. only sometimes can i get a bit of chirp from the tyres.
even when crusing along, the car seems to jolt about a bit. if im driving along and the revs are between 1100 and 1500 or so, the car seems to lurch back and forward while driving. its hard to describe, but it doesnt feel right.
along with this, its using a fair bit of fuel. before the cam, i could get about 13L/100km average, but after the install, the best i can get is around 22L/100km. this definately doesnt seem right. what are the chances that the spark plugs, or the oxygen sensor could bugger up the same time i did this install? would it be worth looking into replacing any of these bits? the current plugs are around 7000km old, and i recently had one of them fail for some reason.
im not sure what else i can do, except adjust the tune, get some diff gears and a new manifold, however i dont see the manifold fixing up my low rpm problems. the heads have been shaved 60 thou, to raise the compression up around 9.2:1, and the exhaust consists of pacemakers, twin cats, crossover, twin 2.5 merging into a single 2.5 out back. the exhaust will be a full twin system soon