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Took the car for a 20km drive & it goes quite good apart from the rough idle which is a combination of the cams & loss of compression. There is a noticeable air leak behind the alternator area. Just wondering how much horsepower it will loose at the next dyno meet (10rwkw?).:nono: Probably...

Just did a compression test & there is no change %()&^^!!!!!:cry: The only other thing that I changed was the two intake manifold gaskets with some really thin aftermarket ones:nono: I will buy genuine Toyota ones & see if thats the problem otherwise I give up:3d_frown:, beaten by the 7M...

Well I have been stuffing around with the head for the last few hours, its damn hot around 40C:icon_mad: Pulled the cams out & replaced the three buckets that were a bit tight. Checked the valve clearance::icon_bigg I - 20 22 25 20 24 22 20 23 24 24 20 18 E - 25 25 22 25 22 25 21 26 25 23...

Dont think so but I had to take it to two different workshops for the shave as the first place did a real rough finish that would have resulted in a BHG within minutes of startup. The shim clearances were all over the place & I had to change most of them. Maybe I made a mistake in checking...

Intake at around .20 mm & exhaust around 0.20 to 0.27. Will remove the cam covers tomorrow & double check. Installed new springs so dont know if the increased seat pressure would have anything to do with it either.

Recently I put on a ported head on the 7MGE using ARP studs & did a compression test today as it did not perform as good as I hoped: 160, 165, 130, 170, 100, 170. With the old head it had very good consistent compression. Wet test #3 stayed the same & #5 only went up around 5 psi so I...

If it backfires when you are cranking it the timing is incorrect. Set the crank to 0 remove & reinstall the distributor correctly & check your timing, should be 10 degrees BTDC (standard) or a little bit higher.

I might try to fit one on at a later stage but here is a chart that shows the impact on the torque curve.

The dyno figures were obtained in 2nd gear. Same dyno & same method to try & keep things consistent otherwise its very hard to compare results. The hidden stuff only relates to my details & the workshop name. I have seen cars on this dyno up to 220 km/h (137mph) so dyno speed is not an...

MX83 auto (A340LE) 1990 Cressida with 238k Hurricane extractors (Aussie brand as the US brands wont fit easily) 2 1/4 inch from end of extractors, standard cat, mid & rear muffler Titan adjustable cam gears BC 264 cams Everything else standard I dont think 160rwbhp is low as it was...

Got the car dynoed: 1 - stock cams & extractors with too much intake cam advance (134rwbhp) 2 - stock cams & extractors standard cam timing (143 rwbhp) 3 - BC264 cams (152 rwbhp) 4 - BC264 cams (160 rwbhp) different cam settings Mine picked up gains from 4700+ with around a 20rwbhp gain...

More fiddling with cam timing setting & found that 0 Intake & +4 exhaust ( 44 degree overlap) idles very good & I would use this as a starting point setting if installing these cams for the first time. With this setting you can obtain a lot of static timing advance avoiding having to file the...

I had the turbo intake cam in mine for a while & liked it. It has 10 degrees more duration than the NA cam & slightly more lift. The exhaust cams are identical. Got reasonable power out of it, 155 RWBHP, with only exhaust mods but our Aussie dyno figures are always lower than yours. Only had...

Yes you can use the GTE cams. The exhaust should be identical & the intake has slightly higher lift & 10 degrees more duration. I used the intake in my GE & got slightly better performance. As far as the cam caps you would have to take them & the head to a machine shop that can line bore the...

Hi I certainly would not be put off by what has been said in this thread. The 272's have more aggressive specs, & will probably be more effective after 4,500 rpm compared to the 264's. All we are saying is that they are not a straight drop in & expect perfect idle/manners. They need a...

The more I look at those pictures the more I am confused with his logic. As the engine & cams turn clockwise then moving the pin to the left of centre, for both the cam & wheel, would be advancing the cam & not retarding it.

OK more fiddling with idle only: I -3 E+4 110 1/2 -1 good idle I -6 E+4 109 +2 good idle I dont think the ECU likes the negative overlap of around -8 or more. Under that figure its reasonable. You can definately feel the strong pulses when you put your hand behind the...

Well I finally installed the cams last night, setting the valve clearance at pretty close to 8 thou intake & 10 thou exhaust. Put them as close to 0 & 0 as I could see, didnt have to be 100% accurate as I have adjustable cam gears on both which gives me +/- 12 degrees to play with...

One thing that I just thaught of that could have contributed to my previous engine using so much oil. How hard is it to install the valve stem seals incorrectly? When I checked them there was a small gap, maybe 1 mm, at the bottom of all of them. Would that be sufficient to allow the oil...