Toymods Car Club Inc: Tech & Conversions => 4AGZE with 271degree 8.1mm lift cams, standard computer. Anybody done this??

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Toymods » Tech & Conversions » 4AGZE with 271degree 8.1mm lift cams, standard computer. Anybody done this?? Show: Today's Posts :: Show Polls Email to friend

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4agte
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September 2004

Re: 4AGZE with 271degree 8.1mm lift cams, standard computer. Anybody done this??	Fri, 02 December 2005 23:23

here we go straight from the horses mouth Date: Thu, 12 Sep 1996 09:36:20 +1000 From: Rob Subject: MR2 SC: TRD 272 cams are in (part 2)Driving impression Hi Guys Now that its cooled down abit I decided to have another drive with the 272 cams in and with a bit more ignition advance, about 11-12ATDC. The cams really can be felt in a BIG way after 5000rpm, it screams to the rev limiter (7200rpm) like nothing else Ive ever driven, torque from about 3500-5000rpm is about the same, under 3500rpm there has been a bit lost. My impression is that the 272s in the SC would make a great track cam, but for the road, I really miss the off idle torque. Like I said in my first post, I think the E51 tranny is a bit too widely spaced to run this cam, it really needs the broad spread of torque that the standard cams give. Seeing that this is going to be my road car, Im thinking of whether its worth it to keep using the cams. I was thinking that using the larger Blitz pulley may get more torque back below 3000rpm. Or possibly I need to run my adjustable fuel pressure regulator to richen up the bottom end. All in all, I really prefer the low down torque than the top end scream, after all its not the most tuneful exhaust note Ive ever heard. I now feel that the stock cams with a bit of head porting and higher boost may be the answer. Im going to get a dyno run as soon as I can, just so I can see if more fuel is needed. If its running lean that may explain the lack of torque below 3000rpm. Then again the last time I had it dynoed I was getting about 10.5:1 Air/fuel mixture, so there should be plenty of fuel for the new cams [Updated on: Fri, 02 December 2005 23:23] [Report message to a moderator]

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