14nv lifters jacking

[therickyt]

hello
im racing with a 14nv engine running mostly stock parts due to the rules,
the lifters are jacking about 7400 is this about right, how can i gain more revs without solid lifters as were not aloud them,
can i increase oil pressure, im already using 20/50 oil

all ideas greatfully recieved
thanks

[phunkynova]

How old is your NV camshaft ?. If it has many miles on it it will be worn and you'll loose some power, if this is the case then better to replace it with a new one. (I take it that you must use a stock item).

[therickyt]

it had done 80k when i got it, everything else in the engine is new except the cam and crank, were would i get a new cam from?

[phunkynova]

not to sure other than GM or try some auto parts suppliers. Why do you want more rpm's ?.

[phunkynova]

IF you need more performance you can use the C/R gear box out of Nova SR/GTE/GSI and look at your final drive maybe you can use the 4.18 or 4.53 all so standard Nova fitment.

[therickyt]

if i can increase the rpm i can go slightly shorter on my gearing ratio there for getting better pull out the corners, but even so the cam idea is a good one to even increase my bhp by a small amount id good

[garyc]

8000 is normally about the limit. Try new vauxhall lifters, springs and some mobil 1 oil. Could your rev counter be out?

For a new cam try www.allittmotorsport.co.uk

[comptoncj]

My 1300 used to pull about 7500 with hydraulic lifters before they played up, but i think you are asking for alot out of a standard engine to pull 8000rpm. just play around with the gear ratios or the final drive, you will not gain any more power at that amount of revs anyway, you just need to work out as you change gear where the revs will be to drop it staight back into the high torque range of the engine.

[therickyt]

i am changing my gearing im slowly working down my chart with the cluster and final drive ratios to try and put together the best package,
everything is new in the engine apart from the cam but the lifters are from a motor manufacturer so may try putting genuine in,

[phunkynova]

Do you have a link to the reg's for you championship ?.

[therickyt]

http://www.skegness-stadium.info/drivers/rules/gthotrod.pdf

anyway you can help would be great, its such a fine line between fast and slow, im running a corsa with the engine fitted in that

[garyc]

Take it that you are on +40's with the pistons proud the block by 5 thou and head skimmed to the limit?

[therickyt]

the head ex is all done to limits the block is being done now, at the moment im still running normal sized pistons,