Ive been puting bits on my engine for the last year or so geting it ready for a remap which i will take to reylands maybe next month, but ive just had a thought i still have standard valve spring.. My engine at the moment has a tt38, but everything else on the engine been done to make big power so i wouldnt be surprise it it knocked out 480bhp or something big on a tt38 as nothing should ristrict the performance..

so how do i stand with the standard valve spring runing a bd14 inlet and a standard exhaust cam?

 

what will you rev the engine too?

 

i dont think it has anything to do with power mate, its rpms and cam lift.

 

as above its down to lift on the cams and how far it revs etc,if you have platforms done etc etc..
Yours sounds pretty much run of the mill and will be fine on bd14 inlet..
It wont do 480 bhp though mate more like 450 bhp and 400lb ft...depending on porting and boost used???

cheers danny

 

Ive always found that the double springs make the engine more precise and nicer to drive on even std cams than the single springs.

 

unless the valves arnt seating properly i cant see how realy???



cheers danny

 

at high revs there is tighter control of the valves, valve springs are no differant to any other spring, and weaken with age, how old are the springs in a normal rebuild ??prob as old as the car itself !
that will be why.

 

why not just use std new ones though???
Iv always only used std unless using heavy cams etc..


cheers danny

 

and ive always used doubles - why not put std wheels on your car, why not use std brakes, because there are better items on the market for the job.

 

but when something is perfectly up to the job, why go to the extra hastle and cost of it

would you fit a 10" jag diff in your car when a ford 9" is fine ? just because its stronger

i agree with you iskys are brilliant and we use them alot, but on a standard ish rebuild theres just no need

 

and total overkill and not needed!!!

bit like people that put massive turbos on thier std engines and run fuck all boost,waste of time and money....



cheers danny

 

I wouldnt use iskys, they too old and dont really fit - they were not designed for that engine, and new std springs are just as much as a set of doubles these days, so no not overkill or expense in this case, and been there with the jag diff many years ago, yes they are alot cheaper than the 9", but weight twice as much - which road would you like to take sir?

not really, depends on what your trying to achive, why ring the neck out of a T34 when you could have the same power/driving characteristics from a GT30 with lower EGT's

dont adlib with a genius im sure you know the score.

 

oh fuck i just realised your the knob thats always right even when hes wrong!!!
So now your going to run double valve springs on a std engine and a gt 30 with no boost because it will lower your egts and still drive as nice????
I suppose it wont be laggy either???
what you drinking tonight mate because i think il get myself a bottle tomo!!!


cheers danny

 

dont go into detail with the diffs, i know the differences it was merely a statement for you to see what you were saying..

iskys too old, are you saying you wouldnt use them because theyre old technology ?

theyre still as good if not better than the double valve springs out now, yes they need head mods, but worth it for the reliablility of them on a race engine !

 

are you looking in the mirror again Danny LOL ! !

Jim, since the days of utilising a spring of the old F1 era, there have been developments and new materials used, not saying the iskys dont so the job they are fitted to do, but the work that is required to fit them is no longer required as there are now specific springs developed to fit in the hole.

there will become a time when you may need to drop a platform, but it wont be for a BD16 ever.