Looking for a bit of advice/feedback on other people's experience.
I have a track day car (circuit racing), it's actually a BMW E36 coupe, but fitted with a 318 Mopar engine. The engine was built maybe 30 years ago and is a pretty basic build of the day, stock replacement low comp pistons, factory heads which are supposed to be fitted with 360 valves and maybe bit of bowl work. It has a Weiand high rise dual plane intake, 650 Holley and shorty headers with twin 2.5" pipes. Running through a 4 speed manual box and 3.15 BMW rear end. The car is pretty light overall, say 2900 lbs with driver and runs around 96 mph in the 1/4 mile, so Wallace is saying I have around 200 HP.
It is pretty quick around the track, but my issue is that it lacks power and straight line performance. You can't really slam it up the inside under brakes at track day, so it needs to be able to pass cars in a straight line.
This is where it comes down to camshaft choice. The engine currently runs a 340 spec camshaft, so I want to know if I can make any significant gains with just a cam change. Lunati has suggested their 701 grind and I know there is the Hughes Whiplash cam that is supposed to work for low comp motors or am I wasting my time without bumping up the compression.
Can anybody give me some real world numbers of what some alternative cams will achieve for my application? The car tends to work in the 3500-6000 rpm range on the track, so that's where I need to make gains.
I have a track day car (circuit racing), it's actually a BMW E36 coupe, but fitted with a 318 Mopar engine. The engine was built maybe 30 years ago and is a pretty basic build of the day, stock replacement low comp pistons, factory heads which are supposed to be fitted with 360 valves and maybe bit of bowl work. It has a Weiand high rise dual plane intake, 650 Holley and shorty headers with twin 2.5" pipes. Running through a 4 speed manual box and 3.15 BMW rear end. The car is pretty light overall, say 2900 lbs with driver and runs around 96 mph in the 1/4 mile, so Wallace is saying I have around 200 HP.
It is pretty quick around the track, but my issue is that it lacks power and straight line performance. You can't really slam it up the inside under brakes at track day, so it needs to be able to pass cars in a straight line.
This is where it comes down to camshaft choice. The engine currently runs a 340 spec camshaft, so I want to know if I can make any significant gains with just a cam change. Lunati has suggested their 701 grind and I know there is the Hughes Whiplash cam that is supposed to work for low comp motors or am I wasting my time without bumping up the compression.
Can anybody give me some real world numbers of what some alternative cams will achieve for my application? The car tends to work in the 3500-6000 rpm range on the track, so that's where I need to make gains.