BIG cams daily?

[Fantapants]

hey guys.

looking at daily engines for my ke70 silver sled of danger and death.

Have a bunch of options floating around, however one of them is a 4age blacktop engine package. I have always fancied one, and its heaps of power for having fun in, however this particular bad boy has a fairly wild set of toda cams and springs etc. 304 degree with 9mm lift. While this all seems great and fun and all sorts of takumi, my responsible side, little as he is, keeps talking about how its going to be a right **** to drive day to day.

I have a close ratio 6 speed s15 box to go on the back of it, it has a decent overdrive gear of .76 and i will be spending about 2 hours a day on the highways...

i kinda really wanna get it just because, but also dont wanna loose sight of the fact its meant to be a daily...

advice from people who know shit would be greatly appreciated

cheers

pat

[oldcorollas]

does it still have the VVT? if not it will kinda suck. 304 is not a small cam for everyday driving, but it depends on your threshold of driveability...
the bad bit (with no VVT) is that bottom end (like.. up to 4K? will probably be fairly crap.... livable tho, but you'll tend to drive round at higher rpm just so it doesn't feel like a slug
with VVT, it will be much better and probably fine!

edit: apparently i don't know shit, so just ignore the above...

[Fantapants]

y dont you know shit lol??? its kinda what i thought. yes vvti has been disabled, and i kinda figured this would make the lower end sturggle a bit... but i figure the low end would struggle regardless...

[Hurricane]

i guess i depends alot on the build of the engine and how 'undaily' it might be. for me i dont really have such a thing as a daily for long lol.
but for me its ok as its mainly highway driving and very little start stopping.

things i find that can be enoying at times:
is fuel costs of a worked motor, start stopping with heavy duty puck clutchs, parking with locked diff and slow speed/start stop/crawling in traffic with a bigger cam.

but then it also depends on what u/other people can/will put up with in the none daily sense to what is daily/non daily.

one way to find out

[Bazda]

Depends on the ECU you are running, who is tuning it and weather you have a quad throttle setup or a sinlge.
If its a single its never gona be super nice to drive with the big cams.
If you have quads and the ecu is able to control them well then you will never know you have big cams.

On my dads race car we run well into the 300 duration and lift around 12mm on his n/a 2L cosworth engine which puts out over 300hp at the fly. Running an Autronic ecu and quad throttles. You would never know if had big cams, easily driven on the road. No lumpy idle etc.

[oldcorollas]

bazda, what does it idle at roughly?

[Bazda]

idles under 1000rpm. I think its near 800rpm.

[Fantapants]

well thats heartening bazda.....

i was thinking of fossing around with a vipec v44???? its currently got an adaptronic, but i think stepping up a little in the ecu department might yeild results...

[Fantapants]

also its a stocko bottom end, but i was day dreaming of putting together a 7a bottom end anyways....

fark ive almost convinced myself....

[oldcorollas]

800rpm idle for 300+deg cams with no VVT is fairly impressive! timed sequential injection or multi-batch?
any chance of a short vid?

[STATUS]

well thats heartening bazda.....

i was thinking of fossing around with a vipec v44???? its currently got an adaptronic, but i think stepping up a little in the ecu department might yeild results...

The vipec is just a link ecu rebadged, that said it is an awesome thing i had the equivalent of the v44 in a NUr spec GTR on the dyno on sat and it made a lazy 400rwkw... super reliable ecu with so many features you will struggle to find much better. We are not tied to any brands and it allows us to source and tune anything and i would run a LINK G4 or VIPEC over an Autronic/motec in my personal car anyday. http://www.skylinesaustralia.com/for...quered-tuning/

As for big cams that ecu should be more than adequate, i would however run a vacuum log under the manifold with a port from each runner plumbed into it to give a nice buffered map sensor signal... and get creative with part throttle mapping.. maybe use some of the multiple fuel maps (with concentrated low rpm axis) to get as much low end as possible.

what comp ratio does it have? (edit: read stock) we have quite a few come through that are over-cammed for the comp and dont really take advantage of the cam specs. ie would make more power on smaller cams.

[Celica RA45]

gee stewy any multi valve motor will idle ok down low with quads attached .but the trouble with the 20 v and the 304 is it wont be set up right as the middle valve gets real close at tdc lifter rise ,and at 50 thou the cam is most likely 250 to 260 and as you say .nothing will start to happen till 4k
im using 14.65 mm of lift and 262 at 50 thou and motor idles at 900 rpm and power is now 195kws at back wheels

[STATUS]

gee stewy any multi valve motor will idle ok down low with quads attached .but the trouble with the 20 v and the 304 is it wont be set up right as the middle valve gets real close at tdc lifter rise ,and at 50 thou the cam is most likely 250 to 260 and as you say .nothing will start to happen till 4k
im using 14.65 mm of lift and 262 at 50 thou and motor idles at 900 rpm and power is now 195kws at back wheels

obviously not a 4age @ 195rwkw, beams?

[Celica RA45]

well theres no way a 20 valve will get 14.65 mm of lift ,and yes 3sge beams with 2 stage injection 50mm quad throttles 14.5 to 1 comp now on E85and still using some vvti on both cams

[STATUS]

well theres no way a 20 valve will get 14.65 mm of lift ,and yes 3sge beams with 2 stage injection 50mm quad throttles 14.5 to 1 comp now on E85and still using some vvti on both cams

was just wondering... people claim all sorts of things on forums if you get my drift, was my acid test to read on or not...

E85 is great hey? i love the stuff and now that flex fuel is an easy option there is generally no downside for daily drivers, fill up anywhere on any fuel with no worries about det or over/under fuelling. Injectors are now so efficient even 2000cc (forced) on primaries are not an issue and fuel consumption can still be as good as stock on 98pump as it was with stock size injectors. What brand injectors are you using and how do you have them split cc wise? any reason you didnt go a single set of ID's straight up?