Next question is:> There is a wide range of rockers available with a big variation in price. I > don't want to spend a fortune unnecessarily, but on the other hand, the last > thing I want is to spend a fair bit for bugger all gain when I could spend a > bit more and get a real gain.> Can anyone recommend some rockers that I can get from a supplier in > Australia that would do the job?>

I've got twin 1.25" S.U.'s, extractors and the head has been ported and > oversize valves fitted. It goes really well up to about 3,000 rpm but gets > a bit breathless after that. Would I be realistic in expecting another 10 > bhp, say, in the 2,500+ rpm range?>

Thanks in advance,>

GrahamL >

"Juice" <Juice@Juicenet.usa­> wrote in message>news:yif3e.­2810$k57.2025@fed1re­ad07...>> Graham L wrote:>>> My mechanic tells me that as an alternative to fitting a lumpier cam in>>> my 1275cc Moke, I can put in a set of high ratio rockers. Any experience>>> out there.>>>

Next question is:>There is a wide range of rockers available with a big variation in price. I>don't want to spend a fortune unnecessarily, but on the other hand, the last>thing I want is to spend a fair bit for bugger all gain when I could spend a>bit more and get a real gain.>Can anyone recommend some rockers that I can get from a supplier in>Australia that would do the job?>

I've got twin 1.25" S.U.'s, extractors and the head has been ported and>oversize valves fitted. It goes really well up to about 3,000 rpm but gets>a bit breathless after that. Would I be realistic in expecting another 10>bhp, say, in the 2,500+ rpm range?>

Thanks in advance,>

GrahamL>

"Juice" <Juice@Juicenet.usa­> wrote in message >news:yif3e.2810$k5­7.2025@fed1read07...­>> Graham L wrote:>>> My mechanic tells me that as an alternative to fitting a lumpier cam in >>> my 1275cc Moke, I can put in a set of high ratio rockers. Any experience >>> out there.>>>

Next question is:>There is a wide range of rockers available with a big variation in price. I >don't want to spend a fortune unnecessarily, but on the other hand, the last >thing I want is to spend a fair bit for bugger all gain when I could spend a >bit more and get a real gain.>Can anyone recommend some rockers that I can get from a supplier in >Australia that would do the job?>

I've got twin 1.25" S.U.'s, extractors and the head has been ported and >oversize valves fitted. It goes really well up to about 3,000 rpm but gets >a bit breathless after that. Would I be realistic in expecting another 10 >bhp, say, in the 2,500+ rpm range?>

Thanks in advance,>

GrahamL >

GrahamL>

As an experiment, make a note of the valve lash setting you are using> now. Open them up by a few thousandths. Warm up the engine and make a> power run. If it helps try opening them up a few more thousandths and> test again. You don't want to go too far with this but it can give you> an idea about what is going on with the engine.>

The twin HS2s on a stock manifold don't flow much worse than an> HS6/HIF44 on the Metro/Torquemaster manifold. With a little> modification they can in fact flow better. You do want to make sure> that the HS2s are in good shape to begin with, that you have a free> flowing intake filter and that there are now vacuum leaks between the> carb and the head. Any of these can lead to the problem you have.>

The best compromise of price and effectiveness in my opinion is the> roller tipped rockers. They are more accurately made than the offset> bushes in the standard rockers and are cheaper than the full roller> rockers.>

Cheers,>

Kelley>

Also try running an 850 cam if you can get hold of one and try that (more> lift and longer dwell)>

I put a 1300 head onto a 1000 block and got a lot of increase in power and> torque (80+ bhp)>

Running single 1.75 SU 850 cam an new followers.>

Effectively the engine has a stage three head before any work is done to

!!!!>

Make sure your brakes are strong enough to cope with the extra grunt...>

Matt>

Iґm building a 1275 engine with the original cam, but if its better the

cam i do the change,>

which fuel pump do I use??? from 850 or 1275> regards>

manuel>

"matt n caz" <cb001r5377@blueyon­der.co.uk> wrote in message> news:bSw3e.17703$Nr­5.3809@fe2.news.blue­yonder.co.uk...> > Yup he's right, you'll be better off with a single SU and not twin.> >

keep up with the fuel flow.>

"manuel marchant" <mmarchant@impsat.c­l> wrote in message> news:4252c834@news.­impsat.cl...> > did you mean a original and standar 850 cam??> >