standard springs go to 8k so unless your going a mental on the spec not worth it
I was thinking if I get a new camshaft setup next year, could I get the car to rev to 8k and produce power until 8k through new springs too?
Or is it just not worth the hassle?
Haha, no chance mate.
You won't need springs unless you go for big cams, big cams will need pistons for valve clearance. 8k will also mean you need good rods, rod bolts and valves. Besides, the hydraulic lifters will not like you for long at all going to 8k!!
If you want 8000rpm - then to do it reliably you'll need to uprate the top end with mechanical lifters. - You'll be at a £10,000 build then.
You can do a reliable hydraulic lifter build to take 7500-7700rpm for about £6-7000. Or you can just bash in some 402's and springs and rev the **** out of it, but it will only get you bragging rights down the pub and not any power. 402's just are not wild enough to be revving that high.
Ah, so you could do it, but it won't be making power anywhere above 7.5k? No point really then, if I want sound I'll get a civic that revs to 9k, but that's not my style.
Thanks for the insight mate!
Yes you could do it, but it wouldn't be reliable or making power unless the other components are built to match. There is no half measures with this kind of work really, not if you want it doing properly. The most cost effective thing to do woul dbe stick some 402's in and set the limit to 7500. Anything more has so many cost implications frankly it's not worth doing.
For the money of a big build I would put a K20 and JDM LSD box in. I wish I had done that to be fair.
Is there a benefit going above 402's or, like you said earlier, do you then require different springs? What's the most extreme you can put in there without affecting reliability? I don't really care for comfort.
Everything I've ever read before (including catcams) normally say 7500 and above needs stiffer springs.
Trying to appy some logic and checking part numbers, the Cup Racer, R3 Access and R3 Maxi all use 77 11 160 277, the Maxi revs to iirc 7800? If someone can check what the standard springs are, I bet it's these.
The Maxi Evo uses a different spring (77 11 162 500), I don't know the revs those things go to, but gotta be 8500 or more.
To try and conclude, I think for longevity 8k is really pushing standard springs. Im sure they'll survive because it looks like they do in Maxi spec - but for how long is the question. Maxi's get frequent rebuilds so probably new springs frequently.
So I would suggest to keep standards for 402 and debatable on 403 equiped cars. Above that and Catcam say 404 and above need them so I def wouldn't go against that.
They will Rev to 8k all day long on uprated valves and springs and hydraulic lifters. No worries there.
There's is no point in spending money on it, the spec beyond this is race engine territory. Will you be racing it? I doubt it. So it's pointless for a road car. It's such a waste and a let down in these cars. The drivability will be terrible for a road car and will give you less power low down the further you keep pushing the power and up.
Mine had Schrick cams and everything standard, and pulled hard to 7.8k. Unless your building a race engine there isn't much point. Plonk some cams in, after than your spending mega money per 1bhp. Power isn't everything, it's drivability that matters as well.
There is a reason why no one does this, because the gains are rubbish, and even with the minor increase in power the reality is you won't be much quicker, and a mapped diesel will still be on your tail.
Or buy a civic. Spend 2.5k and have between 250/60bhp
If I spend the extra on Schricks or just go for 402's will the rev limiter be okay to go to 7.8k? Obviously as Rich has said previously, reliability becomes an issue. However if there's a little performance to be squeezed out of the top end with a little raise, surely it can't hurt going to 7.8k? If I find that the power drops off, then I'll just keep the rev limit standard.
Rich has spent 7 and is already disappointed, and im willing to bet a standard car with schricks will be the same pace or a fraction slower in real terms. I don't blame him for being defensive and commend him for carrying on, I've done it myself. But the outcome is always the same, you wish you didn't bother lol!A standard FD2 will be quicker!