russj249 2 Posted November 10, 2011 Report Share Posted November 10, 2011 I've been doing a lot of searching lately on cams, I know that a 263 will give a nice mid range pull and a 268 will give more top end oomph..I've built my engine up with standard cams, but looking at what other spec I have, I'm not sure weather they're necessary or not.Are they really worth the extra, and is the power delivery much better? I can't seem to find a definitive answer for this.Also what do you think the difference would be running with gt35r, short runner, grant motorsports polished and ported head, 3 inch exhaust frkm turbo back, 440cc injectors but at 4bar (roughly 500cc ish)So to finish up, should I get a 263 before I take it remap at Stealth? Link to post Share on other sites
Daverse 175 Posted November 10, 2011 Report Share Posted November 10, 2011 With the turbo it will pull a lot better (obviously) and seeing as its going to be remapped anyway I would, saves you having to get it remapped in the future if you decide to get them. Link to post Share on other sites
russj249 2 Posted November 10, 2011 Author Report Share Posted November 10, 2011 My other thought was if it gives more power, I cab lower the boost to match what it would be without cams.For example if it made 350 at 15psi without cams, would iy be better to get 350 at 12psi for instance. Less stress on everything then, and won't up the power to an unusable level.Does that make sense? Link to post Share on other sites
craggsy 91 Posted November 10, 2011 Report Share Posted November 10, 2011 350 is very usable as a daily Link to post Share on other sites
russj249 2 Posted November 10, 2011 Author Report Share Posted November 10, 2011 I only work 1.5 miles from home, and that's traffic all the time so will be used daily, but never to its potential, other than a weekend where it might get a little play.I think I may fit the cams and lower the boost a little.. might sound a silly question, but if I was to have it mapped at 15psi with cams and thought it was a bit too much, would I have to have it mapped to lower the boost? I would imagine if I had it mapped at say 7psi, I'd definitely need it remapped to run 15, but how about the other way? Link to post Share on other sites
matty.vrt 120 Posted November 10, 2011 Report Share Posted November 10, 2011 get it mapped to the max boost you intend to run and then you can turn the boost down and it will still run fine all be it a little rich but nothing you should worry about. Link to post Share on other sites
russj249 2 Posted November 10, 2011 Author Report Share Posted November 10, 2011 That's fine then, I think i will get it mapped to 15psi, see what it kicks out and how usable if is, then lower the boost accordingly.On the VR6oc's Facebook page, somebody has replied to this topic saying standard cams for turbo. Why is this do you think? I seemed to find a few American websites saying use standard cams too, but on a search on here revealed that the correct cams can add up to 50bhp with the same boost. Is it something to do with torque? Ie more torque low down with standard cams or something? Link to post Share on other sites
russj249 2 Posted November 11, 2011 Author Report Share Posted November 11, 2011 So been looking about for a set of Schimmel 263's and can't find any anywhere in the UK.Now, DG Auto Tech are only 10 mins up the road from me, has anyone had any experience from them? Are they regrind cams or new billet?Are they good as an alternative? Or failing that can anyone suggest Schimmel in the UK with fast postage! Link to post Share on other sites
legvw 0 Posted November 11, 2011 Report Share Posted November 11, 2011 Why not try Cat Cams? I had a set in my 12v vr turbo lump, bit wilder then the schimmel, but did the job, plenty of top end power!QEP are the company I used. Link to post Share on other sites
russj249 2 Posted November 11, 2011 Author Report Share Posted November 11, 2011 How do you mean wilder? Are they a 263? It's definitely an idea, just need something quickly really before it goes back in for remap. Link to post Share on other sites
legvw 0 Posted November 11, 2011 Report Share Posted November 11, 2011 I think they are 27- something like that Link to post Share on other sites
michael5556 247 Posted November 11, 2011 Report Share Posted November 11, 2011 On the VR6oc's Facebook page' date=' somebody has replied to this topic saying standard cams for turbo. Why is this do you think? I seemed to find a few American websites saying use standard cams too, but on a search on here revealed that the correct cams can add up to 50bhp with the same boost. Is it something to do with torque? Ie more torque low down with standard cams or something?[/quote']I think that was my thread. I would get the cams personal and run it a couple psi lower then crank it up for play time Link to post Share on other sites
russj249 2 Posted November 11, 2011 Author Report Share Posted November 11, 2011 I think they are 27- something like thatI was under the impression anythin over a 268 on forced induction would have too much of an overlap? Maybe not so much on turbo with the extra back pressure, but supercharge is no good.And why does everyone on the American sites say standard? does it give a greater low down torque or something? Link to post Share on other sites
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