JAS's Rebuild and twincam conversion. 302kw atw baby!!!

bridgey · Post by **bridgey** » Thu Apr 07, 2011 9:06 pm

why dont you whip your cams down to kelfords? Peter Kennard there did an amazing job on mine

OLD FART · Post by **OLD FART** » Fri Apr 08, 2011 5:36 am

bridgey wrote:why dont you whip your cams down to kelfords? Peter Kennard there did an amazing job on mine

^^^^^ I second that .
When we were over in NZ on holiday I had the taxi drive from the airport to our hotel in Cathedral Square via Kelfords to pick up my 264/270 cams and springs :D

RiceThief · Post by **RiceThief** » Fri Apr 08, 2011 6:50 am

bridgey wrote:why dont you whip your cams down to kelfords? Peter Kennard there did an amazing job on mine

Hey bridgey,

What are the specs of the cam you got and if you dont mind telling what price was it?

Sargeant_Khan · Post by **Sargeant_Khan** » Fri Apr 08, 2011 8:27 am

It doesnt make much sense to have the same cams in a head with bigger ports?

dirtygalant · Post by **dirtygalant** » Fri Apr 08, 2011 3:04 pm

There are lots of other variables as well - compression ratio, plenum chamber size etc, and the fact that the VR-4 has dual runner manifold which at low rpms negates the fact that it has big ports.

fugazi · Post by **fugazi** » Fri Apr 08, 2011 3:58 pm

There are some more parameters than lift and duration on a cam...

thrash · Post by **thrash** » Fri Apr 08, 2011 5:07 pm

dirtygalant wrote: the VR-4 has dual runner manifold which at low rpms negates the fact that it has big ports.

would you mind explaining this a bit more?

FST4RD · Post by **FST4RD** » Fri Apr 08, 2011 6:26 pm

Well done Jas! That's some good numbers none the less, better then a poke in the leg with a prison shank.

JAS · Post by **JAS** » Sat Apr 09, 2011 8:17 am

Sure is mate! :beer Thanks for that mental image

perrinsohc · Post by **perrinsohc** » Sat Apr 09, 2011 12:32 pm

Good work mate, better update your signature then ae = )

JAS · Post by **JAS** » Sat Apr 09, 2011 12:57 pm

haha yes. Ill do that now :)

dirtygalant · Post by **dirtygalant** » Thu Apr 14, 2011 7:44 am

thrash wrote:
dirtygalant wrote: the VR-4 has dual runner manifold which at low rpms negates the fact that it has big ports.
would you mind explaining this a bit more?

JDM E39A Galant VR-4s have an inlet manifold with dual runners, ie two runners per port. Of these 8 runners, 4 of them have butterfly valves in them controlled by a vacuum diaphragm, a reservior and a series of solenoids. At low rpms the butterflies close off so only 4 of the 8 runners flow air - this greatly helps with low and mid-range torque delivery as the velocity is increased. At high rpms the butterflies will open for maximum flow. It is a bit of a comprimise but it appears to work relatively well, until you are chasing maximum power numbers. It works exactly the same as Toyota's TVIS and is not to be confused with dual length runner manifolds which work differently, like the E33A Galant AMG inlet manifold and the inlet manifolds on Verada/Magna V6 and HJ Galant V6 engines.

Here's a video further explaining it -

dirtygalant · Post by **dirtygalant** » Thu Apr 14, 2011 7:47 am

also Jas, not sure if this would help but a friend of mine upgraded to 264 cams in his Evo4 and he feels it greatly improved his mid-range power/torque, before he feels it didn't have as much mid-range it could have. I think he's running an Evo9 TD06-20g turbo, larger injectors, lots of boost etc. It's putting out something like 240kws at the wheels anyway.

JAS · Post by **JAS** » Thu Apr 14, 2011 10:18 am

dirtygalant wrote:also Jas, not sure if this would help but a friend of mine upgraded to 264 cams in his Evo4 and he feels it greatly improved his mid-range power/torque, before he feels it didn't have as much mid-range it could have. I think he's running an Evo9 TD06-20g turbo, larger injectors, lots of boost etc. It's putting out something like 240kws at the wheels anyway.

Im making 258.9kws at the wheels. 347hp times 0.746 is 258.9 kws.
240kws sounds a bit low. Or maybe my hp is where it should be...
Mine will always be higher than a evo as its only going through the rear wheels and hasnt got the extra loss a 4WD system would have.

Anyway, I priced up a set of 264s and some springs with kelford yesterday. Around a grand trade price plus GST. But I dont want to spend another grand on it at this stage.
And to be honest its plenty fast enough for me at this stage anyway...

kiwieurospec · Post by **kiwieurospec** » Thu Apr 14, 2011 2:06 pm

JAS wrote:And to be honest its plenty fast enough for me at this stage anyway...

Was gonna ask whats it like in the real world? (if you can find a flat road anywhere) I decided when I did a mates car to 290kw that I didn't want or need that kind of power in a road car.

Austarion

JAS's Rebuild and twincam conversion. 302kw atw baby!!!

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