Search found 22 matches

by richyb66
Tue May 19, 2020 5:51 pm
Forum: Engines Area
Topic: Rover V8 cylinder head porting advice.
Replies: 57
Views: 21965

Re: Rover V8 cylinder head porting advice.

I think the engine guy is playing it safe. He could probably press the guides out cold but if they drag on the head and the hole ends up oversized, the head would be scrap. He can see that I've spent a good few hours on the porting and maybe thinks machining is the lowest risk option.
by richyb66
Sat May 16, 2020 2:45 pm
Forum: Engines Area
Topic: Rover V8 cylinder head porting advice.
Replies: 57
Views: 21965

Re: Rover V8 cylinder head porting advice.

I managed to get my heads dropped off for machining on Wednesday. The guy there said that the cable guides are difficult to remove by heating the head as this tends to cause the valve seats to fall out. To avoid this, he will machine the guides out to leave a very thin wall before drifting them out....
by richyb66
Tue May 05, 2020 9:26 am
Forum: Engines Area
Topic: Rover V8 cylinder head porting advice.
Replies: 57
Views: 21965

Re: Rover V8 cylinder head porting advice.

Yes, I actually used your images for reference thanks. I'm not expecting the finished job to be as good as a professional but from what I've read, there are some gains to be have if I concentrate on specific areas.
by richyb66
Mon May 04, 2020 8:26 pm
Forum: Engines Area
Topic: Rover V8 cylinder head porting advice.
Replies: 57
Views: 21965

Re: Rover V8 cylinder head porting advice.

Thanks for the reply. I'm definitely sticking with the standard seats so I'm not planning on going much bigger in diameter on the throats. 36mm would be 1.3mm bigger (slightly less than the increase in the inlet valve size). Exhausts I'm thinking increase from 28.3 to maybe 29.5mm? This is more an e...
by richyb66
Mon May 04, 2020 12:56 pm
Forum: Engines Area
Topic: Rover V8 cylinder head porting advice.
Replies: 57
Views: 21965

Re: Rover V8 cylinder head porting advice.

Next up I turned to the bowl behind the valve. Obviously the valve guide protrudes in to the port and was going to get in the way so rather than get the guides knocked out, I instead drilled them out. I used a 10mm and then a 12mm drill to open the guide out, drilling down so the hole went slightly ...
by richyb66
Mon May 04, 2020 12:11 pm
Forum: Engines Area
Topic: Rover V8 cylinder head porting advice.
Replies: 57
Views: 21965

Re: Rover V8 cylinder head porting advice.

I'm bumping an old thread here but hopefully what I've got to add is relevant to what went before. I've decided to try and make the best use of the lockdown and have something constructive to show for it rather than sitting on my backside for days on end. I'd been thinking of getting some better cyl...
by richyb66
Fri Mar 13, 2020 8:10 am
Forum: Exhaust, Cylinder Heads, Fuel And Intake Area
Topic: Thor Bannana Plenum
Replies: 15
Views: 1388

Re: Thor Bannana Plenum

Not actually an answer to the original question but if the basic issue is space on the passenger side of the engine bay, could you swap to a GEMS inlet and then rotate the top throttle body casting 180 degrees so it's on the drivers side. I'm pretty sure the bolt spacing will allow this.
by richyb66
Thu Sep 26, 2019 8:33 pm
Forum: Engines Area
Topic: 3.9 later intermin Serp Engine project
Replies: 5
Views: 435

Re: 3.9 later intermin Serp Engine project

Here's another more detailed picture. https://i.postimg.cc/MprpmyBc/DSC-0408.jpg The spacer is 20mm thick. It's bolted on through the centre of the tensioner into a hole drilled and tapped in to the lifting eye and also in to the head with a longer bolt through the existing lifter eye hole. Not visi...
by richyb66
Thu Sep 26, 2019 8:12 am
Forum: Engines Area
Topic: 3.9 later intermin Serp Engine project
Replies: 5
Views: 435

Re: 3.9 later intermin Serp Engine project

I'm running just and alternator and water pump on a serp setup and I repositioned the standard tensioner.

I posted some pictures in this thread:

viewtopic.php?f=12&t=15309&p=117028#p117028

Done over 8k miles on this setup with no issues.
by richyb66
Tue Apr 16, 2019 4:29 pm
Forum: Engines Area
Topic: Alternator and Tension Pulley assembly problem. can you Help?
Replies: 3
Views: 303

Re: Alternator and Tension Pulley assembly problem. can you Help?

You really want a sprung tensioner with a multi vee belt. Alternator should be mounted solid. What is the black plastic pulley top right driving? I used the standard 4.6 sprung tensioner and moved it from underneath the alternator (where it clashed with the steering shaft and moved it to the front o...
by richyb66
Thu Apr 11, 2019 11:50 am
Forum: Drivetrain & Transmission Area
Topic: LT77 Identification - again
Replies: 1
Views: 349

Re: LT77 Identification - again

LDV400 if it's the same as the one mentioned in the 4th post here:

viewtopic.php?t=7540

if it is, then the low 1st gear should be easy to establish and might determine it's suitability for what you're using it.
by richyb66
Wed Feb 27, 2019 12:34 pm
Forum: Drivetrain & Transmission Area
Topic: Lt77 from a jaguar details?
Replies: 2
Views: 399

Re: Lt77 from a jaguar details?

It could be but isn't there a suffix letter at the end of the number? That would give a better indication of what the internals are. Ratios could well be different to SD1 but knowing BL, they probably aren't.
by richyb66
Mon Dec 10, 2018 4:20 pm
Forum: Drivetrain & Transmission Area
Topic: Rover SD1 Clutch Slave Fitting
Replies: 7
Views: 895

Re: Rover SD1 Clutch Slave Fitting

I'm amazed anyone at rover in the 70's knew what a metric thread was. When I fitted my helix clutch last winter I had to swap the SD1 Master Cylinder for a bigger bore Defender V8 one because you couldn't physically press the clutch pedal. The inlet sizes were different so I ended up getting a new h...
by richyb66
Mon Dec 10, 2018 9:11 am
Forum: Drivetrain & Transmission Area
Topic: Rover SD1 Clutch Slave Fitting
Replies: 7
Views: 895

Re: Rover SD1 Clutch Slave Fitting

Pretty sure it's 7/16" UNF

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