Jompa x40 Nordic Posted December 23, 2008 Report Share Posted December 23, 2008 Basically all cylinder heads can be fitted but I recommend that you use mechanical lifters despite the fact the newer heads use hydraulic ones. When running high revs mech lifters are the only ones that can cope with the fast pace. For street use I had 8.500 rpm rev limit and for track use I ran 9.500 rpm's with no problems. Link to comment Share on other sites More sharing options...
tcode1568908558 Posted December 23, 2008 Report Share Posted December 23, 2008 Hi Jompa,I'm reving hydro lifters at 7k rpm. Can I go a bit further, if yes how much? Link to comment Share on other sites More sharing options...
Jompa x40 Nordic Posted December 23, 2008 Report Share Posted December 23, 2008 tcode wrote on Tue, 23 December 2008 16:44Hi Jompa,I'm reving hydro lifters at 7k rpm. Can I go a bit further, if yes how much?I've always used mech lifters on Volvo alu engines (i.e. 850, S60, S40 etc.) when the rev range goes above 7 krpm's. This is more of a "better safe than sorry approach" as my engines are mostly used for track racing where you can't afford "accidents". The only engine (to my knowledge) using hydro's in combination with high revs had rpm limit at 7.800 rpm's and that eventually didn't work out so... 7.5 krpms might be a good place to consider swapping the hydros for mech's. I don't know to be honest... Link to comment Share on other sites More sharing options...
tcode1568908558 Posted December 23, 2008 Report Share Posted December 23, 2008 Jompa x40 Nordic wrote on Tue, 23 December 2008 23:06tcode wrote on Tue, 23 December 2008 16:44Hi Jompa,I'm reving hydro lifters at 7k rpm. Can I go a bit further, if yes how much?I've always used mech lifters on Volvo alu engines (i.e. 850, S60, S40 etc.) when the rev range goes above 7 krpm's. This is more of a "better safe than sorry approach" as my engines are mostly used for track racing where you can't afford "accidents". The only engine (to my knowledge) using hydro's in combination with high revs had rpm limit at 7.800 rpm's and that eventually didn't work out so... 7.5 krpms might be a good place to consider swapping the hydros for mech's. I don't know to be honest... Thank you. I don't intend to go more than 7200 rpm's on this head. Having head with mech lifters in my garage already, just waiting for some nice cams to show on . Link to comment Share on other sites More sharing options...
loseR99 Posted December 24, 2008 Report Share Posted December 24, 2008 So in swapping from hydraulic to mechanical head, VVT will be gone? What type of service interval is the valve adjustment on a high revving mechanical Volvo head? Link to comment Share on other sites More sharing options...
sachal007 Posted December 24, 2008 Report Share Posted December 24, 2008 1clean01 wrote on Tue, 23 December 2008 19:41So in swapping from hydraulic to mechanical head, VVT will be gone? What type of service interval is the valve adjustment on a high revving mechanical Volvo head? how come my stock engine and my spare engine has mechanical cams?i thought 00-an up s40 had hydraulic cams Link to comment Share on other sites More sharing options...
VolvoF0RLifE Posted December 24, 2008 Report Share Posted December 24, 2008 torpis wrote on Tue, 23 December 2008 14:45Also there are theories that it is't really the 83mm bore that kills it, but the slot between the cylinders. the slot is 0.6mm on the older engines and 0.8mm on the newer blocks. with the 0.6mm gap the water boils away creating a hotspot cracking the cylinder wall... There are a bunch of guys filling the slot to prevent this happen...A cool 850 engine is bored out to 84mm, running ET10.10 in the 1/4mile, 153-ish trap speed... but that is not a daily driver.I never hear a 81mm crack, so better go with the 81mm even if the newer 83mm might hold up if modified the correct way... Dont you need coolant there to cool down the cylinders? what about a bigger front mount radiator with a quicker thermostat? lol. Link to comment Share on other sites More sharing options...
loseR99 Posted December 24, 2008 Report Share Posted December 24, 2008 sacsha1 wrote on Tue, 23 December 2008 23:421clean01 wrote on Tue, 23 December 2008 19:41So in swapping from hydraulic to mechanical head, VVT will be gone? What type of service interval is the valve adjustment on a high revving mechanical Volvo head? how come my stock engine and my spare engine has mechanical cams?i thought 00-an up s40 had hydraulic camsBecause both of your motors are from 2000. 01-up have hydraulic head with VVT. Link to comment Share on other sites More sharing options...
korayS40 Posted December 24, 2008 Report Share Posted December 24, 2008 can i order one? Link to comment Share on other sites More sharing options...
korayS40 Posted December 24, 2008 Report Share Posted December 24, 2008 that was meant for the tubular manifild by ajden....can i order one here (paypal) as soon as christmas day?merry christmas btw Link to comment Share on other sites More sharing options...
torpis Posted December 24, 2008 Author Report Share Posted December 24, 2008 koray33460 wrote on Wed, 24 December 2008 03:23that was meant for the tubular manifild by ajden....can i order one here (paypal) as soon as christmas day?merry christmas btwAjden does the manifolds, so better talk to him... ajden83@hotmail.com Link to comment Share on other sites More sharing options...
torpis Posted December 24, 2008 Author Report Share Posted December 24, 2008 VolVoF0RliFe wrote on Wed, 24 December 2008 00:15Dont you need coolant there to cool down the cylinders? what about a bigger front mount radiator with a quicker thermostat? lol.yes but in the little 0.6mm gap the fluid boils away... so some guys fill them out Link to comment Share on other sites More sharing options...
torpis Posted December 24, 2008 Author Report Share Posted December 24, 2008 1clean01 wrote on Tue, 23 December 2008 19:41So in swapping from hydraulic to mechanical head, VVT will be gone? What type of service interval is the valve adjustment on a high revving mechanical Volvo head? http://henke.rchomepage.com/s40upgrades/ you need a VVT-cover plate...Service interval is about the same as a stock engine (talking the life of the head) as you use better oil (Castrol TWS 10W-60) and change oil more often the head will not wear out. Link to comment Share on other sites More sharing options...
torpis Posted December 24, 2008 Author Report Share Posted December 24, 2008 1clean01 wrote on Tue, 23 December 2008 15:44So how much for an 81mm block with cooling mods done?$2400 for a complete 81mm block, with all mods done, new bearings, new rings, new waterpump and honed cylinders. Forged H-beam rods.this setup will hold up for 460hp, where the pistons are the weak spot. Link to comment Share on other sites More sharing options...
loseR99 Posted December 24, 2008 Report Share Posted December 24, 2008 How much torque can the aw55-50 transmission handle? I have heard 350ftlb before, is this true? I'm planning on driving the 40 as is until I blow it up, then i'll be coming to you Torpis for a built 81mm block and rotating assembly. Link to comment Share on other sites More sharing options...
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