I Want Everyones Opinion Please!!! Engines

[kermit55]

thanks again for the advice

[Rollaboy2608]

More details. Its not unusual for ANY OHC motor to snap camshafts on installation (even post install) or removal.

Well actually now that you mention it Wolf, it was on 2 fresh engines. I'm a mechanic and have never seen this sort of thing with any other motor. Both cams were run in correctly, so I find it hard to understand why it would be common??? Any explanation would be well heeded

[AE25]

i think you should change the poll to '4age turbo' just to clear things up... wasnt till i read thru the thread i found you were comparing ca18det to a turbed 4age.

also 300rwhp or crank hp?

 

my opinion is since the ca18det is already a turbo motor.. you'll have less issues/time setting it up. there should also be plenty of info on how to correctly modify them for the power you're after.

 

4age turbo requires custom parts to setup which could be quite costly if you don't have the skills to make yourself.

how much do you know about the various 4age? knowing which are the better parts to use can save you a breakage and make it more reliable.

 

ie use the later 7rib block if you can, which has stronger internals than a bluetop bigport and oil squirters up the piston bores to cool the underside of the pistons. biggest rods are in the smallport n/a or some of the red/black bigport engines.. along with the ae92 4agze. hard to say exactly what has what as there are too many variations. find some comparison pics to be sure. silvertop 20v have same rods as the ae101 smallport gze and although are smaller than the earlier gze, are ok for turbo use. gze pistons can handle a beating and can buy new for reasonable price so I'm told. 300hp on n/a pistons is asking for breakage, too much compression etc. starting with a 4agze would be a great start :P don't bother trying for 300hp if you have bottom end bearings that've done 150+ k's. for reliability sake have new bearings fitted with the correct clearances. getting 200hp from a turbo 4age is not hard. 300hp will require a bit more thought to the parts used and their flow properties.. turbo, intercooler, injectors, fuel pump etc all have to be up to the task. and i hope your using a programmable ecu to tune the thing! you got a budget in mind? haha

you could build a 300hp motor by putting a t3/t4 on a n/a 4age and tuning it out of detonation ranges.. its been done plenty of times.. but at the sake of reliability and drivability.

 

if i were doing it on the cheap, but keeping it reliable .. id get hold of a redtop smallport or silvertop 20v block and fit gze pistons, convert to rwd, make sure the bottom end is in good condition, put your desired head/intake on it, and build a turbo system capable of flowing the hp you're after. but don't scrimp on tuning it with aftermarket programmable ecu. this alone will add a heap of reliabilty when tuned to safe air/fuel ratio's.

 

doing it on the utmost lowest budget.. use a cheap 4age and put your turbo stuff on it.. eventually when it runs a bearing or cracks a piston crown.. buy another cheap 4age and swap your bits on it and go for a while more. heh heh

um hope that helps if you didn't already have that kind of info.

ps don't believe everything you read on the net

Edited September 23, 2007 by AE25

[RiverSide]

The CA18, as per usual is gettng a bit of a bad wrap here.

 

as an example, I was running an unopened factory CA18det with GT2871R turbo and supporting mods at 20psi (0ver 200rwkw) for over a year before it wore out. Bare in mind, if this car was started, it was drifted. So it didn't have the easiest life. given that the engine was over 15 years old when i got it, i think that is a pretty fair life span.

 

My strongest suggestion is to fit a quality oil cooler. This offsets the oil return issues by increasing the capacity.

 

Basically.........if it were me, i would be fitting a CA into the rolla.

 

In fact i would do it to mine if i could convince myself to spend any substantial cash on a rolla. I can't even bare to part with the cash to fit a stock 4age.

[LittleRedSpirit]

The question is, are you a purist? Turbo 4age.

[MRMOPARMAN]

something i don't think anyone has touched on, is he pulled it from an ae82, making it likely its a bigport. if so i wouldnt be turbocharging it past 7psi or so