Search found 837 matches
- Sun Feb 10, 2019 5:17 pm
- Forum: Engines Area
- Topic: Cylinder head porting
- Replies: 10
- Views: 4797
- Sat Feb 09, 2019 7:59 pm
- Forum: Engines Area
- Topic: Cylinder head porting
- Replies: 10
- Views: 4797
Re: Cylinder head porting
Loads of posts and info on the subject will be found with a quick search as its a questions that has been asked many many times in the past.
- Sat Jan 19, 2019 9:59 am
- Forum: Exhaust, Cylinder Heads, Fuel And Intake Area
- Topic: Inlet manifold
- Replies: 5
- Views: 3388
Re: Inlet manifold
Unbolt the heater outlet pipe and see if the pipe is connected to it - Most don't have a tube that goes all the way to the front just a stub on the flange - maybe that one has an extended inner pipe to pick up the water where it is the hottest at the front of the engine. being perforated will make n...
- Sun Sep 09, 2018 8:10 am
- Forum: Exhaust, Cylinder Heads, Fuel And Intake Area
- Topic: 4,6 Ltr with quad Weber power output
- Replies: 20
- Views: 9808
Re: 4,6 Ltr with quad Weber power output
As far as cross-over manifolds go that's probably the best - but it is not the best of inlet manifolds for an RV8 as the numbers come with the downdrafts. It should be good for torque though. Then again, if being used with stock valve sizes and going the 5000 rpm route there will be nothing to choos...
- Fri Sep 07, 2018 9:25 am
- Forum: Exhaust, Cylinder Heads, Fuel And Intake Area
- Topic: 4,6 Ltr with quad Weber power output
- Replies: 20
- Views: 9808
Re: 4,6 Ltr with quad Weber power output
The inlet manifold I got in the workshop for DCOE is an alloy cross over, so no bents at all and nice long runner . (good for lower RPM). The swan neck manifolds, I don't like at all. Would never try them. Swan neck would be the only one I would use if I had to use a crossover - The centre ports in...
- Tue Sep 04, 2018 10:53 pm
- Forum: Exhaust, Cylinder Heads, Fuel And Intake Area
- Topic: 4,6 Ltr with quad Weber power output
- Replies: 20
- Views: 9808
Re: 4,6 Ltr with quad Weber power output
IDF manifold is no restriction on a RV8 - it's only a 45 bend on an RV8 not a 90 degree bend as on a Pinto - DCOE Manifold is a 135 bend with the swan neck types. Correctly ported the IDF manifolds are about the best you can get for the RV8.
- Tue Sep 04, 2018 10:44 pm
- Forum: Exhaust, Cylinder Heads, Fuel And Intake Area
- Topic: 4,6 Ltr with quad Weber power output
- Replies: 20
- Views: 9808
Re: 4,6 Ltr with quad Weber power output
I would say 230 as before - the heads will be the issue and all the capacity will do is lower the RPM that this figure is reached at and increase the torque - 250-300 is pie in sky on stock valves and "Minor" head work. 250-260 BHP will require Mid size valves at least - 270-280 will need some serio...
- Sun Jul 22, 2018 6:50 am
- Forum: Exhaust, Cylinder Heads, Fuel And Intake Area
- Topic: 4.6 heads on a 3.5 9.75:1 SD?
- Replies: 4
- Views: 2850
Re: 4.6 heads on a 3.5 9.75:1 SD?
Later 10 bolt heads would increase the compression - probably what you meant to write - composites reduce it back to stock. There can be small gains as the castings are better but not significant.
- Sun Jul 22, 2018 6:47 am
- Forum: Engines Area
- Topic: 3.5 9.75:1 Puffing blue smoke
- Replies: 16
- Views: 7115
Re: 3.5 9.75:1 Puffing blue smoke
100C may not be excessive for a modern engine but its way outside the comfort zone for a Rover engine.
- Sat Jul 14, 2018 6:43 pm
- Forum: Exhaust, Cylinder Heads, Fuel And Intake Area
- Topic: Rover V8 Boxer carb installation blog
- Replies: 50
- Views: 19866
Re: Rover V8 Boxer carb installation blog
You may have more engine capacity but with stock heads you have the same air flow. The increase in capacity will just mean things are all over by 4800RPM rather than 5300RPM - (figures are just arbitrary for example). Calculation for establishing the lower RPM maximum horsepower will occur at for th...
- Wed May 23, 2018 12:22 pm
- Forum: Electrical & Ignition Area
- Topic: Ignition Timing moving around
- Replies: 4
- Views: 2926
Re: Ignition Timing moving around
Is this all from a fixed datum of a disconnected and blocked off Vac advance - and the same idle speed.
Sticking advance weights. Advance tube vac tube leaking / collapsing
Sticking advance weights. Advance tube vac tube leaking / collapsing
- Sat May 05, 2018 5:43 am
- Forum: Engines Area
- Topic: RV8 Suddenly Doing 17-18 AFR at 50 kmh
- Replies: 5
- Views: 2746
Re: RV8 Suddenly Doing 17-18 AFR at 50 kmh
Are you getting a decent spark from the dizzy - is the high reading just that the O2 is just not getting used - i.e no/poor combustion - you will need a good spark and advance at cruise to light a lean mixture - is the spark weak or has the advance module failed. May also be worth having a look see ...
- Fri Apr 13, 2018 2:26 pm
- Forum: Engines Area
- Topic: Piston & Conrod weight of a 4.6
- Replies: 2
- Views: 1771
Re: Piston & Conrod weight of a 4.6
If its being balanced then you need to weigh your own pistons and rods - all matched to lightest and provide that to the balancer - info from elsewhere is pointless.
- Wed Jan 17, 2018 5:39 pm
- Forum: Electrical & Ignition Area
- Topic: Rover V8 Starter Motor Wiring
- Replies: 16
- Views: 13172
Re: Rover V8 Starter Motor Wiring
There are two coil windings in a solenoid - the first is the main pull in coil and this gets its earth path from the + connection to the starter motor - yep thats right. The second hold in solenoid gets it -ve from the casing of the solenoid and a normal earth path as it needs this when the solenoid...
- Sat Jan 06, 2018 1:08 pm
- Forum: Please Tell Us About Yourself
- Topic: new member
- Replies: 3
- Views: 2428