Do it right, do it once ! Gets expensive otherwise
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Do it right, do it once ! Gets expensive otherwise
cheers guys
12.5:1 :eek:
Thats how you will get the power, but longevity will be compromised - but then if you are chasing 250+ longevity isnt really a top priority...
Mine is 11.5:1 as it was built to stay flat out (oval racing) and still manages to get decent figures, so dont think that you have to ramp up the CR to chase these figures.
After all's said and done - I wouldnt even think about power - anything over 240 is awesome - and if you can get teh torque in a good place, then thats more important imo.
Plus whatever the power is, it will be different on different rollers/people wont believe the power/and you will only get upset if it isnt as high as you wanted it.
:)
it going on the same rollers speky's is done on will think there dinodynamics and i hope it dose get what he aiming for he put so much time money and effort and a lot of thort in to it
Sadly Dyno Dynamics rollers are very accurate so expect to be dissapointed if its not specced perfectly.Quote:
Originally Posted by Danny s-p
If you read through Giles's thread on Mig you will see how much time/effort and money he put in yet it still took several attempts to get past 260hp.
I have no doubt the spec is good but its the smaller details that make that last bit of difference.
12.5 is ok tbh, giles was at 12.6, its not too excessive, certainly not for something you will only run on decent fuel, but its how you get the c/r thats important, contrary to popular belief a massive intruder piston into the chamber will not do the flame front any favours...Quote:
Originally Posted by Will F
what gearbox you going to run? as that will have a big an effect on how well the car goes as the engine imo
Its going on a F28 lee
really wants a straight cut box weather its like mine sccr f20 quaife gear set or sumit like lee has a dog box, f28 just seems a waste and i dont think will take the high revs! (changing gear etc) f28s are unreliable all are old and parts and pretty few and far between bearings etc!
hmm, well the synchros wont cope with the revs, thats for sure, even on a sccr box they struggle, a good second pause against the gate sometimes to let the box slow down a little to stop them crunching in giles' cav, but at least then the ratios are suitable for the engines probable power characteristics,the ratios are too far apart on the f28 so you may even drop off cam between gearchanges, really it wants a dog box
Gaz'd ran a F28 in the end as they kept blowing F20's to pieces, in fairness though in took the revs but then it also had probably upwards of 300lbft to drive it through the gears which this won't have.
I have a brand new Quaife gearkit sitting here, still wrapped as supplied from Quaife £1000