44014 Posted April 10, 2015 Share Posted April 10, 2015 Ok so, I have purchased a an L28et with am ecu and rb25 turbo now the thing that worries me is that from all accounts there is no point in revving it past 5500... This will frustrate me. so I got thinking, I have a nasty cam already that i could install into the P90 from my E30 Specs are as follows for the 369C camshaft. http://www.tighecams.com.au/profiles3/nissanlseries.htm If i was to use this cam on my turbo motor how bad would it be? I mean im ok with a soft bottom end if i can rev it to 7000rpm and have boost by 3500/3800rpm Im just worried about it being to hard to tune due to the fuel being blown out the exhaust and the ecu seeing it as running rich all the time... Thoughts? Quote Link to comment Share on other sites More sharing options...
Enzo Posted April 10, 2015 Share Posted April 10, 2015 Hi, Aggressive cams designed for normally aspirated engines don't work well with turbo's. Get a turbo grind if you want to go that way. Stock cams work fine with turbos and you don't have to rev the guts out of the engine to develop good power. A good system should give you good and smooth power from low revs. Back in the early 80's I was racing turbo cars with draw through carby's. Prior to going turbo I had a hot 2.0 litre escort engine bored oversize with machined 202 Holden pistons, hot cam ,headwork and twin 45mm Weber carbs. This got reved to 7300rpm and rebuilt every 6 months. After changing to a Garret turbo with a single draw through 45mm Weber carb and a stock camshaft, this engine put out twice the HP and only needed to be checked every 12 months. I had stripped it down after the first 6 months as usual and found that the wear and tear on the engine was nothing compared to the higher reving normally aspirated engine. With the turbo I didn't go over 6000rpm as max HP was in by 5500rpm. Double the power and less maintenance. David. Quote Link to comment Share on other sites More sharing options...
dat2kman Posted April 10, 2015 Share Posted April 10, 2015 You do not want duration, and no need for lift. Peak rpm will be dictated by the effociency of the turbo. Stick woth stock P90 cam Quote Link to comment Share on other sites More sharing options...
jock Posted October 26, 2015 Share Posted October 26, 2015 You need a cam with more exhaust lift, and a little more exhaust duration, i.e. anything to help spin up the turbine and reduce back pressure from upstream of turbine , then the next bottle neck will be manifold , turbine and so on. Stock engine , then keep it stock. Quote Link to comment Share on other sites More sharing options...
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