yes amother tomi cam question

[BQ.05.TD]

i have been offered a set of 270 8.8mm cams at a good price but i dont know if there goin got be to big for wat i havebuilt ca etc with 2876r .64 rear that is soon to be sold for either 2871r or 3071r both with .64 rears

if any one has any idea wat there going to be like on the road plz let me know.
Modified by BQ.05.TD at 5:11 AM 4/4/2010

[themadscientist]

The duration is slightly lopey but not unstreetable. With the 3071 i think they would work real nice.

[NUT-CSE]

A mate has them in his exa and they seem very peaky to me but he is running a GT3076R with a .82 turbine housing. Comes on hard at around 5000rpm but with a smaller turbo and rear housing they should be sweet.

[dhessian]

If you want your powerband situated in the upper RPM's they might work well. The question to ask though, is a .64 backside going to be the limiting factor in the upper RPM's where the cams are going to shine. On that note, with 270's I would spin minimum 8200rpm.

(ks13)

[BQ.05.TD]

on another note kelford cams make 260 9.0mm lift cams. i thought the bigest lift you could go on stock head was 8.8? typo or just pushing there luck as there about the same price but not to shore on them. yes i know its only .2mm but you never knowhttp://www.camshaftshop.co.nz/....html

the 270s sound nice but i think they will just be over kill on my set up and power goals and wat i want the car to drive like

[meminto]

The lift value itself is generally not the issue, it's the base circle diameter of the lobes...

8.8mm is the general rule of thumb using the standard base circle diameter lobes...

Once you go higher you start risking lobes hitting the reliefs without making the base circle diameter smaller, relative to the lift..

There is plenty of room in the chamber

[BQ.05.TD]

well when th motor got built the engine builder said i had s*** loads of room in the valve reliefs of the pistons for big cams if i ever wanted to put big cams in. so the 9mm lift should be ok yer. i just think 270 isnt going to match my set up all that well

[croustibat]

i have a friend using tomei 260° 10.25 lift (with solid lifters) and a gt3071.

Freaking engine from 5000 to 9000 rpm ... dull under that. Having seen this i would never use 270 cams on a CA (i would rather use something like 254 or 256 in /260 ex, turbo engines seem to work best with a shorter intake duration)

see it there :http://www.youtube.com/watch?v=S6xTbl3wLyQ