Search found 459 matches
- Fri Oct 28, 2022 7:51 pm
- Forum: Engines Area
- Topic: High Oil Pressure
- Replies: 30
- Views: 16425
Re: High Oil Pressure
Compressed air is the best bet, it won't take all that much with no spring behind it. How have you got it stuck closed? Never had that, they always stick open IME.
- Sun Sep 04, 2022 3:05 pm
- Forum: Exhaust, Cylinder Heads, Fuel And Intake Area
- Topic: TA / Wildcat heads
- Replies: 27
- Views: 48023
Re: TA / Wildcat heads
We have Wildcats for the dragster.
- Fri Aug 26, 2022 6:20 pm
- Forum: Engines Area
- Topic: 5 litre Wildcat stroker motor advice
- Replies: 3
- Views: 1381
Re: 5 litre Wildcat stroker motor advice
In performance engines at the highest level, at least for a normally aspirated engine, the trend is towards smaller journals not larger. if boost is involved then strength becomes an issue but otherwise it is not significant. A smaller journal has a much lower bearing surface speed, this results in ...
- Fri Aug 26, 2022 6:08 pm
- Forum: Engines Area
- Topic: Newbie 3.5 Engine advice & info please!
- Replies: 2
- Views: 967
Re: Newbie 3.5 Engine advice & info please!
It is highly likely your engine has a severely worn camshaft and lifters. These can be completely worn out and the engine will run smoothly but obviously power will be greatly reduced. Can you run a compression test first to see what condition the engine is in overall? If one or two cylinders are ve...
- Fri Aug 26, 2022 5:58 pm
- Forum: Engines Area
- Topic: poor piston to valve clearance cures
- Replies: 8
- Views: 1871
Re: poor piston to valve clearance cures
First things first. What did you set preload to. Ideally you want 0.020 for best rpm potential. if you have more preload there is more chance of the valve hitting the piston when it is running in the event the lifters pump up. If you have had both head and block skimmed it is possible that you need ...
- Sun Jan 19, 2020 12:18 am
- Forum: Engines Area
- Topic: Exhaust manifold temperature.
- Replies: 10
- Views: 4679
Re: Exhaust manifold temperature.
If you haven't found a solution then forget idle temperatures, if you even them up you will often find big differences at higher rpm. It is far more important to have equal temperatures at the rpm you run regularly.
- Sat Jan 18, 2020 8:42 pm
- Forum: Engines Area
- Topic: Failure of stock cast 3.9/4.0 pistons at higher RPM? Or Forged options?
- Replies: 4
- Views: 2582
Re: Failure of stock cast 3.9/4.0 pistons at higher RPM? Or Forged options?
We run 6^ Scat Chevy Rods, narrowed to suit, also need to narrow Chevy bearings to suit. Keith Black Ikon forged pistons built for a stock stroke, stock bore Chevy 305. Piston is 3 thou out of the bore and is flat topped. However we run a 40 thou thick head gasket. This gives around 11-1 compression...
- Tue Dec 18, 2018 8:37 pm
- Forum: Engines Area
- Topic: Chevy 305 pistons in Rover v8
- Replies: 2
- Views: 2259
Re: Chevy 305 pistons in Rover v8
They don't line up at all. We run these pistons in a dragster, for or purposes it's no issue as we don't need valve reliefs with a blower cam, I am sure they make a dished forged piston in the same size. You could then put in any reliefs you need to suit your application. The stock 305 pistons on a ...
- Sun Dec 11, 2016 11:14 am
- Forum: Engines Area
- Topic: 4.6 Build.. Spec ideas?
- Replies: 89
- Views: 34900
Tony's pistons are custom, however I have been playing with the numbers for a 5.7 rod engine based on a 4.6 as we have two sets of 5.7 rods available. This will be the rod journals turned down to 2" and offset by 0.050" in the process. With a Keith Black Ikon 305 Chevy forged piston, the stock Chevy...
- Fri Nov 25, 2016 2:03 pm
- Forum: Exhaust, Cylinder Heads, Fuel And Intake Area
- Topic: ARP Bolt Torque Settings
- Replies: 12
- Views: 6652
- Sat Nov 19, 2016 2:59 pm
- Forum: Exhaust, Cylinder Heads, Fuel And Intake Area
- Topic: constant popping and banging on idle and revving
- Replies: 3
- Views: 2890
- Sun Oct 09, 2016 1:01 pm
- Forum: Exhaust, Cylinder Heads, Fuel And Intake Area
- Topic: Cool air for the 3.5 V8 in a Marcos
- Replies: 6
- Views: 4112
The ran air effect at road speeds is insignificant, you will be lucky to see 1/2 lb and then only over 100 mph. As you say the main benefit is that the carb sees the cooler air outside of the engine bay, this is what makes it worthwhile. Just jet the carb as normal and don't worry about any boost re...
- Wed Oct 05, 2016 6:23 am
- Forum: Engines Area
- Topic: Rover V8 liner replacement 3.5 - 3.9
- Replies: 10
- Views: 7187
Our machine shop always machines liners out. We just had three oversize liners fitted due to a major overheat. I can't see the liners falling out from just heating the block and I seem to recall the blocks were heat treated during manufacture. If this is the case then the heat treat will be lost at ...
- Mon Sep 26, 2016 5:06 pm
- Forum: Engines Area
- Topic: Fretting on main caps. Scrap or cross bolt?
- Replies: 7
- Views: 3967
The major problem with fretting is that the transfer of metal can result in inconsistent positioning of the mains when removing and refitting. A stud kit alone will not prevent this, we have fretting on our non-crossbolted engines and always use studs at 90 lb/ft torque. One tip from American drag r...
- Thu Sep 08, 2016 12:04 am
- Forum: Engines Area
- Topic: Discovery 2 4.6 v8 build help!
- Replies: 45
- Views: 20128
If you have a cam that allows early cylinder filling like a torque oriented camshaft you need a lower compression, if you have a high revving engine you can use a power oriented camshaft with more duration, you are correct in thinking that a torque camshaft will not work with high compression With h...