Roller Rockers

[v8ian]

Heres a question thats bothering me a bit, -----When I crank over my engine, 3.9RV8 I get LOTS of oil up at the rockers, these are Kenne Bell Roller Rockers, im wondering if there should be a restrictor plug in the heads to stem the oil, I know the oil is beneficial to keeping everything cool at hi revs, bit I have a feeling I will be running with my rockers covers brimming @ 7k

[Pupp]

v8ian said:

Heres a question thats bothering me a bit, -----When I crank over my engine, 3.9RV8 I get LOTS of oil up at the rockers, these are Kenne Bell Roller Rockers, im wondering if there should be a restrictor plug in the heads to stem the oil, I know the oil is beneficial to keeping everything cool at hi revs, bit I have a feeling I will be running with my rockers covers brimming @ 7k

Isn't there an accepted mod for this involving additional drain holes being bored at the 'low' end of the gallery?

What set up gets you usable power at 7k? Must sound great!

[Boosted LS1]

Roller rockers get plenty of lubrication from the oil mist in the rocker cover. The mod is to fit restrictors into the head so less oil goes upstairs and more oil stays downstairs. Basically all you do is reduce the oil passage diameter with a drilled insert. You pick the hole size

[v8ian]

Boosted LS1 said:

Roller rockers get plenty of lubrication from the oil mist in the rocker cover. The mod is to fit restrictors into the head so less oil goes upstairs and more oil stays downstairs. Basically all you do is reduce the oil passage diameter with a drilled insert. You pick the hole size

Guessed as much, theres too much up there to be right,

[v8ian]

PUPP, heres a link,
http://www.pistonheads.com/gassing/topic.asp?h=0&a...

[rev-erend]

I had one of my Kenne Belles strip it's adjuster thread a while back and managed to get a few spares from John Eales and Real Steel.

Real Steel provided a sheet with the Rockers saysing :

When using std rocker shafts - the end roller rockers will have to be narrowed (visually check alignment of the head to valve stem).

Restrict oil flow to RR's with a piece of metal in the oil feed - suggest a hole of 0.065 inch (1.67 mm according to my verniers) Says you may need to experiment to find most suitable size.
Alternatively use the thinnest pedestal shims and rotate the shim at the pedestal that feeds the oil feed hole is blocked off, then drill a 0.065 inch hole in the shim to line up with the pedestal oil feed hole.

Bet you wished you had not asked..

Edited by rev-erend on Friday 1st August 11:50

[Pupp]

v8ian said:

PUPP, heres a link,
http://www.pistonheads.com/gassing/topic.asp?h=0&a...

Excellent

Reminds me of a car I used to see at the pod years ago... 'Screamin Tina', can't remember whether it had an Rv8 mill but it certainly had a v8 that used to breathe and spin up well

Can I ask what cam you use?

[rev-erend]

Ian - very nice MK2.. used to have a Swaymar tuned 3.0 V6 MK2 about 26 years ago.. scary car for an 18 year old

Who TB's do you use ?

What kink of bhp is that making ?

Also meant to add - if you have too much oil flow at the top end - this must release the pressure a bit - so the pressure in the crank/big end bearings and around the cam will be less.. so not so good for high revs
- at least thats how I imagine it..

Edited by rev-erend on Saturday 2nd August 10:57

[v8ian]

Pupp,
The cam im using is a Tom Wilkenshaw SDi European Touring Car Grp A mechanical thing, Ive just had a new one made by Newmans as the old one was starting to wear, Its not such a silly cam that its undrivable, in fact its surprisingly tractable, 15mph in top right up to its red line.
Rev-erand,
Throttle bodies are "Luminition", but look on the other side the theres Jenvey cast on the back, badge engineering at its best???? so they are Jenvey 45mm downdrafts.
As for HP, 285hp @6k and 228 ftlbs @4.9k on Dave Walkers Rollers so I know its going to be fairly accurate,
Back to the origial subject: I am in total agreement about the oil up top, if its up at the rockers in this amount, its not doing its job elsewhere,especially as I have not restricted the lifter galleries as I am running solid lifters, but with the rovers ability to dissolve cams in an afternoon I think it may be wise to get as much oil onto the cam as possible.
Another thought all that oil up the top may have a cooling effect on the engine as its flowing right over the top of the chambers and exhaust ports, Ive increased my oil capacity in my sump to a max of 7 litres excluding filter and cooler, It did cross my mind to use a 3 port dry sump pump, and the wet sump, with driect feeds to the mains, cam spray bar in the lifter valley and direct feed to the rockers, that would eliminate the cr-p pump that rovers have, but I just dont like the whole engine relying on a small toothed belt to drive the pump




Ian

[v8ian]

Everybody missed my C-ckUp, with the idea to plug the pedistals, you cant!!!!!, The oil runs into the shaft Via a necked bolt shank, so thats a non starter,, its now going to have a restrictor turned up as a small "TopHat" that will slide into the head with a 1mm ish hole up the middle

[rev-erend]

That's a pretty good bhp / litre for a 3.9 .. what CR are you running ?

Cam rounds pretty wild - lift > .05 inch - duration > 300 degrees ?

[Daveuk9xx]

v8ian said:

As for HP, 285hp @6k and 228 ftlbs @4.9k on Dave Walkers Rollers so I know its going to be fairly accurate,
Ian

Some mistake with the figures there I believe. Perhaps you mean 288 ft lbs because 228 would only be 58 ft lbs per litre and that's far too low to be credible in that state of tune unless there's a serious engine problem.

However more to the point 285 bhp at 6k = 285 x 5252 / 6000 = 249 ft lbs which is higher than you supposedly have at peak torque and of course you can't have more torque anywhere else than at peak torque.

Dave

[That Daddy]

Pupp said:

v8ian said:

PUPP, heres a link,
http://www.pistonheads.com/gassing/topic.asp?h=0&a...

Excellent

Reminds me of a car I used to see at the pod years ago... 'Screamin Tina', can't remember whether it had an Rv8 mill but it certainly had a v8 that used to breathe and spin up well

Can I ask what cam you use?

Was it Steve Greens Mk1 Cortina 4.5 RV8 by any chance Pupp? that thing was sponsered by TWR racing and it revved to something getting on for 9K and thru a 8 into 1 exhaust sounded superb rumour as it that TVR approached them about their work of the RV8,i dont know how true that is though it was a long time ago,car is still about so i heard http://www.youtube.com/watch?v=-YRHWX0i_60http://www.youtube.com/watch?v=la6Ygj71fbA&fea...http://www2.rhbnc.ac.uk/~uhaa028/steve2.htmlhttp://www2.rhbnc.ac.uk/~uhaa028/green1.html

Edited by That Daddy on Sunday 3rd August 13:48

Edited by That Daddy on Sunday 3rd August 13:50

[v8ian]

Daveuk9xx said:

v8ian said:

As for HP, 285hp @6k and 228 ftlbs @4.9k on Dave Walkers Rollers so I know its going to be fairly accurate,
Ian

Some mistake with the figures there I believe. Perhaps you mean 288 ft lbs because 228 would only be 58 ft lbs per litre and that's far too low to be credible in that state of tune unless there's a serious engine problem.

However more to the point 285 bhp at 6k = 285 x 5252 / 6000 = 249 ft lbs which is higher than you supposedly have at peak torque and of course you can't have more torque anywhere else than at peak torque.

Dave

Ive just been thru my programme for the ECU, which has all the data I should need, It looks like the whole system is corrupt, I may have 2 or even 3 programmes on top of each other, Ive recently changed ECU functions from Dissy to coilpacks and had big trouble trying to get it running, and failing totally, which, if the system is totally corrupt, explains an auful lot, What has compounded the problem is ive also changed laptop, which wont communicate with the ECU or even recognise its there, which also entails transfering details from floppy to CD, which is where the corruption may be have occoured, Looks like Dave Walker is getting a call tomorrow,

Ive managed to find a printout of one of last runs which is 279hp @ 6k and 253ft,lbs @4.9k,I think we got the HP up a wee bit on another run, but I cant find the printout.


Rev-erend, Static Comp was a stupid 13.1, my mate did the calculations and he thought it was more, dynamic is somewhere around 10.5, Ive had the heads skimmed a touch so its a wee bit more.

[Pupp]

That Daddy said:

Pupp said:

v8ian said:

PUPP, heres a link,
http://www.pistonheads.com/gassing/topic.asp?h=0&a...

Excellent

Reminds me of a car I used to see at the pod years ago... 'Screamin Tina', can't remember whether it had an Rv8 mill but it certainly had a v8 that used to breathe and spin up well

Can I ask what cam you use?

Was it Steve Greens Mk1 Cortina 4.5 RV8 by any chance Pupp? that thing was sponsered by TWR racing and it revved to something getting on for 9K and thru a 8 into 1 exhaust sounded superb rumour as it that TVR approached them about their work of the RV8,i dont know how true that is though it was a long time ago,car is still about so i heard http://www2.rhbnc.ac.uk/~uhaa028/steve2.htmlhttp://www2.rhbnc.ac.uk/~uhaa028/green1.html

Edited by That Daddy on Sunday 3rd August 13:45

Wasn't that car, at least not in that trim... was late 80s though when I was there regularly with the bikes. I'll get googling and see what I can find.

Great clips

[v8ian]

Steves old car was a stock bodied Mk1 and If I remember correctly was metallic red, then metallic dark blue, than JWR Mid Blue

[That Daddy]

v8ian said:

Steves old car was a stock bodied Mk1 and If I remember correctly was metallic red, then metallic dark blue, than JWR Mid Blue

Spot on late eighties on if memory serves and dident that stock body twist up some when he launched off the line

Edited by That Daddy on Sunday 3rd August 18:26

[Daveuk9xx]

v8ian said:

Ive just been thru my programme for the ECU, which has all the data I should need, It looks like the whole system is corrupt, I may have 2 or even 3 programmes on top of each other, Ive recently changed ECU functions from Dissy to coilpacks and had big trouble trying to get it running, and failing totally, which, if the system is totally corrupt, explains an auful lot, What has compounded the problem is ive also changed laptop, which wont communicate with the ECU or even recognise its there, which also entails transfering details from floppy to CD, which is where the corruption may be have occoured, Looks like Dave Walker is getting a call tomorrow,

Ive managed to find a printout of one of last runs which is 279hp @ 6k and 253ft,lbs @4.9k,I think we got the HP up a wee bit on another run, but I cant find the printout.

I would expect a properly built V8 with TBs and a decent cam to be giving 75 ft lbs per litre minimum and ideally 80 or more. That's 292 ft lbs upwards and hopefully well over 300. BHP should also be well over 300. I used to do the cylinder head flow development for a car in the Morgan V8 series and perhaps you have stock or badly modified heads but something ain't right.

As for PCs not communicating with Emerald ECUs if I had a quid for every person I know about who'd experienced that I'd be a rich man. It's a problem that seems to have been ongoing for some 15 years. It's one reason why I've never sold or recommended them. I've never known a DTA that didn't just work properly straight out of the box and do exactly what it said it would do on the tin.

Dave

[rev-erend]

When you have slightly less power than people expect - this can often be down to the dyno.

Heck - it might just be telling the trush and not telling the porkie that people have come to expect

[350Matt]

Daveuk9xx said:

As for PCs not communicating with Emerald ECUs if I had a quid for every person I know about who'd experienced that I'd be a rich man. It's a problem that seems to have been ongoing for some 15 years. It's one reason why I've never sold or recommended them. I've never known a DTA that didn't just work properly straight out of the box and do exactly what it said it would do on the tin.

Dave

Hang on sec if you set the COM ports up correctly with the right Baud rate, Emeralds work fine

The problem here isn't the unit its the users

Matt