4age to 8000rpm

[ants_ae92]

Im rebuilding an ae92 hi comp redtop block with a big port head. Will these rods have any problems revving to 8000rpm. Some say they are the same as the 20v? some say they are different. Do the cams make a difference?

I was going to get 272 deg cams. will I still be able to rev to 8k and make power? I know blue top cams run out about 7k?

And who does 4age cams in auckland?

Can Anyone shed some light on this matter.

[Mr Revhead]

stock 4age rods will handle 8000rpm with no problems at all.
all big ports have the earlier rod so they arent the same as the 20v. some small ports have the same as the 20v.
the rods you have were also used in the 4agze, as were the 20v type later on.

ill leave the cams to some one smarter than me

[ants_ae92]

Thanks Mr Revhead.

The main thing I want from the cams is to have a strong mid to high power band. And basically be able to rev higher to 7500rpm - 8000rpm and still make power. Will 272deg be a big enough duration?

[10k 20v]

272 should be enough but the figure for really knowing is the duration a 0.50 thou.
8000rpm will be a walk in the park for stock rods. just fit some arp bolts to them and replace the bearings if your rebiulding. is 8k past the stock rev limit? or are you changing the computer.

I don't recomend camshops in nz as i've never had enough dealings with them myself to determine good from bad but franklin cams is in pukekohe.

Have you checked out bill sherwoods site?
That maybe able to shed some light for you

[kingcorolla]

yea Bill Sherwoods page is great.
Im also building a capable 4a-ge, and ive just recond & aligned the OEM rods and pistons, and balanced the shortblock assemby - blah blah- click my proile for more.

as for cams, IMO i dont think an ecu is nessacary unless you want/expecting BIG power. So im going with a performance regrind from kelford,(chch) To make the most out of stock ecu, for now. But if you upgrade ecu, you can play with big durations/lift alot more, and still achieve low end torque - drivabilty.

it all comes down to the $$$ [/url]

[Drifter4ag]

pffft sherwood


.

[EVLGTZ]

pffft sherwood


.

indeed

[JT]

pffft sherwood


.

indeed

Why you say that, because he doesn't play with boost?

Or is there something else we're missing

[Mr Revhead]

some of bills info is a little off. but generally hes spot on. his site is definitly worth looking at. i wouldnt ridicule it
its like any thing off the net. confirm it elsewhere

[10k 20v]

you can never take anything for gospel on the net but it gives you a better idea

his vvt story totally wrong

[suberimakuri]

also he's too based on computer simulations..... and never dynos or drags anything......

his swaps take a long time (granted he's a pilot)..... but on the whole seems to be a lot of talk and not much action.

Lyn Rogers doesn't play with boost, and he admits it, but I'd listen to what he has to say.

[10k 20v]

lyn rodgers = god of na 4age tuning

[JT]

you can never take anything for gospel on the net but it gives you a better idea

Yup, what you pay for the advice is how much you should value it.

As for the vvt info, I don't know alot about it so I wouldn't know what was wrong. Have you contacted him to let him know? Everyone makes mistakes but if no one is willing to correct you it makes things hard.

On the other hand there's not many people out there who can back up what they claim. I know there was a time when most people round here thought that the blacktop had VVT-i (including myself). I have never pulled a blacktop head to peices and it was only when redmist spoke up was everyone corrected.

Does lyn rodgers have a website with any information on?

also he's too based on computer simulations..... and never dynos or drags anything......
his swaps take a long time (granted he's a pilot)..... but on the whole seems to be a lot of talk and not much action.

Last thing I heard his ae86 with NA bluetop was in mid 14's, now he's half way through putting the altezza engine in it.

[ants_ae92]

Mine revs to 8k at the moment. I havent played with the computer but maybe the previous owner did. Also no Jap 180km limiter either, or is it a bit higher. (not that I see 180km on nz roads).

Have seen sherwoods site before, but I wanted to know if anyone has actually done 4ag cams before.

Ive heard that 272 is the limit on stock ecu. Otherwise you lose manifold vaccuum and it idles like a pig? Club 4ag had a tech thing on cams, but basically it was more of a buyers guide and info on how cams work sort of thing.

I am rebuilding the small port. Going to keep my big port head, hence no computer change. Cams, compression, cold air box. etc

Kingcorolla, what are your plans? NA 4ag, what cams and that are you going for. What can kelfords do? Regrinds of standard cams? and how much

[suberimakuri]

JT: Where's the slips?

The bigger the cams, the less vacuum your car will idle on.
Stock cams on 4age idle around 35kpa.
With 272's i estimate it to be 40-45kpa. depending on idle rpm somewhat too.

I don't know how it would fuel. I would definitely be using fast map ecu if i had cams.

[kingcorolla]

Kingcorolla, what are your plans? NA 4ag, what cams and that are you going for. What can kelfords do? Regrinds of standard cams? and how much

Kelford can grind and reshape your lobes on your factory cams, enough for max power on stock ecu, anymore duration/lift and you start going downhill.. unless u fork out for a new ecu to kope.

i have done research on this and talked to a couple of people that have had it, and its a good upgrade- presuming there is more modification to make use of the cams, etc ex, intake. I believe performance modifications must work in relation with each other for max gains.

(ask for a 'street fighter' grind, costing roughly $500 for both- retail or $370 at trade price )

Kelford also change and set new lash-caps, so you can raise your compression without hassle. (and no tickety-tick-tick wen you re-install them ) What are your plans with TVIS?

[ants_ae92]

Karl - what is a fast map ecu. I have a map sensored 4age, red and black top.

Probably going to keep TVIS. That way standard ecu. Im not really keen on an aftermarket ecu. Mainly the price is a problem. If ecus were cheaper, I would go higher duration and lift cams with quad throttles of ae101 or ae111, and forged 11:1 compression pistons, and lots of NOS.

But $$$ are in shorter supply for me. So working with the standard ecu is a must. TVIS stays.

Other mods - Battery to boot and a cold air box. Already have extractors and 2 -1/4 inch exhaust. Put that together with 10.3:1 compression of the small port block, little more with thinner head gasket, the cams and if I get really get hungry for it, a wet system of NOS.

[vvega]

nothing wrong with tvis mate
leave it in less you are looking for over 200hp n/a
and if your goping for that
you already heading in the wrong direction :S

v

[ants_ae92]

But $$$ are in shorter supply for me. So working with the standard ecu is a must. TVIS stays

I am keeping tvis. Just like I said. If i was looking for 200hp I would have gone turbo. I just want a high revving na 4age.

[4agepwr]

has anyone got links to any lyn rogers pages/ sites/ articles?