*P3nfold* 0 Posted May 4, 2011 Report Share Posted May 4, 2011 Hey all,Do you really need this if you go forced, if so what BHP is the guideline?I have spoken to quite a few people running Vortech or VF chargers and they are running standard compression.I am looking at Rotrex or Turbo! Link to post Share on other sites
spadam 7 Posted May 4, 2011 Report Share Posted May 4, 2011 Rotrex or turbo you will definetly need one. If you get an instance of boost spike without without a head spacer say good buy to your engine. I have both arp bolts and headspacer for sale if your still intrested. Link to post Share on other sites
*P3nfold* 0 Posted May 4, 2011 Author Report Share Posted May 4, 2011 Hey Adam, I will defo have your arp bolts, thats a given mate. Just need to meet up and take them off you.Headspacer I got off Tony as he is doing the build with me. Link to post Share on other sites
*P3nfold* 0 Posted May 4, 2011 Author Report Share Posted May 4, 2011 I was thinking of leaving the head spacer off and putting a new gasket with ARP headbolts to start with. Link to post Share on other sites
craggsy 91 Posted May 4, 2011 Report Share Posted May 4, 2011 Put the spacer in if you are taking head off.....saves having to do it all again as you will have to get another headgasket Link to post Share on other sites
jims13 6 Posted May 4, 2011 Report Share Posted May 4, 2011 you will need a head spacer.. they aint mega money as you no, and imho it isnt worth doing it in 6 months time , if you've got to take it all apart now . Link to post Share on other sites
*P3nfold* 0 Posted May 4, 2011 Author Report Share Posted May 4, 2011 Good point guys thanks for helping.Hey Jim I am still looking at the turbo option will try to catch up tomorrow with my shopping list, tbh there's not a lot in it between supercharging and turbocharging for around 300bhp, as you said it really depends on the turbo e.g. an original Garrett or Chinese special.I am also thinking about Sparkz turbo lump or the V3 charging kit.My only reservation on the v3 is that its only 76% efficient compared to Rotrex which is 96%. More power. Link to post Share on other sites
jims13 6 Posted May 5, 2011 Report Share Posted May 5, 2011 mm, vortech.. me personally i dont like them , but im spoilt having had a nice vr6 turbo before. id always go turbo, as it easier to ring more power out of it.having said that the rotrex chargers are becoming more affordable and give good results Link to post Share on other sites
bungy 2 Posted May 5, 2011 Report Share Posted May 5, 2011 If you are doing the head gasket then you might as well do the spacer. If you are doing both of those then you might as well do the bolts and new gaskets is a must. Link to post Share on other sites
FishWick 21 Posted May 7, 2011 Report Share Posted May 7, 2011 Hey MartinForget standard compression and boost mate! Get that spacer onboard :-)There's a lot of bullschitt on the Vortex about stock compression and 10, 15, even 20psi of boost. Don't believe a word of it and certainly do not follow their lead! Link to post Share on other sites
russj249 2 Posted May 7, 2011 Report Share Posted May 7, 2011 On the subject of spacers and compression ratio's... standard being 10:1 if i remember correct, does what boost your running have a part to play in how thick the spacer and therefore how low the compression will be? is there a safe ratio for 90% of turbo builds?with my build, i will be running at 7psi (to start with) on 8.5:1 ratio, that being a 3mm thick spacer. Link to post Share on other sites
Lowlifedubber 9 Posted May 8, 2011 Report Share Posted May 8, 2011 Id also like to jump in on this if i may.(rather than start a similar thread)I will be popping a vr6 into my car with the intention of sticking a supercharger on it,it will be a low miles engine that i will be building from the bottom up.Id rather not use low comp pistons if the head spacer will work.My question is,im wanting to put the engine in and get it running and drive it while i collate the rest of my parts for FI.When im rebuilding it out of the car i would have preffered to put the spacer gasket on then.If i was to drive it with this,but without forced induction would it have a detrimental effect on my engine?Massive loss of power,running too lean etc?Many thanks. Link to post Share on other sites
russj249 2 Posted May 8, 2011 Report Share Posted May 8, 2011 You shouldn't notice much of a drivability difference, however the power won't come in untill higher up the rev range. You're doing the same as me, rebuild engine prior to charging. Link to post Share on other sites
Lowlifedubber 9 Posted May 8, 2011 Report Share Posted May 8, 2011 Ah that's good to know thanks.I'd rather it be set up and running after the conversion before it gets charged,that way if there are any niggles before I can rectify them before stressing the crap out of the engine. Link to post Share on other sites
FishWick 21 Posted May 9, 2011 Report Share Posted May 9, 2011 The only charger that doesn't need compression lowering is the Vortech V9, mainly because it's pretty small and comes in very progressively.For turbos and rotrexes, I would go straight to 8.5:18.5:1 with a turbo / charger is fine 'off boost'. 8.5:1 with no charger or turbo will feel a bit flat low down but a lot more timing can wake it up again, but that needs a remap. Link to post Share on other sites
pauly 0 Posted May 23, 2011 Report Share Posted May 23, 2011 so i heard you buy a original gasget drill out the rivetts and sadwitch the spacer.is this right or fit a gasget both sides Link to post Share on other sites
russj249 2 Posted May 23, 2011 Report Share Posted May 23, 2011 You're right 1st time. Get an original 3 layer gasket and drill out the copper rivets. Remove that center piece and replace it with the spacer plate Link to post Share on other sites
*P3nfold* 0 Posted May 24, 2011 Author Report Share Posted May 24, 2011 I believe the mk4 headgasket is best? Link to post Share on other sites
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