The V8 Owners Forum -

Larger intake funnels shift the optimal airflow upwards, thus tending to lead to more power. However! They also worsen cylinder filling at low RPMs, thereby reducing torque. If the smaller funnels are still available, reverting to the smaller ones would improve the engine's versatility. Swapping the...

That's what I would have expected.

Theoretically, a larger valve overlap should only make sense on a turbocharged direct-injection engine. It would improve scavenging without heating the exhaust.

Interesting! I'd never thought about that before (due to my problem).

Cheers

It could just be a tuning issue ? The Rhoads were ticky, but no real annoyance really. As to how much they really changed things, no idea, as don't think I ever ran them against standard type lifters to compare. In principle, Rhoads lifters cut off the lower part of the cam profile. But only at ver...

One other thing I did wonder about is whether there is any lost motion with a hydraulic lifter. I've never had one of these apart but I'm guessing they have some sort of port in them to let oil in which will close off as the lifter rises (similar to a brake/clutch master cylinder) this could result...

A key factor in determining whether a camshaft performs well at low RPMs or whether the engine reacts roughly is the overlap. The lower the point at which the intake and exhaust curves overlap, the smoother the engine will run. As is often the case, more isn't always better. Sacrificing a few horsep...

That's exactly right. A camshaft that makes a 3.5L engine aggressive will, at best, make a 4.6L engine sound sporty. The stock camshafts are already quite tame. Unfortunately, I don't have a curve for the 3.9L. Here are the curves for the 3.5L, the Typhoon, and the Viper Hurricane. https://up.picr.d...

The modification usually involves the height of the valve guides. To allow for the increased lift, the guides need to be shortened at the top. Different valve springs are probably also installed. A camshaft with slightly less lift isn't affected at all. I've had good experiences with the Viper Stump...

Hello,

I'm guessing it's a DW270 Viper Typhoon.





Regards, Frank

The valve train is original. The rocker arm shafts are used standard shafts with low mileage.
The valve springs are Kent VS44.

I use the cheapest 15W40 oil available. I change it once a year or every 10,000 km.

Regards Frank

Hello Alex, The Kent H180 has the "Sports Torque" designation. This means that the camshaft is designed relatively consistently for torque. This is achieved through relatively tame valve timing but with a high cam lift. In other words, the valves open and close comparatively quickly. This ...

Then that might work. I wouldn't go for the H200; it's too tame in my opinion. I think the Viper Stump Puller would also be suitable. It's not quite as powerful at the bottom end, but it can rev a bit better. But that only makes sense if you drive fast. The H180 can handle the short sprint, too. Do ...

Hi Nige, I have a 4.6-liter with 10.5:1 compression. I use the Kent H180, but with two SU carburetors. The engine has enormous torque from idle and drives very well. The car is a heavy 4x4, so it's not really a sporty car. But the torque surges suit the car well. What car is your 5.2 engine in? What...

The main bottom hose (outlet) from the the radiator (the one that goes to the water pump). Has a 'T' in it, this 'T' goes to the bottom of the tank. As it is, everything is working perfectly, apart from the fact that the tank gets hotter than I'd like, I think it's not helped by the fact that the t...

The correct answer is: # 1x Small hose from the carburetor dome to the radiator. # 1x Small hose from the radiator to the lower expansion tank connection. # 1x Overflow from the upper expansion tank connection to the outside. https://up.picr.de/49979996mw.jpg What do you mean by: ...bottom radiator ...

Hello, I think your design won't work correctly. As we all know, water expands when it gets hot. But when it gets cold, it contracts again. We also know that water begins to boil at 100°C. It's important to note that this only happens at typical atmospheric pressure. In the context of cooling system...